County of Sonoma
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Well and Septic Systems

Wet Weather Groundwater Determinations & Percolation Testing: Closed for the 2023 Season

Published: April 26, 2023

rain gauge

  • Groundwater determinations and percolation testing are closed for the season.

  • Rainfall totals data and/or testing dates are valid as of April 21, 2023.

More Information: Wet Weather Groundwater Determinations & Percolation Testing