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

Is there lead in Stonington's tap water?

NO LEADfound in Aquarion-Mystic's water at the latest test, in tests since 2026

Too little lead to measure

Water companies that supply Stonington

3 public water companies list Stonington as a place they supply. The biggest is Aquarion-Mystic, with about 10,788 people. The highest latest result among Stonington's water companies is 0.8 parts per billion, at Aquarion-Arlington Acres. None of the 3 with results was above 15 at its latest test. 2 found too little lead to measure. Small ones like Aquarion-Arlington Acres supply just their own grounds or street; most of Stonington gets its water from Aquarion-Mystic. Your water bill names yours.

Aquarion-Mysticabout 10,788 people · latest lead test: none found · 203-926-4320
Ctwc - Shoreline Region-Masons Islandabout 445 people · latest lead test: none found · 860-664-6125
Aquarion-Arlington Acresabout 392 people · latest lead test: 0.8 ppb · 203-926-4320

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