USGS Water-Quality Information
USGS personnel collect a water-quality sample on the Missouri River. USGS/Photo by Kelly Brady.
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 using our online feedback form, by phone, or by 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.