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Sewage treatment plant, Roberts, Wisconsin. NPDES permit WI0028835 expired Sep 30, 2022; its limits still apply. Last 12 months: over a limit 6 times (last June 2026), 55 required values missing, 12 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | Solids, total suspended, weekly average | < 39 | ≤ 30 mg/L | 30% |
| May 2026 | Nitrogen, ammonia total [as N], daily maximum | 24.6 | ≤ 12 mg/L | 105% |
| May 2026 | Nitrogen, ammonia total [as N], weekly average | 18.4667 | ≤ 12 mg/L | 54% |
| June 2026 | Nitrogen, ammonia total [as N], daily maximum | 24.7 | ≤ 12 mg/L | 106% |
| June 2026 | Nitrogen, ammonia total [as N], weekly average | 14.3667 | ≤ 12 mg/L | 20% |
| June 2026 | pH, daily maximum | 9.01 | ≤ 9 SU | — |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 30 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | all year | 003 |
| pH | daily minimum | ≥ 6 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | weekly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 12 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 12 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12 mg/L | all year | 003 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 003 |
| Copper, total recoverable | weekly average | ≤ 63 ug/L | all year | 003 |
| Copper, total recoverable | monthly average | ≤ 63 ug/L | all year | 003 |
| Copper, total recoverable | daily maximum | ≤ 63 ug/L | all year | 003 |
| Copper, total recoverable | daily maximum | ≤ .41 lb/d | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 702 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 702 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 702 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 702 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 702 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 702 |
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/WI0028835 · MCP: https://passage-data.com/mcp