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Sewage treatment plant, Thorp, Wisconsin. NPDES permit WI0025615 expired Jun 30, 2023; its limits still apply. Last 12 months: over a limit 25 times (last June 2026), 104 required values missing, 17 of 34 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | BOD, 5-day, 20 deg. C, monthly average | 58 | ≤ 30 mg/L | 93% |
| October 2025 | BOD, 5-day, 20 deg. C, weekly average | 66.3333 | ≤ 45 mg/L | 47% |
| October 2025 | Phosphorus, total [as P], monthly average | .9336 | ≤ .51 mg/L | 83% |
| October 2025 | Solids, total suspended, monthly average | 39.3571 | ≤ 30 mg/L | 31% |
| October 2025 | Solids, total suspended, weekly average | 57.6667 | ≤ 45 mg/L | 28% |
| November 2025 | BOD, 5-day, 20 deg. C, monthly average | 59.8333 | ≤ 30 mg/L | 99% |
| November 2025 | BOD, 5-day, 20 deg. C, weekly average | 70.6667 | ≤ 45 mg/L | 57% |
| November 2025 | Phosphorus, total [as P], monthly average | .5143 | ≤ .51 mg/L | 1% |
| December 2025 | BOD, 5-day, 20 deg. C, monthly average | 54.2 | ≤ 30 mg/L | 81% |
| December 2025 | BOD, 5-day, 20 deg. C, weekly average | < 65 | ≤ 45 mg/L | 44% |
| January 2026 | BOD, 5-day, 20 deg. C, monthly average | 54.1667 | ≤ 30 mg/L | 81% |
| January 2026 | BOD, 5-day, 20 deg. C, weekly average | 56 | ≤ 45 mg/L | 24% |
| February 2026 | BOD, 5-day, 20 deg. C, monthly average | 55.8333 | ≤ 30 mg/L | 86% |
| February 2026 | BOD, 5-day, 20 deg. C, weekly average | 84 | ≤ 45 mg/L | 87% |
| February 2026 | Phosphorus, total [as P], monthly average | .6226 | ≤ .51 mg/L | 22% |
| March 2026 | BOD, 5-day, 20 deg. C, monthly average | 38.5385 | ≤ 30 mg/L | 28% |
| March 2026 | BOD, 5-day, 20 deg. C, weekly average | 49.6667 | ≤ 45 mg/L | 10% |
| March 2026 | Phosphorus, total [as P], monthly average | .897 | ≤ .51 mg/L | 76% |
| April 2026 | BOD, 5-day, 20 deg. C, monthly average | 31.7857 | ≤ 30 mg/L | 6% |
| April 2026 | BOD, 5-day, 20 deg. C, weekly average | 45.6667 | ≤ 45 mg/L | 1% |
| April 2026 | Phosphorus, total [as P], monthly average | .7833 | ≤ .51 mg/L | 54% |
| May 2026 | Phosphorus, total [as P], monthly average | .5648 | ≤ .51 mg/L | 11% |
| June 2026 | BOD, 5-day, 20 deg. C, monthly average | 33.2308 | ≤ 30 mg/L | 11% |
| June 2026 | BOD, 5-day, 20 deg. C, weekly average | 47.3333 | ≤ 45 mg/L | 5% |
| June 2026 | Phosphorus, total [as P], monthly average | .7171 | ≤ .51 mg/L | 41% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Sep | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Oct | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Nov | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jan | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Feb | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Mar | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Apr | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | May | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jun | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jul | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Aug | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Sep | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Oct | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Nov | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jan | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Feb | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Mar | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Apr | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | May | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jun | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jul | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Aug | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 24 lb/d | Sep | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 47 lb/d | Oct | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 115 lb/d | Nov | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 55 lb/d | Dec | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 54 lb/d | Jan | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 62 lb/d | Feb | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 91 lb/d | Mar | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 235 lb/d | Apr | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 82 lb/d | May | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 31 lb/d | Jun | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 21 lb/d | Jul | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 18 lb/d | Aug | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 49 lb/d | Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 125 lb/d | Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 141 lb/d | Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 98 lb/d | Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 52 lb/d | Jan | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 55 lb/d | Feb | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 31 lb/d | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 59 lb/d | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 174 lb/d | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 221 lb/d | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 199 lb/d | Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 120 lb/d | Jan | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 124 lb/d | Feb | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 143 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 355 lb/d | Apr | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 216 lb/d | May | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 53 lb/d | Jun | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 41 lb/d | Jul | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 37 lb/d | Aug | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .51 mg/L | all year | 001 |
| Phosphorus, total [as P] | annual average | report only (lb/yr) | all year | 001 |
| Phosphorus, total [as P] | annual maximum | report only (lb/yr) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 102 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 102 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 102 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 102 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 701 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 701 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 701 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 701 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 701 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 701 |
Cited limits by parameter: Wisconsin's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/WI0025615 · MCP: https://passage-data.com/mcp