Imperial Zinc Corp

NPDES permit OH0139408 · Minor NON-POTW · effective, expires 2027-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 11 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among OH permits in EPA's filings — check your permit).

Limits in force (15)

OutfallParameterStatisticLimitMonths
001Color, spectrophoto-metric filterMO AVG report only all year
001Color, spectrophoto-metric filterDAILY MX report only all year
001pHDAILY MN >= 6.5 SU Mar, Jun, Sep, Dec
001pHDAILY MX <= 9 SU Mar, Jun, Sep, Dec
001Oil and grease, hexane extr methodDAILY MX <= 10 mg/L Mar, Jun, Sep, Dec
001Copper, total recoverableMO AVG report only Mar, Jun, Sep, Dec
001Copper, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Oil & grease severityMO AVG report only all year
001Oil & grease severityDAILY MX report only all year
001RainfallMO AVG report only all year
001RainfallDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Solids, total dissolved- 180 deg. CMO AVG report only Mar, Jun, Sep, Dec
001Solids, total dissolved- 180 deg. CDAILY MX report only Mar, Jun, Sep, Dec

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states