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Sewage treatment plant, Morley, Missouri. NPDES permit MO0126195, in force until Apr 30, 2028. Last 12 months: over a limit 66 times (last July 2026), 79 required values missing, 17 of 23 reports late. 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, 30-day geometric mean | > 2420 | ≤ 206 #/100mL | — |
| October 2025 | E. coli, 7-day geometric mean | > 2420 | ≤ 1030 #/100mL | — |
| October 2025 | E. coli, 7-day geometric mean | > 2420 | ≤ 1030 #/100mL | — |
| October 2025 | Nitrogen, ammonia total [as N], daily maximum | 37 | ≤ 10.1 mg/L | 266% |
| October 2025 | Nitrogen, ammonia total [as N], daily maximum | 37 | ≤ 10.1 mg/L | 266% |
| October 2025 | Nitrogen, ammonia total [as N], monthly average | 37 | ≤ 2 mg/L | 1750% |
| October 2025 | Nitrogen, ammonia total [as N], monthly average | 37 | ≤ 2 mg/L | 1750% |
| November 2025 | Nitrogen, ammonia total [as N], daily maximum | 41 | ≤ 17 mg/L | 141% |
| November 2025 | Nitrogen, ammonia total [as N], daily maximum | 41 | ≤ 17 mg/L | 141% |
| November 2025 | Nitrogen, ammonia total [as N], monthly average | 41 | ≤ 3.9 mg/L | 951% |
| November 2025 | Nitrogen, ammonia total [as N], monthly average | 41 | ≤ 3.9 mg/L | 951% |
| December 2025 | Nitrogen, ammonia total [as N], daily maximum | 42 | ≤ 14.4 mg/L | 192% |
| December 2025 | Nitrogen, ammonia total [as N], monthly average | 42 | ≤ 3.5 mg/L | 1100% |
| January 2026 | Nitrogen, ammonia total [as N], daily maximum | 51.7 | ≤ 17 mg/L | 204% |
| January 2026 | Nitrogen, ammonia total [as N], daily maximum | 51.7 | ≤ 17 mg/L | 204% |
| January 2026 | Nitrogen, ammonia total [as N], monthly average | 51.7 | ≤ 3.9 mg/L | 1226% |
| January 2026 | Nitrogen, ammonia total [as N], monthly average | 51.7 | ≤ 3.9 mg/L | 1226% |
| February 2026 | BOD, 5-day, 20 deg. C, monthly average | 134 | ≤ 45 mg/L | 198% |
| February 2026 | BOD, 5-day, 20 deg. C, weekly average | 134 | ≤ 65 mg/L | 106% |
| February 2026 | BOD, 5-day, percent removal, monthly average minimum | 53.8 | ≥ 65 % | 32% |
| February 2026 | Nitrogen, ammonia total [as N], daily maximum | 54 | ≤ 17 mg/L | 218% |
| February 2026 | Nitrogen, ammonia total [as N], monthly average | 54 | ≤ 3.9 mg/L | 1285% |
| March 2026 | BOD, 5-day, 20 deg. C, monthly average | 86.4 | ≤ 45 mg/L | 92% |
| March 2026 | BOD, 5-day, 20 deg. C, monthly average | 86.4 | ≤ 45 mg/L | 92% |
| March 2026 | BOD, 5-day, 20 deg. C, weekly average | 86.4 | ≤ 65 mg/L | 33% |
| March 2026 | BOD, 5-day, 20 deg. C, weekly average | 86.4 | ≤ 65 mg/L | 33% |
| March 2026 | Nitrogen, ammonia total [as N], daily maximum | 53 | ≤ 17 mg/L | 212% |
| March 2026 | Nitrogen, ammonia total [as N], daily maximum | 53 | ≤ 17 mg/L | 212% |
| March 2026 | Nitrogen, ammonia total [as N], monthly average | 53 | ≤ 3.9 mg/L | 1259% |
| March 2026 | Nitrogen, ammonia total [as N], monthly average | 53 | ≤ 3.9 mg/L | 1259% |
| April 2026 | BOD, 5-day, 20 deg. C, monthly average | 122 | ≤ 45 mg/L | 171% |
| April 2026 | BOD, 5-day, 20 deg. C, monthly average | 122 | ≤ 45 mg/L | 171% |
| April 2026 | BOD, 5-day, 20 deg. C, weekly average | 122 | ≤ 65 mg/L | 88% |
| April 2026 | BOD, 5-day, 20 deg. C, weekly average | 122 | ≤ 65 mg/L | 88% |
| April 2026 | BOD, 5-day, percent removal, monthly average minimum | 21 | ≥ 65 % | 126% |
| April 2026 | BOD, 5-day, percent removal, monthly average minimum | 21 | ≥ 65 % | 126% |
| April 2026 | E. coli, 30-day geometric mean | > 2420 | ≤ 206 #/100mL | — |
| April 2026 | E. coli, 30-day geometric mean | > 2420 | ≤ 206 #/100mL | — |
| April 2026 | E. coli, 7-day geometric mean | > 2420 | ≤ 1030 #/100mL | — |
| April 2026 | E. coli, 7-day geometric mean | > 2420 | ≤ 1030 #/100mL | — |
| April 2026 | Nitrogen, ammonia total [as N], daily maximum | 41.7 | ≤ 14.4 mg/L | 190% |
| April 2026 | Nitrogen, ammonia total [as N], daily maximum | 41.7 | ≤ 14.4 mg/L | 190% |
| April 2026 | Nitrogen, ammonia total [as N], monthly average | 41.7 | ≤ 2.8 mg/L | 1389% |
| April 2026 | Nitrogen, ammonia total [as N], monthly average | 41.7 | ≤ 2.8 mg/L | 1389% |
| April 2026 | Solids, suspended percent removal, monthly average minimum | 45 | ≥ 65 % | 57% |
| April 2026 | Solids, suspended percent removal, monthly average minimum | 45 | ≥ 65 % | 57% |
| May 2026 | BOD, 5-day, 20 deg. C, monthly average | 135 | ≤ 45 mg/L | 200% |
| May 2026 | BOD, 5-day, 20 deg. C, weekly average | 135 | ≤ 65 mg/L | 108% |
| May 2026 | BOD, 5-day, percent removal, monthly average minimum | 0 | ≥ 65 % | 186% |
| May 2026 | E. coli, 30-day geometric mean | > 2420 | ≤ 206 #/100mL | — |
| May 2026 | E. coli, 7-day geometric mean | > 2420 | ≤ 1030 #/100mL | — |
| May 2026 | Nitrogen, ammonia total [as N], daily maximum | 26 | ≤ 23 mg/L | 13% |
| May 2026 | Nitrogen, ammonia total [as N], monthly average | 26 | ≤ 2.9 mg/L | 797% |
| May 2026 | Solids, suspended percent removal, monthly average minimum | 28 | ≥ 65 % | 106% |
| May 2026 | Solids, total suspended, monthly average | 73 | ≤ 70 mg/L | 4% |
| June 2026 | BOD, 5-day, 20 deg. C, monthly average | 162 | ≤ 45 mg/L | 260% |
| June 2026 | BOD, 5-day, 20 deg. C, weekly average | 162 | ≤ 65 mg/L | 149% |
| June 2026 | BOD, 5-day, percent removal, monthly average minimum | 20 | ≥ 65 % | 129% |
| June 2026 | E. coli, 30-day geometric mean | > 2420 | ≤ 206 #/100mL | — |
| June 2026 | E. coli, 7-day geometric mean | > 2420 | ≤ 1030 #/100mL | — |
| June 2026 | Nitrogen, ammonia total [as N], monthly average | 11.9 | ≤ 1.7 mg/L | 600% |
| July 2026 | E. coli, 30-day geometric mean | > 2420 | ≤ 206 #/100mL | — |
| July 2026 | E. coli, 7-day geometric mean | > 2420 | ≤ 1030 #/100mL | — |
| July 2026 | Nitrogen, ammonia total [as N], daily maximum | 20.6 | ≤ 14.4 mg/L | 43% |
| July 2026 | Nitrogen, ammonia total [as N], monthly average | 20.6 | ≤ 1.4 mg/L | 1371% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | weekly average | ≤ 65 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 45 mg/L | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | weekly average | ≤ 110 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 70 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 | ≤ 10.1 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 23 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.4 mg/L | Jun, Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.4 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.4 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.4 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17 mg/L | Jan, Feb, Mar, Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.9 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.7 mg/L | Jun, Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.4 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.5 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.8 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.2 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.9 mg/L | Jan, Feb, Mar, Nov | 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 | ≤ 1030 #/100mL | Apr–Oct | 001 |
| E. coli | 30-day geometric mean | ≤ 206 #/100mL | Apr–Oct | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 65 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 65 % | 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] | monthly average | report only (mg/L) | all year | INF |
Cited limits by parameter: Missouri's rules and the federal ones.
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