Travis County enforces strict impervious cover limits in the Edwards Aquifer recharge and contributing zones under Chapter 64 of County Code. Recharge zone residential sites limited to 20% impervious cover on lots under 1 acre and 15% on larger lots. Contributing zone allows 25-40% depending on lot size. Non-aquifer rural sites face no county coverage cap.
Development in these zones requires a Water Quality Protection Plan reviewed by TNR. Impervious cover includes roofs, driveways, pool decks, and sidewalks. Water quality BMPs such as sedimentation/filtration basins are required to offset impervious area. Barton Springs Segment of Edwards Aquifer receives heightened scrutiny because of endangered salamander species.
Chapter 64 violations: up to $1,000 per day per TX Water Code 26.121. Stop-work orders and mandatory restoration common. TCEQ concurrent enforcement.
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See how Travis County's lot coverage limits rules stack up against other locations.
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