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Sewage treatment plant, Gordonville, Missouri. NPDES permit MO0135615, in force until Aug 31, 2028. Last 12 months: over a limit 6 times (last April 2026), 6 of 33 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Solids, suspended percent removal, monthly average minimum | 80.95 | ≥ 85 % | 27% |
| November 2025 | BOD, 5-day, percent removal, monthly average minimum | 33.43 | ≥ 85 % | 344% |
| February 2026 | Nitrogen, ammonia total [as N], monthly average | 10.9 | ≤ 9.6 mg/L | 14% |
| April 2026 | BOD, 5-day, 20 deg. C, monthly average | 43.05 | ≤ 30 mg/L | 44% |
| April 2026 | BOD, 5-day, 20 deg. C, weekly average | 61.7 | ≤ 45 mg/L | 37% |
| April 2026 | Nitrogen, ammonia total [as N], daily maximum | 10.4 | ≤ 9.4 mg/L | 11% |
| 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 | ≤ 13.6 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.4 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.6 mg/L | Jan, Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.4 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.4 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.4 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.4 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.4 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.4 mg/L | Mar, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.4 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 6.4 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.1 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 9.6 mg/L | Jan, Feb | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.8 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 7.3 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.9 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.6 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 6.6 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 8.4 mg/L | Mar, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.5 mg/L | Oct | 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 | 7-day geometric mean | ≤ 1030 #/100mL | Apr–Oct | 001 |
| E. coli | 30-day geometric mean | ≤ 206 #/100mL | Apr–Oct | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Application rate area sprayed | total | report only (acr) | all year | 002 |
| Application rate area sprayed | monthly total | report only (acr) | all year | 002 |
| Application rate, gallons spray irrigation | total | report only (gal) | all year | 002 |
| Application rate, gallons spray irrigation | monthly total | report only (gal) | all year | 002 |
| Spray irrigation | total | report only (hr/d) | all year | 002 |
| Spray irrigation | monthly total | report only (hr/d) | all year | 002 |
| Spray irrigation, application rate | total | report only (in/d) | all year | 002 |
| Spray irrigation, application rate | monthly total | report only (in/d) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | INF |
| Solids, total suspended | monthly average | report only (mg/L) | all year | INF |
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/MO0135615 · MCP: https://passage-data.com/mcp