Clean Water Act discharge permit · NPDES MO0099732
POTOSI WWTF #2, Mineral Point, MO: NPDES MO0099732 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 42Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
POTOSI WWTF #2, held by City of Potosi, holds NPDES permit MO0099732, which discharges to W. Br. Mill Cr.. EPA’s file records it issued January 9, 2018 and expiring December 31, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | POTOSI WWTF #2 |
|---|---|
| Permittee as filed | City of Potosi |
| NPDES ID | MO0099732 |
| 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 | January 9, 2018 |
| Expiration date | December 31, 2022 |
| Address | Mineral Point, MO 63660 |
| Receiving water | W. Br. Mill Cr. |
| Subwatershed | Mill Creek (HUC 071401040301) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 45Pollutants on file
- 42Under a numeric limit
- 43With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 0 | 12 | 12 | August 31, 2016 | 660% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 11 | 7 | May 31, 2026 | 2,027% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 12 | 2 | September 30, 2015 | 1,907% over the limit |
| E. coli | 2 | 4 | 2 | October 31, 2019 | 26% over the limit |
| Chlorine, total residual | 0 | 2 | 2 | September 30, 2015 | 174% over the limit |
| Ammonia [as N] + unionized ammonia | 0 | 2 | 2 | July 31, 2012 | 426% over the limit |
| Nitrogen, nitrite total [as N] | 4 | 24 | 0 | ||
| Phosphorus, total [as P] | 4 | 24 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 14 | 0 | ||
| Sulfate [as S] | 2 | 12 | 0 | ||
| Arsenic, total recoverable | 2 | 12 | 0 | ||
| Cobalt, total recoverable | 2 | 12 | 0 | ||
| Iron, total recoverable | 2 | 12 | 0 | ||
| Selenium, total recoverable | 2 | 12 | 0 | ||
| Thallium, total recoverable | 2 | 12 | 0 | ||
| Beryllium, total recoverable [as Be] | 2 | 12 | 0 | ||
| Boron, total recoverable | 2 | 12 | 0 | ||
| Nickel, total recoverable | 2 | 12 | 0 | ||
| Silver total recoverable | 2 | 12 | 0 | ||
| Zinc, total recoverable | 2 | 12 | 0 | ||
| Aluminum, total recoverable | 2 | 12 | 0 | ||
| Cadmium, total recoverable | 2 | 12 | 0 | ||
| Lead, total recoverable | 2 | 12 | 0 | ||
| Copper, total recoverable | 2 | 12 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 2 | 12 | 0 | ||
| Antimony, total recoverable | 2 | 12 | 0 | ||
| Chromium, trivalent total recoverable | 2 | 12 | 0 | ||
| Manganese, total recoverable | 2 | 12 | 0 | ||
| Toluene | 2 | 12 | 0 | ||
| Benzene | 2 | 12 | 0 | ||
| Ethylbenzene | 2 | 12 | 0 | ||
| Phenol | 2 | 12 | 0 | ||
| Naphthalene | 2 | 12 | 0 | ||
| Chloride | 2 | 12 | 0 | ||
| Mercury, total recoverable | 2 | 12 | 0 | ||
| Cyanide, total recoverable | 2 | 12 | 0 | ||
| Xylene [mix of m+o+p] | 2 | 12 | 0 | ||
| Solids, total suspended | 2 | 10 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 10 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 10 | 0 | ||
| pH | 2 | 8 | 0 | ||
| BOD, 5-day, percent removal | 1 | 2 | 0 | ||
| Solids, suspended percent removal | 1 | 2 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 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
- 5Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 3, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 24, 2021 | Permit Violations - Violation Specified in Comment | ST6 |
| March 24, 2021 | Effluent Violations - Numeric effluent violation | ST6 |
| March 24, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| June 30, 2020 | Reporting Violations - Improper/ Incorrect Reporting | 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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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.