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Best Licensed Septic Contractors in Fontana, CA

3 septic companies registered in Fontana hold current CSLB licenses, verified against official records as of August 17, 2026. All 3 are listed below, ordered by workers' compensation cover and years licensed.

How we chose: We identified 3 companies registered in Fontana. 3 passed license verification. All 3 are listed below. Our methodology

We earn a fee when you call businesses through numbers on this site. This never affects who is listed or how they rank.

  1. 1.Robo One Plumbing Corporation

    ✓ CSLB License #639506 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1992
    Phone
    (909) 721-0085

  2. 2.All State Earth Moving Company

    ✓ CSLB License #1101475 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2023
    Phone
    (951) 377-2037

  3. 3.Bright Underground Workz

    ✓ CSLB License #1154710 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2026
    Phone
    (626) 704-9400

Compare the top 3 at a glance

CompanyLicenseWorkers' compLicensed since
Robo One Plumbing Corporation#639506On file1992
All State Earth Moving Company#1101475On file2023
Bright Underground Workz#1154710Exempt or none on file2026

San Bernardino County septic licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 73 active C-42 sanitation system licenses in San Bernardino County, 3 of them registered in Fontana. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Fontana license has been held 3 years, and the longest-standing one dates to 1992. 2 of Fontana's 3 licenses (66.7%) carry current workers' compensation cover in CSLB's file. That is employee injury cover, not liability insurance, and a blank usually means an owner-operator with no employees - lawful, and not a mark against anyone. The contractor bond is not a signal here: 73 of the county's 73 licenses carry the same $25,000 bond California sets by statute. 11 county licenses reach their expiration date within the next 90 days. CSLB cannot link straight to a license record, so every listing above shows its number for you to type into CSLB's license lookup. How we verify.

Septic Contractors in Fontana: common questions

How many licensed septic contractors are there in Fontana?

3 active C-42 sanitation system licenses are registered in Fontana, out of 73 across San Bernardino County. 3 Fontana-registered companies passed our license verification, and all 3 are listed on this page. Only licenses CSLB shows as CLEAR and unexpired are listed.

Does California license septic contractors?

Yes. California licenses contractors by classification, and C-42 is the CSLB classification that authorises this work. 3 active C-42 sanitation system licenses are registered in Fontana and 73 across San Bernardino County, the longest-standing issued in 1992. Only CLEAR, unexpired licenses appear here.

How do I check a septic contractor's license in California?

Every listing above shows its CSLB license number. CSLB cannot link straight to a record, so open its license lookup and type the number in: it shows status, expiration, the contractor bond and workers' compensation cover, which 2 of Fontana's 3 currently carry. 11 San Bernardino County licenses expire within 90 days.

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