NSW EPA The NSW Environment Protection Authority (EPA) is urging people to carefully follow instructions when using pesticides, or risk poisoning or other serious health conditions. The reminder comes after several recent poisonings from the product Mouseoff, which contains zinc phosphide, resulted in hospitalisations in Western NSW Local Health District. Mouseoff is clearly labelled as a high-risk commercial product, used for rodent control, and only approved to be used in agricultural and/or industrial and commercial settings. EPA Executive Director Regulatory Operations Carmen Dwyer said the EPA had commenced an investigation into the potential supply of Mouseoff to customers for domestic use.