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AAR Mobility Systems

Fabricated Metal Products, Cadillac, Michigan. NPDES permit MI0002640, in force until Oct 1, 2027. Last 12 months: over a limit once (last October 2025), 2 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: form A monthly (10 values), form B monthly (17 values)
Renewal application due
Apr 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimit
October 2025Oil & Grease, daily maximum> 5.1= 10 mg/L

Limits in force (28)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximum= 90 deg Fall year
Thermal Dischargedaily maximumreport only (MBTU/hr)May–Sep
Thermal Dischargedaily maximum≤ 4.3 MBTU/hrJan, Feb, Mar, Apr, Oct, Nov, Dec
pHdaily minimum= 6.5 SUall year
pHdaily maximum= 9 SUall year
Oil & Greasedaily maximum= 10 mg/Lall year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
1,1-Dichloroethanedaily maximumreport only (ug/L)all year
1,1-Dichloroethanedaily maximumreport only (ug/L)all year
1,1-Dichloroethylenedaily maximumreport only (ug/L)all year
1,1-Dichloroethylenedaily maximumreport only (ug/L)all year
1,1,1-Trichloroethanedaily maximum= 15 ug/Lall year
1,1,1-Trichloroethanedaily maximumreport only (ug/L)all year
trans-1,2-Dichloroethylenedaily maximumreport only (ug/L)all year
trans-1,2-Dichloroethylenedaily maximumreport only (ug/L)all year
Vinyl chloridedaily maximumreport only (ug/L)all year
Vinyl chloridedaily maximumreport only (ug/L)all year
Equipment inspection - visualvaluereport only (N=0;Y=1)all year
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum= 38 ug/Lall year
Trichloroethenedaily maximum≤ 20 ug/Lall year
Trichloroethenedaily maximumreport only (ug/L)all year
cis-1,2-Dichloroethenedaily maximumreport only (ug/L)all year
cis-1,2-Dichloroethenedaily maximumreport only (ug/L)all 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 6 Fabricated Metal Products permits in Michigan.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MI0002640 · MCP: https://passage-data.com/mcp