Managing nuisance aquatic plants

HYDRILLA

HYDRILLA

WATER HYACINTH (photo credit: Paul Skawinski)

WATER HYACINTH

EURASIAN WATERMILFOIL (photo credit: Alison Fox, University of Florida)

EURASIAN WATERMILFOIL

Invasive aquatic plants such as hydrilla, water hyacinth and Eurasian watermilfoil are sometimes found in the Highland Lakes.

LCRA manages hydrilla and water hyacinth on the Highland Lakes because these plants have the potential for the most impact to LCRA operations and customers. If you see hydrilla or water hyacinth in the Highland Lakes, please contact LCRA Water Quality at waterweeds@lcra.org.

Native plants cabomba, coontail and water stargrass also can become abundant in the Highland Lakes and Colorado River. Treatment is not recommended for these native plants, as they provide important habitat for fish and other aquatic organisms.

Nuisance aquatic vegetation control options

If you are planning to manually or chemically control any native or invasive plants that grow in public waterways, submit the following to the Texas Parks and Wildlife Department at marcos.dejesus@tpwd.texas.gov and LCRA at waterweeds@lcra.org:

  1. Treatment proposal form (.pdf)
  2. Map of the proposed treatment area
  3. Photographs of the plant and the problem it is causing

Do not proceed without TPWD approval. LCRA receives the treatment proposals for informational purposes only.

Depending on the chemical used, lake water in the vicinity of the treatment should not be used for irrigation or potable purposes for approximately one week after treatment.

If you questions about Lake Austin or Lady Bird Lake, contact the City of Austin Watershed Protection Department.

Help minimize growth and spread of invasive plants

  • Clean, drain and dry your boats when entering or leaving a lake to avoid transporting non-native species.
  • Reduce or eliminate fertilization on lakeside properties.
  • Plant native vegetation buffer strips along the lakeshore to filter the nutrients from rainfall or irrigation runoff coming from lawns.
  • Don't let grass clippings and leaves get into the lake.
  • Clean up pet waste.
  • Make sure septic systems are properly maintained.

If you have questions about water weeds, please contact LCRA Water Quality at waterweeds@lcra.org or 800-776-5272, ext. 2112.




​​