Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

New WQX 3.0 profiles are available at waterqualitydata.us/beta/. These profiles will contain recent USGS data added since March 11, 2024, which marks the beginning of limited accessibility for USGS data. Read more about the 3.0 profiles and associated changes here.

This legacy user interface will continue to function for several weeks. However, this user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

The Water Quality Portal Team welcomes your comments on how we can improve our products. We strive to respond to every comment with an answer or an appropriate referral as quickly as possible. Most comments will be responded to within 10 business days.

For assistance, call 1-800-424-9067 or email to WQX@epa.gov. You may also contact your  EPA Regional EPA/ WQX Coordinator.

For assistance, call 1-800-424-9067 or use the form below to email us your question or comment. You may also contact your EPA Regional EPA/ WQX Coordinator.

To use the form, fill in the fields and then click the Send comments button. An email window should appear. If the body of the message is blank, please fill in the information that you added to the form. You should then click send. If you have problems using this form, we suggest that you send us your comments by e-mail to: WQX@epa.gov.