Water Services Act 2021

The Water Services Act 2021 is New Zealand’s main framework for regulating drinking water safety. Its main purpose is to ensure that drinking water suppliers provide safe drinking water to consumers through a regulatory framework. That framework includes a duty to have a drinking water safety plan and to comply consistently with legislative requirements such as drinking water standards.

For a business owner, this matters if your organisation owns, controls or operates a supply that provides drinking water to other people. The Act is not just about water quality testing. It also deals with registration, planning, notifications, records, consumer information, complaints, source water, emergency powers, authorised operators, laboratory accreditation and enforcement.

The Act also contains targeted rules for wastewater networks, stormwater networks and National Engineering Design Standards for water services networks. Those parts are important, but they do not automatically apply to every business site with plumbing or a water connection.

The Act uses specific definitions for drinking water, safe drinking water, drinking water supplier, drinking water supply, domestic self-supply, shared domestic supplier, operator, owner, point of supply and mixed-use rural water scheme. Those definitions matter because many duties in Part 2 apply only to a drinking water supplier, owner or operator.

That means you should not assume the Act applies in the same way to every site with taps, tanks or plumbing. A business connected to a public town supply may simply be a consumer. A business that owns or operates a separate supply for other people may have direct obligations under the Act.

The Act also says duties are not transferable, one person may have more than one duty, and more than one person may have the same duty. In practice, that means contracts and outsourcing arrangements do not automatically remove legal responsibility.

The Act becomes a day-to-day business issue when your organisation is responsible for supplying drinking water, not just consuming it. The practical trigger is often operational control. If your business draws, stores, treats or distributes water for others to drink, you should check whether you are within the Act’s drinking water framework.

Another trigger point is change. The Act includes duties around registration, renewal of registration and notifying changes. It also creates duties for planned events, unplanned supply events, notifiable risks or hazards, contamination issues and situations where sufficient quantity of drinking water is at imminent risk.

Testing and staffing can also trigger obligations. If your compliance depends on water sampling, laboratory analysis or operator competence, the Act’s authorisation, qualification and accreditation provisions may become relevant.

Part 2 sets out the core duties relating to the supply of drinking water. These include the duty to supply safe drinking water and the duty to comply with drinking water standards. The Act also requires the owner of a drinking water supply to register the supply.

Beyond safety and registration, the Act requires reasonable steps to supply aesthetically acceptable drinking water, a duty to provide sufficient quantity of drinking water, duties where sufficient quantity is at imminent risk, and a duty to protect against risk of backflow. There are also duties relating to end-point treatment.

These are operational duties. They are not limited to paperwork. A business that is in scope needs to be able to show how the supply is managed in practice, how risks are controlled, and how incidents are handled when something goes wrong.

The Act does not stop at the entity that owns the supply. It includes a duty for officers, employees and agents of a drinking water supplier to exercise due diligence. That is a specific duty under this Act and should be taken seriously by the people involved in running the supply.

The owner must also have a drinking water safety plan. The Act then deals with what drinking water safety plans are for, review of those plans, and compliance monitoring. It also addresses planned events and unplanned supply of drinking water.

For a business, this means compliance should be built into operations. You need clear responsibilities, documented procedures and a practical response plan. A test result on its own is not enough if the wider system is not being managed properly.

The Act requires suppliers to notify the Water Services Authority of a notifiable risk or hazard. It also includes other notification duties for drinking water suppliers, and a specific notice requirement to warn users of domestic self-supply or shared domestic supply about contamination.

Record keeping is another core compliance area. Drinking water suppliers must keep records. If your business is in scope, you should be able to show what happened, when it happened, what action was taken, and who was told.

The Act also requires a supplier to provide information to consumers and have a complaints process. Regulations may prescribe some of the information that suppliers, or classes of suppliers, must provide to consumers. Businesses should check both the Act and any current regulations before setting up their process.

The Act is not only about the water that reaches the consumer. It also creates a source water risk management framework. This includes source water risk management plans, monitoring of source water quality, information sharing with local authorities and publication of source water information by regional councils.

If your business relies on a source that could be affected by surrounding land use, runoff, contamination or environmental conditions, source water obligations may be a major part of compliance. Looking only at treatment equipment is not enough if the source itself is exposed to unmanaged risk.

The source water provisions have their own application rules, so businesses should check whether that subpart applies to their supply and how it interacts with other environmental requirements.

The Act recognises that safe water depends on competent people and reliable testing. It requires operators to be authorised. It also allows for prescribed skills, qualifications or experience in respect of drinking water supply or wastewater network roles, and for water sampling.

The Act also requires use of an accredited laboratory to analyse water. It provides for appointment of an accreditation body, accreditation criteria, applications, suspension or revocation, and a register of accredited laboratories.

For businesses, the practical point is simple. Do not assume any staff member or contractor can perform regulated tasks without checking the legal requirements. If your compliance depends on sampling and analysis, make sure the laboratory and the process meet the Act’s framework.

The Act gives compliance officers and the chief executive significant enforcement tools. These include powers to take and test samples, conduct inquiries or inspections, obtain information, require name and address details, question a drinking water supplier, and enter and inspect in certain circumstances. In serious public health situations, there are powers to enter without a search warrant.

The chief executive may serve a compliance order on any person in certain circumstances. A compliance order can require a person to stop conduct, not start conduct, or do something to ensure compliance or prevent, reduce or eliminate a serious risk to public health related to a drinking water supply. A person served with a compliance order must comply within the period stated in the order unless appeal rights change the position.

The Act also includes infringement offences, criminal proceedings and a range of offences, including offences relating to unsafe drinking water, failure to notify notifiable risks or hazards, supply from an unregistered supply, failures relating to safety plans, records, authorisations, planned or unplanned events and consumer complaints.

The Act also contains separate Parts dealing with wastewater environmental performance standards, wastewater network risk management plans, stormwater environmental performance standards, infrastructure design solutions, and National Engineering Design Standards for water services networks.

These provisions are more targeted than the core drinking water duties. The National Engineering Design Standards provisions are directed at water service providers and compliance with sections dealing with vesting, connecting infrastructure to a network, construction, repair, replacement, maintenance and decommissioning. They should not be read as automatically applying to every ordinary business site.

The wastewater and stormwater network provisions are also targeted. The Act’s related amendments show those network concepts are tied to infrastructure and processes operated by, for, or on behalf of specified public sector bodies, with some roles extending to people operating networks for those bodies. If your business is acting as or for a water service provider or network operator, check the exact application rules before relying on a general summary.

This is a principal Act and it is in force. It received Royal assent on 4 October 2021. Most of the Act came into force on 15 November 2021, and section 58 came into force on 1 March 2022. The current official consolidated version is stated as at 1 July 2026.

Before relying on a high-level summary, confirm exactly where your business sits in the Act. Many obligations depend on whether you are a drinking water supplier, owner, operator, domestic self-supplier, shared domestic supplier, mixed-use rural water scheme participant, or another person covered by a specific subpart.

You should also check the current drinking water standards, any regulations made under the Act, and whether amendments have changed the position for your type of supply. If your arrangement is shared, outsourced, mixed-use or technically unusual, get the definitions and responsibility split checked early.