How many water conditioning contractors are licensed in California?

California has 313 contractors with a C55 (Water Conditioning) license from the Contractors State License Board. 301 (96%) hold active licenses. SiteVetter checks each against SAM.gov, OSHA, DOL, and EPA databases.

What does a C55 license cover in California?

A California C55 license covers water conditioning contractors for water treatment systems. Any contractor performing water conditioning work valued at $500 or more must hold this license. The CSLB issues and regulates all contractor licenses in the state.

What percentage of water conditioning contractors have federal violations?

2.2% of California water conditioning contractors (7 out of 313) have at least one record in federal databases. These include SAM.gov debarments, DOL wage violations, OSHA safety citations, and EPA environmental violations.

Verify Water Conditioning Contractors (C55) - Page 6 | CSLB + Federal Check

How to Verify a Water Conditioning Contractor (C55) in California

California requires all contractors performing water conditioning work valued at $500+ to hold a valid CSLB C55 license. Of the 313 licensed water conditioning contractors in the state, 96% currently hold active licenses and 2.2% have at least one federal compliance record.

Manual vetting takes 45+ minutes per contractor and routinely misses violations in databases most people don't know to check. SiteVetter runs CSLB status, SAM.gov debarment, DOL wage violations, OSHA safety citations, and EPA environmental records in seconds—creating a timestamped compliance artifact.

Verification Checklist for Water Conditioning Contractors

Verify the contractor license is active and in good standing
Request proof of insurance and bonding
Get at least 3 written quotes before selecting a contractor
Check federal databases: SAM.gov, OSHA, DOL, and EPA records
Confirm bond: California requires $25,000+ contractor bond (SB 607)

Why Verification Matters for Water Conditioning Work

Under California's "Controlling Employer" doctrine, general contractors face liability for subcontractor safety violations. For water conditioning work specifically, 2.2% of licensed contractors have federal records that a standard CSLB license check wouldn't reveal. SiteVetter's 5-database check catches what a single-source verification misses.

Water Conditioning Contractor Verification - Page 6

About C55 License

Water Conditioning Contractors

How to Verify a Water Conditioning Contractor (C55) in California

Verification Checklist for Water Conditioning Contractors

Why Verification Matters for Water Conditioning Work