Clean Water Act discharge permit · NPDES MO0133671
ELK VALLEY WWTF, Ozark, MO: NPDES MO0133671 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 19Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
ELK VALLEY WWTF, held by City of Ozark, holds NPDES permit MO0133671, which discharges to Finley Cr.. EPA’s file records it issued October 1, 2023 and expiring September 30, 2028. 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 | ELK VALLEY WWTF |
|---|---|
| Permittee as filed | City of Ozark |
| NPDES ID | MO0133671 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | October 1, 2023 |
| Expiration date | September 30, 2028 |
| Address | Ozark, MO 65721 |
| Receiving water | Finley Cr. |
| Subwatershed | Elk Valley (HUC 110100020207) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 24Pollutants on file
- 19Under a numeric limit
- 16With a violation of any kind
- 5With 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] | 6 | 10 | 2 | January 31, 2026 | 55% over the limit |
| Phosphorus, total [as P] | 4 | 14 | 1 | July 31, 2020 | 8% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 11 | 1 | June 30, 2024 | 45% over the limit |
| pH | 2 | 11 | 1 | April 30, 2020 | |
| E. coli | 2 | 1 | 1 | October 31, 2018 | 13% over the limit |
| Solids, total suspended | 3 | 10 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 10 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 10 | 0 | ||
| Iron, total recoverable | 0 | 10 | 0 | ||
| Ammonia [as N] + unionized ammonia | 0 | 10 | 0 | ||
| Coliform, fecal general | 0 | 10 | 0 | ||
| Nitrogen, total [as N] | 4 | 8 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 8 | 0 | ||
| Aluminum, total recoverable | 2 | 8 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 0 | 3 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 0 | 3 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 0 | 0 | ||
| Cyanide, free [amenable to chlorination] | 2 | 0 | 0 | ||
| Silver total recoverable | 2 | 0 | 0 | ||
| Zinc, total recoverable | 2 | 0 | 0 | ||
| Cadmium, total recoverable | 2 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MO0133671.
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 MO0133671 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.