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Sewerage Systems, major discharger, Green Bay, Wisconsin. NPDES permit WI0065251 expired Jun 30, 2019; its limits still apply. Last 12 months: over a limit 2 times (last June 2026), 168 required values missing, 32 of 44 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| May 2026 | Chlorine, total residual, daily maximum | < 100 | ≤ 38 ug/L | 163% |
| June 2026 | Chlorine, total residual, daily maximum | < 100 | ≤ 38 ug/L | 163% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| 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 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 38 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 13 mg/L | May–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 14 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 26 mg/L | Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 15 mg/L | Jan–Apr | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.7 mg/L | May–Sep | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 001 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | 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 |
| Chlorine, total residual | daily maximum | ≤ 38 ug/L | May–Sep | 001 |
| E. coli | monthly average | report only (#/100mL) | May–Sep | 001 |
| E. coli | daily maximum | report only (#/100mL) | May–Sep | 001 |
| Mercury, total recoverable | daily maximum | ≤ 6.6 ng/L | all year | 001 |
| Coliform, fecal general | geometric mean | ≤ 400 #/100mL | May–Sep | 001 |
| BOD, carbonaceous [5 day, 5 C] | weekly average | ≤ 40 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 5 C] | monthly average | ≤ 25 mg/L | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 051 |
| pH | daily maximum | ≤ 9 SU | all year | 051 |
| Solids, total suspended | weekly average | ≤ 20 mg/L | all year | 051 |
| Solids, total suspended | monthly average | ≤ 10 mg/L | all year | 051 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 051 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 051 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 051 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | May–Oct | 051 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 31 mg/L | Nov, Dec | 051 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 27 mg/L | Jan–Mar | 051 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 24 mg/L | Apr | 051 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May–Oct | 051 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 34 mg/L | Nov, Dec | 051 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 34 mg/L | Jan–Mar | 051 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 34 mg/L | Apr | 051 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 051 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 051 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 051 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 051 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 051 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 051 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 051 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 051 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 051 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 051 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 051 |
| Chlorine, total residual | monthly average | report only (ug/L) | May–Sep | 051 |
| Chlorine, total residual | daily maximum | ≤ 38 ug/L | May–Sep | 051 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | all year | 051 |
| Coliform, fecal general | geometric mean | ≤ 400 #/100mL | May–Sep | 051 |
| BOD, carbonaceous [5 day, 5 C] | weekly average | ≤ 18 mg/L | all year | 051 |
| BOD, carbonaceous [5 day, 5 C] | monthly average | ≤ 9 mg/L | all year | 051 |
| BOD, carbonaceous [5 day, 5 C] | daily maximum | report only (mg/L) | all year | 051 |
| 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 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 701 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 701 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 701 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 701 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 701 |
| Copper, total recoverable | daily maximum | report only (ug/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 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | all year | 701 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 751 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 751 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 751 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 751 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 751 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 751 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 751 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 751 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 751 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 751 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 751 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 751 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | all year | 751 |
Cited limits by parameter: Wisconsin's rules and the federal ones.
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