Clean Water Act discharge permit · NPDES MO0099163
OZARK WWTF, Ozark, MO: NPDES MO0099163 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 20Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
OZARK WWTF, held by City of Ozark, holds NPDES permit MO0099163, 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 (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | OZARK WWTF |
|---|---|
| Permittee as filed | City of Ozark |
| NPDES ID | MO0099163 |
| 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 | Spout Spring Hollow-Finley Creek (HUC 110100020208) |
| Program components on file | Biosolids, POTW |
| 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
- 27Pollutants on file
- 20Under a numeric limit
- 21With a violation of any kind
- 6With 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 | 14 | 10 | February 28, 2025 | 383% over the limit |
| Ammonia [as N] + unionized ammonia | 0 | 29 | 7 | March 31, 2014 | 214% over the limit |
| Phosphorus, total [as P] | 4 | 23 | 5 | November 30, 2023 | 182% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 7 | 2 | November 30, 2023 | 250% over the limit |
| pH | 2 | 6 | 2 | November 30, 2015 | |
| BOD, 5-day, percent removal | 1 | 2 | 1 | November 30, 2023 | 60% over the limit |
| Nitrogen, total [as N] | 4 | 30 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 24 | 0 | ||
| Coliform, fecal general | 0 | 12 | 0 | ||
| Aluminum, total recoverable | 4 | 6 | 0 | ||
| Solids, total suspended | 3 | 5 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| E. coli | 2 | 4 | 0 | ||
| Iron, total recoverable | 0 | 4 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 2 | 0 | ||
| Solids, suspended percent removal | 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 | ||
| Cyanide, free [amenable to chlorination] | 2 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 0 | 0 | ||
| Selenium, total recoverable | 2 | 0 | 0 | ||
| Silver total recoverable | 2 | 0 | 0 | ||
| Zinc, total recoverable | 2 | 0 | 0 | ||
| Cadmium, total recoverable | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 7, 2026 | 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, MO0099163.
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 MO0099163 there.
Nearby on the register
- Discharge permits in Ozark
- Every permit record in Ozark, 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.