Cal. Water Code § 47350
When any installment has become delinquent, the county treasurer shall, within 10 days, publish a notice in the county once a week for two successive weeks containing all the following:
(f) A statement that each of the described parcels will be sold at public auction by the county treasurer in front of the county courthouse at a specified day and hour to pay the delinquent installment plus accrued interest and penalty.
The day of sale shall not be less than 30 nor more than 60 days from the date of delinquency.