USGS Water-Quality Information
USGS personnel collect a water-quality sample on the Missouri River. USGS/Photo by Kelly Brady.
Water Quality Data
National Water Information System (NWIS)
NWIS provides current and historical water-quality data.
Today's Water Conditions
Water-Quality Watch provides continuous real-time water-quality measurements.
Water-Quality Web Services
Web services automate the sharing of USGS and USEPA water-quality monitoring data.
For More Data
Additional water-quality data resources are available.
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.