New development projects in most of Marin won’t have new landscaping irrigated with drinking water under drought restrictions imposed by Marin Municipal Water District this week.

The Board of Directors voted Tuesday to approve the ban aimed at preserving the district’s dwindling reservoir supplies in the Mount Tamalpais watershed amid severe drought conditions. The district estimates it could run out of reservoir supplies by next summer if the region experiences a similarly historic dry winter as last year and conservation efforts do not improve.