GM Components Holdings LLC — NPDES permit MI0001236: limits, due date and EPA's record

NPDES permit MI0001236 · Minor NON-POTW · administratively continued, expires 2025-10-01 · EPA's file as of 2026-09-19

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.

This permit expired on 2025-10-01 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

Reporting

Reports are due about 21 days after each monitoring period ends (the most common figure among MI permits in EPA's filings — check your permit).

Limits in force (21)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
001	pH	DAILY MN	>= 6.5 SU	all year
001	pH	DAILY MX	<= 9 SU	all year
001	Oil & Grease	DAILY MX	<= 10 mg/L	all year
001	Copper, total [as Cu]	DAILY MX	report only	all year
001	Cyanide [A]	DAILY MX	report only	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	Outfall observation,visual, y/n response	VALUE	report only	all year
002	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
002	pH	DAILY MN	>= 6.5 SU	all year
002	pH	DAILY MX	<= 9 SU	all year
002	Oil & Grease	DAILY MX	<= 10 mg/L	all year
002	Copper, total [as Cu]	DAILY MX	report only	all year
002	Cyanide [A]	MO AVG	= 5.2 ug/L	all year
002	Cyanide [A]	DAILY MX	report only	all year
002	Cyanide [A]	MO AVG	= .076 lb/d	all year
002	Cyanide [A]	DAILY MX	report only	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Outfall observation,visual, y/n response	VALUE	report only	all year