An official website of the United States government.

Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Drinking Water Tools

The Drinking Water tools assist with analyzing drinking water data.


Safe Drinking Water Information System (SDWIS)

SDWIS provides information about the quality of drinking water. Read more about SDWIS.

Water Contaminant Information Tool (WCIT)

WCIT contains information on chemical, biological, and radiological contaminants that may potentially pose a threat to drinking water. Read more about WCIT.

Water Utility Response On The Go

Water Utility Response On The Go is a mobile tool that allows water utilities to respond to emergency incidents. Read more about Response OTG.