S E W A G E    D I S P O S A L

Septic systems are used for underground wastewater on-site wastewater disposal for structures that do not have access to public sewer. They treat wastewater from plumbing produced by bathrooms, kitchen drains and laundry. 

Please refer to the following information to find out what is needed to install a new septic system and what to do if you already have one.



A P P L Y I N G    F O R   A    N E W    S E P T I C    S Y S T E M

Before applying for a new septic system, it is necessary to have a valid soils testing (On Site Soils Evaluation - OSSE) done. Please refer to the below tabs for more information on how to apply.

  1. OSSE
  2. Septic Permit
  3. Setbacks, Designs & Ordinance
  4. Standard System Designs 

An OSSE includes soil tests that determine the effectiveness of soil to filter sewage through leach lines, as well as observations of required setbacks, constraints and possibilities for an individual, “on-site” septic system. The report produced by the consultant of the particular site tested on a parcel is reviewed and evaluated by an Environmental Health Specialist who generates a findings report. 

An OSSE must be conducted by a Nevada County approved Soil Testing Consultant. Reports are valid if completed after 1998, with a possibility of extending back to 1991 pending Consultant re-certification. (link from zander for validity of reports)

It is recommended to have the consultant apply for the OSSE permit, as well as schedule insections to conduct the OSSE. This can be done by calling the number below under OSSE Scheduling. Once the permit is issued and you have completed your final inspection, you can proceed to apply for a Septic Permit Application. 


  1. Hire a Nevada County Approved Soils Testing Consultant
  2. Apply Online (Note: You will need  your Consultants contact information to apply online)
  3. Consultant schedules an OSSE (see below)
  4. Consultant and Nevada County Specialist meet on site for soils testing
  5. Consultant submits Soils Evaluation Report to Nevada County
  6. Nevada County Specialist generates Findings Report to approve what type of septic system to install
  7. You may then proceed to apply for a Septic Permit (see above tab)

Scheduling an OSSE

Updated: April 23, 2018

We are now scheduling OSSE's for the week of May 7th - 11th

Please Note: The County will try to accommodate requested dates but cannot guarantee availability.  

To schedule an OSSE, please call (530)265-1599.


E X I S T I N G    S E P T I C    S Y S T E M

  1. Septic Repair / Failure
  2. Locating Your Septic System
  3. Additions
  4. Septic System Monitoring

If you have an existing septic system that is failing or needs to be repaired, please contact a Licensed Professional for a site visit.  The Licensed Professional will determine the issue and will be able to advise you on the next step of the submittal process for septic repairs or new replacements.


OSSE Application 
Includes Application Fee, Review and Approval
Standard Septic System Permit - Gravity Flow $622.29
Non-Standard Septic System Permit
Pressure Dose, Pumped, Deep Trench, Curtain Drain, Engineered, Hi-Line, Capped
Non-Standard Septic System Permit with M & M
Sand Filter, Geoflow, Drip, Mound, Advantax, Hoot, ELGEN
Maintenance and Monitoring Annual Permit 

Septic System Modification $534.22
Septic Tank Replacement Only $358.08
Septic Repair Permit $358.08
Septic Abandonment $181.94
Septic Variance Request $352.28