Water Quality Monitoring - Edwards Aquifer Authority

Water Quality Monitoring

The EAA operates nine continuous water quality monitors in the Comal and San Marcos spring systems as part of the Edwards Aquifer Habitat Conservation Plan (EAHCP)program. Maps presented here show the locations of the five sites at Comal Springs, and four sites at San Marcos Springs. The names of the sites are:

Comal Springs

  • Comal Spring Run 3
  • Comal Spring 7
  • Landa Lake
  • Comal River – Old Channel
  • Comal River – New Channel

San Marcos Springs

  • San Marcos River at Aquarena Springs Drive
  • San Marcos River at Rio Vista Park
  • San Marcos River at TPWD Fish Hatchery
  • Sessom Creek

At each of these nine monitoring sites, water quality instruments are installed that measure and record the following parameters in 15-minute intervals:

  1. Water Temperature
  2. Specific Conductance
  3. Dissolved Oxygen (HDO)
  4. pH
  5. Turbidity

These data are transmitted via telemetry to a web-based water quality data service, called “EnviroNet” which is a product of Netronix. The EAA can provide user access to the continuous water quality data through the EnviroNet service to the public by assigning a user account to interested individuals. For data access, please contact Dr. Chad Furl or Matthew Schwarz via email.

In a continued response to Covid-19, the EAA & EAC will remain working in a telecommuting manner until further notice.
Please click here if you are a customer or if you need to contact someone at the EAA.