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Melville Water Treatment Plant


MELVILLE, Saskatchewan




B.C. Water Sustainability Act

Since its founding in 1908, the City of Melville endured challenges providing reliable, quality drinking water for residents. The City’s surface water supply was proving challenging to treat and prone to droughts, requiring the City to add a supplemental groundwater supply. In 1989, the City implemented Canada’s first electrodialysis reversal (EDR) process to treat its highly mineralized groundwater supply.

In 2016, with this equipment near the end of its service life, SaskWater – the plant’s owner/operator – contracted Associated Engineering to design and oversee construction of a new water treatment plant using only groundwater. The new plant employs RO (reverse osmosis), which is comparatively, a more effective and widely adopted demineralization technology than EDR. The Associated design team tailored pre-treatment and post-treatment processes around the RO system to extend RO service life, thus decreasing overall operating costs, enhancing water quality, and safety for residents and preserving downstream infrastructure.

Associated Engineering’s design allowed construction and commissioning to proceed without unplanned water supply service disruptions while fully integrating existing non-plant infrastructure where possible. Initially located adjacent to the old facility, the new plant design facilitated raw water and treated water piping interconnections, including a challenging connection into the existing gunite reservoir. The new process incorporates wastewater retention and release, reducing environmental impact and greenhouse gas emissions from the former deep well injection system. Delivered on time and under budget, the water treatment plant provides Melville residents with affordable, high quality, sustainable, and reliable drinking water that supports growth, economic development, and quality of life.

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Reverse Osmosis




Association of Consulting Engineering Companies SK, PINNACLE Award & Award of Excellence

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Project Highlights

Class III

plant classification


cubic metre reservoir


groundwater supply wells


water supply pipeline


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A career step in the right direction

We are recognized as one of Canada’s Best Managed Companies for 14 consecutive years but our achievements and reputation are only possible because of our amazing staff. We believe that a supported staff allows them to excel at what they do best, and provide the best possible service to our clients and communities.