There are some concerns for a few home owners if the rain water from our roofing systems is safe for drinking. Roof water testing has been done in the past so many times, now we have done another test recently.
The first 25mm of rainfall from a newly installed roof should be discarded before drinking water collection starts, and always disconnect downpipes when painting a roof. Spouting should be regularly cleaned to avoid the build-up of dirt and debris that can affect water quality.
We collected rain water straight from the roof and sent to the laboratory. It meets the Drinking Water Standards of NZ 2005 (revised 2008). The Drinking-Water Standards for New Zealand provide requirements for drinking-water safety. The Standard is available on the Ministry of Health website at this link.