Clean Water Act discharge permit · NPDES TX0128431
MONTGOMERY COUNTY MUD 112 WWTP, Conroe, TX: NPDES TX0128431 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
MONTGOMERY COUNTY MUD 112 WWTP, held by MONTGOMERY COUNTY MUD 112, holds NPDES permit TX0128431, which discharges to Unnamed Trib; West Fork San Jacinto River. EPA’s file records it issued September 6, 2018 and expiring September 6, 2023.
MONTGOMERY COUNTY MUD 112 WWTP, Conroe, Texas: Individual permit TX0128431, held by MONTGOMERY COUNTY MUD 112; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued September 6, 2018, term to September 6, 2023; discharges to UNNAMED TRIB; WEST FORK SAN JACINTO RIVER.
- Nitrogen, ammonia total [as N]: 3 limits, 4 violations of any kind, 4 effluent exceedances, latest February 28, 2023, largest 52% over the limit.
- Flow, in conduit or thru treatment plant: 2 limits, 3 violations of any kind, 3 effluent exceedances, latest March 31, 2026, largest 17% over the limit.
- E. coli: 2 limits, 6 violations of any kind, 2 effluent exceedances, latest September 30, 2011, largest 99,999% over the limit.
- Arsenic, dry weight: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- pH: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Solids, total suspended: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Chlorine, total residual: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Salmonella: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- July 20, 2018: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 863 were issued before TX0128431.
Coverages issued nearest TX0128431
- September 6, 2018: SHELDON WOODS WWTP, Houston, TX0020991, held by SHELDON ROAD MUD
- September 6, 2018: BURTON CREEK WWTP, Bryan, TX0022616, held by CITY OF BRYAN
- September 6, 2018: ROLLING HILLS WWTP, Houston, TX0070165, held by SHELDON ROAD MUD
- September 6, 2018: LUCE BAYOU PUD WWTP, Houston, TX0074870, held by LUCE BAYOU PUD UTILITY
- September 6, 2018: MONTGOMERY COUNTY MUD 105 WASTEWATER TREATMENT PLANT 1, Oak Ridge North, TX0127400, held by MONTGOMERY COUNTY MUD NO 105
- September 11, 2018: HARRIS COUNTY WCID 111 WWTP, Houston, TX0027201, held by HOUSTON, CITY OF
- September 11, 2018: HIGH POINT ELEMENTARY SCHOOL, Navasota, TX0128333, held by NAVASOTA ISD
- September 11, 2018: THOMPSONS CREEK WWTP, Bryan, TX0128554, held by CITY OF BRYAN
- September 12, 2018: GALVESTON COUNTY FWSD 6 WWTP, Village Of Tiki Island, TX0020079, held by GALVESTON COUNTY FWSD 6
- September 12, 2018: BRAZORIA COUNTY MUD 43 WWTP, Manvel, TX0135577, held by BRAZORIA COUNTY MUD 43
MONTGOMERY COUNTY MUD 112 WWTP among its neighbors
EPA’s permit file holds 120 discharge permits in the Stewarts Creek-West Fork San Jacinto River subwatershed (HUC 120401010401), TX0128431 among them. Its county holds 1,439, 16 of them major permits; TX0128431 is a minor permit.
Other permits in the Stewarts Creek-West Fork San Jacinto River subwatershed (HUC 120401010401)
- 12024 S I-45 WWTP, Conroe: TXR1543TV, minor permit, discharging to STEWARTS CREEK, permit term to March 4, 2028
- 1601 HAWTHORNE, Conroe: TXR1511XS, minor permit, discharging to STEWARTS CREEK, permit term to March 4, 2028
- 421 CONROE PARK WEST, Conroe: TXR1510SF, minor permit, discharging to STEWARTS CREEK, permit term to March 4, 2028
- 7810 BLACK OAK DR CONSTRUCTION SITE, Magnolia: TXR1534YN, minor permit, discharging to CREEKWOOD LAKE, permit term to March 4, 2028
- BALL METAL BEVERAGE CONTAINER CONROE FACILITY, Conroe: TXR05HD26, minor permit, permit term to August 13, 2031
- BAUER EQUIPMENT AMERICA, Conroe: TXR05FL07, minor permit, permit term to August 13, 2026
- CALDWELL CORE SERVICES, Conroe: TXRNEBQ82, minor permit, permit term to August 13, 2026
- CAMILLO - RIVERS EDGE, Conroe: TXR1522GT, minor permit, discharging to SAN JAC. RIVER, permit term to March 4, 2023
- CAMP ARNOLD - NEW WELCOME CENTER, Conroe: TXR1544DB, minor permit, discharging to STEWARTS CREEK, permit term to March 4, 2023
- CANTEL 3101 POLLOK, Conroe: TXRNEBM93, minor permit, permit term to August 13, 2026
Identity
| Facility as filed | MONTGOMERY COUNTY MUD 112 WWTP |
|---|---|
| Permittee as filed | MONTGOMERY COUNTY MUD 112 |
| NPDES ID | TX0128431 |
| 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 | September 6, 2018 |
| Expiration date | September 6, 2023 |
| Address | Conroe, TX 77384 |
| Receiving water | UNNAMED TRIB; WEST FORK SAN JACINTO RIVER |
| Subwatershed | Stewarts Creek-West Fork San Jacinto River (HUC 120401010401) |
Effluent limits and exceedances
- 38Pollutants on file
- 38Under a numeric limit
- 3With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 3 | 4 | 4 | February 28, 2023 | 52% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 3 | 3 | March 31, 2026 | 17% over the limit |
| E. coli | 2 | 6 | 2 | September 30, 2011 | 99,999% over the limit |
| Arsenic, dry weight | 5 | 0 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 0 | 0 | ||
| pH | 3 | 0 | 0 | ||
| Solids, total suspended | 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 | ||
| 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 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Fecal coliform | 1 | 0 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 0 | 0 | ||
| Toxicity characteristic leaching procedure | 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 |
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 20, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES TX0128431.
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 TX0128431.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.