# Boston, MA — Drinking Water Quality

> Contaminant levels for the Boston, MA public water system, transcribed from its annual Consumer Confidence Report and compared to federal limits.

- Page: https://www.thewatermap.com/water/boston-ma
- Source: the utility's annual Consumer Confidence Report (CCR)
- Verification: transcribed by a model, cross-checked by a second model, approved by a human
- Contaminants measured: 7
- Part of The Water Map — https://www.thewatermap.com

## Contaminants measured

| Contaminant | Category | Measured level | Federal limit | Status |
|---|---|---|---|---|
| Chloramine | Disinfectants | 0.04–3.85 mg/L (Range) | 4 mg/L (MCL) | Approaching the limit |
| HAA5 | Disinfection byproducts | 4.4–24.9 ug/L (Range) | 60 ug/L (MCL) | Within the limit |
| TTHM | Disinfection byproducts | 26.3 ug/L (Average) | 80 ug/L (MCL) | Within the limit |
| Fluoride | Inorganic chemicals | 0.33–0.77 mg/L (Range) | 4 mg/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 0.62 mg/L (Average) | 10 mg/L (MCL) | Within the limit |
| Barium | Metals | 0.008–0.009 mg/L (Range) | 2 mg/L (MCL) | Within the limit |
| Combined Radium | Radionuclides | 0.82 pCi/L (Average) | 5 pCi/L (MCL) | Within the limit |

_Figures are the utility's own published numbers. Generated 2026-05-21 from thewatermap.com._