Quick answer
There are 36 water treatment companies listed in Sonoma County, averaging 2.4★ across 214 verified reviews. True Water (4.9★, 29 reviews) currently ranks #1 by review rating, volume, and proximity.
Looking for the best water treatment companies in Sonoma County? FindInMyZip ranks every water treatment in the county by the same transparent formula — review rating (40%), review volume (30%), proximity (20%), and category fit (10%). Here's what the data shows across 18 cities.
Top-rated water treatment companies in Sonoma County
- True Water — 4.9★ across 29 reviews.
- Pure Water Guys — 5.0★ across 23 reviews.
- Luciani Pump Co. Inc. — 4.8★ across 21 reviews.
- Weeks Drilling & Pump Co. — 4.3★ across 43 reviews.
- Stevenson Water Treatment & Distribution Inc — 5.0★ across 12 reviews.
Rankings update automatically as new reviews come in — see the live, always-current list on the Sonoma County directory page.
How many water treatment companies serve Sonoma County?
FindInMyZip currently tracks 36 water treatment companies across Sonoma County, holding an average rating of 2.4★ on 214 combined reviews. Get water testing, a filtration or softening system, or well-water treatment from the highest-rated local pros in your zip.
Water Treatment Companies by city in Sonoma County
- Water Treatment Companies in Santa Rosa
- Water Treatment Companies in Petaluma
- Water Treatment Companies in Rohnert Park
- Water Treatment Companies in Windsor
- Water Treatment Companies in Healdsburg
- Water Treatment Companies in Cotati
- Water Treatment Companies in Sonoma
- Water Treatment Companies in Sebastopol
What to look for when hiring a water treatment in Sonoma County
Prioritize licensing and insurance, a track record of recent reviews (not just a high average), and proximity to your ZIP for faster response. When you're ready, get water treatment quotes from any listing.
Top-rated water treatment companies in Sonoma County
Live ranking — updates automatically as reviews change.
True Water
True Water is a water treatment business serving Stewarts Point, CA and the surrounding area.
1839 Ygnacio Valley Rd, Walnut Creek, CA 94598, USA
Pure Water Guys
Pure Water Guys is a water treatment business serving Santa Rosa, CA and the surrounding area.
3441 Spring Creek Dr, Santa Rosa, CA 95405, USA
Luciani Pump Co. Inc.
Luciani Pump Co. Inc. is a water treatment business serving Healdsburg, CA and the surrounding area.
30 Mill St, Healdsburg, CA 95448, USA
Weeks Drilling & Pump Co.
Weeks Drilling & Pump Co. is a water treatment business serving Sebastopol, CA and the surrounding area.
6100 CA-12, Sebastopol, CA 95472, USA
Stevenson Water Treatment & Distribution Inc is a water treatment business serving Kenwood, CA and the surrounding area.
21705 Dry Creek Cutoff, Middletown, CA 95461, USA
Frequently asked questions
Who are the best-rated water treatment companies in Sonoma County? +
There are 36 water treatment companies listed in Sonoma County, averaging 2.4★ across 214 verified reviews. True Water (4.9★, 29 reviews) currently ranks #1 by review rating, volume, and proximity.
How does FindInMyZip rank water treatment companies? +
Listings are scored on review rating (40%), review volume (30%), proximity to your ZIP (20%), and category fit (10%). Ratings are Bayesian-smoothed so a few five-star reviews don't outrank an established business unfairly.
How many water treatment companies are in Sonoma County? +
36 water treatment companies are currently listed across Sonoma County, averaging 2.4★ on 214 reviews.