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Image by Leon Ephraïm

Our Story

40 Years in the Dairy Industry.  Unmatched knowledge base.  Trusted Team.

Born and bred in the spirit of number eight wire Effluent & Irrigation are part of the EID Group that offers a number of innovative products that help dairy farmers achieve a whole lot more with less.

Proudly 100% New Zealand owned, we service the nation's agri-sector from the Far North to Bluff.

Effluent & Irrigation


Effluent & Irrigation was founded by Marty Forster in 1998, originally starting out as a contract business for cleaning ponds.  The team quickly identified the farmer's need for help when it came to installing and servicing effluent systems, adding this to the bow of Effluent & Irrigation's Services.

As the company grew in size and demand, so too did the company structure.  It evolved into what is now known as  'Effluent & Irrigation Design' in 2002 to meet the market need for independent solutions.  The market was slowly being saturated with many effluent system options and there was a need for an independent consultancy service that would analyse the specific needs of the farm and its process, and then design the ideal system to suit the land and the style of farming. 

Our Trusted Team


Matthew Rice


P: 027 292 6218


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Matthew has spent over 15 years in the dairy industry in and around the environmental effluent and irrigation space.


He is passionate about the industry and the environment. This stems from 1st hand practical experience working on dairy farms from a young age and his love of the outdoors.   


Matthew enjoys working directly with and helping farmers find the best solution for their specific operations and contributing to the overall sustainability of the industry. 


In his free time, he loves hunting, fishing & is a real foodie.  He is a family man, becoming a new dad in 2019. 

What our clients have to say. 


“We wanted an Effluent Design company that would take care of our project management from start to finish.


E&I did the design, project management, and installation of our new effluent system.”


Gary and Sue Blackler, Farm Owners, Te Awamutu

Our Working Relationships


We work in close contact with Environment Waikato to often discuss cases and get their input to ensure outcomes are reached.



DairyNZ have invited us to discuss nutrient management at Field Days
on their behalf.  We have also worked with DairyNZ to write effluent
systems manuals.


Fonterra often refer us to farmers who have effluent problems.  We talk on their behalf during Field Days.


We are an enterprise you can trust with industry design accreditation. 







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