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 City of San Marcos City of San Marcos Development Services |
|---|---|---|
| Permit | ||
| Permit / Authorization | Construction General Permit (TXR150000) | Grading / Drainage Permit |
| Submit To | TCEQ | City of San Marcos 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 City of San Marcos Development Services at 630 E. Hopkins St., San Marcos, TX 78666 or online portal at sanmarcostx.gov |
| 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 | Portions of San Marcos are within the Edwards Aquifer Recharge Zone or Contributing Zone — EAA permit required; impervious cover caps (15% recharge zone / up to 65% contributing zone with controls) apply; downtown and older areas over recharge zone face development constraints |
| 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-, 5-, 10-, 25-, and 100-year storms per City of San Marcos and Hays County Drainage Criteria; San Marcos River and Blanco River flash flood risk requires conservative design |
| 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 San Marcos River, Blanco River, or Barton Springs Pool water quality |
| SWPPP | ||
| SWPPP / Local Plan Required | Yes | Yes — SWPPP per TCEQ TXR150000; drainage report required for local permit |
| PE Stamp Required | No | Yes |
| Inspections | ||
| Inspection Requirements | Every 14 days and within 24 hours of a rainfall event producing ≥ 0.5 inches | City of San Marcos Development Services inspects grading permits at rough grading and final stabilization. Edwards Aquifer protection sites require active BMP maintenance. |
| Inspector Qualification | Stormwater Pollution Prevention Plan (SWPPP) Inspector — no state license required but must be knowledgeable | No city-specific certification required beyond TCEQ SWPPP requirements |
| Design & Zones | ||
| Local Design Manual | N/A — state level | City of San Marcos Drainage Criteria / Hays County Drainage Design Standards |
| Special Overlay Zones | N/A — see local jurisdictions | Edwards Aquifer Recharge Zone — San Marcos Springs, San Marcos River (Federally Protected Habitat), Blanco River Floodplain, Texas State University Campus Zone |