Licensed Septic Companies in Petaluma, CA
6 septic companies serve Petaluma, California, and 5 of them hold a California septic license or certification matched to the California Contractors State License Board list (data as of October 2026).
Septic services in Petaluma
Guides: Septic tank pumping · Septic system installation · Septic inspection · Installation cost · Pumping cost
6 septic companies in Petaluma
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Keller Charles Construction Inc
1350 Industrial Avenue Suite C, Petaluma, CA 94952 · Sonoma County
- Licensed: California Licensed Contractor (B, C12, C34, C42) · #885844 (California Contractors State License Board, verify)
Per state license: Installation
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Masterson Bryan Enterprises
1364 N Mcdowell Blvd #12, Petaluma, CA 94954 · Sonoma County
- Licensed: California Licensed Contractor (A, B, C-4, C16, C20, C34, C36, C42) · #271933 (California Contractors State License Board, verify)
Per state license: Installation
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Ongaro & Sons
719 Southpoint Blvd, Petaluma, CA 94954 · Sonoma County
- Licensed: California Licensed Contractor (C-4, C10, C16, C20, C34, C36, C39, C42, C43, C60, D21) · #215233 (California Contractors State License Board, verify)
From their website: Inspection · Perc testing Per state license: Installation
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Paul Michael Company Inc
1200 Casa Grande Rd, Petaluma, CA 94954 · Sonoma County
- Licensed: California Licensed Contractor (A, C12, C34, C42) · #386001 (California Contractors State License Board, verify)
Per state license: Installation
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Redwood Septic Services
717 North Mcdowell Blvdspc 102, Petaluma, CA 94954 · Sonoma County
- Licensed: California Licensed Contractor (C42) · #1158226 (California Contractors State License Board, verify)
Per state license: Installation
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Environmental Pump Services
Petaluma, CA 94952, Petaluma, CA 94952 · Sonoma County
From their website: Pumping · Grease traps
No listings match those filters.
Septic licensing in California
California has no license named for septic work; septic systems fall under the C-42 Sanitation System classification. Counties issue system permits. The Contractors State License Board (CSLB) issues these credentials: C-42 Sanitation System contractor license.
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Petaluma and whether the permit fee is in their quote.
California septic licensing: agencies, license types and how to check a license →
Septic companies in Petaluma: common questions
How many licensed septic companies are in Petaluma, CA?
6 septic companies serve Petaluma, California, and 5 of them hold a California septic license or certification matched to the California Contractors State License Board list (data as of October 2026). Each license badge on this page names the agency and links to its lookup so you can confirm it.
Who licenses septic contractors in California?
California has no license named for septic work; septic systems fall under the C-42 Sanitation System classification. Counties issue system permits. The licensing body is the Contractors State License Board (CSLB).
Which companies pump septic tanks in Petaluma?
1 of the 6 listings in Petaluma offer septic tank pumping, either on their own website or under a state pumper license. Use the service filter above to show only those companies.
Which companies install septic systems in Petaluma?
5 listings in Petaluma install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their California license.
How do I check a septic contractor's license in California?
Use the Contractors State License Board (CSLB)'s lookup (https://www.cslb.ca.gov/onlineservices/checklicenseII/checklicense.aspx) and search the contractor's name or license number. Our guide to checking a septic license walks through it.