Local Septic Consultants & CSSP's

Soil Consultants and Septic Designers

A qualified professional is necessary when conducting an On-Site Sewage Disposal (OSSE) to evaluate a property's ability to dispose of sewage. This person will work with you and the Department to assist you in making important decisions affecting your parcel. The consultant is the person that performs your percolation tests examines your soil test pit(s), and prepares the OSSE report. 

Business NamePhone NumberEmail
Areas Served
Chalpin Environmental Inc., Susan Chalpin(530) 277-3914sgchalpin@saber.netAll Nevada County
Cranmer Engineering Inc.(530) 273-7284lab@cranmerengineeringinc.comAll Nevada County
Dave Slaughter(530) 277-2805ncamyndave@gmail.comEast County
Dennis Dodds(530) 582-1389ddarec@sbcglobal.netEast County
Dundas Geomatics, Inc.(530) 274-1616reception@ddgeo.comWest County
Lincoln & Long Engineering(530) 273-0503kathyreal@lincolnandlong.comAll Nevada County
Lindbloom Septic Desig, Inc., Marc LindbloomW: (530) 888-7464
C: (530) 613-5305
All Nevada County
Navo & Sons Inc.(530) 273-2964navo@navo.comWest County
NexGen Engineering and Consulting LLC(866) 269-0999ian@nexgeneng.comAll Nevada County
Westex Consulting Engineers
All Nevada County

Disclaimer: Nevada County is not able to provide recommendations for qualified professionals. This is not a complete list of every qualified professional in the area. Nevada County is not responsible for updating the contact information on this list; therefore, the information listed might be out of date. The intent of this list is solely to help our community members find a professional to perform soil testing and onsite wastewater treatment system (OWTS) design in Nevada County. You may hire any qualified professional in the State of California. Section L-VI 1.2 of the Nevada County Local Area Management Plan (LAMP) defines a qualified professional as a: Certified Engineering Geologist, Certified Professional Soil Scientist, Registered Civil Engineer, or Registered Environmental Health Specialist. If you would like to be added to this list, please submit your request in writing including preferred contact information and licenses and/or current registrations to Nevada County Department of Environmental Health, Attn: Land Use Program, PO Box 599002, 950 Maidu Ave, Nevada City, CA 95959 or by sending an email to Env.Health@co.nevada.ca.us.

Certified System Service Providers (CSSP)

Property owners with non-standard or treatment-type septic systems which were permitted on or after July 1, 1998, are required to perform annual maintenance and monitoring (M & M) of their systems. Also, property owners are required to record their M & M and the Right of Entry Agreement with the Department of Environmental Health. 

As a property owner, you need to select a qualified Certified System Service Provider (CSSP). Only a Certified System Service Provider (CSSP) may provide M & M services. A CSSP is a person or organization having received training and been tested and “certified” for specific systems. CSSPs may only conduct service on systems for which they are qualified or trained to maintain. (Reference: Nevada County LAMP, Effective 6/7/2018; Ordinance No. 2448)

NCDEH requires CSSPs to provide current evidence of education, training, certifications, and/or licenses and to pay the annual Board-approved registration fee. (The following list of CSSP was updated on 03/26/2021.) 

Permit #
Business NamePhoneCSLB TypeEmailSystems ServicedSpecialized Training/
Areas Served


Navo & Sons (530)
C-36 Plumbing
C-42 Sanitation
navo@navo.comPressure Dose;
Advantex/Orenco; Eljen; Hoot; Ecoflo and Ecoflo annual maintenance and filtering media replacement; Geoflow; Presby/Infiltrator; Singulair; sandfilter; Envirocycle, Hydroaction
NAWT #9699IC; NOWRA; Advantex; PresbyAll Nevada County
PR0002852Advanced Septic Maintenance - Robert Rasch(530) 913-9423Class A General Engasm@nccn.netPressure Dose
All Nevada County
PR0002888Sierra Precasting /
Sierra Septic Service & Supply
(530) 885-3472Class A - General Eng
C-42 Sanitation
C-36 Plumbing
osierraprecast@aol.comPressure Dose;
Advantex/Orenco; Ecoflow; Geoflow; Presby/Infiltrator; Singulair; sandfilter; Eljen
COWA; NAWT; Advantex; PresbyWest County
PR0009824Superior On-Site Solutions(877)669-4668Class B Buildingrl.mccauley@sosonsiteca.net
Hoot; GeoflowCOWA; NAWTAll Nevada County
PR0002840Urke Septic Services - Doug Urke(530) 274-3902Class A - General Engoffice@urkeseptic.comPressure Dose; Advantex; Ecoflo; GeoflowNAWTWest County
PR0009779Mr. Rooter(916)910-8063C-36 Plumbingmrrooternc@hotmail.com 

PR0009252JAM Septic - James Marich(530) 432-8680C-36 Plumbing
C-42 Sanitation
jamsepticservices@gmail.comAdvantex/Orenco, Hoot, Geoflow, EcoFlow, Eljen, Presby

COWA; NAWT; Orenco;
Contractors State Lic Board C36 C42

West County
PR0009414Jeremey Navo(530) 557-5036C-42 Sanitationjeremeynavoseptic@yahoo.com
Advantex/Orenco, Hoot, Geoflow, Eljen, Presby/Infiltrator
West County

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