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Stepan Co

Industrial Organic Chemicals, Maywood Boro, New Jersey. NPDES permit NJ0003182, in force until Jun 30, 2028. Last 12 months: over a limit 2 times (last March 2026), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 26 days after each period: form A monthly (26 values)
Renewal application due
Jan 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 7 required values missing, 3 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
January 2026BOD, 5-day, 20 deg. C, daily maximum23.7 mg/L≤ 20 mg/L19%
March 2026BOD, 5-day, 20 deg. C, daily maximum105 mg/L≤ 20 mg/L425%

Limits in force (26)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitinstantaneous minimumreport only (deg F)all year
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)all year
Temperature, water deg. fahrenheitinstantaneous minimumreport only (deg F)all year
Temperature, water deg. fahrenheitinstantaneous maximum≤ 86 deg Fall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximum≤ 20 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Hydrocarbons, in H2O, IR, CC14 extractible chromatographmonthly average≤ 10 mg/Lall year
Hydrocarbons, in H2O, IR, CC14 extractible chromatographinstantaneous maximum≤ 15 mg/Lall year
Carbon, tot organic [TOC]monthly averagereport only (mg/L)all year
Carbon, tot organic [TOC]daily maximum≤ 20 mg/Lall year
Zinc, total recoverablemonthly averagereport only (ug/L)all year
Zinc, total recoverabledaily maximumreport only (ug/L)all year
Lead, total recoverablemonthly averagereport only (ug/L)all year
Lead, total recoverabledaily maximumreport only (ug/L)all year
Copper, total recoverablemonthly averagereport only (ug/L)all year
Copper, total recoverabledaily maximumreport only (ug/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Temp. diff. between intake and dischargedaily maximum≤ 20 deg Fall year
Alpha gross radioactivitymonthly averagereport only (pCi/L)all year
Alpha gross radioactivitydaily maximum≤ 15 pCi/Lall year
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 61 %all year

How strict are these limits?

Cited limits by parameter: New Jersey's rules and the federal ones.

Same industry: the 20 Chemicals and Allied Products permits in New Jersey.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NJ0003182 · MCP: https://passage-data.com/mcp