Key Issues > Water Quality
![environment icon, source: Art Explosion](https://webharvest.gov/congress114th/20161108193237im_/http://www.gao.gov/images/rip/environment.jpg)
Water Quality
Safe and clean water is necessary for human and environmental health and economic well-being. Over the last 40 years, the nations water quality and drinking water have improved, but threats to water quality and safety remain. For example, EPA and states have identified almost 39,000 water bodies nationwide that are considered impaired by pollutants so that they do not meet water quality standards set by the states or EPA.
EPA has broad responsibility for ensuring clean and safe water through implementation of the Safe Drinking Water Act (SDWA) and the Clean Water Act (CWA).
- Under the authorities in SDWA, EPA establishes legally enforceable standards that generally limit the levels of specific contaminants in drinking water that can adversely affect public health. Public water systems must meet these health-based requirements and comply with monitoring, reporting, and other requirements established by EPA and responsible states. A key information source for EPA regarding water system compliance with SDWA is data provided by the states.
- Under the structure of the CWA, EPA and states share responsibility for protecting water quality. States play a key role in managing water pollution from diffuse, or nonpoint sourcessuch as runoff from farms or construction siteswhich is the leading cause of impairment of the nations waters. In addition, under the CWA, EPA awards federal funds to states to implement nonpoint source management programs. EPA also implements regulatory programs to reduce pollution from point sources, such as industrial plants, wastewater plants and municipal stormwater runoff. These sources are regulated through National Pollutant Discharge Elimination System permits and technological and water-quality based limits in those permits.
- EPA has also taken on large-scale watershed restoration efforts, such as those in the Chesapeake Bay and Great Lake regions. These efforts involve protecting aquatic ecosystems and wetlands in these important geographic areas.
- The CWA and SDWA State Revolving Fund programs help states provide financing to address capital needs for building and upgrading wastewater and drinking water treatment systems and improving water quality.
For more on GAO's reports and recommendations, see the key reports tab above.
Looking for our recommendations? Click on any report to find each associated recommendation and its current implementation status.
Rural Water Infrastructure: Federal Agencies Provide Funding but Could Increase Coordination to Help Communities [Reissued on November 6, 2015]
GAO-15-450T: Published: Feb 27, 2015. Publicly Released: Feb 27, 2015.
http://gao.gov/products/GAO-15-450T
GAO-15-450T: Published: Feb 27, 2015. Publicly Released: Feb 27, 2015.
Drinking Water: EPA Program to Protect Underground Sources from Injection of Fluids Associated with Oil and Gas Production Needs Improvement
GAO-14-555: Published: Jun 27, 2014. Publicly Released: Jul 28, 2014.
http://gao.gov/products/GAO-14-555
GAO-14-555: Published: Jun 27, 2014. Publicly Released: Jul 28, 2014.
Drinking Water: EPA Has Improved Its Unregulated Contaminant Monitoring Program, but Additional Action Is Needed
GAO-14-103: Published: Jan 9, 2014. Publicly Released: Feb 10, 2014.
http://gao.gov/products/GAO-14-103
GAO-14-103: Published: Jan 9, 2014. Publicly Released: Feb 10, 2014.
Clean Water Act: Changes Needed If Key EPA Program Is to Help Fulfill the Nation's Water Quality Goals
GAO-14-80: Published: Dec 5, 2013. Publicly Released: Jan 13, 2014.
http://gao.gov/products/GAO-14-80
GAO-14-80: Published: Dec 5, 2013. Publicly Released: Jan 13, 2014.
Water Infrastructure: Approaches and Issues for Financing Drinking Water and Wastewater Infrastructure
GAO-13-451T: Published: Mar 13, 2013. Publicly Released: Mar 13, 2013.
http://gao.gov/products/GAO-13-451T
GAO-13-451T: Published: Mar 13, 2013. Publicly Released: Mar 13, 2013.
More Reports
Environmental Protection Agency: Status of Efforts to Address Nonpoint Source Water Pollution through the Section 319 Program
GAO-16-697R: Published: Jul 14, 2016. Publicly Released: Jul 14, 2016.
http://gao.gov/products/GAO-16-697R
GAO-16-697R: Published: Jul 14, 2016. Publicly Released: Jul 14, 2016.
Environmental Protection: Status of GAO Recommendations to EPA
GAO-16-722T: Published: Jun 14, 2016. Publicly Released: Jun 14, 2016.
http://gao.gov/products/GAO-16-722T
GAO-16-722T: Published: Jun 14, 2016. Publicly Released: Jun 14, 2016.
Great Lakes Restoration Initiative: Improved Data Collection and Reporting Would Enhance Oversight
GAO-15-526: Published: Jul 21, 2015. Publicly Released: Jul 30, 2015.
http://gao.gov/products/GAO-15-526
GAO-15-526: Published: Jul 21, 2015. Publicly Released: Jul 30, 2015.
Missouri River Flood and Drought: Experts Agree the Corps Took Appropriate Action, Given the Circumstances, but Should Examine New Forecasting Techniques
GAO-14-741: Published: Sep 12, 2014. Publicly Released: Sep 12, 2014.
http://gao.gov/products/GAO-14-741
GAO-14-741: Published: Sep 12, 2014. Publicly Released: Sep 12, 2014.
Environmental Regulation: EPA Should Improve Adherence to Guidance for Selected Elements of Regulatory Impact Analyses
GAO-14-519: Published: Jul 18, 2014. Publicly Released: Aug 11, 2014.
http://gao.gov/products/GAO-14-519
GAO-14-519: Published: Jul 18, 2014. Publicly Released: Aug 11, 2014.
Coastal Zone Management: Opportunities Exist for NOAA to Enhance Its Use of Performance Information
GAO-14-592: Published: Jul 16, 2014. Publicly Released: Jul 16, 2014.
http://gao.gov/products/GAO-14-592
GAO-14-592: Published: Jul 16, 2014. Publicly Released: Jul 16, 2014.
Funding for 10 States' Programs Supported by Four Environmental Protection Agency Categorical Grants
GAO-13-504R: Published: May 6, 2013. Publicly Released: May 21, 2013.
http://gao.gov/products/GAO-13-504R
GAO-13-504R: Published: May 6, 2013. Publicly Released: May 21, 2013.
Water Quality: EPA Faces Challenges in Addressing Damage Caused by Airborne Pollutants
GAO-13-39: Published: Jan 24, 2013. Publicly Released: Feb 25, 2013.
http://gao.gov/products/GAO-13-39
GAO-13-39: Published: Jan 24, 2013. Publicly Released: Feb 25, 2013.
Energy-Water Nexus: Coordinated Federal Approach Needed to Better Manage Energy and Water Tradeoffs
GAO-12-880: Published: Sep 13, 2012. Publicly Released: Oct 15, 2012.
http://gao.gov/products/GAO-12-880
GAO-12-880: Published: Sep 13, 2012. Publicly Released: Oct 15, 2012.
Water Pollution: EPA Has Improved Its Review of Effluent Guidelines but Could Benefit from More Information on Treatment Technologies
GAO-12-845: Published: Sep 10, 2012. Publicly Released: Oct 10, 2012.
More...http://gao.gov/products/GAO-12-845
GAO-12-845: Published: Sep 10, 2012. Publicly Released: Oct 10, 2012.
There are no other materials currently linked to this content