Boston, MA 02108 · Utility tests 2013–2023
Boston’s tap water has 23 contaminants, 11 above health guidelines.
- Water quality score
- 5out of 10Fair
Counts contaminants above an EWG health guideline, weighted by the harm the guideline protects against. 8 and above is good; 5 and above is fair.
- Above a health guideline
- 11of 23 found
- Linked to cancer
- 9above guideline
- In the SGS test program
- 6of 23 found
Contaminants found here that SGS measured the Sans Water Purifier against.
Water data: EWG Tap Water Database, utility test results 2013–2023. Guidelines are EWG health guidelines set by federal or state public-health authorities; legal limits differ.
What’s in the water
Level found: 16.8 ppb
Health guideline: 0.06 ppb
281×Removed by RO
Level found: 14.7 ppb
Health guideline: 0.1 ppb
147×Removed by RO
Level found: 17.2 ppb
Health guideline: 0.15 ppb
115×Removed by RO
Level found: 11 ppb
Health guideline: 0.2 ppb
55×Removed by RO
Level found: 3.25 ppb
Health guideline: 0.06 ppb
54×Removed by RO
Level found: 13.1 ppb
Health guideline: 0.4 ppb
33×Removed by RO
Level found: 2.02 ppb
Health guideline: 0.1 ppb
20×Removed by RO
- PFAS
Level found: 0.832 ppt
Health guideline: 0.09 ppt
9.2×Tested · >98.8%
Level found: 0.808 ppb
Health guideline: 0.1 ppb
8.1×Removed by RO
- PFAS
Level found: 0.44 ppt
Health guideline: 0.3 ppt
1.5×Tested · >99%
10 of 23 contaminants
Tested: measured by SGS on the Sans Water Purifier, the lab’s own figure. Removed by RO: listed by EWG as reduced by reverse osmosis, the purifier’s filter type. Not tested: neither.
Where this report applies
Utilities serving zip 02108. Map data © OpenStreetMap contributors.
What the Sans Water Purifier is tested to reduce
SGS, an ISO/IEC 17025 laboratory, measured the purifier’s reduction of 19 contaminants (Dec 2023 to Mar 2024). These are the worst in Boston’s water that were in that program.
- Perfluorooctanoic acid>98.8%Maximum measured reduction
- Perfluorooctane sulfonate>99%Maximum measured reduction
- Nitrate>99.9%Maximum measured reduction
Figures are the laboratory’s own, measured under test conditions. Your tap water differs from the challenge water.