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Sewage treatment plant, Holcomb, Missouri. NPDES permit MO0022331, in force until May 31, 2027. Last 12 months: over a limit 20 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | E. coli, 30-day geometric mean | > 2420 | ≤ 206 #/100mL | — |
| October 2025 | E. coli, 7-day geometric mean | > 2420 | ≤ 1030 #/100mL | — |
| October 2025 | Solids, suspended percent removal, monthly average minimum | 53.9 | ≥ 65 % | 32% |
| March 2026 | BOD, 5-day, 20 deg. C, monthly average | 124 | ≤ 45 mg/L | 176% |
| March 2026 | BOD, 5-day, 20 deg. C, weekly average | 124 | ≤ 65 mg/L | 91% |
| March 2026 | BOD, 5-day, percent removal, monthly average minimum | 18.4 | ≥ 65 % | 133% |
| March 2026 | Solids, suspended percent removal, monthly average minimum | 33.3 | ≥ 65 % | 91% |
| April 2026 | E. coli, 30-day geometric mean | > 2420 | ≤ 206 #/100mL | — |
| April 2026 | E. coli, 7-day geometric mean | > 2420 | ≤ 1030 #/100mL | — |
| April 2026 | Solids, suspended percent removal, monthly average minimum | 44.3 | ≥ 65 % | 59% |
| May 2026 | E. coli, 30-day geometric mean | > 2420 | ≤ 206 #/100mL | — |
| May 2026 | E. coli, 7-day geometric mean | > 2420 | ≤ 1030 #/100mL | — |
| June 2026 | E. coli, 30-day geometric mean | > 2420 | ≤ 206 #/100mL | — |
| June 2026 | E. coli, 7-day geometric mean | > 2420 | ≤ 1030 #/100mL | — |
| June 2026 | Solids, suspended percent removal, monthly average minimum | 62 | ≥ 65 % | 9% |
| July 2026 | E. coli, 30-day geometric mean | 2044 | ≤ 206 #/100mL | 892% |
| August 2026 | E. coli, 30-day geometric mean | 449.3 | ≤ 206 #/100mL | 118% |
| August 2026 | Solids, suspended percent removal, monthly average minimum | 60 | ≥ 65 % | 14% |
| September 2026 | E. coli, 30-day geometric mean | 319.5 | ≤ 206 #/100mL | 55% |
| September 2026 | Solids, suspended percent removal, monthly average minimum | 55.6 | ≥ 65 % | 27% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | weekly average | ≤ 65 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 45 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| Solids, total suspended | weekly average | ≤ 110 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 70 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 | ≤ 41 mg/L | Apr, Jun, Sep, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65.3 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 28.8 mg/L | Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 41 mg/L | Jul | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 48.4 mg/L | Jan, Feb, Mar, Nov | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 34.5 mg/L | Aug | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 41 mg/L | Apr, Jun, Sep, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 65.3 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 28.8 mg/L | Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 35.9 mg/L | Jul | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 48.4 mg/L | Jan, Feb, Mar, Nov | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 32.1 mg/L | Aug | 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 |
| 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 | 7-day geometric mean | ≤ 1030 #/100mL | Apr–Oct | 002 |
| E. coli | 30-day geometric mean | ≤ 206 #/100mL | Apr–Oct | 002 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 65 % | all year | 002 |
| Solids, suspended percent removal | monthly average minimum | ≥ 65 % | 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 |
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/MO0022331 · MCP: https://passage-data.com/mcp