Bill Swindell, THE PRESS DEMOCRAT
A new regulation aimed at improving the water quality of two tributaries that run into San Pablo Bay means vineyard owners in those watersheds will have to obtain new permits under more rigorous guidelines for their storm water runoff.
In approving the new rule last month, members of the San Francisco Bay Regional Water Quality Control Board said they were concerned that vineyards could be discharging sediment and pesticides into the watershed that would, among other things, trigger erosion and threaten fish habitat.
Under the rule, land owners in the Sonoma Creek and the Napa River watersheds will be under three different levels of monitoring, from those who are largely adhering to the best environmental practices that have been certified by a third-party organization to those that will fall under more stringent oversight because they would have to make significant changes to management of their property.
The board did not say how many vineyard owners would be affected, but the rule would cover about 40 percent of the total land in both watersheds, representing about 59,000 planted acres. Those with fewer than 5 acres of vineyards would be exempted.
The wine industry was largely rebuffed in its push for major changes from a proposed draft issued by the board last year. Vintners estimate that it could cost from $5,000 to $7,000 to develop a farm plan to obtain the new permit, and the total could significantly rise to much more if they are ordered to make changes to their properties, such as retrofitting an unpaved road or monitoring water quality.