This just released on the City of Healdsburg’s website:
“The City of Healdsburg in cooperation with the Sonoma County Water Agency is now taking sign-ups for a low flow toilet replacement program to be released soon. The program will pay for (at no cost to the property owner) the replacement of older high-flow toilets with the installation by a licensed plumber of up to two high-efficiency toilets (0.8 gallons per flush)”
Visit the City’s website for more information. From there you can apply on the County’s website.