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Imperial Zinc Corp

Secondary Nonferrous Metals, Minerva, Ohio. NPDES permit OH0139408, in force until Aug 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (15 values)
Renewal application due
Mar 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (15)

ParameterStatisticLimitMonths
Color, spectrophoto-metric filtermonthly averagereport only (severity)all year
Color, spectrophoto-metric filterdaily maximumreport only (severity)all year
pHdaily minimum≥ 6.5 SUMar, Jun, Sep, Dec
pHdaily maximum≤ 9 SUMar, Jun, Sep, Dec
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/LMar, Jun, Sep, Dec
Copper, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Sep, Dec
Copper, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Sep, Dec
Oil & grease severitymonthly averagereport only (severity)all year
Oil & grease severitydaily maximumreport only (severity)all year
Rainfallmonthly averagereport only (in)all year
Rainfalldaily maximumreport only (in)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)Mar, Jun, Sep, Dec
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)Mar, Jun, Sep, Dec

Cited limits by parameter: Ohio's rules and the federal ones.

Same industry: the 56 Primary Metal Industries permits in Ohio.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0139408 · MCP: https://passage-data.com/mcp