4 county-level rules, plus city-specific rules for 4 cities in Collin County, Texas.
Verified from official government sources
Collin County and its cities operate under TPDES MS4 Phase II permits requiring stormwater management plans, illicit discharge bans, and construction site runoff controls for disturbances over 1 acre.
Erosion control on Collin County construction sites follows TCEQ CGP TXR150000 and city engineering standards. Silt fence, inlet protection, and stabilized entrances required on all disturbances over 1 acre.
TCEQ Stormwater General Permit for Construction Activities (TXR150000) — Stormwater Requirements / SWP3 / Waivers
Stormwater permit requirements for the discharge of stormwater associated with construction activities that disturb one (1) or more acres of soil. [...] TCEQ issued the renewal of the CGP with an effective date of March 5, 2023. Construction activities are regulated under the CGP if they discharge stormwater to any surface water in the state and disturb an acre or more of soil. [...] Stormwater...
Collin County participates in NFIP with floodplain management ordinances. Lake Lavon and Lake Ray Hubbard drive FEMA Zone AE and shaded X designations. New construction in SFHA must elevate 1-2 ft above BFE.
FEMA Flood Map Service Center — About Flood Map Service Center
The FEMA Flood Map Service Center (MSC) is the official public source for flood hazard information produced in support of the National Flood Insurance Program (NFIP). Use the MSC to find your official flood map, access a range of other flood hazard products, and take advantage of tools for better understanding flood risk. FEMA flood maps are continually updated through a variety of processes. E...
Grading and drainage work over 1 acre requires a Collin County or city engineering permit plus TCEQ CGP. Sites must drain positively away from foundations with 6-inch fall in first 10 feet.
Tex. Local Government Code Sec. 232.003 (County Subdivision Requirements - Drainage)
Sec. 232.003. SUBDIVISION REQUIREMENTS. By an order adopted and entered in the minutes of the commissioners court, and after a notice is published in a newspaper of general circulation in the county, the commissioners court may:(1) require a right-of-way on a street or road that functions as a main artery in a subdivision, of a width of not less than 50 feet or more than 100 feet;(2) requir...
4 cities in Collin County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
9 verified rules • Climate Emergency Mobilization, Coastal Development
9 verified rules • Climate Emergency Mobilization, Coastal Development
4 verified rules • Erosion Control, Flood Zones
4 verified rules • Erosion Control, Flood Zones
See every category we cover for Collin County — parking, noise, fences, fires, animals, pools, and more.
Collin County Ordinance Hub →