Licensed Septic Companies in Ontario, CA
8 septic companies serve Ontario, California, and 8 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 Ontario
Guides: Septic tank pumping · Septic system installation · Septic repair · Aerobic septic systems · Installation cost · Pumping cost
8 septic companies in Ontario
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Aranda'S Sanitation Systems
847 West Vesta Street, Ontario, CA 91762 · San Bernardino County
- Licensed: California Licensed Contractor (C42) · #1053122 (California Contractors State License Board, verify)
Per state license: Installation
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C P Construction Co Inc
P O Box 1206, Ontario, CA 91762 · San Bernardino County
- Licensed: California Licensed Contractor (A, C12, C34, C42) · #304795 (California Contractors State License Board, verify)
- Licensed: California Licensed Contractor (A, C34) · #862027 (California Contractors State License Board, verify)
Per state license: Installation
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H Septic
604 South San Antonio Ave, Ontario, CA 91762 · San Bernardino County
- Licensed: California Licensed Contractor (C42) · #1149300 (California Contractors State License Board, verify)
Per state license: Installation
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High speed rooter & plumbing
10709 Vernon Ave, Ontario, CA 91762 · San Bernardino County
- Licensed: California Licensed Contractor (A, C10, C20, C36, C42) · #1017796 (California Contractors State License Board, verify)
From their website: Pumping · Installation · Repair
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Pro Tech Plumbing
1119 W 5Th Street, Ontario, CA 91762 · San Bernardino County
- Licensed: California Licensed Contractor (C36, C42) · #915091 (California Contractors State License Board, verify)
From their website: Pumping · Aerobic systems · Grease traps Per state license: Installation
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Rodriguez Brothers Engineering Inc
2023 S Bon View Avenue, Ontario, CA 91761 · San Bernardino County
- Licensed: California Licensed Contractor (A, C42) · #670969 (California Contractors State License Board, verify)
Per state license: Installation
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Senor Septic Construction And Pumping Inc
604 S San Antonio Avenue, Ontario, CA 91762 · San Bernardino County
- Licensed: California Licensed Contractor (C42) · #1048170 (California Contractors State License Board, verify)
- Licensed: California Licensed Contractor (C42) · #888517 (California Contractors State License Board, verify)
Per state license: Installation
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Urgent Septic Solutions LLC
941 W I Street, Ontario, CA 91762 · San Bernardino County
- Licensed: California Licensed Contractor (C42) · #1121506 (California Contractors State License Board, verify)
Per state license: Installation
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 Ontario and whether the permit fee is in their quote.
California septic licensing: agencies, license types and how to check a license →
Septic companies in Ontario: common questions
How many licensed septic companies are in Ontario, CA?
8 septic companies serve Ontario, California, and 8 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 Ontario?
2 of the 8 listings in Ontario 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 Ontario?
8 listings in Ontario 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.