Wis. Stat. § 895.555: Civil liability exemption; anhydrous ammonia.

(1) Liability exemption. Except as provided under sub. (2), any person who owns, maintains, or installs anhydrous ammonia equipment, as defined in s. 101.10 (1) (b), or who uses anhydrous ammonia for any legal purpose is immune from any civil liability for acts or omissions relating to the anhydrous ammonia equipment or to anhydrous ammonia that cause damage or injury to an individual, if that damage or injury occurs during the individual’s violation of s. 101.10 (3) (c), (d), (e), or (f).

(2) Exception. A person is not immune from civil liability under sub. (1) if the damage or injury is caused by the person’s reckless or wanton acts or omissions or by acts or omissions intended by the person to cause damage or injury.