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

Is there lead in Guilford's tap water?

NO LEADfound in Ctwc - Shoreline Region-Guilford's water at the latest test, in tests since 2026

Too little lead to measure

Water companies that supply Guilford

3 public water companies list Guilford as a place they supply. The biggest is Ctwc - Shoreline Region-Guilford, with about 33,975 people. The highest latest result among Guilford's water companies is 2.3 parts per billion, at Quonnipaug Hills - Main. None of the 3 with results was above 15 at its latest test. 2 found too little lead to measure. Small ones like Quonnipaug Hills - Section I supply just their own grounds or street; most of Guilford gets its water from Ctwc - Shoreline Region-Guilford. Your water bill names yours.

Ctwc - Shoreline Region-Guilfordabout 33,975 people · latest lead test: none found · 860-664-6125
Quonnipaug Hills - Mainabout 564 people · latest lead test: 2.3 ppb · 203-415-4316
Quonnipaug Hills - Section Iabout 27 people · latest lead test: none found · 203-488-9500

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