Compare Regulations
Compare state baseline against local requirements in a single view
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Compare state baseline against local requirements in a single view
Rows with an amber indicator differ across selections.
| Field | State Texas TCEQ | Local Denton County (Unincorporated) Denton County Development Services |
|---|---|---|
| Permit | ||
| Permit / Authorization | Construction General Permit (TXR150000) | Floodplain Development Permit / Drainage Review |
| Submit To | TCEQ | Denton County Development Services |
| Lead Time | Must file NOI and receive authorization before construction begins | Plan review typically 2–4 weeks |
| Application Method | Online via TCEQ Water Quality ePay system | Submit via Denton County Development Services at 401 W. Hickory St., Denton, TX 76201 or online portal |
| Fee | $325 for projects disturbing < 5 acres; $525 for ≥ 5 acres | Contact agency for current fee schedule |
| Water Quality | ||
| Impervious Cover Limit | No statewide limit | No countywide impervious cover cap; drainage systems must accommodate design storm flows per Denton County Drainage Design Criteria |
| On-Site Treatment Required | Not specified at state level | No |
| Detention Required | Not specified at state level | Yes — Detention required to limit post-development peak flows to pre-development levels for 2-, 10-, and 100-year storms per Denton County Drainage Design Criteria; applies only in unincorporated areas |
| Turbidity / Discharge Standard | Not specified in CGP; discharges must not cause or contribute to violations of water quality standards | No numeric NTU limit; discharges must comply with TCEQ TXR150000 and not degrade Elm Fork Trinity River, Ray Roberts Lake, or Lewisville Lake |
| SWPPP | ||
| SWPPP / Local Plan Required | Yes | Yes — SWPPP per TCEQ TXR150000; drainage report required for county permits |
| PE Stamp Required | No | Yes |
| Inspections | ||
| Inspection Requirements | Every 14 days and within 24 hours of a rainfall event producing ≥ 0.5 inches | Denton County Development Services inspects development permits in unincorporated areas. Rapid growth across the county means frequent BMP inspection is critical. |
| Inspector Qualification | Stormwater Pollution Prevention Plan (SWPPP) Inspector — no state license required but must be knowledgeable | No county-specific certification required beyond TCEQ SWPPP requirements |
| Design & Zones | ||
| Local Design Manual | N/A — state level | Denton County Drainage Design Criteria |
| Special Overlay Zones | N/A — see local jurisdictions | Lake Ray Roberts Watershed, Lewisville Lake Watershed, Elm Fork Trinity River Floodplain, Extraterritorial Jurisdiction (ETJ) of Cities |