Building Near the Edwards Aquifer Has Extra Rules

The Edwards rules follow mapped rock, not a mailing address. Before you clear land, build, or add some types of tanks, check TCEQ's map. It shows the recharge, transition, and contributing zones.

Work covered by the rules needs an approved Edwards plan before the soil is disturbed. The plan shows how the site will keep dirty stormwater from reaching the aquifer during and after the job.

This is separate from county septic, flood, driveway, or city permits. Put it early in the schedule. TCEQ sends Comal County questions to its San Antonio office.