
San Rafael Water Treatment Services
Professional Water Quality Improvements for Properties in the Marin and Sonoma Counties
Marin H2O has been improving water quality for homes and businesses throughout San Rafael, Marin County, and Sonoma County since 1961, combining decades of experience with partnerships from trusted brands like Culligan to deliver water treatment solutions that address every property's unique needs. Our team handles everything from simple drinking water improvements to complex whole-house systems, with the technical expertise and equipment necessary to tackle projects that other companies cannot manage. As part of a larger network of comprehensive service providers, we can address water quality concerns alongside plumbing, construction, and mechanical systems for integrated solutions that work seamlessly together.
Our fully licensed and insured technicians begin every project with a thorough water analysis that identifies specific contaminants, mineral levels, and quality issues affecting your property. This diagnostic approach allows us to recommend targeted treatment methods that address actual problems rather than applying generic solutions. With our one-year labor warranty and commitment to transparency, you can trust that your water treatment investment will deliver measurable improvements in both water quality and system performance.
Ready to improve your water quality? Call Marin H2O at (415) 877-9745 or contact us online to request a free water analysis and service estimate!
The Marin H2O Difference
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Local, Trusted & LicensedProudly serving our community with fully licensed, dependable experts you can trust.
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Offering 100% Free QuotesTransparent, no-obligation quotes to help you make informed decisions—always free.
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Top-Notch Customer ServiceWe prioritize your satisfaction with friendly, professional support every step of the way.
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Backed By a WarrantyQuality work guaranteed with reliable warranties for your peace of mind.

How Water Quality Affects Your Health and Your Plumbing
Poor water quality creates problems that extend far beyond taste and odor concerns, directly impacting both your family's health and your property's plumbing infrastructure. Contaminants like bacteria, heavy metals, and chemical pollutants can cause serious health issues when consumed regularly, while excessive chlorine and other treatment chemicals may contribute to skin irritation and respiratory problems. Hard water minerals, sediment, and corrosive elements also accelerate wear on plumbing fixtures, appliances, and water heaters, leading to premature failures and costly replacements.
Untreated water quality issues compound over time, creating mineral buildup in pipes that restricts flow and reduces system efficiency. Corrosive water conditions can damage copper pipes and fixtures, while high mineral content leaves unsightly stains on sinks, toilets, and shower surfaces that require constant cleaning. Professional water treatment addresses these concerns at their source, protecting both your health and your property's plumbing investment.
Don't let water quality problems affect your health or damage your plumbing system. Call Marin H2O’s San Rafael water treatment team at (415) 877-9745 to request a same-day service appointment!

Highly Professional & Trustworthy
“It's a real pleasure to work with a group of people who are highly professional, know what they are doing, and are trustworthy and dependable. I couldn't have asked for a better outcome and experience.”Benhur M.