“The national debate over the Affordable Care Act seemed an unlikely topic of discussion at Tuesday’s meeting of the Fairfax County Board of Supervisors — especially since the item on the agenda was whether to reappoint a longtime member of the local water authority.

Yet the law was what the supervisors focused on, specifically a letter to members of Congress written last fall by water board veteran Burton J. Rubin, warning that the insurance requirements of the Affordable Care Act would cause the water authority to stop insuring its employees.”