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Sewage treatment plant, Waterloo, Nebraska. NPDES permit NE0043311 expired Sep 30, 2026; its limits still apply. Last 12 months: over a limit 24 times (last June 2026), 4 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | BOD, carbonaceous [5 day, 20 C], monthly average | 25.6 mg/L | ≤ 25 mg/L | 2% |
| October 2025 | Solids, total suspended, 7-day average | 147.46 kg/d | ≤ 42.58 kg/d | 246% |
| October 2025 | Solids, total suspended, 7-day average | 166 mg/L | ≤ 45 mg/L | 269% |
| October 2025 | Solids, total suspended, monthly average | 147.46 kg/d | ≤ 28.39 kg/d | 419% |
| October 2025 | Solids, total suspended, monthly average | 166 mg/L | ≤ 30 mg/L | 453% |
| December 2025 | BOD, carbonaceous [5 day, 20 C], 7-day average | > 10.25 kg/d | ≤ 37.85 kg/d | — |
| December 2025 | BOD, carbonaceous [5 day, 20 C], 7-day average | > 22.59 mg/L | ≤ 40 mg/L | — |
| December 2025 | BOD, carbonaceous [5 day, 20 C], monthly average | > 10.25 kg/d | ≤ 23.66 kg/d | — |
| December 2025 | BOD, carbonaceous [5 day, 20 C], monthly average | > 22.59 mg/L | ≤ 25 mg/L | — |
| December 2025 | Solids, total suspended, monthly average | 32 mg/L | ≤ 30 mg/L | 7% |
| January 2026 | BOD, carbonaceous [5 day, 20 C], 7-day average | 68.3 mg/L | ≤ 40 mg/L | 71% |
| January 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 68.3 mg/L | ≤ 25 mg/L | 173% |
| January 2026 | Solids, total suspended, 7-day average | 62 mg/L | ≤ 45 mg/L | 38% |
| January 2026 | Solids, total suspended, monthly average | 62 mg/L | ≤ 30 mg/L | 107% |
| January 2026 | pH, daily minimum | 6.42 SU | ≥ 6.5 SU | — |
| February 2026 | Nitrogen, ammonia total [as N], monthly average | 16.99 kg/d | ≤ 16.68 kg/d | 2% |
| February 2026 | Nitrogen, ammonia total [as N], monthly average | 35.4 mg/L | ≤ 33.39 mg/L | 6% |
| March 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | < 31 mg/L | ≤ 25 mg/L | 24% |
| March 2026 | Solids, total suspended, 7-day average | 46.45 kg/d | ≤ 42.58 kg/d | 9% |
| March 2026 | Solids, total suspended, 7-day average | 64 mg/L | ≤ 45 mg/L | 42% |
| March 2026 | Solids, total suspended, monthly average | 46.45 kg/d | ≤ 28.39 kg/d | 64% |
| March 2026 | Solids, total suspended, monthly average | 64 mg/L | ≤ 30 mg/L | 113% |
| June 2026 | E. coli, MTEC-MF, geometric mean | > 2419.6 #/100mL | ≤ 126 #/100mL | — |
| June 2026 | E. coli, MTEC-MF, maximum | > 2419.6 #/100mL | ≤ 298 #/100mL | — |
| 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 | ≤ 28.39 kg/d | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 42.58 kg/d | all year | 001 |
| Nitrogen, total [as N] | minimum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 13.64 mg/L | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 33.39 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 41.74 mg/L | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 107.83 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (kg/d) | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 9.34 kg/d | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 16.68 kg/d | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (kg/d) | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 28.59 kg/d | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 53.87 kg/d | Jan, Feb, Nov, Dec | 001 |
| Phosphorus, total [as P] | minimum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | maximum | report only (mg/L) | all year | 001 |
| E. coli, MTEC-MF | geometric mean | ≤ 126 #/100mL | May–Sep | 001 |
| E. coli, MTEC-MF | 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 |
| 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 | ≤ 23.66 kg/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 37.85 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 |
| Selenium, sludge solid | value | report only (mg/kg) | all year | SLG |
| Arsenic, sludge tot. dry wt [as As] | value | report only (mg/kg) | all year | SLG |
| Nitrogen [as NO3] sludge solid | 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 (mg/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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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/NE0043311 · MCP: https://passage-data.com/mcp