RSA 507-B:9 Pollutant Liability Standard.

I. Notwithstanding any other provision of law, the liability of any governmental unit or public employee for any personal injury, bodily injury, or property damage caused by or resulting from pollutant incidents including, but not limited to, per and polyfluorochemical contamination, shall only be based upon a showing by a preponderance of the evidence that the acts or omissions of the governmental unit were unreasonable. The acts or omissions of a governmental unit or public employee shall be conclusively presumed to be reasonable if they are in accord with the generally prevailing state of the art, scientific knowledge, and technology available to the governmental unit at the time the acts or omissions were undertaken or made by the governmental unit or public employee.
II.