Colorado River Watch Network

Water quality data

View CRWN monitoring sites and water quality data.


Volunteer resources

Enter data and learn more about becoming a monitor.


Frequently asked questions

Learn more about CRWN.


The Colorado River Watch Network (CRWN) is the first and largest regional volunteer network of water quality monitors in Texas.

Trained volunteers submit water quality data that is reviewed and analyzed by CRWN staff, creating an early warning system that alerts LCRA to potential water quality threats. Though CRWN only requires a two-year commitment to the monthly monitoring, many volunteers have been participating for 5 to 10 years.

Volunteers often partner with family, friends or colleagues, working together to test water quality parameters at their sites each month. All testing equipment is loaned to a monitoring group or individual and supplies are restocked for the duration of their active participation.