Leander, TX Environmental Rules: Erosion Control (2026)
Key Facts
- SWPPP required
- 1+ acre disturbed
- ESCP required
- 1/4 to 1 acre
- Approval timing
- before construction starts
- Plan waived
- sites 1/4 acre or less
Summary
Leander requires a stormwater pollution prevention plan for construction sites disturbing an acre or more, and a lighter erosion control plan for smaller sites down to a quarter acre.
An SWPPP is currently required by EPA and TCEQ for all construction activities where one or more acres will be disturbed during development. Developments of sites that disturb one acre or more within the city's jurisdiction shall prepare a SWPPP that satisfies EPA, TCEQ regulations, the NPDES or TPDES construction general permit, and this article. No construction activities may begin until the SWPPP is approved by the city engineer or designee.
Full Breakdown
Leander ties erosion control obligations to how much ground a project disturbs. Developments disturbing one acre or more must prepare a full stormwater pollution prevention plan (SWPPP) meeting EPA and TCEQ standards, approved by the city engineer before any construction starts. Projects disturbing between a quarter-acre and one acre skip the SWPPP but must still submit a city-approved erosion and sedimentation control plan. Sites of a quarter-acre or less, including single-lot single-family construction, need no site-specific plan, but the responsible party must acknowledge in writing that they'll follow the city's pollution control measures.
Violations & Fines
Starting construction before the required SWPPP or erosion control plan is approved blocks the project -- no building permit or construction activity may proceed until the city engineer signs off.
Frequently Asked Questions
When does a Leander construction project need a full SWPPP?
What if my project disturbs less than an acre?
Sources & Official References
Other rules in Leander
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Erosion Control in Nearby Cities
How other cities in Williamson County handle erosion control.