Environmental Rules in Leander, TX (2026)
4 verified environmental rules for Leander, Texas, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Leander bans discharging anything but stormwater or authorized non-stormwater flows into its municipal storm sewer system, naming motor oil, hazardous waste, wastewater, garbage and yard debris among the prohibited pollutants, with fines up to $2,000 a day plus state civil penalties.
Leander Stormwater Discharge Ban
Significant RestrictionsLeander Code of Ordinances § 6.07.023
Sec. 6.07.023. - Discharge prohibitions. (a)Prohibition of illegal discharges. No person shall discharge or cause to be discharged into the municipal storm sewer system (MS4) or conveyances any materials, including but not limited to pollutants or waters containing any pollutants that cause or contribute to a violation of applicable water quality standards, other than stormwater or authorized n...
Erosion Control
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.
Leander Requires Erosion Control for Construction
Some RestrictionsLeander Code of Ordinances § 6.07.061
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 ...
Flood Zones
Leander requires a floodplain development permit for any structure or land-use change within its FEMA-mapped special flood hazard areas, covering both the Williamson County and Travis County portions of the city under the September 26, 2008 Flood Insurance Studies. The city engineer serves as floodplain administrator and reviews every application against ten factors, from flood danger to drainage impact.
Leander Floodplain Development Permit Rules
Some RestrictionsLeander Code of Ordinances §§ 3.10.007-3.10.009
Sec. 3.10.007. - Basis for establishing areas of special flood hazard. The areas of special flood hazard identified by the Federal Emergency Management Agency in the scientific and engineering reports entitled "The Flood Insurance Study for Travis County, Texas and Incorporated Areas," dated September 26, 2008, and "The Flood Insurance Study for Williamson County, Texas and Incorporated Areas,"...
Flood Elevation Requirements
New and substantially improved homes in Leander's mapped flood hazard areas must have their lowest floor built at least two feet above the base flood elevation, a stricter freeboard than FEMA's zero-foot federal minimum. Commercial buildings can meet the same two-foot mark or be engineered watertight instead, and every design has to carry a registered engineer's, architect's, or surveyor's certification.
Leander Requires 2-Foot Flood Elevation Freeboard
Some RestrictionsLeander Code of Ordinances § 3.10.072(1), (3)
(1)Residential construction. New construction and substantial improvement of any residential structure shall have the lowest floor (including basement) elevated at least two feet above the base flood elevation. A registered professional engineer, architect, or land surveyor shall submit a certification to the floodplain administrator that the standard of this subsection, as proposed in section ...
Looking for Williamson County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Leander city rules.
Environmental Rules in Williamson County →