NPDES MOGDS0171 · Clean Water Act
CEDAR HILL U GAS, Cedar Hill, MO: NPDES MOGDS0171 discharge permit, effluent exceedances, inspections, penalties
CEDAR HILL U GAS, Cedar Hill, Missouri: General permit coverage MOGDS0171, held by Wallis Petroleum, L.C.; Effective; issued August 1, 2024, term to June 30, 2029; discharges to Tributary to Skullbones Cr.; Sewage Treatment Facilities.
4 of the 8 pollutants listed for NPDES MOGDS0171 have no violation or effluent exceedance.
- Nitrogen, ammonia total [as N]: 8 limits, 7 violations of any kind, 7 effluent exceedances, latest June 30, 2026, largest 764% over the limit.
- BOD, 5-day, 20 deg. C: 2 limits, 5 violations of any kind, 5 effluent exceedances, latest March 31, 2026, largest 1,120% over the limit.
- Solids, total suspended: 2 limits, 4 violations of any kind, 4 effluent exceedances, latest March 31, 2026, largest 1,767% over the limit.
- E. coli: 2 limits, 2 violations of any kind, 2 effluent exceedances, latest March 31, 2025, largest 4,765% over the limit.
- Oxygen, dissolved [DO]: 2 limits.
- pH: 2 limits.
- Flow, in conduit or thru treatment plant: 2 limits.
- Chlorine, total residual: 2 limits.
- July 7, 2026: Effluent Violations - Numeric effluent violation (ST6).
- February 3, 2026: Effluent Violations - Numeric effluent violation (ST6).
- March 31, 2025: Effluent Violations - Numeric effluent violation (ST6).
CEDAR HILL U GAS among its neighbors
43 discharge permits are in the Big River subwatershed (HUC 071401040407); MOGDS0171 is one. Its county: 475, 6 major; MOGDS0171 is minor permit.
Other permits in the Big River subwatershed (HUC 071401040407)
- ABR SEPTIC SERVICE INC, Grubville: MOG821209, minor, term to 2022-11-30
- ANSELMAN PROPERTY WWTF, House Springs: MO0129097, minor, term to 2023-06-30
- ARNOLD READY MIX CEDAR HILL, Cedar Hill: MOG490359, minor, term to 2022-04-30
- BIG RIVER AMBULANCE DISTRICT, Cedar Hill: MORA24879, minor, term to 2027-02-07
- BLUFFS WASTEWATER TREATMENT FACILITY, Eureka: MO0131253, minor, term to 2023-06-30
- BONACKER FARMS INC., House Springs: MO0139564, minor, term to 2023-06-30
- CAMP SKULLBONES LLC, Dittmer: MOG760226, minor, term to 2024-07-31
- CAMP SUNNYHILL ADVENTURE CAMP WWTP, Dittmer: MO0101893, minor, term to 2018-06-30
- CAMP SUNNYHILL ADVENTURE CAMP WWTP, Dittmer: MOGDS0206, minor, term to 2029-06-30
- CEDAR HILL DG, Cedar Hill: MORA28866, minor, term to 2027-02-07
Identity
| Facility | CEDAR HILL U GAS |
|---|---|
| Permittee | Wallis Petroleum, L.C. |
| NPDES ID | MOGDS0171 |
| Status | Effective |
| Type | General permit coverage |
| Class | Minor |
| Facility type | Non-POTW |
| Issued | August 1, 2024 |
| Expires | June 30, 2029 |
| Address | Cedar Hill, MO 63016 |
| Receiving water | Tributary to Skullbones Cr. |
| Subwatershed | Big River (HUC 071401040407) |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
NPDES MOGDS0171: effluent limits and exceedances
CEDAR HILL U GAS (NPDES MOGDS0171): 8 pollutants on file, 8 limited; 4 with a violation of any kind, 4 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 8 | 7 | 7 | June 30, 2026 | 764% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 5 | 5 | March 31, 2026 | 1,120% over the limit |
| Solids, total suspended | 2 | 4 | 4 | March 31, 2026 | 1,767% over the limit |
| E. coli | 2 | 2 | 2 | March 31, 2025 | 4,765% over the limit |
| Oxygen, dissolved [DO] | 2 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Chlorine, total residual | 2 | 0 | 0 |
NPDES MOGDS0171: inspections, violations and enforcement
NPDES MOGDS0171: 3 single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 7, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| February 3, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| March 31, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
NPDES MOGDS0171 (CEDAR HILL U GAS): no inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES MOGDS0171
NPDES MOGDS0171: one email when its EPA record changes — $99/month.
Permits near NPDES MOGDS0171
NPDES MOGDS0171: 8 pollutant rows, 3 dated events; ICIS-NPDES download, loaded October 14, 2026.