AAR Mobility Systems

NPDES permit MI0002640 · Minor NON-POTW · effective, expires 2027-10-01 · 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

1values over a limit
0required values missing, on 0 form(s)
2of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: Oil & Grease (1).

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 (28)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX = 90 deg F all year
001Thermal DischargeDAILY MX report only May, Jun, Jul, Aug, Sep
001Thermal DischargeDAILY MX <= 4.3 MBTU/hr Jan, Feb, Mar, Apr, Oct, Nov, Dec
001pHDAILY MN = 6.5 SU all year
001pHDAILY MX = 9 SU all year
001Oil & GreaseDAILY MX = 10 mg/L all year
001Phosphorus, total [as P]DAILY MX report only all year
0011,1-DichloroethaneDAILY MX report only all year
0011,1-DichloroethaneDAILY MX report only all year
0011,1-DichloroethyleneDAILY MX report only all year
0011,1-DichloroethyleneDAILY MX report only all year
0011,1,1-TrichloroethaneDAILY MX = 15 ug/L all year
0011,1,1-TrichloroethaneDAILY MX report only all year
001trans-1,2-DichloroethyleneDAILY MX report only all year
001trans-1,2-DichloroethyleneDAILY MX report only all year
001Vinyl chlorideDAILY MX report only all year
001Vinyl chlorideDAILY MX report only all year
001Equipment inspection - visualVALUE report only all year
001Flow, in conduit or thru treatment plantMO MAX report only all year
001Flow, in conduit or thru treatment plantMO MAX report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX = 38 ug/L all year
001TrichloroetheneDAILY MX <= 20 ug/L all year
001TrichloroetheneDAILY MX report only all year
001cis-1,2-DichloroetheneDAILY MX report only all year
001cis-1,2-DichloroetheneDAILY 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