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Find the 30 Best Water Treatment Companies in Ontario, ON

Browse 30 water treatment businesses serving Ontario, ON, including Saint Catharines, Kitchener and Alexandria, for residential and commercial projects. Review filtration, purification and system maintenance services, read customer feedback and contact local providers for quotes.
Alexandria (1)
Aurora (1)
Barrie (1)
Brantford (1)
Burlington (1)
Cambridge (1)
Campbellford (1)
Dorchester (1)
Etobicoke (1)
Huntsville (1)
Ingersoll (1)
Kingston (1)
Kitchener (2)
Mallorytown (1)
Midland (1)
Mississauga (1)
Nepean (1)
North Bay (1)
North York (1)
Oshawa (1)
Pelham (1)
Russell (1)
Saint Catharines (3)
Saint Thomas (1)
Waterford (1)
Welland (1)
Woodbridge (1)
6 reviews
Water Bar
10 Years
6 reviews
We offer free water testing with personalized treatment recommendations.
Discover premium water purification systems, reverse osmosis installations, and water testing services in Brantford, Ontario. Water Bar offers eco-friendly solutions for residential and commercial needs.
Water Softeners Reverse Osmosis Systems UV Disinfection Systems
(519) 759-8333 Call Profile
5 reviews
Ontario Soft Water
36 Years
5 reviews
We have 35 years of experience in water treatment solutions
Trusted provider of water softeners, reverse osmosis systems, and water treatment services in Kitchener-Waterloo since 1990. Free installation available on high-efficiency systems.
Water Softeners Reverse Osmosis Systems Tankless Water Heaters
(519) 579-0500 Call Profile
5 reviews
Aqua Service Niagara
Emergency
5 reviews
We offer first-class installations with long-term service accessibility.
Trusted water treatment solutions in St. Catharines. Aqua Service Niagara offers reverse osmosis systems, water softeners, and commercial purification services with first-class installations and 24/7 support.
Reverse Osmosis Systems Water Softeners Commercial Purification
(905) 646-6823 Call Profile
4 reviews
Young's Water /Kinetico
50+ Years
4 reviews
We offer 70+ years of combined experience in water treatment solutions.
Trusted water treatment solutions since 1950. Offering testing, filtration, and customized systems for residential and commercial needs in Southern Ontario.
Water Testing Filtration Systems UV Treatment
(905) 892-5701 Call Profile
4 reviews
Muskoka Clean Water
4 reviews
We offer free water testing to accurately diagnose your specific water quality issues.
Trusted water treatment specialists in Huntsville, ON. Muskoka Clean Water offers testing, filtration, and purification services for residential and commercial properties. Serving Muskoka, Almaguin Highlands, and East Parry Sound with customized solutions
Water Testing Filtration Systems Reverse Osmosis
(705) 349-2837 Call Profile
3 reviews
Neotec Water Treatment
33 Years
3 reviews
We have over 30 years of experience in water treatment solutions.
Neotec Water Treatment offers reliable water treatment systems and services in King City, including water softeners, reverse osmosis, and UV sterilizers for residential and commercial needs.
Water Softeners Reverse Osmosis UV Sterilizers
(905) 841-9507 Call Profile
2 reviews
Hills & Valley Water
2 reviews
We offer industry-leading expertise in water treatment solutions.
Trusted provider of residential and commercial water treatment solutions in Ottawa, offering advanced filtration, softening, and purification systems for clean, safe water.
Water Softeners Reverse Osmosis Systems UV Sterilization Systems
(613) 979-7873 Call Profile
1 review
AJ's Water Treatment
27 Years
1 review
We have over 25 years of experience in water treatment system design and installation.
AJ's Water Treatment offers professional water purification, softening, and filtration systems in Jacksonville, FL. Serving homes and businesses with customized solutions since 1999.
Drinking Water Systems Water Softening Specialty Filters
(613) 342-7276 Call Profile
4 reviews
Desforges Water Treatment
28 Years
4 reviews
We have 25 years of experience in residential and commercial water treatment.
Desforges Water Treatment offers water analysis, softeners, and purification systems in Ottawa. Serving Eastern Ontario for 25 years with Ecowater and Durastill products. Free in-home analysis available.
Water Softeners Filters Ultraviolet Lights
(613) 524-2177 Call Profile
6 reviews
Culligan Water Conditioning
6 reviews
We have served Central Ontario since 1949 with local expertise.
Trust Culligan Water Conditioning for expert water treatment, filtration, and softeners in Central Ontario since 1949. Free testing & trusted service.
Water Filtration Reverse Osmosis Water Softeners
(888) 798-4750 Call Profile