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Sewage treatment plant, major discharger, Farmington, Missouri. NPDES permit MO0028860 expired Sep 30, 2021; its limits still apply. Last 12 months: over a limit 12 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | Phosphorus, total [as P], annual average | 5.45 | ≤ 3 mg/L | 82% |
| February 2026 | Phosphorus, total [as P], annual average | 3.81 | ≤ 3 mg/L | 27% |
| April 2026 | E. coli, 7-day geometric mean | 1250 | ≤ 1030 #/100mL | 21% |
| May 2026 | BOD, carbonaceous, percent removal, monthly average minimum | 83 | ≥ 85 % | 13% |
| May 2026 | E. coli, 30-day geometric mean | 10288 | ≤ 206 #/100mL | 4894% |
| May 2026 | E. coli, 7-day geometric mean | 47200 | ≤ 1030 #/100mL | 4483% |
| May 2026 | Nitrogen, ammonia total [as N], monthly average | 2 | ≤ .8 mg/L | 150% |
| June 2026 | Nitrogen, ammonia total [as N], monthly average | 2 | ≤ .8 mg/L | 150% |
| July 2026 | Nitrogen, ammonia total [as N], daily maximum | 7.1 | ≤ 4.3 mg/L | 65% |
| July 2026 | Nitrogen, ammonia total [as N], monthly average | 7.1 | ≤ .8 mg/L | 788% |
| July 2026 | Solids, suspended percent removal, monthly average minimum | 83 | ≥ 85 % | 13% |
| August 2026 | Nitrogen, ammonia total [as N], monthly average | 1.2 | ≤ .8 mg/L | 50% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 001 |
| Oxygen, dissolved [DO] | monthly average minimum | report only (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 | ≤ 33 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 22 mg/L | all year | 001 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 001 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 10 mg/L | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.3 mg/L | Apr–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .8 mg/L | Apr–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | monthly 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] | monthly average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly 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] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | annual average | ≤ 3 mg/L | all year | 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 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (toxic) | all year | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (toxic) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 22 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | all year | 001 |
| BOD, carbonaceous, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 002 |
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/MO0028860 · MCP: https://passage-data.com/mcp