Honolulu, HI 96801 · Utility tests 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 program
- 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
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 program.
- 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.