HVAC Service Fast
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Water Treatment in California

260 local Water Treatment pros serving 61 cities across California. Looking for water treatment in California? HVAC Service Fast lists 260 local Water Treatment companies serving 61 cities — from Oakland and Bakersfield to Anaheim. Compare Google ratings, check license details and contact companies directly — no middleman, no fees. California sees both hot summers (~80°F) and cold winters (~50°F), so equipment works year-round with little downtime. Typical jobs… Read more

Compare Water Treatment Companies in California

Local contractors · pick a city to narrow down

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Rayne Of Bakersfield logo

Rayne Of Bakersfield

422 E 18th St, Bakersfield, CA 93305, USA

Water Treatment
3.7 (14) · via Google

Website

Isopure Water logo

Isopure Water

515 Fairview St, Santa Ana, CA 92703, USA

Water Treatment
3.6 (30) · via Google

Website

Water Quality Control Board

Elihu M. Harris State Office Building, 1515 Clay St #1400, Oakland, CA 94612, USA

Water Treatment
3.5 (6) · via Google

Website

About Water Treatment in California

Looking for water treatment in California? HVAC Service Fast lists 260 local Water Treatment companies serving 61 cities — from Oakland and Bakersfield to Anaheim. Compare Google ratings, check license details and contact companies directly — no middleman, no fees.

California sees both hot summers (~80°F) and cold winters (~50°F), so equipment works year-round with little downtime. Typical jobs include water treatment, water softener installation, whole-house water filtration and seasonal maintenance.

Contractor licensing in California runs through the California Contractors State License Board (CSLB). Where a company lists a license number on its profile, you can verify it yourself on the official portal before you hire — a two-minute check that filters out most bad actors.

Water Treatment in California — FAQ

How many Water Treatment companies are listed in California?
HVAC Service Fast currently lists 260 Water Treatment companies across 61 cities in California. Every profile shows the data we have on file — ratings from public sources, phone, address and, where available, license numbers.
How do I verify a Water Treatment contractor's license in California?
Use the official California Contractors State License Board (CSLB) search. If a company shows a license number on its HVAC Service Fast profile, look it up there to confirm it is current before signing a contract.
How much does Water Treatment cost in California?
Prices vary with job scope, equipment and local labor rates, so treat any flat number online with caution. Our free HVAC cost guide explains typical price factors, and requesting two or three quotes from the companies listed here is the fastest way to see real local pricing.
Which California cities have the most Water Treatment pros?
The largest concentrations are in Oakland, Bakersfield, Anaheim, San Francisco, Sacramento. Use the city filter to narrow this page, or open a city page for the full local list.

Water Treatment by City in California

Open a city page for the full local list of Water Treatment pros.