Horizons Regional Council has served the New Zealand Defence Force (NZDF) with an abatement notice to stop discharging contaminants from firefighting foam.

The NZDF will need to report what measures it has taken to Horizons by July 1.

Horizons strategy and regulation group manager Dr Nic Peet said NZDF must cease the unauthorised discharge of a contaminant, namely stormwater that contains Aqueous Fire Fighting Foam (AFFF), on to or into land in circumstances where it may enter water.

Contamination around the Ohakea area first surfaced in December when the drinking water supply to five properties was found to be contaminated with chemicals used in historic firefighting exercises and since banned in New Zealand.

Advertisement

It sparked several investigations including by Horizons and the NZDF which are ongoing.

Defence Force experts found the presence of PFAS in four of the five bores in the Bulls supply network although the amount of PFAS in the water was well below the threshold level in the New Zealand Drinking Water Guidelines.

Peet said Horizons' investigation into the discharge of contaminants in and around Ohakea air base continues.

NZDF have been approached for comment.