How McKinney Handles Environmental Rules: A Practical Guide
McKinney maintains 124 local ordinances across all categories, and 4 of those deal specifically with environmental rules. Here is a breakdown of what the city actually requires, what is prohibited, and where McKinney falls on the strict-to-permissive spectrum compared to other cities.
Stormwater Management
McKinney operates under a TCEQ MS4 Phase II stormwater permit (TXR040000). Development over 1 acre must submit a Stormwater Pollution Prevention Plan (SWPPP) and file a Notice of Intent with TCEQ. Illicit discharges to storm drains are prohibited.
Key details: MS4 Permit: TXR040000. SWPPP Trigger: 1 acre. NOI: TCEQ filing. Illicit Discharge: 2,000 dollars per day. Only Allowed: Rainwater.
Illicit discharge fines up to 2,000 dollars per day. SWPPP non-compliance: stop-work order plus TCEQ referral.
This is one of the stricter rules in McKinney's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.
Grading & Drainage
McKinney requires a grading and drainage permit for earthwork exceeding 50 cubic yards or any grading within a floodplain. Site grading must direct runoff to approved drainage systems without increasing discharge to adjacent properties.
Key details: Permit Trigger: 50 cu yd or floodplain. Standards: Engineering Design Manual. Lot-to-lot: Prohibited. Detention: Pre-dev peak flow. Reviewer: Engineering Services.
Contact your local code enforcement office for specific penalty information.
Erosion Control
McKinney requires erosion and sediment control BMPs on all construction sites disturbing 1 acre or more. Silt fences, inlet protection, stabilized construction entrances, and perimeter controls must be installed before earthwork begins and maintained through final stabilization.
Key details: Trigger: 1 acre disturbance. Standards: NCTCOG iSWM. Stabilization: 14 days inactive. BMPs: Silt fence, inlets. Fine: 500-2,000 per day.
Stop-work orders plus 500-2,000 dollars per day per Chapter 1 general penalty. TCEQ may pursue state enforcement.
This is one of the stricter rules in McKinney's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.
Flood Zones
McKinney participates in the NFIP (CID 480134). Properties along the East Fork Trinity River, Wilson Creek, and Honey Creek include mapped SFHA Zones AE and A. Substantial improvement or substantial damage (50 percent rule) triggers full floodplain compliance per Chapter 38 Flood Damage Prevention.
Key details: NFIP CID: 480134. Rivers: East Fork Trinity, Wilson Creek. Freeboard: 2 ft above BFE. 50 Percent Rule: Substantial improvement. FIRM Effective: June 2, 2009.
Non-compliant construction: stop-work plus 2,000 dollars per day. FEMA may suspend city from NFIP for systemic violations.
This is one of the stricter rules in McKinney's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.
The Bottom Line
McKinney is tougher than many cities when it comes to environmental rules. Out of the 4 rules covered here, 3 are rated strict. If you are a homeowner, renter, or business owner in McKinney, take the time to understand these requirements before they become a problem. Most violations come with fines, and some repeat violations can escalate.
All of the above reflects McKinney's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.