Dairy Effluent Warrant of Fitness

The Effluent WOF programme consists of a voluntary, independent inspection of a farmer’s effluent infrastructure and practices.

After extensive testing with over 200 farmers, Effluent WOF is now available to farmers and rural professionals around the country.

The Effluent WOF programme is insightful and practical, covering the entire effluent system.

An independent assessor points out areas of risk and suggest practical actions a farmer can take to ensure their system is capable of being compliant 365 days a year.

A 3-4 hour assessment by the accredited assessor covers the farm’s effluent consents and permitted rules, the storage capacity, nutrient loadings, soil risk, irrigator performance, off-pasture infrastructure and general health and safety requirements.

All WoF Assessors are trained professionals who are fully certified as Warrant of Fitness Assessors. Every assessor has completed the Farm Dairy Effluent System Warrant of Fitness Course and a subsequent field assessment.


  • Buying or selling a farm?

    Know if the system is fit for purpose or if you need to factor upgrades into the offer.

  • Are you a share milker coming onto a property?

    Find out what the risk is for your farm.

  • Upgraded the effluent system yourself?

    Find out how well the effluent system is performing and reassurance that your system is fit for purpose.

  • Budgeted for an upgrade to the system?

    An independent person who assesses the current system will help with decision making.

  • Did you know?

    Corporate Board members and absent owners can be liable if there is inadequate effluent infrastructure on a farm.

Hazel Carr

Kakariki Environmental Consultants



Kakariki Environmental Consultants
545 Main Drain Road, RD5
 Rangiora 7475
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027 757 7195
Southland / Otago

Hazel Carr is an environmental consultant for Kakariki Environmental Consultants. She holds a Bachelor of Agricultural Science with First Class Honours from Lincoln University. Certified Nutrient Management Adviser and Certified Dairy Effluent Warrant of Fitness Assesor.

Currently contract milking in North Canterbury she has a good understanding of the daily aspects of farming and can connect and communicate well with farmers. For the last 2 years she has worked as a farm environmental consultant and continued to develop her knowledge around regional council requirements and the use of nutrient management tools such as Overseer.

Hazel formed Kakariki Environmental Consultants in 2019 with the aim of assisting farmers with all environmental aspects of farming. She enjoys working with farmers to help them achieve their goals, develop their business and meet regional council requirements. She is competent at completing in depth, yet farmer friendly nutrient management plans and Farm Environment Plans. She has recently completed the necessary training to become an Effluent Warrant of Fitness Assessor and has been working hard with farmers throughout Canterbury to help assess their effluent systems and provide recommendations for improvement where required. 

Her passion for, and involvement in the dairy industry help her to relate to farmers and provide the advice and support they require in all environmental aspects of their business.



Certified WOF assessors offer a very thorough and consistent assessment of effluent systems.

A certified assessor is an independent, experienced industry professional.

To become certified, the assessor has completed a three-day training course and passed a competency assessment process.

The assessor is committed to observing a Code of Conduct to guarantee professional behaviour and independent advice.

Certified WOF Assessors use the same methodology every time.


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The assessment includes the farm's effluent consents and permitted rules, storage capacity, nutrient loadings, soil risk, and health and saftey..

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