AK SB121

Requires the Department of Environmental Conservation to ensure responsible parties test for perfluoroalkyl and polyfluoroalkyl substances (PFAS) in drinking water supplies when these substances are released, with specific concentration limits for seven PFAS compounds ranging from 6 to 400,000 parts per trillion.

Establishes liability for PFAS contamination costs: persons causing fires with PFAS-containing firefighting substances are liable for drinking water and testing costs (except residential fires or motor vehicles), and government agencies requiring PFAS releases are liable for associated costs.

Restricts use of PFAS-containing firefighting substances to oil and gas industry personnel unless the state fire marshal adopts regulations requiring alternatives; allows individuals to dispose of up to 25 gallons per year through the department.

Requires facilities conducting thermal remediation of PFAS contamination to obtain an air quality permit and prohibits permits if remediation releases more than minimal amounts of detectable airborne compounds with carbon-fluorine bonds.

Takes effect January 1, 2023, with retroactive application to PFAS releases occurring before the effective date.