Selwyn drying out

by Kent Caddick

Almost all the boil water notices put in place after the recent flooding around Selwyn have been lifted.

The Selwyn District Council issued precautionary boil water notices for the Acheron, Hororata, Malvern Hills, Springfield and Upper Selwyn Huts supplies last week for turbidity due to heavy rainfall.

When a water supply shows high turbidity, water treatment methods cannot be guaranteed to be effective. 

The boil water notices have been lifted for all areas except for Springfield and council is advising residents on the Springfield supply to continue to boil their water.

A council spokesperson said water supply turbidity levels have now lowered which means the treatment systems can operate effectively.

“Water samples have been taken showing the water supply is clear of E.coli and the water is safe to drink without boiling.” Meanwhile, to help clear Lake Ellesmere from sediment build up and to reduce the lake level following the heavy rainfall the lake has been opened to the sea by Environment Canterbury (ECan).

Lake Ellesmere is the largest lake in Canterbury and has no natural outlet to the sea.

ECan’s river engineering manager Leigh Griffiths said they are conscious the community is keen to see the lake opened to help water drain away and this is happening as early as physically possible. 

“Once the lake is opened, there is limited ability to control how long it stays that way. The length is determined by weather and sea conditions and how quickly gravel is deposited by the sea to close the cut.”