Westland Water Situation *update* 3.2.17

Apologies for for the delay in getting this update out - I've been holidaying and out-of-coverage!

Westland Water Supplies

The Boil Water Notices remain in place for both the Kumara and Arahura water supply catchments.

Council requires three consecutive clear readings before it will lift a Boil Water Notice.  Therefore testing will continue on both the Kumara and Arahura water supplies and the need for a Boil Water Notice will be reviewed next week. 


·        Investigations carried out to date have not revealed a specific cause for the E.coli transgression in Kumara.  The low levels of E.coli detected make it difficult to track and pinpoint the contamination source. 

·        The previous chlorine dosing in Kumara was effective however the boil water notice remains in effect because:

o   Ongoing and significant levels of rainfall in the catchment meant there was a significant risk of further contamination in the untreated water supply, which was proven by later tests.   

o   There was a level of presence of coliform bacteria (not specifically E.coli but an indicator of potential organic contamination) in the water supply. 


·        The cause of the E.coli transgression in the Arahura water supply is still under investigation. 

Kind regards,

Karen Jury
Corporate Planner
Westland District Council

36 Weld Street, Private Bag 704, Hokitika 7842 | www.westlanddc.govt.nz
DDI 03 756 9082| F 03 756 9045Karen.Jury@westlanddc.govt.nz

“Westland – The Last Best Place”