Clean Water Act discharge permit · NPDES TX0093823
SOUTHWOOD ESTATES WWTP, Rosharon, TX: NPDES TX0093823 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
SOUTHWOOD ESTATES WWTP, held by UNDINE TEXAS ENVIRONMENTAL LLC, holds NPDES permit TX0093823, which discharges to Bcdd Ditch;W Fork Chocolate Bayou;Chocolate Bayou. EPA’s file records it issued September 18, 2018 and expiring September 18, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SOUTHWOOD ESTATES WWTP |
|---|---|
| Permittee as filed | UNDINE TEXAS ENVIRONMENTAL LLC |
| NPDES ID | TX0093823 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 18, 2018 |
| Expiration date | September 18, 2023 |
| Address | Rosharon, TX 77583 |
| Receiving water | BCDD DITCH;W FORK CHOCOLATE BAYOU;CHOCOLATE BAYOU |
| Subwatershed | Mustang Bayou (HUC 120402040400) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 39Pollutants on file
- 38Under a numeric limit
- 38With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| E. coli, colony forming units [CFU] | 2 | 50 | 48 | June 30, 2026 | 5,965% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 27 | 17 | February 28, 2026 | 129% over the limit |
| Solids, total suspended | 3 | 18 | 8 | March 31, 2026 | 123% over the limit |
| Coliform, fecal general | 0 | 12 | 8 | August 31, 2013 | 2,925% over the limit |
| pH | 3 | 10 | 2 | May 31, 2015 | |
| Flow, in conduit or thru treatment plant | 2 | 8 | 2 | April 30, 2023 | 259% over the limit |
| Arsenic, dry weight | 5 | 10 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 10 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 3 | 9 | 0 | ||
| Selenium, dry weight | 3 | 6 | 0 | ||
| Copper, dry weight | 3 | 6 | 0 | ||
| Cadmium, dry weight | 3 | 6 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 6 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 6 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 6 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 6 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 6 | 0 | ||
| Chlorine, total residual | 2 | 6 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 5 | 0 | ||
| Annual amt sludge transported interstate | 1 | 5 | 0 | ||
| Nickel, total [as Ni] | 2 | 4 | 0 | ||
| Level of pathogen requirements achieved | 2 | 4 | 0 | ||
| Description of pathogen option used | 2 | 4 | 0 | ||
| Vector attraction reduction alternative used | 2 | 4 | 0 | ||
| Annual amt of sludge incinerated | 1 | 4 | 0 | ||
| Annual amount of sludge land applied | 1 | 4 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 4 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 3 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 3 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 3 | 0 | ||
| Annual sludge production, total | 1 | 3 | 0 | ||
| Fecal coliform | 1 | 2 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 2 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 2 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 2 | 0 | ||
| Boundary areas | 1 | 2 | 0 | ||
| Salmonella | 1 | 2 | 0 | ||
| Pollutant table from 503.13 | 1 | 2 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 28, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| January 11, 2019 | Permit Violations - Violation Specified in Comment | ST6 |
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.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.