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Bituminous Coal And Lignite - Surface, Ackerman, Mississippi. NPDES permit MS0054046, in force until Jan 31, 2030. Last 12 months: no values over a limit, 2 of 79 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Specific conductance | maximum | ≤ 1000 umho/cm | all year | 108 |
| Rainfall duration | monthly average | report only (hr) | all year | 108 |
| Rainfall duration | daily maximum | report only (hr) | all year | 108 |
| pH | minimum | ≥ 6 SU | all year | 108 |
| pH | maximum | ≤ 9 SU | all year | 108 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 108 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 108 |
| Iron, total recoverable | monthly average | ≤ 3 mg/L | all year | 108 |
| Iron, total recoverable | daily maximum | ≤ 6 mg/L | all year | 108 |
| Selenium, total recoverable | monthly average | report only (mg/L) | all year | 108 |
| Selenium, total recoverable | daily maximum | report only (mg/L) | all year | 108 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 108 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 108 |
| Manganese, total recoverable | monthly average | ≤ 2 mg/L | all year | 108 |
| Manganese, total recoverable | daily maximum | ≤ 4 mg/L | all year | 108 |
| Rainfall | monthly average | report only (in) | all year | 108 |
| Rainfall | daily maximum | report only (in) | all year | 108 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 108 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 108 |
| Specific conductance | maximum | ≤ 1000 umho/cm | all year | 110 |
| Rainfall duration | monthly average | report only (hr) | all year | 110 |
| Rainfall duration | monthly maximum | report only (hr) | all year | 110 |
| pH | minimum | ≥ 6 SU | all year | 110 |
| pH | maximum | ≤ 9 SU | all year | 110 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 110 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 110 |
| Iron, total recoverable | monthly average | ≤ 3 mg/L | all year | 110 |
| Iron, total recoverable | daily maximum | ≤ 6 mg/L | all year | 110 |
| Selenium, total recoverable | monthly average | report only (mg/L) | all year | 110 |
| Selenium, total recoverable | daily maximum | report only (mg/L) | all year | 110 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 110 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 110 |
| Manganese, total recoverable | monthly average | ≤ 2 mg/L | all year | 110 |
| Manganese, total recoverable | daily maximum | ≤ 4 mg/L | all year | 110 |
| Rainfall | monthly average | report only (in) | all year | 110 |
| Rainfall | monthly maximum | report only (in) | all year | 110 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 110 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 110 |
| Specific conductance | maximum | ≤ 1000 umho/cm | all year | 111 |
| Rainfall duration | monthly average | report only (hr) | all year | 111 |
| Rainfall duration | daily maximum | report only (hr) | all year | 111 |
| pH | minimum | ≥ 6 SU | all year | 111 |
| pH | maximum | ≤ 9 SU | all year | 111 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 111 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 111 |
| Iron, total recoverable | monthly average | ≤ 3 mg/L | all year | 111 |
| Iron, total recoverable | daily maximum | ≤ 6 mg/L | all year | 111 |
| Selenium, total recoverable | monthly average | report only (mg/L) | all year | 111 |
| Selenium, total recoverable | daily maximum | report only (mg/L) | all year | 111 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 111 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 111 |
| Manganese, total recoverable | monthly average | ≤ 2 mg/L | all year | 111 |
| Manganese, total recoverable | daily maximum | ≤ 4 mg/L | all year | 111 |
| Rainfall | monthly average | report only (in) | all year | 111 |
| Rainfall | daily maximum | report only (in) | all year | 111 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 111 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 111 |
| Specific conductance | maximum | ≤ 1000 umho/cm | all year | 113 |
| Rainfall duration | monthly average | report only (hr) | all year | 113 |
| Rainfall duration | daily maximum | report only (hr) | all year | 113 |
| pH | minimum | ≥ 6 SU | all year | 113 |
| pH | maximum | ≤ 9 SU | all year | 113 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 113 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 113 |
| Iron, total recoverable | monthly average | ≤ 3 mg/L | all year | 113 |
| Iron, total recoverable | daily maximum | ≤ 6 mg/L | all year | 113 |
| Selenium, total recoverable | monthly average | report only (mg/L) | all year | 113 |
| Selenium, total recoverable | daily maximum | report only (mg/L) | all year | 113 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 113 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 113 |
| Manganese, total recoverable | monthly average | ≤ 2 mg/L | all year | 113 |
| Manganese, total recoverable | daily maximum | ≤ 4 mg/L | all year | 113 |
| Rainfall | monthly average | report only (in) | all year | 113 |
| Rainfall | daily maximum | report only (in) | all year | 113 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 113 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 113 |
| Specific conductance | maximum | ≤ 1000 umho/cm | all year | 116 |
| Rainfall duration | monthly average | report only (hr) | all year | 116 |
| Rainfall duration | daily maximum | report only (hr) | all year | 116 |
| pH | minimum | ≥ 6 SU | all year | 116 |
| pH | maximum | ≤ 9 SU | all year | 116 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 116 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 116 |
| Iron, total recoverable | monthly average | ≤ 3 mg/L | all year | 116 |
| Iron, total recoverable | daily maximum | ≤ 6 mg/L | all year | 116 |
| Selenium, total recoverable | monthly average | report only (mg/L) | all year | 116 |
| Selenium, total recoverable | daily maximum | report only (mg/L) | all year | 116 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 116 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 116 |
| Manganese, total recoverable | monthly average | ≤ 2 mg/L | all year | 116 |
| Manganese, total recoverable | daily maximum | ≤ 4 mg/L | all year | 116 |
| Rainfall | monthly average | report only (in) | all year | 116 |
| Rainfall | daily maximum | report only (in) | all year | 116 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 116 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 116 |
| Specific conductance | maximum | ≤ 1000 umho/cm | all year | 117 |
| Rainfall duration | monthly average | report only (hr) | all year | 117 |
| Rainfall duration | daily maximum | report only (hr) | all year | 117 |
| pH | minimum | ≥ 6 SU | all year | 117 |
| pH | maximum | ≤ 9 SU | all year | 117 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 117 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 117 |
| Iron, total recoverable | monthly average | ≤ 3 mg/L | all year | 117 |
| Iron, total recoverable | daily maximum | ≤ 6 mg/L | all year | 117 |
| Selenium, total recoverable | monthly average | report only (mg/L) | all year | 117 |
| Selenium, total recoverable | daily maximum | report only (mg/L) | all year | 117 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 117 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 117 |
| Manganese, total recoverable | monthly average | ≤ 2 mg/L | all year | 117 |
| Manganese, total recoverable | daily maximum | ≤ 4 mg/L | all year | 117 |
| Rainfall | monthly average | report only (in) | all year | 117 |
| Rainfall | daily maximum | report only (in) | all year | 117 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 117 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 117 |
| Specific conductance | maximum | ≤ 1000 umho/cm | all year | 213 |
| Rainfall duration | annual average | report only (hr) | all year | 213 |
| Rainfall duration | annual maximum | report only (hr) | all year | 213 |
| pH | minimum | ≥ 6 SU | all year | 213 |
| pH | maximum | ≤ 9 SU | all year | 213 |
| Solids, settleable | annual average | report only (mL/L) | all year | 213 |
| Solids, settleable | annual maximum | ≤ .5 mL/L | all year | 213 |
| Rainfall | annual average | report only (in) | all year | 213 |
| Rainfall | annual maximum | report only (in) | all year | 213 |
| Flow, in conduit or thru treatment plant | annual average | report only (MGD) | all year | 213 |
| Flow, in conduit or thru treatment plant | annual maximum | report only (MGD) | all year | 213 |
| Specific conductance | maximum | ≤ 1000 umho/cm | all year | 214 |
| Rainfall duration | annual average | report only (hr) | all year | 214 |
| Rainfall duration | annual maximum | report only (hr) | all year | 214 |
| pH | minimum | ≥ 6 SU | all year | 214 |
| pH | maximum | ≤ 9 SU | all year | 214 |
| Solids, settleable | annual average | report only (mL/L) | all year | 214 |
| Solids, settleable | annual maximum | ≤ .5 mL/L | all year | 214 |
| Rainfall | annual average | report only (in) | all year | 214 |
| Rainfall | annual maximum | report only (in) | all year | 214 |
| Flow, in conduit or thru treatment plant | annual average | report only (MGD) | all year | 214 |
| Flow, in conduit or thru treatment plant | annual maximum | report only (MGD) | all year | 214 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 301 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 301 |
| pH | minimum | report only (SU) | all year | 301 |
| pH | maximum | report only (SU) | all year | 301 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 301 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 301 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 301 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 301 |
| Chlorine, total residual | minimum | ≥ .1 mg/L | all year | 301 |
| Chlorine, total residual | maximum | ≤ 1 mg/L | all year | 301 |
| E. coli | monthly average | ≤ 126 #/100mL | all year | 301 |
| E. coli | daily maximum | ≤ 410 #/100mL | all year | 301 |
Cited limits by parameter: Mississippi's rules and the federal ones.
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