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Sewage treatment plant, Plattsmouth, Nebraska. NPDES permit NE0139572, in force until Dec 31, 2029. Last 12 months: over a limit 7 times (last March 2026), 4 required values missing, 6 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Chlorine, total residual, daily maximum | 36.5 mg/L | ≤ 3.82 mg/L | 855% |
| October 2025 | Chlorine, total residual, monthly average | 36.5 mg/L | ≤ 1.21 mg/L | 2917% |
| November 2025 | Chlorine, total residual, daily maximum | 36.5 mg/L | ≤ 17.5 mg/L | 109% |
| November 2025 | Chlorine, total residual, monthly average | 36.5 mg/L | ≤ 7.81 mg/L | 367% |
| December 2025 | Chlorine, total residual, daily maximum | 36.5 mg/L | ≤ 17.5 mg/L | 109% |
| December 2025 | Chlorine, total residual, monthly average | 36.5 mg/L | ≤ 7.81 mg/L | 367% |
| March 2026 | Solids, total suspended, monthly average | 37 mg/L | ≤ 30 mg/L | 23% |
| 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 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1.022 kg/d | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 1.533 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 | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 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 | May–Sep | 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 |
| Chlorine, total residual | monthly average | ≤ 17.57 mg/L | Mar–May | 001 |
| Chlorine, total residual | monthly average | ≤ 1.21 mg/L | Jun–Oct | 001 |
| Chlorine, total residual | monthly average | ≤ 7.81 mg/L | Jan, Feb, Nov, Dec | 001 |
| Chlorine, total residual | daily maximum | ≤ 52.71 mg/L | Mar–May | 001 |
| Chlorine, total residual | daily maximum | ≤ 3.82 mg/L | Jun–Oct | 001 |
| Chlorine, total residual | daily maximum | ≤ 17.5 mg/L | Jan, Feb, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ .852 kg/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 1.363 kg/d | all year | 001 |
| pH | value | report only (SU) | all year | INF |
| Solids, total suspended | value | report only (mg/L) | all year | INF |
| Flow, in conduit or thru treatment plant | value | report only (MGD) | all year | INF |
| BOD, carbonaceous [5 day, 20 C] | value | report only (mg/L) | all year | INF |
| pH | value | report only (SU) | all year | SLG |
| Nitrate nitrogen, dry weight | value | report only (mg/kg) | all year | SLG |
| Selenium, sludge, total, dry weight [as Se] | value | report only (mg/kg) | all year | SLG |
| Arsenic total, dry weight, sludge | value | report only (mg/kg) | all year | SLG |
| Molybdenum, sludge, total, dry weight [as Mo] | value | report only (mg/kg) | all year | SLG |
| Zinc, sludge, total, dry weight [as Zn] | value | report only (mg/kg) | all year | SLG |
| Lead, sludge, total, dry weight [as Pb] | value | report only (mg/kg) | all year | SLG |
| Nickel, sludge, total, dry weight [as Ni] | value | report only (mg/kg) | all year | SLG |
| Nitrogen, sludge, total, dry weight [as N] | value | report only (mg/kg) | all year | SLG |
| Mercury, sludge, total, dry weight [as Hg] | value | report only (mg/kg) | all year | SLG |
| Chromium, sludge, total, dry weight [as Cr] | value | report only (mg/kg) | all year | SLG |
| Copper, sludge, total, dry weight [as Cu] | value | report only (mg/kg) | all year | SLG |
| Cadmium, sludge, total, dry weight [as Cd] | value | report only (mg/kg) | all year | SLG |
| Solids, sludge, total, dry weight | value | report only (kg) | all year | SLG |
| Nitrogen, ammonia, sludge, tot dry wgt | value | report only (mg/kg) | all year | SLG |
Cited limits by parameter: Nebraska's rules and the federal ones.
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