Water Quality Assessment and
Total Maximum Daily Loads Information (ATTAINS)

The Assessment Total Maximum Daily Load (TMDL) Tracking and Implementation System (ATTAINS) provides information reported by the states to EPA about the conditions in their surface waters. This information is required every two years under Clean Water Act Sections 305(b) and 303(d).

Because of differences in state assessment methods, the information in this site should not be used to compare water quality conditions between states or to determine water quality trends. Check out the Frequent Questions box on the right to learn more.

Which state reports are available?

National Summary of State Information

Frequent Questions

Search for Water Quality Information

Click on the above map for a state's most recent data, or use the pull down boxes below to:

Select data for a reporting cycle (e.g. most current available data, 2006, 2004)
Select data for a particular state, EPA Region, or the nation as a whole
Select data for a particular waterbody, such as Bear River (first choose the state, then type in the name of the waterbody)

Reporting Year:
Nation/Region/State:
Waterbody Name:

	All Information
	Impaired Waters and TMDL Information

Use the radio buttons on the right to limit the results of your search. (Note: Total Maximum Daily Loads, or TMDLs, are pollutant "budgets" developed to restore waters that are impaired).

Water Quality Assessment andTotal Maximum Daily Loads Information (ATTAINS)

Frequent Questions

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Water Quality Assessment and
Total Maximum Daily Loads Information (ATTAINS)