Clean Water Act discharge permit · NPDES MO0030970
ST. PETERS SPENCER CREEK WWTP, St Peters, MO: NPDES MO0030970 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 13Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
ST. PETERS SPENCER CREEK WWTP, held by City of St Peters, holds NPDES permit MO0030970, which discharges to Spencer Creek. EPA’s file records it issued August 20, 2020 and expiring December 31, 2024. 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 | ST. PETERS SPENCER CREEK WWTP |
|---|---|
| Permittee as filed | City of St Peters |
| NPDES ID | MO0030970 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 20, 2020 |
| Expiration date | December 31, 2024 |
| Address | St Peters, MO 63376 |
| Receiving water | Spencer Creek |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Lower Dardenne Creek (HUC 071100090105) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 19Pollutants on file
- 13Under a numeric limit
- 15With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 3 | 56 | 8 | January 31, 2017 | 2,400% over the limit |
| Solids, total suspended | 3 | 55 | 7 | April 30, 2014 | 5,367% over the limit |
| Ammonia [as N] + unionized ammonia | 0 | 33 | 3 | November 30, 2009 | 86% over the limit |
| E. coli, colony forming units [CFU] | 0 | 3 | 3 | April 30, 2014 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 6 | 12 | 2 | August 31, 2012 | 166% over the limit |
| E. coli | 2 | 2 | 2 | May 31, 2019 | 67% over the limit |
| pH | 2 | 66 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 32 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 10 | 0 | ||
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 0 | 5 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 0 | 5 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Phosphorus, total [as P] | 4 | 2 | 0 | ||
| Chloride | 2 | 2 | 0 | ||
| Nitrogen, total [as N] | 0 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 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
- 9Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 2, 2026 | Effluent Violations - Narrative Effluent Violation | ST6 |
| November 12, 2025 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| November 12, 2025 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| March 26, 2025 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| March 26, 2025 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| January 11, 2024 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| September 30, 2022 | Permit Violations - Violation Specified in Comment | ST6 |
| September 30, 2022 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| August 27, 2018 | WW SSO - Failure to report violation that may endanger public health 122.41(l)(7) | 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 MO0030970 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.