Plumbers in Woburn, MA

Post-war houses from the Route 128 boom

By local standards Woburn's homes are young. The census puts the median year built at 1968, a decade or more later than in Medford, Malden or Everett, and fewer than one unit in five (18.7%) dates from 1939 or earlier. The single busiest decade was the 1950s, with about 3,206 units, or 18.8% of today's housing, and roughly another third went up between 1960 and 1989. The city's own history links that growth to Route 128: the highway opened in 1951, and by 1960 the population had jumped to 31,241.

Detached single-family homes account for 46.5% of all units, two-families about 13%, and complexes of 50 or more apartments about 11%. Where a 1950s or 1960s house still has its original piping, everything from the supply lines to the sewer out to the street has been in service for 60 or 70 years. At that age, expect rust buildup that cuts pressure inside steel water lines, pinhole leaks, and drains that run slowly because of scale or roots. If you live in one of the big condo or apartment complexes, ask the association or management who is responsible for shared risers and drains before booking anyone.

Horn Pond wells, MWRA water and the PFAS notice

Five wells draw from the aquifer under the Horn Pond area, and the Horn Pond Treatment Plant, rated at 4.07 million gallons a day, filters and treats that water; the city buys the rest of its supply from the MWRA. Together the DPW and the MWRA serve about 12,000 residential and commercial customers. A state source water assessment in 2003 rated the local supply's susceptibility to contamination as high, and the city says it monitors in and around its sources.

PFAS is the issue to know about. In 2023 Woburn received a Notice of Non-compliance for failing to stay under the Massachusetts PFAS6 standard of 20 parts per trillion. The 2025 water quality report shows the Horn Pond well field averaging 17.1 ppt in 2024, with individual results ranging from not detected to 20.3 ppt, and lists no PFAS violation for that year. The city says it is working closely with MassDEP on the problem.

Water quality has a long history here. Contamination found in 1979 in the city's Wells G and H, in the Pine Street area of east Woburn, led to the lawsuit told in A Civil Action; the city's current wells are in the Horn Pond area. If you are weighing an under-sink filter, read the latest annual report first and ask the Water Department (781-897-5945) about recent results.

Galvanized service lines, not lead

Woburn's service line inventory, covering every property, was finished in October 2024 and submitted to MassDEP. It found no lead service lines, but it did find a few galvanized lines that could contribute lead, and it notified those owners. Because records were incomplete for some properties, the city mailed letters in November 2024 to every address where the service line material was unknown.

Tap samples were low in 2024: the 90th-percentile lead result was 1.07 parts per billion against an action level of 15, and none of the 32 samples went over. If one of those letters came to your house, or you suspect galvanized pipe, call the Water Department, which also replaces old iron pipe services. A plumber can tell copper from plastic or steel where the line comes through your foundation wall; our lead pipes guide shows what to look for.

The city is renewing old mains as well. In 2024 crews cleaned and relined unlined pipe on Francis Street, Kilby Street and Glenwood Avenue, and installed a new main on Newbridge Avenue from Elm Street to Main Street.

Basement flooding, sump pumps and backflow devices

Flooding in Woburn is not confined to flood maps. The city has recorded 567 places where flooding has happened, and only 13 of them are inside the most recent FEMA 1% chance flood zone, so a house nowhere near a mapped zone can still get water in the basement during a heavy storm.

The city recommends a sump pump with battery backup, drain plugs, and sewer backflow prevention valves. It also prohibits attaching sump pumps to the sanitary sewer, because that water contributes to sewer backups. A plumber can install a backwater valve where the house sewer leaves the building and pipe the pump's discharge outside.

Backflow devices, which stop contaminated water from flowing back into the public mains, are tested through Woburn's cross-connection control program. If your plumber is installing or replacing one, the Water Department publishes a Backflow Design and Data Form and a guide called Cross Connection Control and You, and the permit portal has its own Back Flow Form.