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.
Westland District Council
36 Weld Street, Private Bag 704, Hokitika 7842 | www.westlanddc.govt.nz
DDI 03 756 9082| F 03 756 9045| Karen.Jury@westlanddc.govt.nz
“Westland – The Last Best Place”