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DTE Energy Company

Gas Transmission And Distribution, Six Lakes, Michigan. NPDES permit MI0003662, in force until Oct 1, 2028. Last 12 months: over a limit once (last August 2026), 3 of 36 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: outfall 001 form A monthly (7 values), outfall IN1 form A monthly (5 values), outfall IN2 form A monthly (2 values)
Renewal application due
Apr 4, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 36 reports late

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

Period endingParameterReportedLimit
August 2026pH, daily maximum14≤ 9 SU

Limits in force (14)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year001
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all yearIN1
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all yearIN1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearIN1
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearIN1
Cooling Water Intake Velocitydaily maximum= .5 ft/secall yearIN1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearIN2
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearIN2

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

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/MI0003662 · MCP: https://passage-data.com/mcp