Louisville, KY 40201 · Utility tests 2013–2023
Louisville’s tap water has 28 contaminants, 10 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
- 10of 28 found
- Linked to cancer
- 7above guideline
- In the SGS test program
- 7of 28 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: 27.5 ppb
Health guideline: 0.06 ppb
459×Removed by RO
Level found: 30.3 ppb
Health guideline: 0.15 ppb
202×Removed by RO
Level found: 15.8 ppb
Health guideline: 0.1 ppb
158×Removed by RO
- PFAS
Level found: 1.82 ppt
Health guideline: 0.09 ppt
20×Tested · >98.8%
Level found: 0.4 ppb
Health guideline: 0.02 ppb
20×Tested · 98.6%
Level found: 0.75 pCi/L
Health guideline: 0.05 pCi/L
15×Removed by RO
Level found: 0.662 ppm
Health guideline: 0.14 ppm
4.7×Tested · >99.9%
Level found: 0.578 ppm
Health guideline: 0.14 ppm
4.1×Removed by RO
Level found: 142 ppb
Health guideline: 50 ppb
2.8×Removed by RO
- PFAS
Level found: 0.361 ppt
Health guideline: 0.3 ppt
1.2×Tested · >99%
10 of 28 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 40201. 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 Louisville’s water that were in that program.
- Perfluorooctanoic acid>98.8%Maximum measured reduction
- Hexavalent chromium98.6%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.