Clean Water Act discharge permit · NPDES MO0048224
RIDGEWAY WEST WWTF, Ridgeway, MO: NPDES MO0048224 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
RIDGEWAY WEST WWTF, held by City of Ridgeway, holds NPDES permit MO0048224, which discharges to Tributary To East Fork Big Creek. EPA’s file records it issued January 19, 2017 and expiring December 31, 2021. 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 | RIDGEWAY WEST WWTF |
|---|---|
| Permittee as filed | City of Ridgeway |
| NPDES ID | MO0048224 |
| 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 19, 2017 |
| Expiration date | December 31, 2021 |
| Address | Ridgeway, MO 64481 |
| Receiving water | Tributary to East Fork Big Creek |
| Subwatershed | East Fork Big Creek (HUC 102801010907) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 11Pollutants on file
- 11Under a numeric limit
- 10With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 2 | 18 | 14 | October 31, 2024 | 206% over the limit |
| BOD, 5-day, percent removal | 1 | 11 | 9 | July 31, 2025 | 217% over the limit |
| Solids, suspended percent removal | 1 | 6 | 4 | June 30, 2025 | 89% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 9 | 3 | April 30, 2025 | 25% over the limit |
| pH | 1 | 48 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 6 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 4 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 4 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 1 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 1 | 0 | ||
| E. coli | 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
- 8Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 19, 2024 | Permit Violations - Unapproved Operation | ST6 |
| April 19, 2024 | Permit Violations - Failure to Submit Timely Permit Renewal Application | ST6 |
| June 30, 2022 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| September 30, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| July 25, 2019 | Effluent Violations - Numeric effluent violation | ST6 |
| July 25, 2019 | Reporting Violations - Failure to Submit DMRs | ST6 |
| July 25, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| July 25, 2019 | Permit Violations - Violation Specified in Comment | 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 MO0048224 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.