Voters in all nine Bay Area counties will decide in June whether to approve a $12 parcel tax that would raise $25 million a year for 20 years for restoration projects on San Francisco Bay. The San Francisco Bay Restoration Authority, an eight-year-old government agency, voted last week to put the measure on the ballot, reportedly the first time a parcel tax has been on the ballot in all nine counties. Since the 1800s, the authority says, 187,000 acres of bay marsh has been diked or filled in, with little restored to its original habitat functions. The money from the measure would fund projects to restore wildlife habitat, improve water quality, protect land from flooding, curb pollution and foster public access. Bay restoration projects, said Inverness resident Jerry Meral, both help the environmental and help create buffers for sea-level rise impacts. Though the bay is not in West Marin, he said that residents out here still benefit from the work. “A whole bunch [of sites] on the east side are heavily used by birders on the west side. I was there a couple days ago. Our local birding group went there recently,” said Mr. Meral, a former deputy secretary of the state’s natural resources agency. Half of the funds would be allocated to four regions—the North, South, East and West Bays—based on population. The other half would be distributed to counties regardless of geographic area. The measure has snagged broad support from officials, agencies and nonprofits throughout the Bay Area; a two-thirds majority is required for passage.