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Sewage treatment plant, major discharger, Waterloo, Iowa. NPDES permit IA0042650 expired May 31, 2026; its limits still apply. Last 12 months: over a limit 3 times (last July 2026), 4 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| March 2026 | SUM | BOD, carbonaceous [5 day, 20 C], 30-day average | 22028.31 | ≤ 7256 lb/d | 204% |
| March 2026 | SUM | BOD, carbonaceous [5 day, 20 C], 7-day average | 30831.03 | ≤ 11609 lb/d | 166% |
| July 2026 | 011 | pH, daily maximum | 74 | ≤ 9 SU | — |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 001 |
| pH | 30-day average | report only (SU) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | 30-day average | report only (lb/d) | all year | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | 30-day average | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (lb/d) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 008 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 008 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | 008 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 008 |
| pH | 30-day average | report only (SU) | all year | 008 |
| pH | daily maximum | report only (SU) | all year | 008 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 008 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year | 008 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 008 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 008 |
| Solids, total suspended | 30-day average | report only (lb/d) | all year | 008 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 008 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | all year | 008 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 008 |
| Nitrogen, total [as N] | 30-day average | report only (lb/d) | all year | 008 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 008 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year | 008 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 008 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (lb/d) | all year | 008 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | all year | 008 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 008 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 008 |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year | 008 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 008 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year | 008 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 008 |
| pH | daily minimum | ≥ 6 SU | all year | 011 |
| pH | daily maximum | ≤ 9 SU | all year | 011 |
| Solids, total suspended | 30-day average | ≤ 8707 lb/d | all year | 011 |
| Solids, total suspended | 7-day average | ≤ 13060 lb/d | all year | 011 |
| Nitrogen, total [as N] | 30-day average | ≤ 9285.5 lb/d | all year | 011 |
| Nitrogen, total [as N] | daily maximum | ≤ 15199 lb/d | all year | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 68 mg/L | Mar | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 55.2 mg/L | Sep | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 78.4 mg/L | Feb | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 62 mg/L | Aug | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 52.5 mg/L | Nov | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 54 mg/L | Oct | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 69.4 mg/L | Jan | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 54.3 mg/L | Dec | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 59.5 mg/L | Jun | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 64.1 mg/L | Jul | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 60.5 mg/L | May | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 53.9 mg/L | Apr | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 68 mg/L | Mar | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 55.2 mg/L | Sep | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 78.4 mg/L | Feb | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 62 mg/L | Aug | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 52.5 mg/L | Nov | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 54 mg/L | Oct | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 69.4 mg/L | Jan | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 54.3 mg/L | Dec | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 59.5 mg/L | Jun | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 64.1 mg/L | Jul | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 60.5 mg/L | May | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 53.9 mg/L | Apr | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12392 lb/d | Mar | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10890 lb/d | Sep | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13832 lb/d | Feb | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10982 lb/d | Aug | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10145 lb/d | Nov | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10558 lb/d | Oct | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12696 lb/d | Jan | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10655 lb/d | Dec | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10079 lb/d | Jun | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11575 lb/d | Jul | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11394 lb/d | May | 011 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10546 lb/d | Apr | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12392 lb/d | Mar | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10890 lb/d | Sep | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13832 lb/d | Feb | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11823 lb/d | Aug | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10145 lb/d | Nov | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10558 lb/d | Oct | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12696 lb/d | Jan | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10655 lb/d | Dec | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11114 lb/d | Jun | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12395 lb/d | Jul | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11394 lb/d | May | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10546 lb/d | Apr | 011 |
| E. coli | geometric mean | ≤ 126 #/100mL | Mar–Nov | 011 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | ≤ 1 N=0;Y=1 | all year | 011 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | ≤ 1 N=0;Y=1 | all year | 011 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 7256 lb/d | all year | 011 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 11609 lb/d | all year | 011 |
| Streamflow | 30-day average | report only (cfs) | all year | SUM |
| Streamflow | daily maximum | report only (cfs) | all year | SUM |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | SUM |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | SUM |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | SUM |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | SUM |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | SUM |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | SUM |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | SUM |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | SUM |
| pH | daily minimum | ≥ 6 SU | all year | SUM |
| pH | daily maximum | ≤ 9 SU | all year | SUM |
| Solids, total suspended | 30-day average | ≤ 8707 lb/d | all year | SUM |
| Solids, total suspended | 7-day average | ≤ 13060 lb/d | all year | SUM |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | SUM |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | SUM |
| Solids, total suspended | 30-day average | report only (lb/d) | all year | SUM |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | SUM |
| Nitrogen, total [as N] | 30-day average | ≤ 9285.5 lb/d | all year | SUM |
| Nitrogen, total [as N] | daily maximum | ≤ 15199 lb/d | all year | SUM |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | all year | SUM |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | SUM |
| Nitrogen, total [as N] | 30-day average | report only (lb/d) | all year | SUM |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18 mg/L | May | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13 mg/L | Aug | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 14.2 mg/L | Jul | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 70 mg/L | Feb | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 21.5 mg/L | Apr | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 30.7 mg/L | Mar | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 45.8 mg/L | Dec | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 30.8 mg/L | Oct | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 38.7 mg/L | Nov | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11.6 mg/L | Jun | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 55.9 mg/L | Jan | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.4 mg/L | Sep | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 79.1 mg/L | May | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 74.1 mg/L | Aug | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 87.4 mg/L | Jul | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 116.5 mg/L | Feb | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 79.8 mg/L | Apr | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 108.5 mg/L | Mar | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 72.7 mg/L | Dec | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 93.5 mg/L | Oct | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 78.4 mg/L | Nov | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 78.1 mg/L | Jun | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 95 mg/L | Jan | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 94.6 mg/L | Sep | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2962.7 lb/d | May | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2082.2 lb/d | Aug | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2283.2 lb/d | Jul | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11372 lb/d | Feb | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3519 lb/d | Apr | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4998.7 lb/d | Mar | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8998 lb/d | Dec | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5020.2 lb/d | Oct | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6282.3 lb/d | Nov | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1931.6 lb/d | Jun | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9364 lb/d | Jan | SUM |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2221.8 lb/d | Sep | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14162.8 lb/d | May | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13652.6 lb/d | Aug | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 25229 lb/d | Jul | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19558 lb/d | Feb | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14363 lb/d | Apr | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21421 lb/d | Mar | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13467 lb/d | Dec | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16990 lb/d | Oct | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13970.8 lb/d | Nov | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13877.8 lb/d | Jun | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16561 lb/d | Jan | SUM |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16916 lb/d | Sep | SUM |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year | SUM |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | SUM |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (lb/d) | all year | SUM |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | all year | SUM |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | SUM |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | SUM |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year | SUM |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | SUM |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | SUM |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | SUM |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year | SUM |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | SUM |
| E. coli | geometric mean | ≤ 126 #/100mL | Mar–Nov | SUM |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | ≤ 1 N=0;Y=1 | all year | SUM |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | ≤ 1 N=0;Y=1 | all year | SUM |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 7256 lb/d | all year | SUM |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 11609 lb/d | all year | SUM |
Cited limits by parameter: Iowa's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/IA0042650 · MCP: https://passage-data.com/mcp