Watercolour of a small house at dusk, with the water meter cover in the sidewalk out front.

Is there lead in Marlborough's tap water?

0.6PPBparts per billion of lead in Aquarion-Marlborough's water at the latest test, in tests since 2026

Under the legal limit of 15 ppb

Water companies that supply Marlborough

7 public water companies list Marlborough as a place they supply. The biggest is Aquarion-Marlborough, with about 1,348 people. The highest latest result among Marlborough's water companies is 4.6 parts per billion, at Ctwc - Sachem Village Condo. None of the 7 with results was above 15 at its latest test. 1 found too little lead to measure. Small ones like Ctwc - Florence Lord (Mash) supply just their own grounds or street; most of Marlborough gets its water from Aquarion-Marlborough. 6 are small systems serving fewer than 500 people each, such as a mobile home park, a subdivision or a business with its own well. Your water bill names yours.

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