Umicore Optical Materials USA, Inc

NPDES permit OKP003097 · Minor NON-POTW · effective, expires 2030-12-31 · 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 7 forms filed late

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

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among OK permits in EPA's filings — check your permit).

Limits in force (25)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 5 SU all year
001pHMAXIMUM <= 11 SU all year
001Cyanide, total [as CN]MO AVG <= .65 mg/L all year
001Cyanide, total [as CN]DAILY MX <= 1.2 mg/L all year
001Fluoride, total [as F]MO AVG report only all year
001Fluoride, total [as F]DAILY MX report only all year
001Arsenic, total [as As]MO AVG report only all year
001Arsenic, total [as As]DAILY MX report only all year
001Cadmium, total [as Cd]MO AVG <= .07 mg/L all year
001Cadmium, total [as Cd]DAILY MX <= .11 mg/L all year
001Chromium, total [as Cr]MO AVG <= 1.71 mg/L all year
001Chromium, total [as Cr]DAILY MX <= 2.77 mg/L all year
001Copper, total [as Cu]MO AVG <= 2.07 mg/L all year
001Copper, total [as Cu]DAILY MX <= 3.38 mg/L all year
001Lead, total [as Pb]MO AVG <= .43 mg/L all year
001Lead, total [as Pb]DAILY MX <= .69 mg/L all year
001Nickel, total [as Ni]MO AVG <= 2.38 mg/L all year
001Nickel, total [as Ni]DAILY MX <= 3.98 mg/L all year
001Silver, total [as Ag]MO AVG <= .24 mg/L all year
001Silver, total [as Ag]DAILY MX <= .43 mg/L all year
001Zinc, total [as Zn]MO AVG <= 1.48 mg/L all year
001Zinc, total [as Zn]DAILY MX <= 2.61 mg/L 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
001Total toxic organics [TTO] [40 CFR433]DAILY MX <= 2.13 mg/L 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