NPDES TX0094706 · Clean Water Act
HARRIS COUNTY MUD 230 WWTP, Houston, TX: NPDES TX0094706 discharge permit, effluent exceedances, inspections, penalties
HARRIS COUNTY MUD 230 WWTP, Houston, Texas: Individual permit TX0094706, held by HARRIS COUNTY MUD 230; Publicly owned treatment works; Administratively continued; issued April 16, 2018, term to April 16, 2023; discharges to HCFCDD K139-00-00, CYPRESS CREEK.
33 of the 38 pollutants listed for NPDES TX0094706 have no violation or effluent exceedance.
- Nitrogen, ammonia total [as N]: 3 limits, 26 violations of any kind, 26 effluent exceedances, latest May 31, 2025, largest 260% over the limit.
- E. coli: 2 limits, 14 violations of any kind, 14 effluent exceedances, latest June 30, 2026, largest 2,320% over the limit.
- Solids, total suspended: 3 limits, 6 violations of any kind, 6 effluent exceedances, latest March 31, 2023, largest 144% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 4 violations of any kind, 4 effluent exceedances, latest July 31, 2024, largest 18% over the limit.
- Toxicity characteristic leaching procedure: 1 limit, 1 violation of any kind.
- Arsenic, dry weight: 5 limits.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits.
- pH: 3 limits.
- Selenium, dry weight: 3 limits.
- Copper, dry weight: 3 limits.
- Cadmium, dry weight: 3 limits.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits.
- Lead, sludge, total, dry weight [as Pb]: 3 limits.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits.
- BOD, carbonaceous [5 day, 20 C]: 3 limits.
- Nickel, total [as Ni]: 2 limits.
- Flow, in conduit or thru treatment plant: 2 limits.
- Chlorine, total residual: 2 limits.
- Level of pathogen requirements achieved: 2 limits.
- Description of pathogen option used: 2 limits.
- Vector attraction reduction alternative used: 2 limits.
- Fecal coliform: 1 limit.
- Polychlorinated biphenyls [PCBs]: 1 limit.
- Annual whole sludge application rate: 1 limit.
- Ann. amt sludge disposed by other method: 1 limit.
- Annual amt of sludge incinerated: 1 limit.
- Annual sludge production, total: 1 limit.
- Annual amount of sludge land applied: 1 limit.
- Annual amt. sludge disposed surface unit: 1 limit.
- Annual amt sludge disposed in landfill: 1 limit.
- Annual amt sludge transported interstate: 1 limit.
- Unit w/liner/leachate collection system: 1 limit.
- Compliance w/part 258 sludge requirement: 1 limit.
- Boundary areas: 1 limit.
- Salmonella: 1 limit.
- Pollutant table from 503.13: 1 limit.
- July 22, 2026: State CWA Penalty AO (State), $39,875 state or local penalty.
- February 3, 2026: Permit Violations - Violation Specified in Comment (ST6).
- February 3, 2026: Evaluation (S).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 748 were issued before TX0094706.
Coverages issued nearest TX0094706
- 2018-04-09: HARRIS COUNTY MUD NO 249 WWTP, Houston: TX0116068, held by HARRIS COUNTY MUD 249
- 2018-04-09: HARRIS COUNTY MUD 374, Houston: TX0124974
- 2018-04-09: CITY OF LINDEN JIMS BAYOU WWTP, Linden: TX0135984, held by CITY OF LINDEN
- 2018-04-09: CITY OF DILLEY WWTP, Dilley: TX0137936, held by CITY OF DILLEY
- 2018-04-16: HARRIS COUNTY WCID 116 WWTP, Houston: TX0046710, held by HARRIS COUNTY WCID 116
- 2018-04-16: HARRIS COUNTY MUD 1 WWTP 2, Houston: TX0129330, held by HARRIS COUNTY MUD 1
- 2018-04-18: MONTGOMERY COUNTY MUD 19 WWTP, Montgomery County: TX0076538, held by MONTGOMERY COUNTY MUD 19
- 2018-04-25: EMERALD FOREST UD WWTP, Houston: TX0027324, held by EMERALD FOREST UTILITY DISTRICT
- 2018-04-25: MEADOWHILL REGIONAL WWTP, Houston: TX0046663, held by MEADOWHILL REGIONAL MUD
- 2018-04-25: RED OAK CREEK REGIONAL WWTP, Red Oak: TX0104345, held by TRINITY RIVER AUTHORITY OF TEXAS
HARRIS COUNTY MUD 230 WWTP among its neighbors
121 discharge permits are in the Marshall Lake-Cypress Creek subwatershed (HUC 120401020106); TX0094706 is one. Its county: 4,455, 195 major; TX0094706 is minor permit.
Other permits in the Marshall Lake-Cypress Creek subwatershed (HUC 120401020106)
- ALTA LACEY ROAD, Tomball: TXR1599XG, minor, term to 2028-03-04
- AMPLIFY TOMBALL, Tomball: TXR1556TH, minor, term to 2028-03-04
- APEX OIL & GAS, INC., Houston: GMG290176, minor, term to 2012-09-30
- ASHER SPRING CYPRESS, Houston: TXR1539WZ, minor, term to 2028-03-04
- BAMMEL UTILITY DISTRICT WWTP, Houston: TX0046639, major, term to 2023-05-18
- BEARDED FOX BREWING, Tomball: TXRNECD24, minor, term to 2026-08-13
- BECK AND MASTEN KIA PHASE 2, Tomball: TXR1513YF, minor, term to 2028-03-04
- BILMA PUD - WWTP, Houston: TX0077941, minor, term to 2023-02-01
- BRICCO METAL FINISHING, Cypress: TXR05GL91, minor, term to 2026-08-13
- BRICCO METAL FINISHING, Cypress: TXRNEBU18, minor, term to 2026-08-13
Identity
| Facility | HARRIS COUNTY MUD 230 WWTP |
|---|---|
| Permittee | HARRIS COUNTY MUD 230 |
| NPDES ID | TX0094706 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Minor |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | April 16, 2018 |
| Expires | April 16, 2023 |
| Address | Houston, TX 77002 |
| Receiving water | HCFCDD K139-00-00, CYPRESS CREEK |
| Subwatershed | Marshall Lake-Cypress Creek (HUC 120401020106) |
NPDES TX0094706: effluent limits and exceedances
HARRIS COUNTY MUD 230 WWTP (NPDES TX0094706): 38 pollutants on file, 38 limited; 5 with a violation of any kind, 4 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 3 | 26 | 26 | May 31, 2025 | 260% over the limit |
| E. coli | 2 | 14 | 14 | June 30, 2026 | 2,320% over the limit |
| Solids, total suspended | 3 | 6 | 6 | March 31, 2023 | 144% over the limit |
| Oxygen, dissolved [DO] | 1 | 4 | 4 | July 31, 2024 | 18% over the limit |
| Toxicity characteristic leaching procedure | 1 | 1 | 0 | ||
| Arsenic, dry weight | 5 | 0 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 0 | 0 | ||
| pH | 3 | 0 | 0 | ||
| Selenium, dry weight | 3 | 0 | 0 | ||
| Copper, dry weight | 3 | 0 | 0 | ||
| Cadmium, dry weight | 3 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 0 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 3 | 0 | 0 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Chlorine, total residual | 2 | 0 | 0 | ||
| Level of pathogen requirements achieved | 2 | 0 | 0 | ||
| Description of pathogen option used | 2 | 0 | 0 | ||
| Vector attraction reduction alternative used | 2 | 0 | 0 | ||
| Fecal coliform | 1 | 0 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 0 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 0 | 0 | ||
| Annual amt of sludge incinerated | 1 | 0 | 0 | ||
| Annual sludge production, total | 1 | 0 | 0 | ||
| Annual amount of sludge land applied | 1 | 0 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 0 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 0 | 0 | ||
| Annual amt sludge transported interstate | 1 | 0 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 0 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 0 | 0 | ||
| Boundary areas | 1 | 0 | 0 | ||
| Salmonella | 1 | 0 | 0 | ||
| Pollutant table from 503.13 | 1 | 0 | 0 |
NPDES TX0094706: inspections, violations and enforcement
NPDES TX0094706: 1 single-event violation
| Date | What EPA recorded | Agency |
|---|---|---|
| February 3, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
NPDES TX0094706: 1 inspection
| Date | What EPA recorded | Agency |
|---|---|---|
| February 3, 2026 | Evaluation | S |
NPDES TX0094706: 1 formal enforcement action
1 of them with a penalty assessed. How penalties are shown.
| Date | What EPA recorded | Agency | Federal penalty | State or local penalty |
|---|---|---|---|---|
| July 22, 2026 | State CWA Penalty AO | State | $39,875 |
NPDES TX0094706 (HARRIS COUNTY MUD 230 WWTP): no informal enforcement action on file.
Watch NPDES TX0094706
NPDES TX0094706: one email when its EPA record changes — $99/month.
Permits near NPDES TX0094706
NPDES TX0094706: 38 pollutant rows, 3 dated events; ICIS-NPDES download, loaded September 15, 2026.