We publish laboratory analytical methods that are used by industries
and municipalities to analyze the chemical and biological components of
wastewater, drinking water, sediment, and other environmental samples
that are required by regulations under the authority of the Clean Water
Act (CWA) and the Safe Drinking Water Act (SDWA). Almost all of these
methods are published as regulations at Title 40 of the Code of Federal
Procedures for Detection and Quantitation
- Notice of Document Availability, Proposed Rule Withdrawal, and Feasibility
of a Potential Stakeholder Process (November 1, 2004)
Guidelines Establishing Test Procedures
for the Analysis of Pollutants Under the Clean Water Act; National Primary
Drinking Water Regulations; and National Secondary Drinking Water Regulations;
Analysis, Sampling, and Monitoring Procedures; Proposed Rule (April
Methods for Biological Pollutants in
Ambient Water; Final Rule (July 21, 2003)
(Oil and Grease) Frequently Asked Questions (updated April 1, 2003)
Whole Effluent Toxicity (WET) Methods
Final regulation concerning the use of whole effluent toxicity test methods
to protect aquatic life in National Pollutant Discharge Elimination System
data gathering and compliance monitoring under the Clean Water Act.
Method 1631: Guidelines
Establishing Test Procedures for the Analysis of Pollutants; Measurement
of Mercury in Water
This method allows for the determination of mercury at a minimum level
of 0.5 parts-per-trillion and supports measurements for mercury published
in the National Toxics Rule and in the Final Water Quality Guidance for
the Great Lakes System.
EPA Clarifies that Ferric Ferrocyanide is one of the "Cyanides"
in the Clean Water Act's List of Toxic Pollutants
Guidelines Establishing Test Procedures for the Analysis of Pollutants
Under the Clean Water Act; National Primary Drinking Water Regulations;
and National Secondary Drinking Water Regulations; Methods Update; Final
Rule. (October 23, 2002)
Updated versions of analytical methods developed by the American Society
for Testing Materials, Standard Methods, AOAC International, the USGS,
and the Department of Energy for use in CWA and SDWA compliance monitoring
for Organic Chemical Analysis
This collection contains Methods 601 - 613, 624, 625, 1624, 1625.
Evaluation of Dredged
Material Proposed for Discharge in Waters of the U.S. - Testing Manual
Membrane Filter Test Method for Enterococci in Water
Provides a direct count of bacteria in water based on the development
of colonies on the surface of the membrane filter. A water sample is filtered
through the membrane which retains the bacteria and the membrane containing
the bacterial cells is placed on a selective medium, mEI agar, and incubated.
Analysis of Dioxins and Furans in Wastewater
Extends minimum levels of quantitation of chlorine-substituted dibenzo-p-dioxins
and dibenzofurans (CDDs/CDFs) into the low parts-per-quadrillion range
for aqueous matrices and the low parts-per-trillion range for solid matrices.
The method specifies the use of HRGC/HRMS for detection and quantitation
Method 1622: Cryptosporidium
in Water by Filtration/IMS/FA
Describes the Method used to reliably determine the presence of Cryptosporidium
at low concentrations. Distribution of the document at this time allows
utilities, laboratories and others to obtain a first hand understanding
of how this new method works.
Method 1623: Cryptosporidium
and Giardia in Water by Filtration/IMS/FA (PDF, 1.2MB)
A performance-based method applicable to the determination of Cryptosporidium
and Giardia in aqueous matrices. (April 2001)
N-Hexane Extractable Material (HEM) and Silica Gel Treated N-Hexane Extractable
Material (SGT-HEM) by Extraction and Gravimetry (Oil and Grease and Total
Final regulations will replace Freon-113 with n-hexane as a solvent in
laboratory methods that test for the presence of oil and grease and total
petroleum hydrocarbons in wastewater discharges. This will reduce the
amount of chloroflourocarbons (CFCs) that are released to the atmosphere.
Available Cyanide by Flow Injection with Ligand Exchange
A method to accurately measure available cyanide in wastewater through
use of a ligand exchange/flow injection technique. This final rule amends
the Guidelines Establishing Test Procedures for the Analysis of Pollutants
under section 304(h) of the Clean Water Act to augment currently approved
cyanide test procedures.
Guidelines and Format
for Methods to be Proposed at 40 CFR Part 136 or Part 141
These proposed guidelines have been prepared to promote consistency among
analytical methods and to streamline the method promulgation process.
This document is presented in four sections that describe standard elements
that must be included in the method, required method format, conventions
to be used when preparing the method, and required method content.
Methods for Sampling
and Analyzing Contaminants in Fish and Shellfish Tissue
Provides overall guidance on methods for sampling and analyzing contaminants
in fish and shellfish. This guidance was developed to promote consistency
in data states use in issuing fish consumption advisories.
Streamlining Test Methods Approval Program
Water Pollution and Water
Supply Study Performance
Twice a year from 1993 to 1999, water supply studies were conducted for
drinking water and wastewater to help ensure high quality performance
by environmental laboratories. These documents describe the studies and
provide analyte and method-specific regressions fitting to precision and
bias statistics that were developed from the data in the studies.
Lake Michigan Mass Balance
Describes the sampling and analytical methods used in the Lake Michigan
Mass Balance Study Methods Compendium. The compendium is organized into
three volumes that describe sampling procedures used in the study and
analytical procedures used by the Principal Investigators.
Alternate Test Procedures
Both the Clean Water and Safe Drinking Water Acts require that we approve
methods for measuring substances in wastewater and drinking water. EPA-approved
methods are listed in the Code of Federal Regulations at 40 CFR
part 136 for wastewater and at 40 CFR part 141 for drinking water. In
addition, people or companies may ask that EPA approve a new method or
an alternate test procedure (ATP). EPA encourages the development of new
methods and ATPs to improve performance, reduce complexity and costs,
decrease hazardous materials in the laboratory, and better protect human
health and the environment. While the following ATPs were not issued as
federal requirements, they are helpful guidance for laboratories.
EPA Microbiological Alternate Test Procedure
(ATP) Protocol for Drinking Water, Ambient Water, and Wastewater Monitoring
Methods -- Guidance -- July 2003 (EPA 821-B-03-004) (PDF, 2.6M)
Protocol for EPA Approval of New Methods
for Organic and Inorganic Analytes in Wastewater and Drinking Water
- March 1999 (EPA 821-B-98-003) (PDF, 1.9M)
Protocol for EPA Approval of Alternate Test
Procedures for Organic and Inorganic Analytes in Wastewater and Drinking
Water - March 1999 (EPA 821-B-98-002) (PDF, 1.9M)
can be ordered through the Water Shopping Cart Database
Test Methods Index
Lists hundreds of test methods used by US environmental labs.