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Sewage treatment plant, Puxico, Missouri. NPDES permit MO0055158 expired Sep 30, 2023; its limits still apply. Last 12 months: over a limit 16 times (last August 2026), 1 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | E. coli, 30-day geometric mean | 2194.49 | ≤ 206 #/100mL | 965% |
| October 2025 | E. coli, 7-day geometric mean | 2420 | ≤ 1030 #/100mL | 135% |
| November 2025 | BOD, 5-day, percent removal, monthly average minimum | 50 | ≥ 85 % | 233% |
| February 2026 | BOD, 5-day, 20 deg. C, monthly average | 25.7 | ≤ 20 mg/L | 29% |
| February 2026 | BOD, 5-day, 20 deg. C, weekly average | 25.7 | ≤ 25 mg/L | 3% |
| February 2026 | BOD, 5-day, percent removal, monthly average minimum | 80 | ≥ 85 % | 33% |
| February 2026 | Nitrogen, ammonia total [as N], monthly average | 3.3 | ≤ 2.1 mg/L | 57% |
| March 2026 | Nitrogen, ammonia total [as N], monthly average | 2.23 | ≤ 2.1 mg/L | 6% |
| April 2026 | BOD, 5-day, 20 deg. C, monthly average | 33.2 | ≤ 20 mg/L | 66% |
| April 2026 | BOD, 5-day, 20 deg. C, weekly average | 33.2 | ≤ 25 mg/L | 33% |
| April 2026 | BOD, 5-day, percent removal, monthly average minimum | 82 | ≥ 85 % | 20% |
| April 2026 | E. coli, 30-day geometric mean | 1125.965 | ≤ 206 #/100mL | 447% |
| April 2026 | E. coli, 7-day geometric mean | 2420 | ≤ 1030 #/100mL | 135% |
| April 2026 | Nitrogen, ammonia total [as N], monthly average | 3.44 | ≤ 1 mg/L | 244% |
| May 2026 | E. coli, 7-day geometric mean | 1120 | ≤ 1030 #/100mL | 9% |
| August 2026 | E. coli, 30-day geometric mean | 254.5721 | ≤ 206 #/100mL | 24% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| BOD, 5-day, 20 deg. C | weekly average | ≤ 25 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | weekly average | ≤ 25 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 10 mg/L | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.7 mg/L | Jan, Feb, Mar, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4 mg/L | Apr–Sep |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.1 mg/L | Jan, Feb, Mar, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Apr–Sep |
| 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 |
| 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/MO0055158 · MCP: https://passage-data.com/mcp