The oldest housing on this site
The median home in Salem was built in 1938. Only three in ten housing units are single-family houses. Thirty-eight percent are in two- to four-family houses, the highest share of any town here, and another third are in larger buildings.
In buildings that old and that full, a water heater is often in a shared basement or a closet above another apartment. Find out before the plumber arrives which unit the heater serves and where its shutoff is. Heaters above someone else. A quarter of Salem homes heat with electricity.
The water
Salem shares a water system with Beverly. It draws from the Ipswich River and from Wenham Lake and two other reservoirs. The water board puts hardness at about 54 to 81 milligrams per liter, which runs from soft to moderately hard. A yearly flush is enough. How to do it.
Gas and rebates
National Grid supplies both gas and electricity. For a gas smell, leave and call 911, then National Grid at 800-233-5325. Mass Save's 2026 rebate on a heat pump water heater is $750.