Williamson County, TX Environmental Rules: Stormwater Management (2026)
Key Facts
- Recharge Zone
- WPAP required first
- CGP Threshold
- 1 acre disturbed
- Permanent Controls
- Capture new pollutant load
- Enforcement
- TCEQ
Summary
Construction over the Edwards Aquifer recharge zone in western Williamson County requires a TCEQ-approved water pollution abatement plan under 30 TAC Chapter 213. Any site disturbing one acre or more also needs coverage under the TPDES Construction General Permit TXR150000.
Required plans. A plan must be submitted for the following, as appropriate: (1) a water pollution abatement plan under subsection (b) of this section to conduct regulated activities on the recharge zone not covered by subsections (c), (d), or (e) of this section.
Official source re-checked September 7, 2026: the cited page had not changed since it was quoted.
Full Breakdown
The recharge and contributing zones of the Edwards Aquifer run through western Williamson County, including areas around Georgetown, Cedar Park, and Leander. Regulated construction on the recharge zone must have a water pollution abatement plan approved by TCEQ before any land disturbance begins. Sites disturbing one acre or more must file a Notice of Intent for the TXR150000 Construction General Permit and keep a stormwater pollution prevention plan on site. Permanent water-quality controls must capture the increase in pollutant load from new impervious cover.
Violations & Fines
Clearing or excavating recharge-zone land without an approved water pollution abatement plan triggers TCEQ enforcement, administrative penalties, and stop-work orders. Discharging construction stormwater without Construction General Permit authorization violates the Texas Water Code.
Frequently Asked Questions
Does every construction site need a water pollution abatement plan?
Who approves the water pollution abatement plan?
Sources & Official References
Other rules in Williamson County
Texas rules heatmap·Compare Williamson County to another location·View the Texas environmental rules overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.