What was found in ZIP 02138
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 1060 µg/L 27% of the EPA limit 4000 µg/L | 1/1 | SYR4 |
| Nitrate | 771 µg/L 7.7% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Nitrite | 175 µg/L 18% of the EPA limit 1000 µg/L | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 76.4 µg/L 127% of the EPA limit, in the worst sample — 60 µg/L | 1/1 | SYR4 |
| Barium | 60 µg/L 3% of the EPA limit 2000 µg/L | 1/1 | SYR4 |
| TTHM | 32 µg/L 40% of the EPA limit 80 µg/L | 1/1 | SYR4 |
| Copper | 1.3 µg/L 0.1% of the EPA limit 1300 µg/L | 1/1 | SYR4 |
| Chromium | 1.3 µg/L 1.3% of the EPA limit 100 µg/L | 1/1 | SYR4 |
| Lead | 0.0080 mg/L 53% of the EPA limit 0.0150 mg/L | 1/1 | LCR |
| PFOA | 0.0048 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Pfpea | 0.0036 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Pfhxa | 0.0031 µg/L No EPA limit set | 1/1 | UCMR-5 |
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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 02138
| Supplier | State | Population served |
|---|---|---|
| CAMBRIDGE WATER DEPARTMENT | MA | 118,214 |
Frequently asked questions about ZIP 02138 tap water
Is the tap water in ZIP 02138 safe to drink?
EPA testing detected 12 contaminants across the water suppliers serving ZIP 02138. 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 02138?
1 public water supplier report EPA drinking-water monitoring for ZIP 02138. Each is listed above with its population served.
What contaminants are in ZIP 02138's water?
EPA monitoring detected Fluoride, Nitrate, Nitrite, Total Haloacetic Acids (HAA5), Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.