Clean Water Act discharge permit · NPDES ID0021831
MIDDLETON, CITY OF - MIDDLETON WWTP, Middleton, ID: NPDES ID0021831 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
MIDDLETON, CITY OF - MIDDLETON WWTP, held by MIDDLETON, CITY OF, holds NPDES permit ID0021831, which discharges to Boise River. EPA’s file records it issued September 30, 1999 and expiring November 2, 2004. 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 | MIDDLETON, CITY OF - MIDDLETON WWTP |
|---|---|
| Permittee as filed | MIDDLETON, CITY OF |
| NPDES ID | ID0021831 |
| 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 | September 30, 1999 |
| Expiration date | November 2, 2004 |
| Address | Middleton, ID 83644 |
| Receiving water | BOISE RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Mill Slough-Boise River (HUC 170501140410) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 13Pollutants on file
- 13Under a numeric limit
- 13With 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 | 6 | 405 | 66 | May 31, 2013 | 99,999% over the limit |
| Coliform, fecal MF, MFC broth, 44.5 C | 6 | 176 | 29 | October 31, 2020 | 99,999% over the limit |
| pH | 2 | 131 | 17 | March 31, 2016 | |
| BOD, 5-day, percent removal | 1 | 69 | 10 | May 31, 2013 | 40% over the limit |
| Solids, total suspended | 4 | 225 | 9 | April 30, 2013 | 171% over the limit |
| Chlorine, total residual | 3 | 114 | 6 | October 31, 2005 | 100% over the limit |
| Temperature, water deg. centigrade | 2 | 93 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 59 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 47 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 3 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 3 | 0 | ||
| Phosphate, ortho [as PO4] | 1 | 3 | 0 | ||
| Phosphorus, total [as P] | 1 | 3 | 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 ID0021831.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, ID0021831.
Start the watch
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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 ID0021831 there.
Nearby on the register
- Discharge permits in Middleton
- Every permit record in Middleton, A to Z
- Discharge permits in Idaho
- Every permit record in Idaho, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.