Update: Tuesday 31 July 2018
We’ve stopped chlorine treatment at Burnside and Farrington pump stations in the North West supply zone.
The move comes as a result of the minor remedial works we’ve done on the above ground well heads to enable them to be signed off as secure. We’ve also isolated the remaining below ground well heads, which means we can stop chlorination.
About 80,000 people are in the North West zone and turning off treatment at these two pump stations means 37 per cent of the zone is getting untreated water, about 30,000 people.
We are working through a similar process to stop chlorination at the following pump stations:
- Thompsons and Grampian in the North West zone
- Hills and Lake Terrace in the Central zone
- Woolston in Ferrymead.
We can only stop using the below ground wells at times of low (winter) water demand. If demand goes up and we need to use the below ground well heads, the water from the pump station will need to be treated.