Safe water every day for everyone Kia tiakina te wai hei oranga mō te katoa
Network Environmental Performance Report 2024/25
We have published the Network Environmental Performance Report 2024/25 providing a valuable evidence base as the water sector enters a period of significant change.
The findings show many networks are under pressure, highlighting the need for better data, maintenance and targeted investment to manage risks to public health, the environment and long-term resilience.
Key findings
- 11,535 wastewater overflows were reported in 2024/25.
- Nearly half of existing wastewater consents will need to be renewed within the next decade.
- Around one-third of councils reported at least one drinking water network with very high leakage levels by international standards.
Latest news and events
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New national report reveals key pressure points across New Zealand's water networks
27 July 2026New Zealand's first complete national picture of public drinking water and wastewater network performance shows many water networks are under pressure, and better data, maintenance and targeted investment is urgently needed.Find out more -
Guidance on the wastewater discharge to land standard published
14 July 2026We’ve published guidance on the wastewater discharge to land standard.Find out more -
Water Services Authority releases position on downstream drinking water suppliers
8 July 2026The Authority is taking steps to improve clarity for downstream drinking water suppliers.Find out more -
Updated drinking water rules published
23 June 2026The Water Services Authority has published the Water Services (Drinking Water Quality Assurance) Rules 2026 which make changes for supplies that provide drinking water to 501 people or more.Find out more
Updated drinking water rules published
We have published the updated Water Services (Drinking Water Quality Assurance) Rules 2026, which make changes for large supplies, following consultation with the sector in late 2025.
The updates are part of our work to make the Rules clearer and easier for drinking water suppliers to understand and apply in practice, and will support the provision of safe, reliable drinking water for communities across Aotearoa New Zealand.
Engaging on national engineering design standards
We’re working with the sector to shape national engineering design standards (NEDS) to create a more consistent approach across New Zealand.
The standards will apply to stormwater, wastewater and drinking water infrastructure managed by councils and water organisations. They will also apply to new infrastructure that connects to, or becomes part of, those networks.
We’re working with councils, providers, developers and technical experts to shape the draft standards. Their input will help us create standards that are practical, affordable and fit for purpose.
