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Sewage treatment plant, major discharger, Marshfield, Missouri. NPDES permit MO0040843 expired Sep 30, 2023; its limits still apply. Last 12 months: over a limit 9 times (last September 2026), 16 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | E. coli, daily maximum | > 2420 | ≤ 126 #/100mL | — |
| January 2026 | E. coli, daily maximum | 435 | ≤ 126 #/100mL | 245% |
| February 2026 | E. coli, daily maximum | 160 | ≤ 126 #/100mL | 27% |
| March 2026 | E. coli, daily maximum | > 2420 | ≤ 126 #/100mL | — |
| April 2026 | E. coli, daily maximum | 1046 | ≤ 126 #/100mL | 730% |
| May 2026 | Solids, suspended percent removal, monthly average minimum | 54.43 | ≥ 85 % | 204% |
| May 2026 | pH, maximum | 9.17 | ≤ 9 SU | — |
| July 2026 | Nitrogen, ammonia total [as N], monthly average | 1.47 | ≤ .9 mg/L | 63% |
| September 2026 | Copper, total recoverable, monthly average | 19.5 | ≤ 14.4 ug/L | 35% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | weekly average | ≤ 15 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 10 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 | ≤ 20 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year | 002 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 002 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 10 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.7 mg/L | Apr–Sep | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .9 mg/L | Apr–Sep | 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 |
| Cyanide, free [amenable to chlorination] | daily maximum | ≤ 10 ug/L | all year | 002 |
| Cyanide, free [amenable to chlorination] | monthly average | ≤ 10 ug/L | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 002 |
| Zinc, total recoverable | daily maximum | ≤ 254.8 ug/L | all year | 002 |
| Zinc, total recoverable | monthly average | ≤ 120.1 ug/L | all year | 002 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Lead, total recoverable | daily maximum | ≤ 16.9 ug/L | all year | 002 |
| Lead, total recoverable | monthly average | ≤ 5.4 ug/L | all year | 002 |
| Copper, total recoverable | daily maximum | ≤ 32.3 ug/L | all year | 002 |
| Copper, total recoverable | monthly average | ≤ 14.4 ug/L | all year | 002 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 002 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | all year | 002 |
| Chromium, trivalent total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Chromium, trivalent total recoverable | monthly average | report only (ug/L) | all year | 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 |
| E. coli | daily maximum | ≤ 126 #/100mL | all year | 002 |
| E. coli | 30-day geometric mean | report only (#/100mL) | all year | 002 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (toxic) | all year | 002 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (toxic) | all year | 002 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | INF |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | INF |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | INF |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | INF |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | INF |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | INF |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | INF |
| Phosphorus, total [as P] | 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
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