The concentration and prevalence of asbestos fibres in Christchurch, New Zealand’s drinking water supply

A report on the presence of asbestos fibres in drinking water supply in Christchurch, New Zealand from ageing asbestos cement reticulated water supply.

By sampling the mains water supply via hydrants, 19 of our 20 samples showed long asbestos
fibres (.10 μm), with an average concentration 0.9 million fibres per litre (MFL). Short asbestos fibres (.0.5 μm) had an average concentration
of 6.2 MFL. Sampling was targeted to pipes from 1930 to the 1960s and there was abundant evidence of fibres being released from pipes of
this age.

The concentration and prevalence of asbestos fibres in Christchurch, New Zealand’s drinking water supply