Denver, CO 80201 · Utility tests 2013–2023
Denver’s tap water has 43 contaminants, 20 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
- 20of 43 found
- Linked to cancer
- 16above guideline
- In the SGS test program
- 10of 43 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: 4.75 ppb
Health guideline: 0.004 ppb
1,188×Tested · >97.2%
Level found: 26.8 ppb
Health guideline: 0.06 ppb
446×Removed by RO
Level found: 25.7 ppb
Health guideline: 0.1 ppb
257×Removed by RO
Level found: 35.3 ppb
Health guideline: 0.15 ppb
235×Removed by RO
- PFAS
Level found: 0.186 ppt
Health guideline: 0.001 ppt
186×Removed by RO
Level found: 9.51 ppb
Health guideline: 0.06 ppb
159×Removed by RO
Level found: 4.07 ppb
Health guideline: 0.03 ppb
136×Removed by RO
Level found: 12.4 ppb
Health guideline: 0.1 ppb
124×Removed by RO
Level found: 10.5 ppb
Health guideline: 0.1 ppb
105×Removed by RO
Level found: 10.1 ppb
Health guideline: 0.2 ppb
51×Removed by RO
10 of 43 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 80201. 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 Denver’s water that were in that program.
- Arsenic>97.2%Maximum measured reduction
- Nitrate>99.9%Maximum measured reduction
- Hexavalent chromium98.6%Maximum measured reduction
Figures are the laboratory’s own, measured under test conditions. Your tap water differs from the challenge water.