State |
 |
Water System Name |
City |
County |
| Alabama |  | Birmingham Water Board | Birmingham | Jefferson |
| Alabama | | Tuscaloosa Water & Sewer Dept. | Tuscaloosa | Tuscaloosa |
| Alabama | | Dothan | Dothan | Houston |
| Alabama | | Huntsville Utilities | Huntsville | Madison |
| Alabama | | Mobile Area Water and Sewer System | Mobile | Mobile |
| Alaska | | Anchorage Water & Wastewater Utility | Anchorage | Anchorage |
| Alaska | | Kenai | Kenai | Kenai |
| Alaska | | Juneau | Juneau | Juneau |
| Arizona | | Ajo Improvement Co. | Ajo | Pima |
| Arizona | | Why Utility Corp | Why | Pima |
| Arizona | | Arizona Water Company | | Cochise |
| Arizona | | Arizona Water Company | | Pinal |
| Arizona | | Arizona Water Co. | | Coconino |
| Arizona | | Arizona Water Co. | | Gila |
| Arizona | | Arizona Water Co. | | Maricopa |
| Arizona | | Arizona Water Co. | | Navajo |
| Arizona | | Arizona Water Co. | | Pima |
| Arizona | | Arizona Water Co. | | Pinal |
| Arizona | | Arizona Water Co. | | Yavapai |
| Arizona | | Bella Vista Water Company | Sierra Vista | Cochise |
| Arizona | | Mesa Municipal Water | Mesa | |
| Arizona | | Glendale Municipal Water | Glendale | Maricopa |
| Arizona | | Payson Municipal Water System | Payson | Gila |
| Arizona | | Phoenix Municipal Water | Phoenix | Maricopa |
| Arizona | | Scottsdale Municipal Water | Scottsdale | Maricopa |
| Arizona | | Tucson Water Dept. | Tucson | Pima |
| Arizona | | City of Yuma | Yuma | Yuma |
| Arizona | | Community Water Co. | Green Valley | Pima |
| Arizona | | Luke AFB | Luke AFB | Maricopa |
| Arizona | | Luke USAF | Luke AFB | Maricopa |
| Arizona | | Tempe Municipal Water Dept. | Tempe | Maricopa |
| Arkansas | | North Little Rock Water Works | North Little Rock | Pulaski |
| Arkansas | | Paragould | Paragould | Greene |
| Arkansas | | Community Water System | Higden | Cleburne |
| Arkansas | | Fort Smith Water Utility | Fort Smith | Sebastian |
| Arkansas | | United Water Arkansas | Pine Bluff | Jefferson |
| California | | Santa Clara | Santa Clara | Santa Clara |
| California | | Santa Rosa | Santa Rosa | Sonoma |
| California | | Santa Monica | Santa Monica | Los Angeles |
| California | | Canyon Meadows Water Co. | Bodfish | Kern |
| California | | Alameda Co. Water | Fremont | Alameda |
| California | | Anaheim | Anaheim | Orange |
| California | | Apple Valley Ranchos Water Co. | Apple Valley | San Bernardino |
| California | | Burbank | Burbank | |
| California | | California-American Water Co. | Baldwin Hills | Los Angeles |
| California | | California-American Water Co. | Coronado | San Diego |
| California | | California-American Water Co. | Duarte | Los Angeles |
| California | | California-American Water Co. | Monterey | Monterey |
| California | | California-American Water Co. | San Marino | Los Angeles |
| California | | California-American Water Co. | Thousand Oaks | Ventura |
| California | | Cal Water | Bakersfield | |
| California | | Cal Water | E. Los Angeles | |
| California | | Cal Water | Stockton | |
| California | | Contra Costa Water District | | Contra Costa |
| California | | Cucamonga CWD | | San Bernardino |
| California | | City of Napa | Napa | Napa |
| California | | Sacramento | Sacramento | Sacramento |
| California | | City of Vacaville | Vacaville | Solano |
| California | | City of Woodland | Woodland | Yolo |
| California | | Davis | Davis | Yolo |
| California | | Daly City | Daly City | San Mateo |
| California | | Escondido | Escondido | |
| California | | Fullerton | Fullerton | Orange |
| California | | Garden Grove | Garden Grove | Orange |
| California | | Huntington Beach | Huntington Beach | Orange |
| California | | Modesto | Modesto | Stanislaus |
| California | | Oceanside | Oceanside | |
| California | | City of Ontario | Ontario | San Bernardino |
| California | | Oxnard | Oxnard | |
| California | | Pleasanton | Pleasanton | Alameda |
| California | | City of Pomona | Pomona | Los Angeles |
| California | | Pomona | Pomona | |
| California | | City of Redlands | Redlands | San Bernardino |
| California | | Riverside | Riverside | Riverside |
| California | | City of Santa Barbara | Santa Barbara | Santa Barbara |
| California | | Santa Cruz Water Department | Santa Cruz | Santa Cruz |
| California | | San Francisco PUC | San Francisco | San Mateo |
| California | | Stockton | Stockton | San Joaquin |
| California | | Vallejo | Vallejo | |
| California | | Ventura | Ventura | |
| California | | Westminster | Westminster | Orange |
| California | | Castaic Lake Water Agency | Santa Clarita | |
| California | | Corona | Corona | Riverside |
| California | | Coachella Valley Water District | | Riverside |
| California | | Desert Water Agency | Palm Springs | Riverside |
| California | | East Bay MUD | Oakland | |
| California | | Eastern Municipal Water District | Perris | Riverside |
| California | | Estero Municipal Improvement District | Foster City | San Mateo |
| California | | Fresno | Fresno | |
| California | | Glendale Water and Power | Glendale | Los Angeles |
| California | | Great Oaks Water Company | San Jose | Santa Clara |
| California | | Helix Water District | La Mesa | San Diego |
| California | | Irvine Ranch Water District | Irvine | Orange |
| California | | Los Angeles | Los Angeles | Los Angeles |
| California | | Long Beach | Long Beach | |
| California | | Marin Municipal Water District | | Marin |
| California | | Mesa Consolidated Water District | Costa Mesa | Orange |
| California | | Moulton Niguel Water District | Laguna Niguel | Orange |
| California | | Monte Vista Water District | Montclair | San Bernardino |
| California | | Otay Water District | | San Diego |
| California | | Padre Dam Municipal Water District | Santee | San Diego |
| California | | Park Water Co. | Bellflower/Norwalk | Los Angeles |
| California | | Park Water Co. | Compton | Los Angeles |
| California | | Park Water Co. | Lynwood/Rancho Dominguez | Los Angeles |
| California | | Roseville | Roseville | Placer |
| California | | City of San Diego | San Diego | San Diego |
| California | | San Diego Water Dept. | San Diego | San Diego |
| California | | San Bernardino | San Bernardino | San Bernardino |
| California | | California Cities Water | Edna/Rolling Hills | San Luis Obispo |
| California | | California Cities Water | Los Osos | San Luis Obispo |
| California | | California Cities Water | Nipomo | San Luis Obispo |
| California | | California Cities Water | Orcutt | Santa Barbara |
| California | | California Cities Water | Santa Maria/Lake Marie | Santa Barbara |
| California | | California Cities Water | Santa Maria/Tanglewood | Santa Barbara |
| California | | Southern California Water Co--Artesia | Artesia | Los Angeles |
| California | | Southern California Water Co--Bell Gardens | Bell Gardens | Los Angeles |
| California | | Southern California Water Co--Culver City | Culver City | Los Angeles |
| California | | Southern California Water Co--Norwalk | Norwalk | Los Angeles |
| California | | Southern California Water Co--Placentia | Placentia | Orange |
| California | | Southern California Water Co--San Dimas | San Dimas | Los Angeles |
| California | | Southern California Water Co--South Arcadia | Arcadia | Los Angeles |
| California | | Southern California Water Co--South San Gabriel | San Gabriel | Los Angeles |
| California | | Southern California Water Co--West Orange | Cypress, Stanton, Los
Alamitos | Orange |
| California | | Southern California Water Co--Yorba Linda | Yorba Linda | Orange |
| California | | Southern California Water Co. | Apple Valley (Victorville
#1) | San Bernadino |
| California | | Southern California Water Co. | Barstow | San Bernadino |
| California | | Southern California Water Co. | Calipatria | Imperial |
| California | | Southern California Water Co. | Claremont | Los Angeles, San Bernardino |
| California | | Southern California Water Co. | Cowan Heights/Lemon Heights | Orange |
| California | | Southern California Water Co. | Gardena, Lawndale | Los Angeles |
| California | | Southern California Water Co. | Lucerne Valley (Victorville
#6) | San Bernadino |
| California | | Southern California Water Co. | Lucerne Valley (Victorville
#6) | San Bernardino |
| California | | Southern California Water Co. | Morongo | San Bernadino |
| California | | Southern California Water Co. | Niland | Imperial |
| California | | Southern California Water Co. | Ojai | Ventura |
| California | | Southern California Water Co. | Rancho Cordova | Sacramento |
| California | | Southern California Water Co. | Simi | Ventura |
| California | | Southern California Water Co. | Southgate | Los Angeles |
| California | | Southern California Water Co. | Vernon, Huntington Park | Los Angeles |
| California | | Southern California Water Co. | Willowbrook | Los Angeles |
| California | | Southern California Water Co. | Wrightwood | San Bernadino |
| California | | San Jose Water Co. | San Jose | |
| California | | County of San Luis Obispo Water Systems | | San Luis Obispo |
| California | | Lopez Project | Arroyo Grande | San Luis Obispo |
| California | | Soquel Creek Water District | | Santa Cruz |
| California | | Sunnyvale | Sunnyvale | Santa Clara |
| California | | Sweetwater Authority | | San Diego |
| California | | Torrance | Torrance | |
| California | | Vista Irrigation District | Vista | San Diego |
| California | | Vista Irrigation District | Vista | San Diego |
| California | | Zone 7 Water Agency | Pleasanton | |
| Colorado | | City of Victor | Victor | Teller |
| Colorado | | City of Arvada | Arvada | Jefferson |
| Colorado | | Aurora | Aurora | |
| Colorado | | Ft. Collins | Ft. Collins | Larimer |
| Colorado | | City of Greeley | Greeley | CO |
| Colorado | | Loveland Water and Power Dept. | Loveland | Larimer |
| Colorado | | Palmer Lake | Palmer Lake | El Paso |
| Colorado | | Colorado Springs Utilities | Colorado Springs | El Paso |
| Colorado | | Little Thompson Water District | | Larimer |
| Colorado | | Board of Water Works | Pueblo | Pueblo |
| Colorado | | Denver Water | Denver | Denver |
| Connecticut | | BHC Company | | Fairfield, New Haven, Litchfield |
| Connecticut | | Manchester Water Department | Manchester | Hartford |
| Connecticut | | Connecticut Water Company | | Hartford, Litchfield, Middlesex,
New Haven, New London,
Tolland |
| Connecticut | | Crystal Water Company | | Windham |
| Connecticut | | Gallup Water Service | | New London, Windham |
| Connecticut | | Unionville Water Company | Avon, Farmington | Hartford |
| Connecticut | | Norwalk Second Taxing District Water Dept. | Norwalk | Fairfield |
| Connecticut | | South Central Connecticut Regional Water Authority | | New Haven |
| Connecticut | | Metropolitan District Comm. | Hartford | Hartford |
| Delaware | | Artesian Water Co. | | Kent, New Castle, Sussex |
| Delaware | | Wilmington | Wilmington | New Castle |
| Delaware | | United Water Delaware | Willmington | New Castle |
| Delaware | | United Water | | New Castle |
| District of Columbia | | DC Water & Sewer Authority | Washington | |
| Florida | | Parkland Utilities, Inc. | Parkland | Broward |
| Florida | | Miami Dade Water | Miami | Dade |
| Florida | | Pinellas County Utilities | Clearwater | Pinellas |
| Florida | | Pinellas Co. Utilities | | Pinellas |
| Florida | | City of Titusville | Titusville | Brevard |
| Florida | | Ft. Lauderdale | Ft. Lauderdale | Broward |
| Florida | | Hialeah | Hialeah | Dade |
| Florida | | Tampa | Tampa | Hillsborough |
| Florida | | Clearwater Water System | Clearwater | Pinellas |
| Florida | | Cocoa | Cocoa | Brevard |
| Florida | | Manatee Co. | | Manatee |
| Florida | | Okaloosa Co. Water & Sewer | Ft. Walton Beach | Okaloosa |
| Florida | | Escambia Co. Utility Authority | Pensacola | Escambia |
| Florida | | Gainesville | Gainesville | Alachua |
| Florida | | Hillsborough Public Utilities | Tampa | Hillsborough |
| Florida | | Hillsborough | Hillsborough | Hillborough |
| Florida | | Hollywood | Hollywood | Broward |
| Florida | | JEA | Jacksonville | Duval |
| Florida | | Jupiter | Jupiter | Palm Beach |
| Florida | | Lakeland | Lakeland | Polk |
| Florida | | Lauderhill D.E.E.S. | Lauderhill | Broward |
| Florida | | Lee Co. Utilities | Fort Myers | Lee |
| Florida | | Melbourne | Melbourne | Brevard |
| Florida | | North Miami Beach | North Miami Beach | Dade |
| Florida | | Island Water Assoc. | Sanibel | Lee |
| Florida | | Villa Tasso | Niceville | Walton |
| Florida | | Orange County Utilities | Orlando | Orange |
| Florida | | City of Ormond Beach | Ormond Beach | Volusia |
| Florida | | Orlando Utilities Comm. | Orlando | Orange |
| Florida | | Palm Beach Co. | | Palm Beach |
| Florida | | Siesta Key Utilities Authority, Inc. | | Sarasota |
| Florida | | WDW Central | Lake Buena Vista | Orange |
| Florida | | St. Petersburg | St. Petersburg | Pinellas |
| Florida | | Seacoast Utility Authority | Palm Beach Gardens | Palm Beach |
| Florida | | Tallahassee | Tallahassee | Leon |
| Georgia | | DeKalb County | Decatur | Dekalb |
| Georgia | | DeKalb County | Stone Mountain | DeKalb |
| Georgia | | Atlanta | Atlanta | Fulton |
| Georgia | | Brunswick Water System | Brunswick | Glynn |
| Georgia | | Clayton Co. Water Authority | | Clayton |
| Georgia | | Augusta-Richmond Co | Augusta | Richmond |
| Georgia | | Austell Water System | Austell | Cobb |
| Georgia | | Butts County Water & Sewer Authority | Jackson | Butts |
| Georgia | | Savannah | Savannah | Chatham |
| Georgia | | Cobb County | | Cobb |
| Georgia | | North Fulton Co. | | Fulton |
| Georgia | | Gwinnett Co. Water | | Gwinnett |
| Georgia | | Columbus Water Works | Columbus | Muscogee |
| Georgia | | Dalton Utilities | Dalton | Whitfield |
| Georgia | | Gainesville Public Utilities Dept. | Gainesville | Hall |
| Georgia | | Macon Water Authority | Macon | Bibb |
| Hawaii | | Honolulu Board of Water Supply | Honolulu | Honolulu |
| Hawaii | | Maui Department of Water Supply | Maui And Molokai | Maui |
| Idaho | | United Water Idaho | Boise | Ada |
| Illinois | | Chicago | Chicago | Cook |
| Illinois | | City of Elgin | Elgin | Kane |
| Illinois | | City of Joliet | Joliet | Will |
| Illinois | | Aurora | Aurora | Kane |
| Illinois | | Rockford | Rockford | |
| Illinois | | Central Lake County Joint Action Water Agency | Lake Bluff | Lake |
| Illinois | | Univ. of Illinois | Urbana | Champaign |
| Illinois | | Illinois-American Water Co. | Cairo | Alexander |
| Illinois | | Illinois-American Water Co. | Pekin | Tazewell |
| Illinois | | Illinois-American Water Co. | Peoria | Peoria |
| Illinois | | Illinois-American Water Co. | Alton | Madison |
| Illinois | | Illinois-American Water Co. | East St. Louis | St. Clair |
| Illinois | | Illinois-American Water Co. | Granite City | Madison |
| Illinois | | Northern Illinois Water Corp. | Champaign | Champaign |
| Illinois | | Naperville | Naperville | Dupage |
| Illinois | | Village of Romeoville | Romeoville | Will |
| Illinois | | Springfield | Springfield | Sangamon |
| Illinois | | Island Lake | Island Lake | Lake |
| Indiana | | Frankfort Water Works | Frankfort | Clinton |
| Indiana | | Fort Wayne | Fort Wayne | Allen |
| Indiana | | City of Bloomington Utilities | Bloomington | Monroe |
| Indiana | | South Bend | South Bend | |
| Indiana | | Columbus City Utilities | Columbus | Bartholomew |
| Indiana | | Evansville Water Utility | Evansville | Vanderburgh |
| Indiana | | South Harrison Water Corp. | New Middletown | Harrison |
| Indiana | | Indiana-American Water Co., Inc. | Crawfordsville | Montgomery |
| Indiana | | Indiana-American Water Co., Inc. | Greenwood | Johnson |
| Indiana | | Indiana-American Water Co., Inc. | Jeffersonville | Clark |
| Indiana | | Indiana-American Water Co., Inc. | Kokomo | Howard |
| Indiana | | Indiana-American Water Co., Inc. | Muncie | Delaware |
| Indiana | | Indiana-American Water Co., Inc. | Newburgh | Warrick |
| Indiana | | Indiana-American Water Co., Inc. | Noblesville | Hamilton |
| Indiana | | Indiana-American Water Co., Inc. | Richmond | Wayne |
| Indiana | | Indiana-American Water Co., Inc. | Seymour | Jackson |
| Indiana | | Indiana-American Water Co., Inc. | Shelbyville | Shelby |
| Indiana | | Indiana-American Water Co., Inc. | Somerset | Wabash |
| Indiana | | Indiana-American Water Co., Inc. | Summitville | Madison |
| Indiana | | Indiana-American Water Co., Inc. | Terre Haute | Vigo |
| Indiana | | Indiana-American Water Co., Inc. | Wabash | Wabash |
| Indiana | | Indianapolis Water Co. | Indianapolis | Marion |
| Indiana | | Mishawaka Utilities | Mishawaka | St. Joseph |
| Iowa | | Cedar Rapids Water Dept. | Cedar Rapids | Linn |
| Iowa | | Ames | Ames | Story |
| Iowa | | Des Moines Water Works | Des Moines | Polk |
| Iowa | | Iowa-American Water Co. | Davenport | Scott |
| Iowa | | Clinton | Clinton | Clinton |
| Iowa | | Iowa City | Iowa City | Johnson |
| Iowa | | Muscatine Power & Water | Muscatine | Muscatine |
| Iowa | | North Liberty | North Liberty | Johnson |
| Iowa | | Pocahontas Municipal Utilities | Pocahontas | Pocahontas |
| Iowa | | Spencer | Spencer | Clay |
| Iowa | | Urbandale Water Dept. | Urbandale | Polk |
| Iowa | | West Des Moines Water Works | West Des Moines | Polk |
| Iowa | | Waterloo Water Works | Waterloo | Black Hawk |
| Kansas | | Kansas City BPU | Kansas City | Wyandotte |
| Kansas | | University of Kansas | Lawrence | Douglas |
| Kansas | | City of Olathe | Olathe | Johnson |
| Kansas | | Topeka | Topeka | Shawnee |
| Kansas | | Water District #1 Johnson Co. | Mission | Johnson |
| Kansas | | City of Wichita | Wichita | Sedgwick |
| Kentucky | | Bowling Green Municipal Utilities | Bowling Green | Warren |
| Kentucky | | Campbellsville | Campbellsville | Taylor |
| Kentucky | | Kentucky-American Water Company | Lexington | Fayette |
| Kentucky | | Louisville Water Company | Louisville | Jefferson |
| Kentucky | | N. Kentucky Water Service District | | Kenton |
| Kentucky | | Paducah Water Works | Paducah | McCracken |
| Louisiana | | Baton Rouge Water Company | Baton Rouge | East Baton Rouge |
| Louisiana | | Shreveport | Shreveport | Caddo |
| Louisiana | | E Jefferson WW Dist #1 | Jefferson | Jefferson |
| Louisiana | | W Jefferson WW Dist #2 | | Jefferson |
| Louisiana | | Lafaytette Utilities System | Lafayette | Lafayette |
| Louisiana | | Lafayette Utilities System | Lafayette | Lafayette |
| Louisiana | | New Orleans | New Orleans | Orleans |
| Maine | | Madison Water District | Madison | Somerset |
| Maine | | Augusta | Augusta | Kennebec |
| Maine | | Bangor | Bangor | Penobscot |
| Maine | | Bath Water District | Bath | Sagadahoc |
| Maine | | Hampden Water District | Hampden | Penobscot |
| Maine | | Portland Water District | Portland | Cumberland |
| Maine | | Sanford | Sanford | York |
| Maryland | | Anne Arundel | Glen Burnie-Broadneck | Anne Arundel |
| Maryland | | City of Annapolis | Annapolis | Anne Arundel |
| Maryland | | Frederick | Frederick | Frederick |
| Maryland | | Baltimore | Baltimore | |
| Maryland | | Cumberland | Cumberland | Allegany |
| Maryland | | Harford County Dept. of Public Works | | Harford |
| Maryland | | Howard County Dept. of Public Works | Columbia | Howard |
| Maryland | | Myersville | Myersville | Frederick |
| Maryland | | Trappe | Trappe | Talbot |
| Maryland | | Washington Suburban Sanitary Commission | | Montgomery, Prince George's |
| Massachusetts | | Lowell Regional Water Utility | Lowell | Middlesex |
| Massachusetts | | Westford | Westford | Middlesex |
| Massachusetts | | Auburn Water District | Auburn | Worcester |
| Massachusetts | | Cambridge Water Dept. | Cambridge | Middlesex |
| Massachusetts | | New Bedford | New Bedford | Bristol |
| Massachusetts | | Worcester | Worcester | Worcester |
| Massachusetts | | Clinton Water Dept. | Clinton | Worcester |
| Massachusetts | | Cohasset Water Department | Cohasset | Norfolk |
| Massachusetts | | Dighton Water District | Dighton | Bristol |
| Massachusetts | | Easton | Easton | Bristol |
| Massachusetts | | Hopkinton Water Dept. | Hopkinton | Middlesex |
| Massachusetts | | Marshfield | Marshfield | Plymouth |
| Massachusetts | | Boston Water & Sewer Comm. | Boston | Suffolk |
| Massachusetts | | Brookline Water & Sewer Comm. | Brookline | Norfolk |
| Massachusetts | | Mass. Water Resources Authority | | |
| Massachusetts | | Northampton Water Dept. | Northampton | Hampshire |
| Massachusetts | | North Andover Water Dept. | North Andover | Essex |
| Massachusetts | | North Brookfield Water Department | North Brookfield | Worcester |
| Massachusetts | | Provincetown | Provincetown | Barnstable |
| Massachusetts | | Taunton | Taunton | |
| Massachusetts | | Amherst DPW | Amherst | Hampshire |
| Massachusetts | | Barre | Barre | Worcester |
| Massachusetts | | Brewster Water Department | Brewster | Barnstable |
| Massachusetts | | Ipswich | Ipswich | Essex |
| Massachusetts | | Orleans Water Department | Orleans | Barnstable |
| Massachusetts | | Springfield Water & Sewer | Springfield | Hampden |
| Massachusetts | | Westborough Water Dep't | Westborough | Worcester |
| Michigan | | Battle Creek | Battle Creek | Calhoun |
| Michigan | | Flint | Flint | Genesee |
| Michigan | | Warren | Warren | Macomb |
| Michigan | | Ann Arbor | Ann Arbor | Washtenaw |
| Michigan | | Kalamazoo | Kalamazoo | Kalamazoo |
| Michigan | | Livonia | Livonia | Wayne |
| Michigan | | Saline | Saline | Washtenaw |
| Michigan | | Sterling Heights | Sterling Heights | Macomb |
| Michigan | | Wyoming | Wyoming | Kent |
| Michigan | | Detroit | Detroit | |
| Michigan | | Grand Rapids | Grand Rapids | Kent |
| Michigan | | Grand Haven | Grand Haven | Ottawa |
| Michigan | | Holland Board of Public Works | Holland | Ottawa |
| Michigan | | Lansing Board of Water & Light | Lansing | Ingham |
| Michigan | | Marine City Water Works | Marine City | St. Clair |
| Michigan | | Saginaw Water Treatment Plant | Saginaw | Saginaw |
| Michigan | | St. Joseph Water | St. Joseph | Berrien |
| Michigan | | Waterford | Waterford | Oakland |
| Minnesota | | Minneapolis | Minneapolis | Hennepin |
| Minnesota | | St. Paul | St. Paul | Ramsey |
| Minnesota | | Paynesville | Paynesville | Stearns |
| Mississippi | | Jackson | Jackson | Hinds |
| Missouri | | St Louis | St Louis | |
| Missouri | | City Utilities | Springfield | Greene |
| Missouri | | Independence | Independence | Jackson |
| Missouri | | Kirkwood | Kirkwood | St Louis |
| Missouri | | Chillicothe Utilities | Chillicothe | Livingstone |
| Missouri | | Missouri Annual Compliance Reports | All | All |
| Missouri | | Columbia | Columbia | Boone |
| Missouri | | Jackson Co. Public Water Supply District #1 | Grandview | Jackson |
| Missouri | | Kansas City | Kansas City | Jackson |
| Missouri | | Carthage Water and Electric | Carthage | Jasper |
| Missouri | | City of Neosho | Neosho | Newton |
| Missouri | | Ozark | Ozark | Christian |
| Montana | | Billings | Billings | Yellowstone |
| Montana | | Mountain Water Company | Missoula | Missoula |
| Montana | | City of Great Falls | Great Falls | Cascade |
| Montana | | Libby | Libby | Lincoln |
| Nebraska | | Lincoln | Lincoln | Lancaster |
| Nebraska | | Metropolitan Utilities District | Omaha | Douglas, Sarpy, Washington |
| Nevada | | Henderson | Henderson | Clark |
| Nevada | | Las Vegas Valley Water Dist. | Las Vegas | Clark |
| Nevada | | Nellis AFB | Nellis Afb | Clark |
| Nevada | | Sierra Pacific | | Washoe |
| Nevada | | North Las Vegas Utilities | N. Las Vegas | Clark |
| New Hampshire | | Manchester Water Works | Manchester | Merrimack |
| New Hampshire | | Concord Water Supply | Concord | Merrimack |
| New Hampshire | | Pennichuck Water Works | Nashua | Hillsborough |
| New Jersey | | Trenton Water Works | Trenton City | Mercer |
| New Jersey | | Bayonne MUA | Bayonne City | Hudson |
| New Jersey | | Beachwood | Beachwood | Ocean |
| New Jersey | | Brick Township Municipal Utilities Authority | Brick | Ocean |
| New Jersey | | Newark Water Dept. | Newark | |
| New Jersey | | Elizabethtown Water Co. | | Union |
| New Jersey | | Middlesex Water Co | Edison | Midlesex |
| New Jersey | | New Jersey-American Water Co. | Atlantic County | Atlantic |
| New Jersey | | New Jersey-American Water Co. | Belvidere, Oxford,
Washington | Warren |
| New Jersey | | New Jersey-American Water Co. | Cape May Court House Area | Cape May |
| New Jersey | | New Jersey-American Water Co. | Delaware Valley | Camden, Burlington |
| New Jersey | | New Jersey-American Water Co. | Frenchtown Area | Hunterdon |
| New Jersey | | New Jersey-American Water Co. | International Trade Center | Morris |
| New Jersey | | New Jersey-American Water Co. | Jamesburg Area | Middlesex |
| New Jersey | | New Jersey-American Water Co. | Lakewood Area | Ocean |
| New Jersey | | New Jersey-American Water Co. | Little Falls Area | Passaic |
| New Jersey | | New Jersey-American Water Co. | Logan & Woolwich Townships | Gloucester |
| New Jersey | | New Jersey-American Water Co. | Ocean City | Cape May |
| New Jersey | | New Jersey-American Water Co. | Short Hills Area | Essex, Morris, Somerset |
| New Jersey | | New Jersey-American Water Co. | Strathmere | Cape May |
| New Jersey | | New Jersey-American Water Co. | Sunbury Village | Burlington |
| New Jersey | | New Jersey-American Water Co. | Union Beach | Monmouth |
| New Jersey | | New Jersey-American Water Co. | West Jersey | Morris |
| New Jersey | | | Monmouth County | Monmouth |
| New Jersey | | Passaic Valley Water Commisssion | Totowa | Passaic |
| New Jersey | | United Water Jersey City | Jersey City | Hudson |
| New Jersey | | United Water/Hoboken Water | Hoboken | Hudson |
| New Jersey | | United Water New Jersey | | Bergen, Hudson |
| New Jersey | | United Water Lambertville | Lambertville | Hunterdon |
| New Jersey | | United Water Toms River | Toms River | Ocean |
| New Mexico | | Albuquerque Water Utility | Albuquerque | Bernalillo |
| New Mexico | | New Mexico-American Water Co. | Clovis | Curry |
| New Mexico | | Sandia Peak Utility Company | Albuquerque | Bernalillo |
| New Mexico | | Desert Sands MDWCA | Anthony/Berino | Dona Ana |
| New York | | Auburn | Auburn | Cayuga |
| New York | | Helen Hays Hospital | West Haverstraw | Rockland |
| New York | | Hempstead | Hempstead | |
| New York | | Albany | Albany | Albany |
| New York | | Yonkers | Yonkers | Westchester |
| New York | | Buffalo Water Authority | Buffalo | Erie |
| New York | | Mount Vernon Board of Water Supply | Mount Vernon | Westchester |
| New York | | NYC Dept. of Environmental Protection | New York | |
| New York | | Rochester | Rochester | Monroe |
| New York | | Hyde Park | Hyde Park | Dutchess |
| New York | | Staatsburg | Staatsburg | Dutchess |
| New York | | Erie Co. Water Authority | | Erie |
| New York | | Greenburgh Consold. Water Dist. No. 1 | Greenburgh | Westchester |
| New York | | Long Island Water Corp. | | Nassau |
| New York | | Monroe Co. Water Authority | | Monroe |
| New York | | NY Water Service Corp. | | Nassau |
| New York | | Onondaga County Water Authority | Central NY | Onondaga
Oswego
Madison
Oneida |
| New York | | Oneida | Oneida | Madison |
| New York | | Village of Oneida Castle | Oneida Castle | Oneida |
| New York | | Poughkeepsie Water | Poughkeepsie | Dutchess |
| New York | | Suffolk Co. Water Authority | | Suffolk |
| New York | | Syracuse City | Syracuse | Onondaga |
| New York | | Glenville | Glenville | Schenectady |
| New York | | Upper Mohawk Valley | Oswego | |
| New York | | United Water New Rochelle | New Rochelle | Westchester |
| New York | | United Water Nicols | Nicols | Tioga |
| New York | | United Water Owego | Owego | Tioga |
| New York | | United Water New York | | Rockland |
| New York | | Wellsville Water Department | Wellsville | Allegany |
| New York | | Westchester Joint Water Works | Mamaroneck, Harrison | Westchester |
| North Carolina | | Town of Clayton | Clayton | Johnston |
| North Carolina | | Town of Apex | Apex | Wake |
| North Carolina | | Asheville-Buncombe | Asheville | Buncombe |
| North Carolina | | Durham | Durham | Durham |
| North Carolina | | Salisbury WTP | Salisbury | Rowan |
| North Carolina | | Winston-Salem | Winston-Salem | Forsyth |
| North Carolina | | Charlotte-Mecklenburg Utilities | Charlotte | Mecklenburg |
| North Carolina | | Davidson Water Inc | Welcome | Davidson |
| North Carolina | | Fayetteville Public Works Commission | Fayetteville | Cumberland |
| North Carolina | | Greensboro | Greensboro | |
| North Carolina | | Harnett Co. Dept. of Public Utilities | Lillington | Harnett |
| North Carolina | | Orange Water and Sewer Authority | Carrboro | Orange |
| North Carolina | | Raleigh | Raleigh | Wake |
| North Dakota | | Grand Forks | Grand Forks | Grand Forks |
| North Dakota | | McLean-Sheridan Rural Water | Turtle Lake | McLean/Sheridan |
| North Dakota | | Southwest Water Authority | Dickinson | Stark |
| North Dakota | | Traill Rural Water | Clifford | Traill |
| Ohio | | Butler County Department of Environmental Services | | Butler |
| Ohio | | Akron | Akron | Summit |
| Ohio | | Columbus | Columbus | Franklin |
| Ohio | | Cincinnati Water Works | Cincinnati | Hamilton |
| Ohio | | St. Marys | St. Marys | Auglaize |
| Ohio | | Canton | Canton | Stark |
| Ohio | | Dept. of Water | Dayton | Montgomery |
| Ohio | | Toledo | Toledo | |
| Ohio | | Cleveland | Cleveland | Cuyahoga |
| Ohio | | Montgomery Co. | | Montgomery |
| Ohio | | Greenfield | Greenfield | Highland |
| Ohio | | Newark | Newark | Licking |
| Ohio | | Stow Public Water | Stow | Summit |
| Ohio | | Upper Sandusky Water Dept. | Upper Sandusky | Wyandot |
| Ohio | | Youngstown | Youngstown | Mahoning |
| Oklahoma | | Lawton | Lawton | Comanche |
| Oklahoma | | Oklahoma City | Oklahoma City | Oklahoma |
| Oklahoma | | Tulsa | Tulsa | Tulsa |
| Oregon | | Albany | Albany | Linn |
| Oregon | | Hopewell Water Company | Salem | Yamhill |
| Oregon | | Salem Public Works Department | Salem | Marion |
| Oregon | | Corvallis | Corvallis | Benton |
| Oregon | | Junction City | Junction City | Lane |
| Oregon | | Lebanon | Lebanon | Linn |
| Oregon | | Lebanon | Lebanon | Linn |
| Oregon | | Wilsonville | Wilsonville | Clackamas |
| Oregon | | Eugene Water and Electric Board | Eugene | Lane |
| Oregon | | Medford Water Commission | Medford | Jackson |
| Oregon | | Suburban East Salem Water District | Salem | Marion |
| Oregon | | Pendleton | Pendleton | Umatilla |
| Oregon | | Reedsport | Reedsport | Douglas |
| Oregon | | Tualatin Valley Water District | | Washington |
| Oregon | | Portland Bureau of Water Works | Portland | Multnomah |
| Pennsylvania | | Elverson Water Company | Elverson | Chester |
| Pennsylvania | | Wilkinsburg-Penn Joint Water Authority | Eastern Suburbs | Allegheny |
| Pennsylvania | | City of Bethlehem | Bethlehem | Northampton |
| Pennsylvania | | Chester Water Authority | Chester | Chester |
| Pennsylvania | | City of Lancaster | Lancaster | Lancaster |
| Pennsylvania | | Lewistown Boro Municipal Authority | Lewistown | Mifflin |
| Pennsylvania | | Erie City Water Authority | Erie | Erie |
| Pennsylvania | | Lehigh County Authority | | Lehigh County |
| Pennsylvania | | London Grove Township Municipal Authority | West Grove | Chester |
| Pennsylvania | | Emmaus Borough Water System | Emmaus | Lehigh |
| Pennsylvania | | Hellertown Borough Authority | Hellertown | Northampton |
| Pennsylvania | | Lehigh Co. Authority | Allentown | Lehigh |
| Pennsylvania | | Northampton Borough | Northampton | Northampton |
| Pennsylvania | | Upper Saucon Township | Center Valley | Lehigh |
| Pennsylvania | | Slatington | Slatington | Lehigh |
| Pennsylvania | | Allentown | Allentown | Lehigh |
| Pennsylvania | | Whitehall Township Authority | Whitehall | Lehigh |
| Pennsylvania | | Municipal Authority of Westmoreland Co. | | Westmoreland |
| Pennsylvania | | Meadville Housing Corp - Northgate | Meadville | Crawford |
| Pennsylvania | | Muhlenberg Township | Reading | Berks |
| Pennsylvania | | North Wales Water Authority | | Bucks |
| Pennsylvania | | North Wales Water Authority | | Montgomery |
| Pennsylvania | | Pennsylvania American Water Co. | Lake Scranton | Lackawanna |
| Pennsylvania | | Pennsylvania American Water Co. | Pittsburgh | Allegheny |
| Pennsylvania | | Pittsburgh | Pittsburgh | Allegheny |
| Pennsylvania | | Philadelphia Water Department | Philadelphia | Philadelphia |
| Pennsylvania | | Philadelphia Water Department | Philadelphia | Philadelphia |
| Pennsylvania | | Philadelphia Suburban | | Montgomery |
| Pennsylvania | | Tobyhanna Army Depot | Tobyhanna | Monroe |
| Pennsylvania | | United Water Bethel | Bethel | Delaware |
| Pennsylvania | | United Water Pennslyvania-Noxen | Noxen | Wyoming |
| Pennsylvania | | United Water Pennslyvania-Shavertown | Shavertown | Luzerne |
| Pennsylvania | | United Water Pennsylvania-Bloomsburg | Bloomsburg | Columbia |
| Pennsylvania | | United Water Pennsylvania-CCIP | Columbia | Lancaster |
| Pennsylvania | | United Water Pennsylvania-Center Square | Mechanicsburg | Cumberland |
| Pennsylvania | | United Water Pennsylvania-Dallas | Dallas | Luzerne |
| Pennsylvania | | United Water Pennsylvania-Grantham | Mechanicsburg | Cumberland |
| Pennsylvania | | United Water Pennsylvania-Harvey's Lake | Harvey's Lake | Luzerne |
| Pennsylvania | | United Water Pennsylvania-Mechanicsburg | Mechanicsburg | Cumberland |
| Pennsylvania | | United Water Pennsylvania-Newberry | Newberry | Lycoming |
| Pennsylvania | | United Water Pennsylvania-Nuremberg | Nuremberg | Luzerne |
| Pennsylvania | | Warrington Township | Warrington | Bucks |
| Pennsylvania | | York Water Co. | York | York |
| Rhode Island | | All Small Community Water Suppliers | | |
| Rhode Island | | Woonsocket Water Department | Woonsocket | Providence |
| Rhode Island | | East Providence | East Providence | Providence |
| Rhode Island | | City of Newport | Newport | Newport |
| Rhode Island | | Naval Station Newport | Newport | Newport |
| Rhode Island | | United States Navy (Fort Adams) | Newport | Newport |
| Rhode Island | | Portsmouth Water and Fire District | Portsmouth | Newport |
| Rhode Island | | Providence Water | Providence | |
| Rhode Island | | Pawtucket | Pawtucket | Providence |
| Rhode Island | | Pawtucket | Pawtucket | |
| Rhode Island | | University of Rhode Island | South Kingston | Washington |
| South Carolina | | Beaufort-Jasper Water & Sewer Authority | Beaufort | Beaufort & Jasper |
| South Carolina | | Charleston CPW | Charleston | Charleston |
| South Carolina | | Columbia | Columbia | Richland |
| South Carolina | | Greenville Water System | Greenville | Greenville |
| South Carolina | | Spartanburg Water System | Spartanburg | Spartanburg |
| South Dakota | | City of Madison | Madison | Lake |
| South Dakota | | Rapid City | Rapid City | Pennington |
| South Dakota | | Sioux Falls | Sioux Falls | Minnehaha |
| Tennessee | | Dunlap Water System | Dunlap | Sequatchie |
| Tennessee | | Alcoa Water Quality Services | Alcoa | Blount |
| Tennessee | | Millington Water Department | Millington | Shelby |
| Tennessee | | Clarksville Water Dept. | Clarksville | Montgomery |
| Tennessee | | City of Crossville | Crossville | Cumberland |
| Tennessee | | Duck River Utility Commission | Manchester | Coffee |
| Tennessee | | Manchester Water Dept. | Manchester | Coffee |
| Tennessee | | Knoxville Utilities Board | Knoxville | Knox |
| Tennessee | | Memphis Light, Gas & Water | Memphis | Shelby |
| Tennessee | | Nashville | Nashville | Davidson |
| Tennessee | | Tennessee-American Water Co. | Chattanooga | Hamilton |
| Tennessee | | Smyrna Water System | Smyrna | Rutherford |
| Texas | | Fort Worth Water Dept. | Fort Worth | Tarrant |
| Texas | | Lubbock | Lubbock | Lubbock |
| Texas | | Abilene | Abilene | Taylor |
| Texas | | Brownsville Public Utilities Board | Brownsville | Cameron |
| Texas | | Beaumont Water Util Dept | Beaumont | Jefferson |
| Texas | | Laredo | Laredo | Webb |
| Texas | | City of Lewisville | Lewisville | Denton |
| Texas | | Mesquite | Mesquite | Dallas |
| Texas | | City of Alpine | Alpine | Brewster |
| Texas | | Amarillo Municipal Water System | Amarillo | Potter |
| Texas | | Arlington | Arlington | Tarrant |
| Texas | | Austin | Austin | Travis |
| Texas | | Corpus Christi | Corpus Christi | Nueces |
| Texas | | Garland | Garland | Dallas |
| Texas | | Grapevine | Grapevine | Tarrant |
| Texas | | City of Huntsville | Huntsville | Walker |
| Texas | | Irving | Irving | Dallas |
| Texas | | Killeen | Killeen | Bell |
| Texas | | Odessa | Odessa | Ector |
| Texas | | City of Paris | Paris | Lamar |
| Texas | | Pasadena | Pasadena | Harris |
| Texas | | Wichita Falls | Wichita Falls | Wichita |
| Texas | | College Station Utilities | College Station | Brazos |
| Texas | | Dallas Water Utility | Dallas | Dallas |
| Texas | | City of Anthony | Anthony | El Paso |
| Texas | | El Paso Water Utilities | El Paso | El Paso |
| Texas | | Grand Prairie | Grand Prairie | Dallas |
| Texas | | City of Keller | Keller | Tarrant |
| Texas | | Lampasas Public Utilities | Lampasas | Lampasas |
| Texas | | McAllen | Mcallen | Hidalgo |
| Texas | | Plano | Plano | Collins |
| Texas | | Houston DPW | Houston | Harris |
| Texas | | San Antonio Water | San Antonio | Bexar |
| Texas | | Tyler | Tyler | Smith |
| Texas | | Waco | Waco | Mclennan |
| Utah | | Dixie Deer SSD | Central | Washington |
| Utah | | Salt Lake City Water | Salt Lake City | Salt Lake |
| Utah | | Central Utah WCD | Ashley Valley | Uintah |
| Utah | | Central Utah WCD | Duschene | Duschene |
| Utah | | Central Utah WCD | Orem, Provo | Utah |
| Utah | | Jordan Valley WCD | | Salt Lake |
| Utah | | Kearns Improvement District | | Salt Lake |
| Utah | | Provo | Provo | Utah |
| Utah | | St George | St George | Washington |
| Utah | | South Jordan City | South Jordan City | Salt Lake |
| Utah | | Weber Basin Water Conservancy District | | Davis |
| Virginia | | Ft. Monroe | Ft. Monroe | |
| Virginia | | Big Stone Gap | Big Stone Gap | Wise |
| Virginia | | Chesapeake | Chesapeake | |
| Virginia | | Falls Church | Falls Church | Fairfax |
| Virginia | | Richmond | Richmond | |
| Virginia | | Arlington County Water & Sewer Division | Arlington | Arlington |
| Virginia | | Chesterfield | Chesterfield | Chesterfield |
| Virginia | | Gloucester Co. Public Utilities | Gloucester | Gloucester |
| Virginia | | City-County-Contract | | Henrico |
| Virginia | | Roanoke Co. Utility Dept. | | Roanoke |
| Virginia | | Fairfax Co. Water Authority | | Fairfax |
| Virginia | | Occoquan-Woodbridge-Dumfries Triangle | | Prince William |
| Virginia | | Newport News | Newport News | Newport News |
| Virginia | | Norfolk | Norfolk | Norfolk |
| Virginia | | Portsmouth | Portsmouth City | |
| Virginia | | Roanoke | Roanoke | |
| Virginia | | Town of Broadway | Broadway | Rockingham |
| Virginia | | Town of Herndon, VA. | Herndon | Fairfax |
| Virginia | | Virginia-American Water Company | Dale City | Prince William |
| Virginia | | Virginia-American Water Co. | Alexandria | Fairfax |
| Virginia | | Virginia Beach | Virginia Beach | |
| Washington | | Kirkland | Kirkland | King |
| Washington | | Alderwood Water District | Lynnwood | Snohomish |
| Washington | | Coal Creek Utility District | Newcastle | King |
| Washington | | Bellevue | Bellevue | King |
| Washington | | Kennewick | Kennewick | Benton |
| Washington | | Lynnwood | Lynnwood | Snohomish |
| Washington | | Redmond | Redmond | King |
| Washington | | Renton | Renton | King |
| Washington | | Seattle Public Utilities | Seattle | King |
| Washington | | Tacoma | Tacoma | Pierce |
| Washington | | City of Vancouver | Vancouver | Clark |
| Washington | | Walla Walla Water Division | Walla Walla | Walla Walla |
| Washington | | Everett | Everett | Snohomish |
| Washington | | Highline Water District | Highline | King |
| Washington | | Lake Haven | Lake Haven | King |
| Washington | | Shoreline Water District | Shoreline, Lake Forest Park | King |
| Washington | | Spokane | Spokane | |
| West Virginia | | Clarksburg Water Board | Clarksburg | Harrison |
| West Virginia | | Weirton | Weirton | Brooke |
| West Virginia | | West Virginia-American Water Co. | Charleston | Kanawha |
| Wisconsin | | Wautoma Public Water Utility | Wautoma | Waushara |
| Wisconsin | | Madison Water Utility | Madison | Dane |
| Wisconsin | | Milwaukee Water Works | Milwaukee | Milwaukee |
| Wyoming | | Jackson | Jackson | Teton |
| Wyoming | | Gillette | Gillette | Campbell |