What was found in ZIP 02451
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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Lead | 0.0019 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: WALTHAM WATER DEPARTMENT · 65,218 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 02451
| Supplier | State | Population served |
|---|---|---|
| WALTHAM WATER DEPARTMENT | MA | 65,218 |
Frequently asked questions about ZIP 02451 tap water
Is the tap water in ZIP 02451 safe to drink?
EPA testing detected 1 contaminant across the water suppliers serving ZIP 02451. 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 02451?
1 public water supplier report EPA drinking-water monitoring for ZIP 02451. Each is listed above with its population served.
What contaminants are in ZIP 02451's water?
EPA monitoring detected Lead across this ZIP's suppliers. The full list with levels and sources is above.