Clean Water Act discharge permit · NPDES MO0041076
CLARENCE WWTF, Clarence, MO: NPDES MO0041076 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
CLARENCE WWTF, held by City of Clarence, holds NPDES permit MO0041076, which discharges to Tributary To Cat Branch. EPA’s file records it issued June 12, 2018 and expiring December 31, 2022. 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 | CLARENCE WWTF |
|---|---|
| Permittee as filed | City of Clarence |
| NPDES ID | MO0041076 |
| 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 | June 12, 2018 |
| Expiration date | December 31, 2022 |
| Address | Clarence, MO 63437 |
| Receiving water | Tributary to Cat Branch |
| Subwatershed | Tenmile Creek (HUC 071100050301) |
| 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
- 13Pollutants on file
- 10Under a numeric limit
- 13With 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 |
|---|---|---|---|---|---|
| Ammonia [as N] + unionized ammonia | 0 | 7 | 7 | May 31, 2017 | 359% over the limit |
| Nitrogen, ammonia total [as N] | 32 | 16 | 6 | March 31, 2026 | 70% over the limit |
| Oil and grease [soxhlet extr.] tot. | 8 | 7 | 3 | October 31, 2011 | 60% over the limit |
| pH | 4 | 63 | 2 | October 31, 2011 | |
| BOD, 5-day, 20 deg. C | 8 | 10 | 0 | ||
| Solids, total suspended | 8 | 10 | 0 | ||
| Phosphorus, total [as P] | 8 | 8 | 0 | ||
| Flow, in conduit or thru treatment plant | 8 | 8 | 0 | ||
| Nitrogen, nitrite total [as N] | 8 | 6 | 0 | ||
| BOD, 5-day, percent removal | 4 | 4 | 0 | ||
| Solids, suspended percent removal | 4 | 4 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 2 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 1, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| March 31, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| April 2, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| April 2, 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.
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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 MO0041076 there.
Nearby on the register
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- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.