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Well & Septic Handouts/Forms/Applications

There are some duplicate CNI (Construction Inspection) and BPC (Building Plan Check) handouts due to building code changes that became effective January 1, 2008. The version including an x in the title of the form is to be used only for construction projects that were submitted prior to January 1, 2008. For example: Special Inspection and Testing Procedure, CNI-010x (Pre Jan 1 2008 Projects). For all projects submitted on or after January 1, 2008, refer to the form without an x in the title.

Some of these documents are saved in Portable Document Format (PDF). We recommend you download Adobe® Reader®, a free software that allows you view and print PDF files.

For accessibility assistance with these documents, please contact the Sonoma County Permit and Resource Management Department (PRMD) at (707) 565-1900.


Please note: Although PRMD is continuously working to maintain these documents, some may not reflect the requirements of the currently adopted, triennial code cycle. Please make use of the revision date in the footer of the document as a guide to identifying the currency of a particular document.





Disinfecting Wells

NPD-007 Dry Season Best Management Practices for Construction Sites


Guidelines for Maintaining a Nonstandard Pressure Distribution Septic System

WLS-014 How to Monitor A Non-Standard Septic System


Landscape Guidelines for Nonstandard Septic Systems


Maintenance Guidelines for Toilets on Nonstandard Sewage Disposal Systems


Minimum Standard Site Plan


Non-Standard Septic System Reduced Annual Operational Permit Fee


Preliminary Storm Water Mitigation Plan Worksheet


Procedure for Purging and Adjusting a Pressure Distribution Septic System


Protection of Stormwater Quality on Construction Sites


Percolation Test Not Approved


Refund Request


Septic System Application Requirements


Percolation Test Approved


Septic Tank Destruction Permits


Standard Urban Storm Water Mitigation Plan Questionnaire


State Water Resources Control Board General Permit Requirements


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Although every effort is made to provide complete and accurate information on this website, users are advised to contact appropriate PRMD staff before making project decisions. This may involve contacting more than one section within PRMD (e.g. Building, Plan Check, Zoning, Well & Septic, etc.), since each section implements specific codes or ordinances which may affect your project.
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Permit and Resource Management Department County of Sonoma