Clean Water Act discharge permit · NPDES ID0020184
WINCHESTER, CITY OF - WINCHESTER WWTP, Winchester, ID: NPDES ID0020184 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 16Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
WINCHESTER, CITY OF - WINCHESTER WWTP, held by WINCHESTER, CITY OF, holds NPDES permit ID0020184, which discharges to Lapwai Creek. EPA’s file records it issued January 14, 2013 and expiring February 28, 2018. 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 | WINCHESTER, CITY OF - WINCHESTER WWTP |
|---|---|
| Permittee as filed | WINCHESTER, CITY OF |
| NPDES ID | ID0020184 |
| 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 14, 2013 |
| Expiration date | February 28, 2018 |
| Address | Winchester, ID 83555 |
| Receiving water | LAPWAI CREEK |
| Subwatershed | Upper Lapwai Creek (HUC 170603061201) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 19Pollutants on file
- 16Under a numeric limit
- 19With a violation of any kind
- 11With 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 | 5 | 298 | 214 | February 28, 2025 | 1,397% over the limit |
| BOD, 5-day, 20 deg. C | 5 | 225 | 148 | April 30, 2019 | 863% over the limit |
| Solids, suspended percent removal | 1 | 103 | 87 | November 30, 2024 | 567% over the limit |
| BOD, 5-day, percent removal | 1 | 81 | 71 | November 30, 2024 | 562% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 85 | 55 | July 31, 2025 | 2,438% over the limit |
| Coliform, fecal MF, MFC broth, 44.5 C | 0 | 71 | 47 | February 29, 2004 | 14,900% over the limit |
| Chlorine, total residual | 4 | 117 | 17 | January 31, 2024 | 11,438% over the limit |
| Floating solids, waste or visible foam-visual | 1 | 18 | 11 | March 31, 2020 | |
| E. coli | 0 | 12 | 10 | April 30, 2011 | 149% over the limit |
| E. coli, MTEC-MF | 2 | 21 | 7 | March 31, 2020 | 149% over the limit |
| Oil and grease visual | 1 | 12 | 6 | March 31, 2020 | 2,147,483,650% over the limit |
| pH | 2 | 43 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 33 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 20 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 19 | 0 | ||
| Phosphorus, total [as P] | 1 | 18 | 0 | ||
| Temperature, water deg. centigrade | 1 | 8 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 6 | 0 | ||
| Oil and grease | 0 | 1 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES ID0020184.
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 ID0020184 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.