Clean Water Act discharge permit · NPDES MO0132497
ROCKPORT SUBDIVISION WWTP, Troy, MO: NPDES MO0132497 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 7Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
ROCKPORT SUBDIVISION WWTP, held by Lincoln County Sewer and Water, LLC, holds NPDES permit MO0132497, which discharges to Sand Run. EPA’s file records it issued February 13, 2019 and expiring December 31, 2023. 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 | ROCKPORT SUBDIVISION WWTP |
|---|---|
| Permittee as filed | Lincoln County Sewer and Water, LLC |
| NPDES ID | MO0132497 |
| 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 | February 13, 2019 |
| Expiration date | December 31, 2023 |
| Address | Troy, MO 63379 |
| Receiving water | Sand Run |
| Subwatershed | Lower Big Creek (HUC 071100080409) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 7Under a numeric limit
- 7With 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 | 17 | 17 | June 30, 2022 | 1,733% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 2 | 2 | August 31, 2008 | 70% over the limit |
| Solids, total suspended | 2 | 2 | 2 | July 31, 2018 | 256% over the limit |
| E. coli | 2 | 7 | 1 | September 30, 2019 | 11% over the limit |
| Chlorine, total residual | 2 | 6 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 2 | 0 | ||
| pH | 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
- 10Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 31, 2025 | Reporting Violations - Failure to Submit DMRs | ST6 |
| August 2, 2024 | Reporting Violations - Failure to Submit DMRs | ST6 |
| January 9, 2024 | Permit Violations - Failure to Submit Timely Permit Renewal Application | ST6 |
| January 9, 2024 | Effluent Violations - Narrative Effluent Violation | ST6 |
| November 20, 2023 | Reporting Violations - Failure to Submit DMRs | ST6 |
| November 10, 2022 | Effluent Violations - Numeric effluent violation | ST6 |
| November 10, 2022 | Effluent Violations - Narrative Effluent Violation | ST6 |
| October 19, 2022 | Effluent Violations - Numeric effluent violation | ST6 |
| March 5, 2021 | Effluent Violations - Numeric effluent violation | ST6 |
| September 30, 2020 | Effluent Violations - Numeric effluent violation | 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 MO0132497 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.