Clean Water Act discharge permit · NPDES MO0109975
MDC, POWDER VALLEY NATURE CENTER, Kirkwood, MO: NPDES MO0109975 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
MDC, POWDER VALLEY NATURE CENTER, held by Missouri Department of Conservation, holds NPDES permit MO0109975, which discharges to Tributary To Meramec River. EPA’s file records it issued January 23, 2019 and expiring December 31, 2022. 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 | MDC, POWDER VALLEY NATURE CENTER |
|---|---|
| Permittee as filed | Missouri Department of Conservation |
| NPDES ID | MO0109975 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | January 23, 2019 |
| Expiration date | December 31, 2022 |
| Address | Kirkwood, MO 63122 |
| Receiving water | Tributary to Meramec River |
| Subwatershed | Sugar Creek-Meramec River (HUC 071401021003) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 11Pollutants on file
- 10Under a numeric limit
- 11With a violation of any kind
- 8With 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] | 4 | 39 | 13 | March 31, 2025 | 5,823% over the limit |
| Chlorine, total residual | 2 | 32 | 10 | June 30, 2011 | 1,150% over the limit |
| E. coli | 2 | 29 | 9 | June 30, 2018 | 77,678% over the limit |
| Coliform, fecal general | 0 | 10 | 6 | June 30, 2015 | 2,499,900% over the limit |
| pH | 2 | 37 | 4 | December 31, 2016 | |
| Solids, total suspended | 2 | 40 | 3 | December 31, 2024 | 167% over the limit |
| BOD, 5-day, percent removal | 1 | 12 | 1 | December 31, 2024 | 33% over the limit |
| Solids, suspended percent removal | 1 | 12 | 1 | December 31, 2024 | 140% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 37 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 28 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 24 | 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
- 10Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 15, 2023 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| December 15, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| December 15, 2023 | Reporting Violations - Failure to Submit DMRs | ST6 |
| November 20, 2023 | Reporting Violations - Failure to Submit DMRs | ST6 |
| February 6, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| October 19, 2022 | Effluent Violations - Numeric effluent violation | ST6 |
| October 15, 2021 | Reporting Violations - Failure to Submit DMRs | ST6 |
| February 15, 2018 | Reporting Violations - Failure to Submit DMRs | ST6 |
| February 15, 2018 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| January 26, 2018 | 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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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 MO0109975 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.