Clean Water Act discharge permit · NPDES MOGDS0171
CEDAR HILL U GAS, Cedar Hill, MO: NPDES MOGDS0171 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
CEDAR HILL U GAS, held by Wallis Petroleum, L.C., holds NPDES permit MOGDS0171, which discharges to Tributary To Skullbones Cr.. EPA’s file records it issued August 1, 2024 and expiring June 30, 2029. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | CEDAR HILL U GAS |
|---|---|
| Permittee as filed | Wallis Petroleum, L.C. |
| NPDES ID | MOGDS0171 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 1, 2024 |
| Expiration date | 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 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 8Pollutants on file
- 8Under a numeric limit
- 4With 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 |
|---|---|---|---|---|---|
| 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 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 3Single-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 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MOGDS0171.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MOGDS0171 there.
Nearby on the register
- Discharge permits in Cedar Hill
- Every permit record in Cedar Hill, A to Z
- Discharge permits in Missouri
- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.