June 30, 2022 - July 4, 2022 Marin County Fair Marin County Fair June 30, 2022 - July 4, 2022 Marin County Fair The Novato Sanitary District and five other Wastewater Agencies of Marin County will host a booth at the Marin County Fair. Come by, take an environmental quiz, and get a prize. It will be fun, and you'll learn something too!