Clean Water Act discharge permit · NPDES MO0134309
KEYSTONE ESTATES WWTP, Old Monroe, MO: NPDES MO0134309 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
KEYSTONE ESTATES WWTP, held by Keystone Estates Property Owner's Assoc, holds NPDES permit MO0134309, which discharges to Tributary To Jordan Branch. EPA’s file records it issued November 14, 2018 and expiring September 30, 2023. 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 | KEYSTONE ESTATES WWTP |
|---|---|
| Permittee as filed | Keystone Estates Property Owner's Assoc |
| NPDES ID | MO0134309 |
| 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 |
| Issued | November 14, 2018 |
| Expiration date | September 30, 2023 |
| Address | Old Monroe, MO 63369 |
| Receiving water | Tributary to Jordan Branch |
| Subwatershed | Cuivre River (HUC 071100080411) |
| SIC | 8641 – Civic And Social Associations |
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
- 8Pollutants on file
- 8Under a numeric limit
- 8With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 4 | 34 | 4 | May 31, 2026 | 186% over the limit |
| E. coli | 2 | 33 | 3 | December 31, 2023 | 64,662% over the limit |
| Solids, total suspended | 2 | 32 | 2 | February 28, 2019 | 13% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 31 | 1 | February 28, 2019 | 40% over the limit |
| Oxygen, dissolved [DO] | 2 | 30 | 0 | ||
| pH | 2 | 30 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 30 | 0 | ||
| Chlorine, total residual | 2 | 30 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 12, 2022 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| October 13, 2021 | Effluent Violations - Numeric effluent violation | ST6 |
| June 29, 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.
Watch this permit
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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 MO0134309 there.
Nearby on the register
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- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.