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Sewage treatment plant, major discharger, Sullivan, Missouri. NPDES permit MO0104736 expired Dec 31, 2024; its limits still apply. Last 12 months: over a limit 2 times (last July 2026), 3 of 36 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| June 2026 | Cadmium, total recoverable, daily maximum | 2.47 | ≤ 2.3 ug/L | 7% |
| July 2026 | Cadmium, total recoverable, monthly average | 1.91 | ≤ .9 ug/L | 112% |
| 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 | ≤ 12.1 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Sep | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Jul, Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.1 mg/L | Feb | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Nov | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.7 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Sep | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.1 mg/L | Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | Jul, Aug | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.7 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.2 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.6 mg/L | Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.7 mg/L | Feb | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.1 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Nov | 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 | ≤ 9.5 ug/L | all year | 002 |
| Cyanide, free [amenable to chlorination] | monthly average | ≤ 3.7 ug/L | all year | 002 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Iron, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Silver total recoverable | daily maximum | ≤ 10.4 mg/L | all year | 002 |
| Silver total recoverable | monthly average | ≤ 4.2 mg/L | all year | 002 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Cadmium, total recoverable | daily maximum | ≤ 2.3 ug/L | all year | 002 |
| Cadmium, total recoverable | monthly average | ≤ .9 ug/L | all year | 002 |
| Lead, total recoverable | daily maximum | ≤ 12.3 ug/L | all year | 002 |
| Lead, total recoverable | monthly average | ≤ 4.2 ug/L | all year | 002 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Vinyl chloride | daily maximum | report only (ug/L) | all year | 002 |
| Vinyl chloride | monthly average | report only (ug/L) | all year | 002 |
| Trichloroethylene | daily maximum | report only (ug/L) | all year | 002 |
| Trichloroethylene | 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 | monthly average | report only (#/100mL) | all year | 002 |
| Toxicity [chronic], Ceriodaphnia dubia | daily maximum | report only (toxic) | all year | 002 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | daily maximum | report only (toxic) | all year | 002 |
| cis-1,2-Dichloroethylene | daily maximum | report only (ug/L) | all year | 002 |
| cis-1,2-Dichloroethylene | monthly average | report only (ug/L) | 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 |
| 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 |
| 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 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | SM2 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | SM2 |
Cited limits by parameter: Missouri's rules and the federal ones.
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