Zip 96801 · Honolulu, HI · 30 water systems · EWG data 2013–2023
Honolulu’s tap water has 40 contaminants, 21 above health guidelines.
- Water quality score
- 3out of 10Poor
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
- 21of 40 found
- Linked to cancer
- 15above guideline
- In the SGS test programme
- 8of 40 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: 0.2 ppb
Health guideline: 0.0007 ppb
286×Removed by RO
Level found: 2.04 ppb
Health guideline: 0.02 ppb
102×Tested · 98.6%
Level found: 10.6 ppb
Health guideline: 0.15 ppb
71×Removed by RO
Level found: 7.18 ppm
Health guideline: 0.14 ppm
51×Tested · >99.9%
Level found: 7.18 ppm
Health guideline: 0.14 ppm
51×Removed by RO
Level found: 1.4 ppb
Health guideline: 0.03 ppb
47×Removed by RO
Level found: 4.25 ppb
Health guideline: 0.1 ppb
43×Removed by RO
- PFAS
Level found: 0.034 ppt
Health guideline: 0.001 ppt
34×Removed by RO
Level found: 1.58 ppb
Health guideline: 0.06 ppb
26×Removed by RO
Level found: 10.6 ppb
Health guideline: 0.5 ppb
21×Removed by RO
10 of 40 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 96801. 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 Honolulu’s water that were in that programme.
- Hexavalent chromium98.6%Maximum measured reduction
- Nitrate>99.9%Maximum measured reduction
- Arsenic>97.2%Maximum measured reduction
Figures are the laboratory’s own, measured under test conditions. Your tap water differs from the challenge water.