How many sanitation system contractors are licensed in California?

California has 992 contractors with a C42 (Sanitation System) license from the Contractors State License Board. 959 (97%) hold active licenses. SiteVetter checks each against SAM.gov, OSHA, DOL, and EPA databases.

What does a C42 license cover in California?

A California C42 license covers sanitation system contractors for septic and sewage systems. Any contractor performing sanitation system work valued at $500 or more must hold this license. The CSLB issues and regulates all contractor licenses in the state.

What percentage of sanitation system contractors have federal violations?

8.1% of California sanitation system contractors (80 out of 992) have at least one record in federal databases. These include SAM.gov debarments, DOL wage violations, OSHA safety citations, and EPA environmental violations.

Verify Sanitation System Contractors (C42) - Page 6 | CSLB + Federal Check

How to Verify a Sanitation System Contractor (C42) in California

California requires all contractors performing sanitation system work valued at $500+ to hold a valid CSLB C42 license. Of the 992 licensed sanitation system contractors in the state, 97% currently hold active licenses and 8.1% 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 Sanitation System 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 Sanitation System Work

Under California's "Controlling Employer" doctrine, general contractors face liability for subcontractor safety violations. For sanitation system work specifically, 8.1% 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.

Sanitation System Contractor Verification - Page 6

About C42 License

Sanitation System Contractors

How to Verify a Sanitation System Contractor (C42) in California

Verification Checklist for Sanitation System Contractors

Why Verification Matters for Sanitation System Work