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Sewerage Systems, Millington, Tennessee. NPDES permit TN0067482, in force until Apr 30, 2027. Last 12 months: over a limit 3 times (last September 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| June 2026 | E. coli, daily maximum | 2420 #/100mL | ≤ 941 #/100mL | 157% |
| June 2026 | E. coli, monthly geometric mean | 205 #/100mL | ≤ 126 #/100mL | 63% |
| September 2026 | E. coli, monthly geometric mean | 129 #/100mL | ≤ 126 #/100mL | 2% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 1 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 65 mg/L | all year |
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 100 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 120 mg/L | all year |
| Solids, settleable | daily maximum | ≤ 1 mL/L | all year |
| Flow, in conduit or thru treatment plant | value | report only (gal/min) | all year |
| Flow, in conduit or thru treatment plant | rolling average | report only (MGD) | all year |
| Chlorine, total residual | daily maximum | ≤ 2 mg/L | all year |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | all year |
| E. coli | daily maximum | ≤ 941 #/100mL | all year |
Cited limits by parameter: Tennessee's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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