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Industrial Inorganic Chemicals, major discharger, Erwin, Tennessee. NPDES permit TN0002038, in force until Feb 28, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 40 mg/L | all year |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 20 mg/L | all year |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 30 mg/L | all year |
| Nitrite + Nitrate total [as N] | daily maximum | ≤ 420 lb/d | all year |
| Fluoride, total [as F] | monthly average | ≤ 15 mg/L | all year |
| Fluoride, total [as F] | daily maximum | ≤ 20 mg/L | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Cadmium, total [as Cd] | daily maximum | ≤ .01 mg/L | all year |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Copper, total [as Cu] | daily maximum | ≤ 1 mg/L | all year |
| Lead, total [as Pb] | daily maximum | ≤ .1 mg/L | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Silver, total [as Ag] | daily maximum | ≤ .05 mg/L | all year |
| Uranium, total | monthly average | ≤ 2 mg/L | all year |
| Uranium, total | daily maximum | ≤ 4 mg/L | all year |
| Tetrachloroethylene | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | daily maximum | ≤ 2 mg/L | all year |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year |
| Mercury, total [as Hg] | monthly average | ≤ .00037 mg/L | all year |
| Mercury, total [as Hg] | daily maximum | ≤ .05 mg/L | all year |
| Chemical Oxygen Demand [COD] | daily maximum | ≤ 370 mg/L | all year |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | minimum | report only (%) | all year |
| LC50 Static 48Hr Acute Pimephales promelas | minimum | report only (%) | all year |
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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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/TN0002038 · MCP: https://passage-data.com/mcp