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Sewage treatment plant, major discharger, Joplin, Missouri. NPDES permit MO0023256 expired Mar 31, 2023; its limits still apply. Last 12 months: over a limit 8 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| May 2026 | E. coli, 30-day geometric mean | 356 | ≤ 126 #/100mL | 183% |
| May 2026 | E. coli, 7-day geometric mean | > 2419.6 | ≤ 630 #/100mL | — |
| June 2026 | E. coli, 30-day geometric mean | 2188 | ≤ 126 #/100mL | 1637% |
| June 2026 | E. coli, 7-day geometric mean | 14136 | ≤ 630 #/100mL | 2144% |
| July 2026 | E. coli, 30-day geometric mean | 8887 | ≤ 126 #/100mL | 6953% |
| July 2026 | E. coli, 7-day geometric mean | 24196 | ≤ 630 #/100mL | 3741% |
| August 2026 | E. coli, 30-day geometric mean | 7943 | ≤ 126 #/100mL | 6204% |
| August 2026 | E. coli, 7-day geometric mean | 16749 | ≤ 630 #/100mL | 2559% |
| 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 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 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 001 |
| Oil and grease [soxhlet extr.] tot. | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.7 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.7 mg/L | Apr–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.8 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.7 mg/L | Apr–Sep | 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 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 001 |
| Cyanide, free [amenable to chlorination] | monthly average | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 214.5 ug/L | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ 124.6 ug/L | all year | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Lead, total recoverable | daily maximum | ≤ 25.6 ug/L | all year | 001 |
| Lead, total recoverable | monthly average | ≤ 8.2 ug/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 | ≤ 630 #/100mL | Apr–Oct | 001 |
| E. coli | 30-day geometric mean | ≤ 126 #/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, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| 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 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | SM1 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | SM1 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | SM1 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | SM1 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | SM1 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | SM1 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | SM1 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | SM1 |
| 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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On EPA ECHO: Facility report · DMR history
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