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Sewerage Systems, Warsaw, Missouri. NPDES permit MO0140635, in force until Mar 31, 2030. Last 12 months: over a limit 11 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| June 2026 | 001 | Nitrogen, ammonia total [as N], daily maximum | 15.1 | ≤ 12.1 mg/L | 25% |
| June 2026 | 001 | Nitrogen, ammonia total [as N], monthly average | 15 | ≤ 2 mg/L | 650% |
| June 2026 | 002 | Nitrogen, ammonia total [as N], daily maximum | 8.3 | ≤ 3.6 mg/L | 131% |
| June 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 8.3 | ≤ 1.4 mg/L | 493% |
| September 2026 | 001 | Nitrogen, ammonia total [as N], daily maximum | 12.7 | ≤ 12.1 mg/L | 5% |
| September 2026 | 001 | Nitrogen, ammonia total [as N], monthly average | 12.7 | ≤ 1.5 mg/L | 747% |
| September 2026 | 002 | BOD, 5-day, 20 deg. C, monthly average | 20.7 | ≤ 20 mg/L | 4% |
| September 2026 | 002 | Nitrogen, ammonia total [as N], daily maximum | 16.7 | ≤ 3.6 mg/L | 364% |
| September 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 16.7 | ≤ 1.4 mg/L | 1093% |
| September 2026 | 002 | Solids, total suspended, monthly average | 42.7 | ≤ 20 mg/L | 114% |
| September 2026 | 002 | Solids, total suspended, weekly average | 42.7 | ≤ 30 mg/L | 42% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | 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 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Jan–Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Jul–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Oct–Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Apr–Jun | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.1 mg/L | Jan–Mar | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | Jul–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.9 mg/L | Oct–Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Apr–Jun | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| E. coli | daily maximum | ≤ 630 #/100mL | Apr–Dec | 001 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | Apr–Dec | 001 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Apr–Dec | 002 |
| Oxygen, dissolved [DO] | monthly average minimum | report only (mg/L) | Apr–Dec | 002 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 30 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | weekly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.5 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.6 mg/L | Apr–Sep | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.9 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.4 mg/L | Apr–Sep | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ 17 ug/L | Apr–Dec | 002 |
| Chlorine, total residual | monthly average | ≤ 7 ug/L | Apr–Dec | 002 |
| E. coli | daily maximum | ≤ 630 #/100mL | Apr–Dec | 002 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | Apr–Dec | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, settleable | daily maximum | ≤ 1.5 mL/L | all year | 003 |
| Solids, settleable | monthly average | ≤ 1 mL/L | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ 19 ug/L | Apr–Dec | 003 |
| Chlorine, total residual | monthly average | ≤ 11 ug/L | Apr–Dec | 003 |
Cited limits by parameter: Missouri's rules and the federal ones.
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