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Sewage treatment plant, Cortland, Nebraska. NPDES permit NE0027782, in force until Mar 31, 2030. Last 12 months: over a limit 2 times (last November 2025), 4 of 26 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Solids, total suspended, daily maximum | 180 mg/L | ≤ 120 mg/L | 50% |
| November 2025 | Solids, total suspended, monthly average | 180 mg/L | ≤ 80 mg/L | 125% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (kg/d) | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | report only (kg/d) | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 80 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 120 mg/L | all year | 001 |
| Solids, total suspended | monthly average | report only (kg/d) | all year | 001 |
| Solids, total suspended | daily maximum | report only (kg/d) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.03 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .97 mg/L | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .38 mg/L | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.06 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.96 mg/L | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .76 mg/L | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.26 kg/d | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .81 kg/d | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .33 kg/d | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.53 kg/d | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.62 kg/d | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .65 kg/d | Jun–Oct | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| E. coli, MTEC-MF | monthly average | ≤ 126 #/100mL | May–Sep | 001 |
| E. coli, MTEC-MF | daily maximum | ≤ 298 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| E. coli, MTEC-MF | daily maximum | ≤ 298 #/100mL | May–Sep | 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 |
| Duration of discharge | value | report only (d) | all year | 001 |
| Flow, total | value | report only (Mgal/mo) | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (kg/d) | all year | 002 |
| BOD, 5-day, 20 deg. C | weekly average | report only (kg/d) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | report only (SU) | all year | 002 |
| Solids, total suspended | monthly average | ≤ 80 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 120 mg/L | all year | 002 |
| Solids, total suspended | monthly average | report only (kg/d) | all year | 002 |
| Solids, total suspended | daily maximum | report only (kg/d) | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.04 mg/L | Jan, Feb, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .74 mg/L | Mar–May | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .24 mg/L | Jun–Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.09 mg/L | Jan, Feb, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.48 mg/L | Mar–May | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .48 mg/L | Jun–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.14 kg/d | Jan, Feb, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .57 kg/d | Mar–May | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .24 kg/d | Jun–Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.29 kg/d | Jan, Feb, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.13 kg/d | Mar–May | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .49 kg/d | Jun–Oct | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 002 |
| E. coli, MTEC-MF | monthly average | ≤ 126 #/100mL | May–Sep | 002 |
| E. coli, MTEC-MF | daily maximum | ≤ 298 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 002 |
| E. coli, MTEC-MF | daily maximum | ≤ 298 #/100mL | May–Sep | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Duration of discharge | value | report only (d) | all year | 002 |
| Flow, total | value | report only (Mgal/mo) | all year | 002 |
| BOD, 5-day, 20 deg. C | value | report only (mg/L) | all year | INF1 |
| pH | value | report only (SU) | all year | INF1 |
| Solids, total suspended | value | report only (mg/L) | all year | INF1 |
| Flow, in conduit or thru treatment plant | value | report only (MGD) | all year | INF1 |
| BOD, 5-day, 20 deg. C | value | report only (mg/L) | all year | INF2 |
| pH | value | report only (SU) | all year | INF2 |
| Solids, total suspended | value | report only (mg/L) | all year | INF2 |
| Flow, in conduit or thru treatment plant | value | report only (MGD) | all year | INF2 |
Cited limits by parameter: Nebraska's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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