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Sewage treatment plant, major discharger, Warrenton, Missouri. NPDES permit MO0087912, in force until May 31, 2030. Last 12 months: over a limit 12 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | BOD, 5-day, percent removal, monthly average minimum | 74 | ≥ 85 % | 73% |
| February 2026 | BOD, 5-day, percent removal, monthly average minimum | 81 | ≥ 85 % | 27% |
| February 2026 | pH, minimum | 6.2 | ≥ 6.5 SU | — |
| March 2026 | Nitrogen, ammonia total [as N], daily maximum | 9.8 | ≤ 3.9 mg/L | 151% |
| March 2026 | Nitrogen, ammonia total [as N], monthly average | 6.9 | ≤ 1.5 mg/L | 360% |
| March 2026 | pH, minimum | 5.8 | ≥ 6.5 SU | — |
| April 2026 | Nitrogen, ammonia total [as N], daily maximum | 3.6 | ≤ 2.7 mg/L | 33% |
| April 2026 | Nitrogen, ammonia total [as N], monthly average | 1.5 | ≤ 1 mg/L | 50% |
| April 2026 | pH, minimum | 6.4 | ≥ 6.5 SU | — |
| May 2026 | BOD, 5-day, percent removal, monthly average minimum | 83 | ≥ 85 % | 13% |
| May 2026 | E. coli, 7-day geometric mean | 1840 | ≤ 1030 #/100mL | 79% |
| June 2026 | pH, minimum | 6.4 | ≥ 6.5 SU | — |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.7 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.9 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.2 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.9 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.6 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.7 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.1 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.1 mg/L | Feb, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.2 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.5 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.9 mg/L | Mar |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .6 mg/L | Jun |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .7 mg/L | Sep |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .5 mg/L | Jul |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 mg/L | Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.1 mg/L | Jan |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Apr |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.6 mg/L | Nov |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.9 mg/L | Feb, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .8 mg/L | May |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .6 mg/L | Aug |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | Mar |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| E. coli | 7-day geometric mean | ≤ 1030 #/100mL | Apr–Oct |
| E. coli | 30-day geometric mean | ≤ 206 #/100mL | Apr–Oct |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (toxic) | all year |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (toxic) | all year |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
Cited limits by parameter: Missouri'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/MO0087912 · MCP: https://passage-data.com/mcp