Clean Water Act discharge permit · NPDES TX0022063
STANLEY LAKE MUD WWTP, Conroe, TX: NPDES TX0022063 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
STANLEY LAKE MUD WWTP, held by STANLEY LAKE MUD, holds NPDES permit TX0022063, which discharges to Lake Conroe. EPA’s file records it issued August 18, 2017 and expiring June 1, 2022.
STANLEY LAKE MUD WWTP, Conroe, Texas: Individual permit TX0022063, held by STANLEY LAKE MUD; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued August 18, 2017, term to June 1, 2022; discharges to LAKE CONROE.
- Chlorine, total residual: 2 limits, 135 violations of any kind, 9 effluent exceedances, latest October 31, 2007, largest 107% over the limit.
- E. coli: 2 limits, 6 violations of any kind, 4 effluent exceedances, latest December 31, 2014, largest 514% over the limit.
- Flow, in conduit or thru treatment plant: 2 limits, 131 violations of any kind, 1 effluent exceedance, latest June 30, 2006, largest 153% over the limit.
- pH: 3 limits, 127 violations of any kind, 1 effluent exceedance, latest November 30, 2007.
- Solids, total suspended: 3 limits, 189 violations of any kind, 0 effluent exceedances.
- BOD, 5-day, 20 deg. C: 0 limits, 180 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 63 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 19 violations of any kind, 0 effluent exceedances.
- Nitrogen, ammonia total [as N]: 3 limits, 12 violations of any kind, 0 effluent exceedances.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 12 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 5 limits, 10 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 7 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 7 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 7 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 1 limit, 6 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 6 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 6 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Salmonella: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- February 18, 2026: Evaluation (S).
- October 10, 2025: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 546 were issued before TX0022063.
Coverages issued nearest TX0022063
- August 4, 2017: HIGHLANDS OF SALADO WWTF, Bell County, TX0125610, held by VILLAGE OF SALADO
- August 9, 2017: HARRIS COUNTY MUD 127 WWTP, Katy, TX0083500, held by HARRIS COUNTY MUD 127
- August 9, 2017: FORT BEND COUNTY MUD 30 WWTP2, Richmond, TX0135259, held by FORT BEND COUNTY MUD 30
- August 10, 2017: HARRIS COUNTY MUD 345 WWTF, Houston, TX0086690, held by HARRIS COUNTY MUD 345
- August 16, 2017: GREENWOOD UTILITY DISTRICT WWTP, Houston, TX0020800, held by GREENWOOD UTILITY DISTRICT
- August 18, 2017: POINT AQUARIUS MUD WWTP, Willis, TX0022071, held by POINT AQUARIUS MUD
- August 18, 2017: MONTGOMERY COUNTY MUD 2 WWTP, Montgomery County, TX0032514, held by MONTGOMERY COUNTY UTILITY DISTRICT NO 2
- August 18, 2017: LAKE CONROE HILLS MUD WWTP, Willis, TX0054364, held by LAKE CONROE HILLS MUD
- August 18, 2017: MONTGOMERY COUNTY MUD 16 WWTP, Splendora, TX0078344, held by MONTGOMERY COUNTY MUD 16
- August 18, 2017: PINE MILL RANCH FT BEND COUNTY MUD 57 WWTP, Fort Bend County, TX0126527, held by FORT BEND COUNTY MUD 57
STANLEY LAKE MUD WWTP among its neighbors
EPA’s permit file holds 76 discharge permits in the Town Creek-Conroe Lake subwatershed (HUC 120401010206), TX0022063 among them. Its county holds 1,439, 16 of them major permits; TX0022063 is a minor permit.
Other permits in the Town Creek-Conroe Lake subwatershed (HUC 120401010206)
- 10533 W FM 1097, Willis: TXR1568MO, minor permit, discharging to LAKE CONROE, permit term to March 4, 2028
- 10918 DECATUR STREET, Willis: TXR1513ZB, minor permit, discharging to LAKE CONROE, permit term to March 4, 2028
- ADF EXCAVATION PIT, Willis: TXR05DX64, minor permit, permit term to August 13, 2021
- BRIARLEY, Montgomery: TXR1579UB, minor permit, discharging to THE SAN JACINTO RIVER BASIN, permit term to March 4, 2028
- CAPE CONROE, Montgomery: TXR1556XM, minor permit, discharging to LAKE CONROE, permit term to March 4, 2028
- CHAPEL BEND, Montgomery: TXR1565ME, minor permit, discharging to CARWILE CREEK, permit term to March 4, 2028
- CHAPEL RUN, Conroe: TXR1597XN, minor permit, discharging to WEST FORK SAN JACINTO RIVER, permit term to March 4, 2028
- DEL LAGO ESTATES WWTP, Montgomery: TX0104060, minor permit, discharging to LAKE CONROE, permit term to June 1, 2022
- DEL LAGO WWTF, Montgomery: TX0089630, minor permit, discharging to LAKE CONROE, permit term to June 1, 2022
- DETENTION TO SERVE TRIB 4X-1 AT THE WOODLANDS HILL, Willis: TXR1560PF, minor permit, discharging to STEWARTS CREEK, permit term to March 4, 2028
Identity
| Facility as filed | STANLEY LAKE MUD WWTP |
|---|---|
| Permittee as filed | STANLEY LAKE MUD |
| NPDES ID | TX0022063 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 18, 2017 |
| Expiration date | June 1, 2022 |
| Address | Conroe, TX 77356 |
| Receiving water | LAKE CONROE |
| Subwatershed | Town Creek-Conroe Lake (HUC 120401010206) |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 39Pollutants on file
- 38Under a numeric limit
- 38With 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 | 2 | 135 | 9 | October 31, 2007 | 107% over the limit |
| E. coli | 2 | 6 | 4 | December 31, 2014 | 514% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 131 | 1 | June 30, 2006 | 153% over the limit |
| pH | 3 | 127 | 1 | November 30, 2007 | |
| Solids, total suspended | 3 | 189 | 0 | ||
| BOD, 5-day, 20 deg. C | 0 | 180 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 63 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 19 | 0 | ||
| Nitrogen, ammonia total [as N] | 3 | 12 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 3 | 12 | 0 | ||
| Arsenic, dry weight | 5 | 10 | 0 | ||
| Level of pathogen requirements achieved | 2 | 7 | 0 | ||
| Description of pathogen option used | 2 | 7 | 0 | ||
| Vector attraction reduction alternative used | 2 | 7 | 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 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 6 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 6 | 0 | ||
| Annual amt of sludge incinerated | 1 | 6 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 5 | 0 | ||
| Pollutant table from 503.13 | 1 | 5 | 0 | ||
| Nickel, total [as Ni] | 2 | 4 | 0 | ||
| Annual sludge production, total | 1 | 4 | 0 | ||
| Annual amount of sludge land applied | 1 | 4 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 4 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 4 | 0 | ||
| Annual amt sludge transported interstate | 1 | 4 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 3 | 0 | ||
| Fecal coliform | 1 | 2 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 2 | 0 | ||
| Boundary areas | 1 | 2 | 0 | ||
| Salmonella | 1 | 2 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 |
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 10, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| February 18, 2026 | Evaluation | S |
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES TX0022063.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.