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E. I. du Pont de Nemours & Company

Industrial Organic Chemicals, Montague, Michigan. NPDES permit MI0000884 expired Oct 1, 2018; its limits still apply. Last 12 months: over a limit once (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: form A monthly (28 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimit
August 2026Trichloroethylene, daily maximum> .3≤ 10 ug/L

Limits in force (28)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Chloride [as Cl]daily maximumreport only (mg/L)all year
Chloride [as Cl]daily maximumreport only (lb/d)all year
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year
Carbon tetrachloridedaily maximum≤ 21 ug/Lall year
Chloroformdaily maximum≤ 10 ug/Lall year
Methylene chloridedaily maximum≤ 59 ug/Lall year
Tetrachloroethylenedaily maximum≤ 10 ug/Lall year
Trichlorofluoromethanedaily maximum≤ 40 ug/Lall year
1,1,1-Trichloroethanedaily maximum≤ 10 ug/Lall year
trans-1,2-Dichloroethylenedaily maximum≤ 300 ug/Lall year
Dichlorodifluoromethanedaily maximum≤ 50 ug/Lall year
1,1-Dichloro-2,2,2-trifluoroethanedaily maximumreport only (ug/L)all year
1,1-Dichloro-1,2,2,2-tetrafluoroethanedaily maximumreport only (ug/L)all year
Trichloroethylenedaily maximum≤ 10 ug/Lall year
Chlorodifluoromethanedaily maximum≤ 50 ug/Lall year
Equipment inspection - visualvaluereport only (N=0;Y=1)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
Mercury, total [as Hg]monthly averagereport only (ng/L)all year
Mercury, total [as Hg]monthly averagereport only (lb/d)all year
Mercury, total [as Hg]rolling average≤ 3 ng/Lall year
Mercury, total [as Hg]rolling average≤ .00003753 lb/dall year
1,1,2-Trichloro-1,2,2-trifluoroethanedaily maximum≤ 33 ug/Lall year
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year

How strict are these limits?

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

Same industry: the 13 Chemicals and Allied Products permits in Michigan.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MI0000884 · MCP: https://passage-data.com/mcp