Clean Water Act discharge permit · NPDES WI0031500
MILAN S D WASTEWATER TREATMENT FACILITY, Marathon County, WI: NPDES WI0031500 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
MILAN S D WASTEWATER TREATMENT FACILITY, held by Milan S D, Athens, WI, holds NPDES permit WI0031500, which discharges to Randall Cr Via U. EPA’s file records it issued December 13, 2012 and expiring December 31, 2017. 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 | MILAN S D WASTEWATER TREATMENT FACILITY |
|---|---|
| Permittee as filed | Milan S D, Athens, WI |
| NPDES ID | WI0031500 |
| 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 | December 13, 2012 |
| Expiration date | December 31, 2017 |
| Address | Marathon County, WI 54411 |
| Receiving water | RANDALL CR VIA U |
| Subwatershed | Randall Creek (HUC 070700021503) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 10Pollutants on file
- 9Under a numeric limit
- 10With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 1 | 23 | 3 | September 30, 2022 | 13% over the limit |
| Oxygen, dissolved [DO] | 0 | 3 | 3 | July 31, 1990 | 58% over the limit |
| Solids, total suspended | 4 | 66 | 1 | May 31, 1990 | 10% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 59 | 0 | ||
| pH | 2 | 38 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 18 | 0 | ||
| Flow, in conduit or thru treatment plant | 3 | 8 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 6 | 0 | ||
| Chloride [as Cl] | 1 | 6 | 0 | ||
| Copper, total recoverable | 1 | 6 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 26, 2025 | WW SSO - Discharge to Waters | ST6 |
| August 27, 2024 | WW SSO - Discharge to Waters | 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 WI0031500 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.