Clean Water Act discharge permit · NPDES WI0036552
MAPLE GROVE ESTATES SANITARY DISTRICT, Hamilton, WI: NPDES WI0036552 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 7Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
MAPLE GROVE ESTATES SANITARY DISTRICT, held by Maple Grove Estates Sanitary District, holds NPDES permit WI0036552, which discharges to Pleasant Valley. EPA’s file records it issued May 7, 2014 and expiring March 31, 2019. 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 | MAPLE GROVE ESTATES SANITARY DISTRICT |
|---|---|
| Permittee as filed | Maple Grove Estates Sanitary District |
| NPDES ID | WI0036552 |
| 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 | May 7, 2014 |
| Expiration date | March 31, 2019 |
| Address | Hamilton, WI 54669 |
| Receiving water | PLEASANT VALLEY |
| Subwatershed | Bostwick Creek (HUC 070400060401) |
| SIC | 4952 – Sewerage Systems |
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
- 7Pollutants on file
- 7Under a numeric limit
- 7With 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 |
|---|---|---|---|---|---|
| Chloride [as Cl] | 1 | 95 | 72 | June 30, 2026 | 68% over the limit |
| Solids, total suspended | 4 | 81 | 5 | July 31, 2025 | 105% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 80 | 4 | July 31, 2025 | 106% over the limit |
| pH | 2 | 44 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 38 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 22 | 0 | ||
| Temperature, water deg. fahrenheit | 1 | 9 | 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 WI0036552.
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 WI0036552 there.
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- Every permit record in Wisconsin, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.