Environmental Rules in Lewisville, TX (2026)
4 verified environmental rules for Lewisville, Texas, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Lewisville regulates stormwater through its TCEQ MS4 permit. Sites disturbing one acre or more need a TPDES permit and pollution prevention plan.
Lewisville Stormwater Management Regulations
Some RestrictionsErosion Control
Lewisville requires erosion and sediment controls on all construction sites. Silt fencing and inlet protection must be installed before grading begins.
Lewisville Erosion Control Requirements
Some RestrictionsFlood Zones
Lewisville has extensive FEMA floodplains from Lewisville Lake Dam, Timber Creek, and Fox Branch. Floodplain development permits and elevated construction are required.
Lewisville Flood Zone and Floodplain Regulations
Heavy RestrictionsGrading & Drainage
Lewisville requires grading permits for activities that change drainage patterns. Post-development runoff cannot exceed pre-development rates.
Lewisville Grading and Drainage Requirements
Some RestrictionsLooking for Denton County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Lewisville city rules.
Environmental Rules in Denton County →