Environmental protection: air pollution; calculation of emission profile data; modify. Amends sec. 5503 of 1994 PA 451 (MCL 324.5503).
Key claim: HB5557 proposes to amend Michigan’s Natural Resources and Environmental Protection Act to modify the calculation methodology for emission profile data under the air pollution provisions.
Abstract
(HB5557 · 103rd Legislature) Environmental protection: air pollution; calculation of emission profile data; modify. Amends sec. 5503 of 1994 PA 451 (MCL 324.5503). Latest action (2026-06-10): Referred To Committee On Natural Resources And Agriculture
Why this matters
Emission profile data underpins how EGLE assesses air-quality impacts from regulated sources under Part 55 of NREPA, so changing the calculation methodology can shift compliance obligations for industrial emitters even without altering underlying standards. As a passed-chamber amendment, HB5557 signals legislative interest in fine-tuning the technical basis of Michigan air pollution regulation, with downstream consequences for permitting inputs and emissions inventories.