Zircoa Inc

NPDES permit OH0000591 · Minor NON-POTW · effective, expires 2027-06-30 · 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 77 forms filed late

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

Reporting

Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (32)

OutfallParameterStatisticLimitMonths
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Fluoride, total [as F]MO AVG <= 2.8 mg/L all year
001Fluoride, total [as F]MO AVG <= 2.01 kg/d 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
001pH, maximumDAILY MX <= 9 SU all year
001pH, minimumDAILY MN >= 6.5 SU all year
001Solids, total dissolved- 180 deg. CMO AVG <= 1500 mg/L all year
001Solids, total dissolved- 180 deg. CDAILY MX <= 3000 mg/L all year
001Solids, total dissolved- 180 deg. CMO AVG <= 1079 kg/d all year
001Solids, total dissolved- 180 deg. CDAILY MX <= 2157 kg/d all year
002Flow rateMO AVG report only all year
002Flow rateDAILY MX report only all year
003Temperature, water deg. centigradeMO AVG report only all year
003Temperature, water deg. centigradeDAILY MX report only all year
003pHDAILY MN >= 6.5 SU all year
003pHDAILY MX <= 9 SU all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow rateMO AVG report only all year
004Flow rateDAILY MX report only all year
601Solids, total suspendedMO AVG <= 30 mg/L all year
601Solids, total suspendedDAILY MX <= 45 mg/L all year
601Solids, total suspendedMO AVG <= 12.4 kg/d all year
601Solids, total suspendedDAILY MX <= 18.6 kg/d all year
601Flow, in conduit or thru treatment plantMO AVG report only all year
601Flow, in conduit or thru treatment plantDAILY MX report only all year
801Fluoride, total [as F]MO AVG report only all year
801Fluoride, total [as F]DAILY MX report only all year
901Fluoride, total [as F]MO AVG report only all year
901Fluoride, total [as F]DAILY MX report only all year

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