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New Zealand Releases Three-year Reassessment Plan for Fifteen Approved Hazardous Substances

The reassessment plan focuses on chemicals including aquatic herbicides, chlorpyrifos, oxadiazon, amitrole, etc.

On February 17, 2023, New Zealand’s Environmental Protection Authority (EPA) announced a three-year work plan for reassessments of fifteen approved hazardous substances (HS).

Every HS imported into or manufactured in New Zealand needs to obtain approval under the Hazardous Substances and New Organisms Act (HSNO Act). If new information on an approved HS becomes available and there’s a risk to human health and the environment, the EPA should reassess the approved HS. After the reassessment, a decision should be made on whether to change the rules for using the HS, stipulate more use restrictions, or prohibit the HS entirely. The aim of this work plan is to help increase the transparency of the EPA’s work in this regard, which is one of the changes included in the HSNO (Hazardous Substances Assessments) Amendment Act commencing on November 1, 2022.

Below is the summary table of the work plan. There are 6 reassessments in progress and 9 reassessments due to begin in the next three years, covering aquatic herbicides, synthetic pyrethroids used in insecticides, and vertebrate toxic agents (used to kill or control pests such as rodents), etc.

Substance

Start date

Hydrogen cyanamide

In progress

Actara (active ingredient thiamethoxam)

In progress

Fluazinam

In progress

Synthetic pyrethroids

In progress

Aquatic herbicides

In progress

Chlorpyrifos

In progress

Oxadiazon

Second half of 2023

Alachlor (chloroacetamides)

First half of 2024

Imidacloprid and clothianidin (neonicotinoids)

Second half of 2024

Carbendazim

Second half of 2024

Diuron

Second half of 2024

Brodifacoum, bromadiolone, flocoumafen (vertebrate toxic agents)

Second half of 2025

Domestic use vertebrate toxic agents

Second half of 2025

Amitrole

First half of 2026

Dichlobenil

First half of 2026

This three-year reassessment plan will be updated at least once each year, and the updates will be made public on the EPA website. The next major update is expected to be available in December 2023.

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