Clean Water Act discharge permit · NPDES MO0093599
WENTZVILLE WATER RECLAMATION CENTER, Wentzville, MO: NPDES MO0093599 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 19Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
WENTZVILLE WATER RECLAMATION CENTER, held by City of Wentzville, holds NPDES permit MO0093599, which discharges to Mccoy Cr.. EPA’s file records it issued May 14, 2020 and expiring March 31, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | WENTZVILLE WATER RECLAMATION CENTER |
|---|---|
| Permittee as filed | City of Wentzville |
| NPDES ID | MO0093599 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 14, 2020 |
| Expiration date | March 31, 2024 |
| Address | Wentzville, MO 63385 |
| Receiving water | McCoy Cr. |
| Subwatershed | McCoy Creek (HUC 071100080408) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 33Pollutants on file
- 19Under a numeric limit
- 28With a violation of any kind
- 11With 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 |
|---|---|---|---|---|---|
| Copper, total recoverable | 2 | 21 | 15 | June 30, 2026 | 721% over the limit |
| Silver total recoverable | 0 | 28 | 12 | August 31, 2007 | 22% over the limit |
| Nitrogen, ammonia total [as N] | 16 | 15 | 10 | September 30, 2014 | 286% over the limit |
| Ammonia [as N] + unionized ammonia | 0 | 9 | 9 | December 31, 2013 | 925% over the limit |
| Solids, total suspended | 3 | 15 | 5 | December 31, 2020 | 233% over the limit |
| Chromium, total recoverable | 0 | 8 | 4 | March 31, 2004 | 74% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 24 | 3 | March 31, 2013 | 63% over the limit |
| Zinc, total recoverable | 0 | 18 | 2 | March 31, 2004 | 112% over the limit |
| Cyanide, free [amenable to chlorination] | 0 | 16 | 2 | March 31, 2004 | 7% over the limit |
| Oil and grease [soxhlet extr.] tot. | 2 | 14 | 2 | December 31, 2004 | 71% over the limit |
| Solids, settleable | 0 | 6 | 2 | September 30, 2007 | 447% over the limit |
| pH | 3 | 104 | 0 | ||
| Nickel, total recoverable | 0 | 14 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 0 | 10 | 0 | ||
| Chromium, trivalent total recoverable | 0 | 10 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 9 | 0 | ||
| Arsenic, total recoverable | 2 | 6 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 2 | 0 | ||
| Phosphorus, total [as P] | 4 | 2 | 0 | ||
| Selenium, total recoverable | 4 | 2 | 0 | ||
| E. coli, colony forming units [CFU] | 0 | 2 | 0 | ||
| Toxicity [chronic], Ceriodaphnia dubia | 1 | 1 | 0 | ||
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | 1 | 1 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 0 | 1 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 0 | 1 | 0 | ||
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 0 | 1 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 0 | 1 | 0 | ||
| E. coli | 2 | 0 | 0 | ||
| Temperature, water deg. centigrade | 1 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 0 | 0 | ||
| BOD, 5-day, percent removal | 1 | 0 | 0 | ||
| Solids, suspended percent removal | 1 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 14, 2022 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| January 14, 2022 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| August 8, 2019 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| March 16, 2017 | Pretreatment - Failure to Develop/Enforce Standards | 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, MO0093599.
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 MO0093599 there.
Nearby on the register
- Discharge permits in Wentzville
- Every permit record in Wentzville, A to Z
- Discharge permits in Missouri
- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.