Land Use Investigations

The Land Use Program investigates reports of unsanitary conditions and nuisances on private or public property or as a result of a business operation.


Division of Environmental Health policy emphasizes voluntary compliance through education over enforcement. If voluntary compliance is not achieved in a reasonable period of time, violations will proceed to nuisance abatement and/or fines as allowed by law. The cost of enforcement will be borne by the person(s) responsible for the violation by direct billing or liens made on substandard property.

Investigation Requests

Requests for investigation and service include, but are not limited to:

  • Reports of onsite sewage disposal system failures
  • Requests for waterborne illness investigation
  • Sewage spill reports from community sewer systems


To obtain permit applications, please go to our or contact the Land Use Program Office Assistant at 707-445-6215 and applications will be mailed.

If you have questions, or would like to speak with the Field Inspector for your area of the county, you may reach staff on their direct lines. The best times to call before and after the inspectors are out in the field, are between 8:30-9:30 a.m. and after 4 p.m.

If you have a project requiring consultation, we recommend that you use the Predevelopment Conference service where you can meet with our staff in person for a minimal fee.