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 Travis County Travis County Transportation and Natural Resources (TNR) Department |
|---|---|---|
| Permit | ||
| Permit / Authorization | Construction General Permit (TXR150000) | Drainage Permit / Site Development Permit |
| Submit To | TCEQ | Travis County Transportation and Natural Resources (TNR) Department |
| Lead Time | Must file NOI and receive authorization before construction begins | Typically 4–8 weeks for standard review; complex projects or those in sensitive zones may require additional time |
| Application Method | Online via TCEQ Water Quality ePay system | Submit application package to Travis County TNR; online portal and in-person submission accepted. Contact TNR Engineering at (512) 854-9400. |
| 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 single county-wide cap; watershed-specific limits apply. Barton Creek Watershed limits apply per TCEQ and city regulations for contributing zones. Unincorporated areas outside regulated watersheds follow state TPDES thresholds. |
| On-Site Treatment Required | Not specified at state level | Yes |
| Detention Required | Not specified at state level | Yes — Detention required per Travis County Drainage Criteria Manual. Post-development peak flow must not exceed pre-development peak flow for the 2-, 10-, and 100-year storm events. Water quality volume (WQV) capture required for the 1.5-inch water quality storm. |
| Turbidity / Discharge Standard | Not specified in CGP; discharges must not cause or contribute to violations of water quality standards | Comply with TPDES Construction General Permit (TXR150000) effluent limits; discharge must not cause or contribute to a violation of water quality standards in receiving waters. |
| SWPPP | ||
| SWPPP / Local Plan Required | Yes | Yes — Stormwater Pollution Prevention Plan (SWPPP) per TPDES TXR150000 |
| PE Stamp Required | No | No |
| Inspections | ||
| Inspection Requirements | Every 14 days and within 24 hours of a rainfall event producing ≥ 0.5 inches | Travis County TNR conducts drainage and erosion control inspections for permitted projects in unincorporated areas. Inspections are required at key construction milestones (pre-construction, during grading/infrastructure installation, and final). Projects in the Barton Springs Contributing Zone may be subject to additional inspections. |
| Inspector Qualification | Stormwater Pollution Prevention Plan (SWPPP) Inspector — no state license required but must be knowledgeable | No county-specific inspector certification beyond standard TPDES requirements. TPDES CGP requires a qualified person to conduct site inspections at least once every 14 calendar days and within 24 hours of a storm event of 0.5 inches or greater. |
| Design & Zones | ||
| Local Design Manual | N/A — state level | Travis County Drainage Criteria Manual |
| Special Overlay Zones | N/A — see local jurisdictions | Barton Springs Edwards Aquifer Contributing Zone, Critical Water Quality Zone (CWQZ), FEMA Special Flood Hazard Area (SFHA) |