NPDES TX0105171 · Clean Water Act
SOUTHSIDE WWTP, Mount Pleasant, TX: NPDES TX0105171 discharge permit, effluent exceedances, inspections, penalties
SOUTHSIDE WWTP, Mount Pleasant, Texas: Individual permit TX0105171, held by CITY OF MOUNT PLEASANT; Publicly owned treatment works; Administratively continued; issued February 24, 2016, term to February 1, 2018; discharges to UNNAMED TRIBUTARY OF HART CREEK.
2 of the 55 pollutants listed for NPDES TX0105171 have no violation or effluent exceedance.
- Nitrogen, ammonia total [as N]: 6 limits, 11 violations of any kind, 11 effluent exceedances, latest August 31, 2010, largest 914% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 7 violations of any kind, 7 effluent exceedances, latest August 31, 2010, largest 257% over the limit.
- Flow, in conduit or thru treatment plant: 4 limits, 3 violations of any kind, 3 effluent exceedances, latest February 29, 2016, largest 5% over the limit.
- Solids, total suspended: 3 limits, 3 violations of any kind, 3 effluent exceedances, latest July 31, 2009, largest 67% over the limit.
- Oxygen, dissolved [DO]: 2 limits, 3 violations of any kind, 3 effluent exceedances, latest August 31, 2010, largest 20% over the limit.
- E. coli: 2 limits, 6 violations of any kind, 2 effluent exceedances, latest June 30, 2024, largest 507% over the limit.
- Chlorine, total residual: 2 limits, 2 violations of any kind, 2 effluent exceedances, latest April 30, 2011, largest 233% over the limit.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 24 violations of any kind.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 24 violations of any kind.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 22 violations of any kind.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 22 violations of any kind.
- Arsenic, dry weight: 5 limits, 12 violations of any kind.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 12 violations of any kind.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 12 violations of any kind.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 12 violations of any kind.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 12 violations of any kind.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 12 violations of any kind.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 10 violations of any kind.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 10 violations of any kind.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 10 violations of any kind.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas: 2 limits, 8 violations of any kind.
- LC50 Pass/Fail Static 24Hr Acute D. Pulex: 1 limit, 7 violations of any kind.
- LC50 Pass/Fail Static 24Hr Acute Pimephales promelas: 1 limit, 7 violations of any kind.
- Selenium, dry weight: 3 limits, 6 violations of any kind.
- Copper, dry weight: 3 limits, 6 violations of any kind.
- Cadmium, dry weight: 3 limits, 6 violations of any kind.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 6 violations of any kind.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 6 violations of any kind.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 6 violations of any kind.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 6 violations of any kind.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 6 violations of any kind.
- Nickel, total [as Ni]: 2 limits, 6 violations of any kind.
- pH: 3 limits, 5 violations of any kind.
- Whole effluent toxicity - retest #1: 3 limits, 5 violations of any kind.
- Whole effluent toxicity - retest #2: 3 limits, 5 violations of any kind.
- Level of pathogen requirements achieved: 2 limits, 5 violations of any kind.
- Description of pathogen option used: 2 limits, 5 violations of any kind.
- Vector attraction reduction alternative used: 2 limits, 5 violations of any kind.
- Polychlorinated biphenyls [PCBs]: 1 limit, 5 violations of any kind.
- Toxicity characteristic leaching procedure: 1 limit, 4 violations of any kind.
- Ann. amt sludge disposed by other method: 1 limit, 4 violations of any kind.
- Annual amt of sludge incinerated: 1 limit, 4 violations of any kind.
- Annual sludge production, total: 1 limit, 4 violations of any kind.
- Annual amount of sludge land applied: 1 limit, 4 violations of any kind.
- Annual amt. sludge disposed surface unit: 1 limit, 4 violations of any kind.
- Annual amt sludge disposed in landfill: 1 limit, 4 violations of any kind.
- Annual amt sludge transported interstate: 1 limit, 4 violations of any kind.
- Compliance w/part 258 sludge requirement: 1 limit, 4 violations of any kind.
- Unit w/liner/leachate collection system: 1 limit, 3 violations of any kind.
- Boundary areas: 1 limit, 3 violations of any kind.
- Fecal coliform: 1 limit, 2 violations of any kind.
- Salmonella: 1 limit, 2 violations of any kind.
- Pollutant table from 503.13: 1 limit, 2 violations of any kind.
- Phosphorus, total [as P]: 3 limits.
- Annual whole sludge application rate: 1 limit.
- March 12, 2026: Focused (S).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 225 were issued before TX0105171.
Coverages issued nearest TX0105171
- 2016-02-19: CITY OF DE KALB WWTP, De Kalb: TX0069671, held by DE KALB, CITY OF
- 2016-02-19: BEACH CREEK WWTP, Linden: TX0105091, held by LINDEN, CITY OF
- 2016-02-19: LAWN WTP, Lawn: TX0133396, held by LAWN, CITY OF
- 2016-02-23: CITY OF DODD CITY WWTF, Dodd City: TX0057169, held by DODD CITY, CITY OF
- 2016-02-24: SPARKS BRANCH WWTF, Pittsburg: TX0025437, held by CITY OF PITTSBURG
- 2016-03-09: QUITMAN WWTP, Quitman: TX0022748, held by QUITMAN, CITY OF
- 2016-03-09: RICE CREEK WWTF, New Boston: TX0136409, held by NEW BOSTON, CITY OF
- 2016-03-14: CITY OF EMORY WWTP, East Tawakoni: TX0002658, held by EMORY, CITY OF
- 2016-03-14: ROYSE CITY WWTF, Royse City: TX0021687, held by ROYSE CITY, CITY OF
- 2016-03-14: CITY OF QUANAH WWTP, Quanah: TX0024139, held by QUANAH, CITY OF
SOUTHSIDE WWTP among its neighbors
7 discharge permits are in the Walkers Creek-Big Cypress Creek subwatershed (HUC 111403050303); TX0105171 is one. Its county: 32, 3 major; TX0105171 is major permit.
Other permits in the Walkers Creek-Big Cypress Creek subwatershed (HUC 111403050303)
- ALPHIA, Pittsburg: TXR05GR85, minor, term to 2026-08-13
- ALPHIA, Pittsburg: TXR1596UE, minor, term to 2028-03-04
- CITY OF PITTSBURG SPARKS BRANCH WASTEWATER TREATMENT PLANT, Pittsburg: TXR05FS20, minor, term to 2026-08-13
- DRY CREEK WWTP, Pittsburg: TX0025445, minor, term to 2026-03-30
- PITTSBURG ISD HS RENOV & JHS EXPAN, Pittsburg: TXR1582TW, minor, term to 2028-03-04
- SPARKS BRANCH WWTF, Pittsburg: TX0025437, major, term to 2021-02-01
Identity
| Facility | SOUTHSIDE WWTP |
|---|---|
| Permittee | CITY OF MOUNT PLEASANT |
| NPDES ID | TX0105171 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Major |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | February 24, 2016 |
| Expires | February 1, 2018 |
| Address | Mount Pleasant, TX 75455 |
| Receiving water | UNNAMED TRIBUTARY OF HART CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Walkers Creek-Big Cypress Creek (HUC 111403050303) |
| SIC | 4952 – Sewerage Systems |
NPDES TX0105171: effluent limits and exceedances
SOUTHSIDE WWTP (NPDES TX0105171): 55 pollutants on file, 55 limited; 53 with a violation of any kind, 7 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 6 | 11 | 11 | August 31, 2010 | 914% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 7 | 7 | August 31, 2010 | 257% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 3 | 3 | February 29, 2016 | 5% over the limit |
| Solids, total suspended | 3 | 3 | 3 | July 31, 2009 | 67% over the limit |
| Oxygen, dissolved [DO] | 2 | 3 | 3 | August 31, 2010 | 20% over the limit |
| E. coli | 2 | 6 | 2 | June 30, 2024 | 507% over the limit |
| Chlorine, total residual | 2 | 2 | 2 | April 30, 2011 | 233% over the limit |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 24 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 24 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 2 | 22 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 2 | 22 | 0 | ||
| Arsenic, dry weight | 5 | 12 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 12 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 12 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 12 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 12 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 12 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 10 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 10 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 10 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 2 | 8 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 7 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 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 | ||
| Nickel, total [as Ni] | 2 | 6 | 0 | ||
| pH | 3 | 5 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 5 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 5 | 0 | ||
| Level of pathogen requirements achieved | 2 | 5 | 0 | ||
| Description of pathogen option used | 2 | 5 | 0 | ||
| Vector attraction reduction alternative used | 2 | 5 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 5 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 4 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 4 | 0 | ||
| Annual amt of sludge incinerated | 1 | 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 | 4 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 3 | 0 | ||
| Boundary areas | 1 | 3 | 0 | ||
| Fecal coliform | 1 | 2 | 0 | ||
| Salmonella | 1 | 2 | 0 | ||
| Pollutant table from 503.13 | 1 | 2 | 0 | ||
| Phosphorus, total [as P] | 3 | 0 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 |
NPDES TX0105171: inspections, violations and enforcement
NPDES TX0105171: 1 inspection
| Date | What EPA recorded | Agency |
|---|---|---|
| March 12, 2026 | Focused | S |
NPDES TX0105171 (SOUTHSIDE WWTP): no single-event violation, formal enforcement action and informal enforcement action on file.
Watch NPDES TX0105171
NPDES TX0105171: one email when its EPA record changes — $99/month.
Permits near NPDES TX0105171
NPDES TX0105171: 55 pollutant rows, 1 dated events; ICIS-NPDES download, loaded October 14, 2026.