Emotions ran high in Edgartown this week over a recent board of health decision to move forward with a plan to add fluoride to town water.

Marking the second time this year that a state court has recognized protective land use regulations in the town of Edgartown, the Massachusetts appeals court early this month upheld a local board of health regulation which prohibits guest houses in the Katama area.

The regulation, first adopted by the town board of health in 1985, was rooted in concern about contamination of the groundwater at Katama. The case is important because it upholds the broad powers of town boards of health.