Clean Water Act discharge permit · NPDES TX0135712
SUNSET OAKS WWTF, San Marcos, TX: NPDES TX0135712 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
SUNSET OAKS WWTF, held by AQUA UTILITIES INC, holds NPDES permit TX0135712, which discharges to Hemphill Creek;Morrison Ck;Lower San Marcos River. EPA’s file records it issued April 19, 2017 and expiring February 1, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SUNSET OAKS WWTF |
|---|---|
| Permittee as filed | AQUA UTILITIES INC |
| NPDES ID | TX0135712 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | April 19, 2017 |
| Expiration date | February 1, 2020 |
| Address | San Marcos, TX 78640 |
| Receiving water | HEMPHILL CREEK;MORRISON CK;LOWER SAN MARCOS RIVER |
| Subwatershed | Morrison Creek-San Marcos River (HUC 121002030304) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 0Under a numeric limit
- 8With a violation of any kind
- 4With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Chlorine, total residual | 0 | 8 | 4 | March 31, 2025 | 243% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 0 | 9 | 3 | July 31, 2026 | 12% over the limit |
| E. coli | 0 | 6 | 2 | November 30, 2025 | 398% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 7 | 1 | June 30, 2026 | 60% over the limit |
| Solids, total suspended | 0 | 6 | 0 | ||
| pH | 0 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 0 | 4 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 2 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0135712.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID TX0135712 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.