Gelman Sciences LLC

NPDES permit MI0048453 · Minor NON-POTW · effective, expires 2028-10-01 · 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)
1of 11 forms filed late

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

Reporting

Reports are due about 21 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (21)

OutfallParameterStatisticLimitMonths
001Hydrogen peroxideMO AVG < 50 ug/L all year
001Hydrogen peroxideDAILY MX report only all year
001Hydrogen peroxideMO AVG report only all year
001Hydrogen peroxideDAILY MX report only all year
001OzoneDAILY MX < 10 ug/L all year
001OzoneDAILY MX report only all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Chloride [as Cl]DAILY MX report only all year
001Sulfate, total [as SO4]DAILY MX report only all year
001Barium, total [as Ba]DAILY MX report only all year
001Equipment inspection - visualVALUE 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
001Sodium BisulfiteDAILY MX report only all year
001BromateMO AVG <= 10 ug/L all year
001BromateDAILY MX report only all year
0011,4-DioxaneMO AVG <= 7 ug/L all year
0011,4-DioxaneDAILY MX <= 22 ug/L all year
0011,4-DioxaneDAILY MX report only all year
001Outfall observation,visual, y/n responseVALUE 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