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County Of Sonoma › Health and Human Services › Health Services › Divisions › Public Health › Environmental Health › Programs and Services › LOP
Environmental Health

Leaking Underground Storage Tank - Local Oversight

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Leaking Underground Storage Tank- Local Oversight Program (LOP)

As of July 1, 2021, the Sonoma County Local Oversight Program (LOP) has ended. All remaining open LOP sites have been transferred to the appropriate Regional Water Board for continued oversight. 

All former LOP site information can be found on the State database Geotracker.

Please see the Environmental Drilling page for instructions on how to obtain drilling permits for all environmental drilling including former LOP sites.