Certified Engineers

Looking for approved engineers for our septic systems? Scroll down and click on your county below to find your local approved engineers.

  • Alameda

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


    Cal State Engineering

    Contact Name: Jeff Morlan

    209-223-1441 Send Email Visit Website

    Counties Served: Alameda, Amador, Calaveras, Contra Costa, El Dorado, Sacramento, San Joaquin, Tuolumne.


  • Alpine

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Amador

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Cal State Engineering

    Contact Name: Jeff Morlan

    209-223-1441 Send Email Visit Website

    Counties Served: Alameda, Amador, Calaveras, Contra Costa, El Dorado, Sacramento, San Joaquin, Tuolumne.


  • Butte

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Calaveras

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Cal State Engineering

    Contact Name: Jeff Morlan

    209-223-1441 Send Email Visit Website

    Counties Served: Alameda, Amador, Calaveras, Contra Costa, El Dorado, Sacramento, San Joaquin, Tuolumne.


  • Colusa

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Contra Costa

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


    Cal State Engineering

    Contact Name: Jeff Morlan

    209-223-1441 Send Email Visit Website

    Counties Served: Alameda, Amador, Calaveras, Contra Costa, El Dorado, Sacramento, San Joaquin, Tuolumne.


  • Del Norte

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • El Dorado

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


    Lindbloom Septic Design

    Contact Name: Marc Lindbloom

    530-888-7464 Send Email Visit Website

    Counties Served: El Dorado, Napa, Nevada, Placer, Yolo, Yuba.


    Cal State Engineering

    Contact Name: Jeff Morlan

    209-223-1441 Send Email Visit Website

    Counties Served: Alameda, Amador, Calaveras, Contra Costa, El Dorado, Sacramento, San Joaquin, Tuolumne.


  • Glenn

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Humboldt

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Inyo
    No items found.
  • Kern

    Earth Strata Geotechnical Services

    Contact Name: Gadalla "GuGu"

    951-536-5081 Send Email Visit Website

    Counties Served: San Diego, Imperial, Riverside, Orange, Los Angeles, Ventura, Santa Barbara, San Luis Obispo, and Kern.


  • Lake

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Lassen

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Marin

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Mendocino

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Modoc

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    E & S Engineers and Surveyors Inc.

    Contact Name: Morgan Eastlick

    530-842-6813 Send Email Visit Website

    Counties Served: Siskiyou and Modoc.


  • Mono
    No items found.
  • Monterey

    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


  • Napa

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


    Lindbloom Septic Design

    Contact Name: Marc Lindbloom

    530-888-7464 Send Email Visit Website

    Counties Served: El Dorado, Napa, Nevada, Placer, Yolo, Yuba.


  • Nevada

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Lindbloom Septic Design

    Contact Name: Marc Lindbloom

    530-888-7464 Send Email Visit Website

    Counties Served: El Dorado, Napa, Nevada, Placer, Yolo, Yuba.


    Lincoln & Long Engineering

    Contact Name: Dave Lincoln & Dave Long

    530-273-0503 Send Email Visit Website

    Counties Served: Nevada, Placer, and Yuba.


  • Placer

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Lindbloom Septic Design

    Contact Name: Marc Lindbloom

    530-888-7464 Send Email Visit Website

    Counties Served: El Dorado, Napa, Nevada, Placer, Yolo, Yuba.


    Lincoln & Long Engineering

    Contact Name: Dave Lincoln & Dave Long

    530-273-0503 Send Email Visit Website

    Counties Served: Nevada, Placer, and Yuba.


  • Plumas

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Sacramento

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


    Cal State Engineering

    Contact Name: Jeff Morlan

    209-223-1441 Send Email Visit Website

    Counties Served: Alameda, Amador, Calaveras, Contra Costa, El Dorado, Sacramento, San Joaquin, Tuolumne.


  • San Joaquin

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Cal State Engineering

    Contact Name: Jeff Morlan

    209-223-1441 Send Email Visit Website

    Counties Served: Alameda, Amador, Calaveras, Contra Costa, El Dorado, Sacramento, San Joaquin, Tuolumne.


  • San Mateo

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


  • Santa Barbara

    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


    Earth Strata Geotechnical Services

    Contact Name: Gadalla "GuGu"

    951-536-5081 Send Email Visit Website

    Counties Served: San Diego, Imperial, Riverside, Orange, Los Angeles, Ventura, Santa Barbara, San Luis Obispo, and Kern.


  • Santa Clara

    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


  • Santa Cruz

    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


  • Shasta

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Bill Navarre

    Contact Name: Bill Nevarre

    530-859-2648 Send Email Visit Website

    Counties Served: Shasta and Siskiyou.


    Cramer Consulting

    Contact Name: Mark Cramer

    530-241-6377 Send Email Visit Website

    Counties Served: Shasta, Tehama, Trinity, and Siskiyou.


  • Sierra

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Siskiyou

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Bill Navarre

    Contact Name: Bill Nevarre

    530-859-2648 Send Email Visit Website

    Counties Served: Shasta and Siskiyou.


    E & S Engineers and Surveyors Inc.

    Contact Name: Morgan Eastlick

    530-842-6813 Send Email Visit Website

    Counties Served: Siskiyou and Modoc.


  • Solano

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


  • Sonoma

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


  • Sutter

    MHM Inc.

    Contact Name: John Mallen

    530-742-6485 Send Email Visit Website

    Counties Served: Sutter and Yuba.


    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


  • Tehama

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Cramer Consulting

    Contact Name: Mark Cramer

    530-241-6377 Send Email Visit Website

    Counties Served: Shasta, Tehama, Trinity, and Siskiyou.


  • Toulumne

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Cal State Engineering

    Contact Name: Jeff Morlan

    209-223-1441 Send Email Visit Website

    Counties Served: Alameda, Amador, Calaveras, Contra Costa, El Dorado, Sacramento, San Joaquin, Tuolumne.


  • Trinity

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Cramer Consulting

    Contact Name: Mark Cramer

    530-241-6377 Send Email Visit Website

    Counties Served: Shasta, Tehama, Trinity, and Siskiyou.


  • Ventura

    Earth Strata Geotechnical Services

    Contact Name: Gadalla "GuGu"

    951-536-5081 Send Email Visit Website

    Counties Served: San Diego, Imperial, Riverside, Orange, Los Angeles, Ventura, Santa Barbara, San Luis Obispo, and Kern.


  • Yolo

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


    Lindbloom Septic Design

    Contact Name: Marc Lindbloom

    530-888-7464 Send Email Visit Website

    Counties Served: El Dorado, Napa, Nevada, Placer, Yolo, Yuba.


  • Yuba

    W Gilbert Engineering

    Contact Name: Wesley E. Gilbert, P.E.

    530-809-1315 Send Email Visit Website

    Counties Served: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, San Mateo, Shasta, Sierra, Siskiyou, Solano, Sonoma, Sutter, Tehama, Tuolumne, Trinity, Yolo, Yuba.


    Les Miyashiro, R.E.H.S.

    Contact Name: Les Miyashiro

    707-718-2122 Send Email Visit Website

    Counties Served: Alameda, Contra Costa, El Dorado, Monterey, Napa, Sacramento, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Yolo, Yuba.


    Lindbloom Septic Design

    Contact Name: Marc Lindbloom

    530-888-7464 Send Email Visit Website

    Counties Served: El Dorado, Napa, Nevada, Placer, Yolo, Yuba.


    MHM Inc.

    Contact Name: John Mallen

    530-742-6485 Send Email Visit Website

    Counties Served: Sutter and Yuba.


    Lincoln & Long Engineering

    Contact Name: Dave Lincoln & Dave Long

    530-273-0503 Send Email Visit Website

    Counties Served: Nevada, Placer, and Yuba.


Interested in More Information on Our Septic Systems?

Reinstallation went perfectly with NexGen's assistance. I did exactly everything I propose to do and
in a totally professional manner. They have been easily accessible and readily available to assist in the
process of installation when needed.
Gene Graves, Granite Bay, CA