Zip 94601 · Oakland, CA · 1 water systems · EWG data 2013–2023
Oakland’s tap water has 13 contaminants, 5 above health guidelines.
- Water quality score
- 6out 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
- 5of 13 found
- Linked to cancer
- 4above guideline
- In the SGS test programme
- 3of 13 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
Worst first. Contaminants Sans has no evidence for come last unless they are above their guideline. Levels are utility averages reported to EWG.
Level found: 36.2 ppb
Health guideline: 0.06 ppb
603×Removed by RO
Level found: 43.7 ppb
Health guideline: 0.1 ppb
437×Removed by RO
Level found: 54.7 ppb
Health guideline: 0.15 ppb
364×Removed by RO
Level found: 0.9 ppb
Health guideline: 0.1 ppb
9.0×Removed by RO
Level found: 0.0509 ppb
Health guideline: 0.02 ppb
2.5×Tested · 98.6%
Level found: 171 ppb
Health guideline: 210 ppb
0.82×Tested · >99.8%
Level found: 10.6 ppb
Health guideline: 600 ppb
0.02×Removed by RO
Level found: 0.15 ppb
Health guideline: 40 ppb
0.00×Removed by RO
- PFAS
Level found: 0.49 ppt
Health guideline: 1,000 ppt
0.00×Removed by RO
Level found: 0.0948 ppb
Health guideline: 1,500 ppb
0.00×Removed by RO
10 of 13 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 94601. 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 Oakland’s water that were in that programme.
- Hexavalent chromium98.6%Maximum measured reduction
- Chlorate>99.8%Maximum measured reduction
- Fluoride>99.9%Maximum measured reduction
Figures are the laboratory’s own, measured under test conditions. Your tap water differs from the challenge water.