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Industrial Inorganic Chemicals, Charleston, Tennessee. NPDES permit TN0081311, in force until Mar 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 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 |
| Solids, total dissolved | daily maximum | ≤ 117588 lb/d | all year | 001 |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | minimum | ≥ 1.7 % mortality | all year | 001 |
| LC50 Static 48Hr Acute Pimephales promelas | minimum | ≥ 1.7 % mortality | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | IMP1 |
| pH | daily maximum | ≤ 9 SU | all year | IMP1 |
| Flow, in conduit or thru treatment plant | total | report only (MGD) | all year | IMP1 |
| Oil and grease visual | value | report only (N=0;Y=1) | all year | IMP1 |
| pH | daily minimum | ≥ 6 SU | all year | IMP2 |
| pH | daily maximum | ≤ 9 SU | all year | IMP2 |
| Flow, in conduit or thru treatment plant | total | report only (MGD) | all year | IMP2 |
| Oil and grease visual | value | report only (N=0;Y=1) | all year | IMP2 |
| pH | daily minimum | ≥ 6 SU | all year | IMP3 |
| pH | daily maximum | ≤ 9 SU | all year | IMP3 |
| Flow, in conduit or thru treatment plant | total | report only (MGD) | all year | IMP3 |
| Oil and grease visual | value | report only (N=0;Y=1) | all year | IMP3 |
| pH | daily minimum | ≥ 6 SU | all year | IMP4 |
| pH | daily maximum | ≤ 9 SU | all year | IMP4 |
| Flow, in conduit or thru treatment plant | total | report only (MGD) | all year | IMP4 |
| Oil and grease visual | value | report only (N=0;Y=1) | all year | IMP4 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4 mg/L (alert, not enforceable) | all year | SW1 |
| Nitrite + Nitrate total [as N] | daily maximum | ≤ .68 mg/L (alert, not enforceable) | all year | SW1 |
| Magnesium, total [as Mg] | daily maximum | ≤ .064 mg/L (alert, not enforceable) | all year | SW1 |
| Copper, total [as Cu] | daily maximum | ≤ .018 mg/L (alert, not enforceable) | all year | SW1 |
| Iron, total [as Fe] | daily maximum | ≤ 5 mg/L (alert, not enforceable) | all year | SW1 |
| Aluminum, total [as Al] | daily maximum | ≤ .75 mg/L (alert, not enforceable) | all year | SW1 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) (alert, not enforceable) | all year | SW1 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4 mg/L (alert, not enforceable) | all year | SW4 |
| Nitrite + Nitrate total [as N] | daily maximum | ≤ .68 mg/L (alert, not enforceable) | all year | SW4 |
| Magnesium, total [as Mg] | daily maximum | ≤ .064 mg/L (alert, not enforceable) | all year | SW4 |
| Copper, total [as Cu] | daily maximum | ≤ .018 mg/L (alert, not enforceable) | all year | SW4 |
| Iron, total [as Fe] | daily maximum | ≤ 5 mg/L (alert, not enforceable) | all year | SW4 |
| Aluminum, total [as Al] | daily maximum | ≤ .75 mg/L (alert, not enforceable) | all year | SW4 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) (alert, not enforceable) | all year | SW4 |
Cited limits by parameter: Tennessee's rules and the federal ones.
Same industry: the 30 Chemicals and Allied Products permits in Tennessee.
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