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Tap water quality report

ZIP 02471 — Watertown, MA

EPA monitoring across the 1 water supplier serving ZIP 02471 in Watertown, MA detected 1 contaminant. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier below, with the EPA limit for each.

1
water supplier
35,985
people served
1
contaminants found

What was found in ZIP 02471

The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Lead
0.0011 mg/L 7.1%
of the EPA limit 0.0150 mg/L
Main supplier: WATERTOWN DEPARTMENT OF PUBLIC WORKS · 35,985 people · 2025
1/1 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Water suppliers serving ZIP 02471

SupplierStatePopulation served
WATERTOWN DEPARTMENT OF PUBLIC WORKS MA 35,985

Frequently asked questions about ZIP 02471 tap water

Is the tap water in ZIP 02471 safe to drink?

EPA testing detected 1 contaminant across the water suppliers serving ZIP 02471. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.

Which water suppliers serve ZIP 02471?

1 public water supplier report EPA drinking-water monitoring for ZIP 02471. Each is listed above with its population served.

What contaminants are in ZIP 02471's water?

EPA monitoring detected Lead across this ZIP's suppliers. The full list with levels and sources is above.