This report summarises drinking-water compliance for the 486 registered networked drinking-water supplies that served populations of more than 100 people in the compliance period from 1 July 2019 to 30 June 2020. The supplies provided water to 4,142,000 people in total.

Key findings:

• The report describes how these supplies met the requirements of the Drinking-water Standards for New Zealand and their progress towards meeting the requirements of the Health Act 1956 during the compliance period.
• Supplies that met all standards for drinking-water quality increased to 78.6 percent of the report population (3,254,000 people), which is an increase of 2.4 percent compared with the previous compliance period.
• Supplies that complied with their duties under the Health Act 1956, such as having water safety plans, monitoring drinking-water and protecting drinking water sources, decreased by 0.5% from the previous compliance period to 96.7 percent (4,003,000). The decrease occurred because a more stringent audit was done by drinking-water assessors for this report.