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Best Licensed Septic Contractors in Napa, CA

4 septic companies registered in Napa hold current CSLB licenses, verified against official records as of August 17, 2026. All 4 are listed below, ordered by workers' compensation cover and years licensed.

How we chose: We identified 4 companies registered in Napa. 4 passed license verification. All 4 are listed below. Our methodology

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  1. 1.Napa Septic Tank Service Inc.

    ✓ CSLB License #254028 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1968
    Phone
    (707) 224-1748

  2. 2.P & R Septic Systems LLC

    ✓ CSLB License #482218 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1985
    Phone
    (707) 252-6866

  3. 3.Silverado Plumbing Inc. DBA Mr Rooter Plumbing

    ✓ CSLB License #511333 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1987
    Phone
    (707) 252-6578

  4. 4.Rong's Backhoe Service

    ✓ CSLB License #629852 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1991
    Phone
    (707) 226-9412

Compare the top 4 at a glance

CompanyLicenseWorkers' compLicensed since
Napa Septic Tank Service Inc.#254028On file1968
P & R Septic Systems LLC#482218On file1985
Silverado Plumbing Inc. DBA Mr Rooter Plumbing#511333On file1987
Rong's Backhoe Service#629852Exempt or none on file1991

Napa County septic licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 6 active C-42 sanitation system licenses in Napa County, 4 of them registered in Napa. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Napa license has been held 39 years, and the longest-standing one dates to 1968. 3 of Napa's 4 licenses (75.0%) 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: 6 of the county's 6 licenses carry the same $25,000 bond California sets by statute. 0 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 Napa: common questions

How many licensed septic contractors are there in Napa?

4 active C-42 sanitation system licenses are registered in Napa, out of 6 across Napa County. 4 Napa-registered companies passed our license verification, and all 4 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. 4 active C-42 sanitation system licenses are registered in Napa and 6 across Napa County, the longest-standing issued in 1968. 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 3 of Napa's 4 currently carry. 0 Napa County licenses expire within 90 days.

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