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Sewage treatment plant, major discharger, Grain Valley, Missouri. NPDES permit MO0028886, in force until Nov 30, 2028. Last 12 months: over a limit 7 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Nitrogen, ammonia total [as N], daily maximum | 5.7 | ≤ 4.7 mg/L | 21% |
| November 2025 | Nitrogen, ammonia total [as N], monthly average | 3.74 | ≤ 1.8 mg/L | 108% |
| December 2025 | Nitrogen, ammonia total [as N], daily maximum | 6.3 | ≤ 4.7 mg/L | 34% |
| December 2025 | Nitrogen, ammonia total [as N], monthly average | 4.7 | ≤ 1.8 mg/L | 161% |
| January 2026 | Nitrogen, ammonia total [as N], daily maximum | 6.6 | ≤ 4.7 mg/L | 40% |
| January 2026 | Nitrogen, ammonia total [as N], monthly average | 2 | ≤ 1.8 mg/L | 11% |
| May 2026 | E. coli, 30-day geometric mean | 224 | ≤ 206 #/100mL | 9% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 mg/L | all year | 001 |
| Oxygen, dissolved [DO] | monthly average minimum | ≥ 6 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 21 mg/L | Apr–Sep | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 27 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 14 mg/L | Apr–Sep | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 18 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | weekly average | ≤ 27 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 18 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, total [as N] | annual average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | annual total | report only (lb/yr) | all year | 001 |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.2 mg/L | Apr–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.7 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 | ≤ 1.8 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 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] | annual average | 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 total | report only (lb/yr) | all year | 001 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | 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 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | monthly average | report only (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 |
| Flow, in conduit or thru treatment plant | monthly total | 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 |
| 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 |
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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