Drinking Water Assessors

As trained and experienced Drinking Water Assessor’s (DWA) we are able to support Regulatory agencies with drinking-water compliance functions. Such DWA work can include:

Scope 1 – Verification of compliance with the Drinking Water Standards; Annual Survey, writing verification of drinking-water supplier compliance reports, response to transgressions, ground water security assessments, auditing quarterly compliance data (continuous or manual), assessing calculations and methodology for achieving chlorine C.t. values, and UV, Cartridge and membrane validation.

Scope 2 – Supporting DWAs to undertake assessments of drinking-water suppliers in their ability to undertake compliance samples (analysts), and calibrate drinking-water telemetry equipment.

Scope 3 – Assessing the adequacy of Water Safety Plans (WSPs).

Scope 4 – Undertaking inspections to determine whether Water Safety Plans (WSPs) are being ‘implemented’.

Service Planning and Delivery – Aid in the development or review of DWA quality assurance programmes. This can include, developing DWA specific work-plans, developing quality management systems (or quality assurance systems), reviewing existing manuals/procedures/protocols and undertake DWA capacity and efficiency reviews. 

Training and mentoring

This can apply across all the services applicable to District Health Board’s as described above. Wai Comply can also offer specific training opportunities (such as workshops/presentations) to aid DWA staff in any manner of assessment functions.

Quick facts:

  • Training can be run over a single day and can be scaled up or down to suit the needs of the audience.

  • Courses can be delivered at a fixed price (no limits to the number of attendees).

  • Courses can be delivered at any preferred location.

  • Assessment of continuous data includes building knowledge around how programmes such as “WaterOutlook” demonstrate compliance.

Currently Wai Comply can deliver a range of training solutions/packages including:

  • Understanding UV Systems and compliance

  • Membrane Filtration Technology

  • Understanding the Drinking-water Standards for New Zealand

  • Water Safety Planning - The “new” water safety plan framework

Recently, Wai Comply ran a technical training workshop for Waikato District Health Board on ‘Membrane Filtration Technology’ and ‘how to interpret continuous compliance data’. The intent of the training was to provide DWAs with the skills and knowledge to effectively assess membrane treatment technologies against the current Drinking Water Standards for New Zealand. The training overall was extremely well received as feedback from participants included: 

All participants rated the training as “extremely worthwhile"

While participants also commented that; (the course was) “Good mix of high level technical with practical advice” andThe event was enjoyable because it made it easier to apply the complex criteria for membrane assessment.”

If your drinking-water assessment team is in need of such training, we would be more than happy to discuss options for delivering this training with you.

Keith Lewis of Hutt Valley DHB describes his interactions with Wai Comply as an advisor to them for Drinking Water Assessment services

 Water Safety Plans


Water Safety Plans (WSP) - a legislative requirement

The Health Act 1956 requires certain drinking-water suppliers to develop a Water Safety Plan (WSP) for their water supply. Guiding material released by the Ministry of Health being the ‘WSP Framework’ and the ‘WSP Handbook’ has meant that fundamentally water suppliers need to reconsider the way they develop WSPs to meet legislative requirements.


WHAT do Water Safety Plans achieve?

Water safety planning strengthens the focus on preventive measures across the whole drinking-water supply system, moving away from a reliance on after-the-event end-point water quality testing. It promotes a multi-barrier approach to managing risks, which safeguards against the failure of any one barrier. Water safety planning supports continuous improvement and guides day-to-day activities now and into the future.

The essential requirements to achieving an approved WSP should be based around the “10 Components”:

the 10 components.png

How Wai Comply can assist with developing Water Safety Plans?

At Wai Comply our WSPs are specifically formulated and tailored to each water supplier ensuring that the risk assessment and risk management process meets legislative requirements but more importantly thoroughly describes and demonstrates ‘how’ water suppliers are keeping their customers safe. Wai Comply ensures that water suppliers are involved every step of the way when it comes to developing WSPs to instil confidence in the design and implementation of the WSP.

Our WSPs are designed to meet the latest industry requirements (i.e. the Framework and the Handbook). Through the WSP development process we are also able to include the identification and implementation of ‘Critical Control Points’ (CCPs). CCPs ensure current treatment barriers are operating and controlled in a way which prevents contamination events occurring therefore ‘having confidence that drinking-water is safe.

Wai Comply can assist in the development of WSP’s to aid our clients in achieving compliance with the Health Act 1956.

Gisborne District Council engaged Wai Comply for the Water Safety Plans rewrites of two of our water supplies. From facilitating workshops with key stakeholders, writing the plans to assistance in liaising with the Drinking Water Assessor, they knew what to do and then did it on time and within the agreed budget."

Marcus Koll - Team Leader - Water


Water Suppliers


Achieving compliance with the Health Act 1956 and the Drinking-water Standards for New Zealand (DWSNZ)

As a networked drinking-water supplier you are legally required to demonstrate that you are providing safe drinking-water to your customers.

Recent changes to the Health Act 1956 (during 2019) require water suppliers to ensure that all drinking-water supplied to consumers fully complies with the DWSNZ (Section 69V of the Act). This legislative change, coupled with national proposals to establish a dedicated ‘drinking-water regulator’ to increase regulatory compliance across the drinking-water sector, means water suppliers may need to review the way they are providing safe drinking-water and therefore demonstrating compliance with the DWSNZ (and Health Act 1956 generally).

At Wai Comply we have the relevant expertise and experience to aid water suppliers in navigating complex compliance requirements and ensure water suppliers are implementing safe drinking-water practices which meet compliance requirements.

The following services summarised below are areas where Wai Comply can assist you as a water supplier.


Compliance Strategies and Reporting Requirements

Compliance Strategies - Wai Comply can support water suppliers to better understand the DWSNZ through undertaking a comprehensive review of existing compliance approaches across any number of water treatment plants or distribution zones. Given our in-depth knowledge of the DWSNZ we can review existing compliance approaches and determine whether the most robust and appropriate compliance option is being utilised. Our specifically formulated compliance strategies aim to combine all such compliance requirements for all of a water suppliers respective supplies into one succinct document. It is important that across all key DWSNZ and legislative requirements for water suppliers there is ‘consistency of approach’ ensuring that DWSNZ compliance and a WSP (Component 5 of the WSP Framework) are in alignment.

Compliance strategy photo.PNG

Compliance Monitoring Programmes and Reporting - Water suppliers must provide records (data) to Drinking Water Assessors to demonstrate compliance with the DWSNZ. Such records can contain any number of compliance records, from quarterly bacteriological samples (E.coli) to reporting continuous data every minute of the day (24/7). At Wai Comply we are proficient in a range of compliance monitoring and reporting software packages. On behalf of a water supplier we can review and maintain compliance reporting systems in alignment with a WSP (Component 8 of the WSP Framework) ensuring all records are submitted to the Drinking Water Assessor or required individuals within a water suppliers governance structure in a comprehensive manner. 


Responding to Drinking-water events

Responding to drinking-water events (such as transgressions) can be very complex and very demanding of water suppliers and Drinking Water Assessors to respond to. It is of outmost importance that to protect consumers from such events a water supplier needs to ensure that it is adequately prepared to respond to emergency events - “when responding to water supply events time is of the essence”. At Wai Comply we have experience in responding to a number of water supply emergencies (Christchurch and Kaikoura earthquakes, and Havelock North waterborne outbreak) and are proficient in New Zealand based emergency management systems (such as CIMs) which means we are well placed to support water suppliers during these tough times.

At Wai Comply we can assist water suppliers develop communications plans, remedial response plans, undertake emergency response exercises, and develop final reports all which contribute to water suppliers ensuring safe drinking-water is supplied whilst demonstrating adherence with the DWSNZ. It is very important that when undertaking any work in preparation of developing water supply emergency response plans (or contingency response plans) that there is alignment with WSP planning and development (Component 7 of the WSP Framework).

Determining Log-credit requirements and Catchment Sanitary Risk Assessments

Catchment Sanitary Risk Assessments - Undertaking a catchment sanitary risk assessment (CSRA) is a process required by the DWSNZ but demonstrated through the WSP (in alignment with Component 2 of the WSP Framework). Water suppliers should be periodically undertaking reviews of their water supply catchments and determining what sources of contamination (chemical, microbiological and radiological) may exist in the catchment. This process directly aids in determining the risk to the water supply (and abatement through adopting a multi-barrier approach to treatment), and establishing the log-credit compliance requirement for a supply. At Wai Comply we can develop CSRAs for water suppliers in alignment with existing (or developing) WSPs.



Quality Assurance and Auditing

As a drinking-water supplier having an effective and efficient quality assurance (administration) system is an essential tool of achieving compliance with the DWSNZ whilst also being a WSP requirement as detailed in “Component(s) 8 and 10 of the WSP Framework”.  At Wai Comply, we have 10+ years of combined experience working as auditors under ‘Inspection Body (17020)’ accreditation systems. Given our vast experience at Wai Comply we feel we can aid our clients in designing and implementing robust quality assurance practices through the development of; guidelines, protocols, standard operating procedures, and manuals. With our unique 'approach to achieving compliance' we can contribute to instilling any number of quality assurance requirements with confidence.


"Gisborne District Council have recently engaged Wai Comply to be involved on a long-term basis in the upkeep and internal auditing of our Water Supply Quality Management System. Wai Comply have a structured “can do” approach and their high degree of professionalism and competence makes them a trusted advisor to us.”