Wet Weather Groundwater Determinations & Percolation Testing for 2023 Season

Published: April 11, 2023

Groundwater determinations are open in the Guerneville area and closed in the six other areas. Percolation testing is open in all seven areas. (Testing areas: Cloverdale, Guerneville, Healdsburg, Petaluma, Santa Rosa, Sebastopol, and Sonoma).
Rainfall totals data and/or testing dates are valid as of April 9, 2023.