USGS Water-Quality Information
Water Quality Data
Today's Water Conditions
Get continuous real-time water-quality measurements from Water-Quality Watch maps.
Water Quality Portal (WQP)
Get current and historical USGS and EPA water-quality data at the WQP.
Get stream ecosystem aquatic bioassessment data from BioData.
For More Data
Contact the USGS Office of Water Quality
Contact us by email, phone, or mail:
Phone: (703) 648-6862
While we make every effort to reply to your inquiries as soon as possible, please allow up to seven days for a response.
Contact Information for Other USGS Resources
For other national USGS water information, contact the following offices:
For local USGS water information, contact the USGS Water Science Center in your state:
To locate a specific USGS employee, use the Electronic Phone Book.
The USGS does not regulate water quality or enforce water-quality standards.