This report summarises drinking-water compliance for the 485 registered New Zealand networked drinking-water supplies that served populations of more than 100 people in the period from 1 July 2020 to 30 June 2021.

Some of the key health findings during the reporting period are:

• 95.6 percent of the reported population (4,017,000 people) received drinking-water that complied with the bacteriological Standards, which is an increase of 0.4 percent compared with the previous period. Bacterial contamination in the drinking-water supply is a key public health risk so it’s important to maintain compliance.
• 78.7 percent of the reported population (3,305,000 people) received drinking-water that complied with the protozoal Standards, which is a decrease of 1.3 percent compared with the previous period.
• 98.9 percent of the report population (4,157,000 people) received drinking-water that complied with the chemical Standards, which is a decrease of 0.2 percent compared with the previous period.