The Environmental Protection Authority (EPA) of New Zealand has declared ‘an immediate ban’ i.e. from 22nd October 2026 on two pesticides, Fenthion and Propoxur Phat were previously used for flea control and other pest management purposes. Following a formal reevaluation of their dangers, the decision-making committee has withdrawn all approvals for these active ingredients and products containing them.

According to the EPA, both insecticides endanger human health, the aquatic environment, and terrestrial vertebrates and invertebrates. Fenthion was historically utilized in pet flea treatments, whilst propoxur was employed for residential and commercial insect pest control.

The restriction followed a reconsideration process that included public consultations from July 15 to August 26, 2026. The EPA received one submission supporting its proposed position. The absence of other submissions, combined with the available evidence, confirmed the authority’s conclusion that these compounds were no longer in use in New Zealand.

The experts in Hazardous Substances Reassessments at the EPA highlighted that all hazardous substances must be approved for usage in New Zealand. Because these approvals do not expire automatically, a formal evaluation is required to change or withdraw current ones.

The decision reflects broader international worries about the safety of these insecticides. Fenthion is not approved for use in Australia, the United States, Canada, or the European Union due to potential human health hazards. It is also highly poisonous to birds and was historically employed to manage pest bird populations. Propoxur’s use is restricted in the United States and Canada, and it is not approved for use in EU.

Regulatory significance: Fenthion and Propoxur Banned in New Zealand

This ruling emphasizes the significance of periodically reviewing existing pesticide approvals to address health and environmental hazards, even if the compounds are no longer in current use. It also emphasizes the need of regulatory authorities in assessing legacy approvals and harmonizing pesticide authorizations with current safety standards.