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Sewage treatment plant, major discharger, Manchester, Tennessee. NPDES permit TN0025038, in force until Feb 28, 2029. Last 12 months: over a limit 8 times (last July 2026), 2 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | E. coli, daily maximum | 2420 #/100mL | ≤ 487 #/100mL | 397% |
| November 2025 | E. coli, daily maximum | 770.1 #/100mL | ≤ 487 #/100mL | 58% |
| January 2026 | SSO, Wet Weather, monthly total | 2 occur/mo | ≤ 0 occur/mo | — |
| February 2026 | SSO, Wet Weather, monthly total | 1 occur/mo | ≤ 0 occur/mo | — |
| March 2026 | SSO, Dry Weather, monthly total | 2 occur/mo | ≤ 0 occur/mo | — |
| May 2026 | SSO, Wet Weather, monthly total | 21 occur/mo | ≤ 0 occur/mo | — |
| June 2026 | SSO, Wet Weather, monthly total | 14 occur/mo | ≤ 0 occur/mo | — |
| July 2026 | SSO, Wet Weather, monthly total | 2 occur/mo | ≤ 0 occur/mo | — |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 24 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 32 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 850 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 1134 lb/d | all year | 001 |
| Solids, settleable | daily maximum | ≤ 1 mL/L | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily average | ≤ 301 lb/d | May–Oct | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.6 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 8.6 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 2.4 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.4 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 204 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 57 lb/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 308 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 85 lb/d | May–Oct | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | daily average | ≤ 157 lb/d | May–Oct | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .05 mg/L | all year | 001 |
| E. coli | geometric mean | ≤ 126 #/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 487 #/100mL | all year | 001 |
| SSO, Dry Weather | monthly total | ≤ 0 occur/mo | all year | 001 |
| SSO, Wet Weather | monthly total | ≤ 0 occur/mo | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 20 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 28 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 709 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 992 lb/d | all year | 001 |
| BOD, carbonaceous, percent removal | daily minimum | ≥ 40 % | all year | 001 |
| BOD, carbonaceous, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | daily minimum | ≥ 40 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum | > 29 % | all year | 001 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | minimum | > 29 % | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | INF1 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | INF1 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | INF1 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | INF1 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | INF1 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | INF1 |
Cited limits by parameter: Tennessee's rules and the federal ones.
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