STEPAN CO

NPDES permit NJ0128325 · Minor NON-POTW · expired, expires 2020-08-31 · 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.

This permit expired on 2020-08-31 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
36required values missing, on 2 form(s)
0of 6 forms filed late

Last period with anything received: 2026-02-28.

Reporting

Reports are due about 27 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (36)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHDAILY MN report only all year
001pHDAILY MX report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Oil & grease [freon extr.-IR meth] tot, RCMO AVG report only all year
001Oil & grease [freon extr.-IR meth] tot, RCDAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrite plus nitrate dissolved 1 det.MO AVG report only all year
001Nitrite plus nitrate dissolved 1 det.DAILY MX report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Surfactants [MBAS]MO AVG report only all year
001Surfactants [MBAS]DAILY MX report only all year
001Chemical Oxygen Demand [COD]MO AVG report only all year
001Chemical Oxygen Demand [COD]DAILY MX report only all year
002BOD, 5-day, 20 deg. CMO AVG report only all year
002BOD, 5-day, 20 deg. CDAILY MX report only all year
002pHDAILY MN report only all year
002pHDAILY MX report only all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Oil & grease [freon extr.-IR meth] tot, RCMO AVG report only all year
002Oil & grease [freon extr.-IR meth] tot, RCDAILY MX report only all year
002Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
002Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
002Nitrite plus nitrate dissolved 1 det.MO AVG report only all year
002Nitrite plus nitrate dissolved 1 det.DAILY MX report only all year
002Phosphorus, total [as P]MO AVG report only all year
002Phosphorus, total [as P]DAILY MX report only all year
002Surfactants [MBAS]MO AVG report only all year
002Surfactants [MBAS]DAILY MX report only all year
002Chemical Oxygen Demand [COD]MO AVG report only all year
002Chemical Oxygen Demand [COD]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