
The following water quality report for Post Falls, Idaho, is based on studies conducted by the Environmental Working Group (EWG) from 2013 to 2023.
Your water comes from the Rathdrum Prairie Aquifer, which covers 250 square miles of Idaho.
Would you like to have a local water expert go over your specific water chemistry to better your understanding of the water quality that comes directly out of your tap?


The city water of Post Falls tested positive for 9 contaminants. Have questions or concerns? WHS Water has a list of local water experts in your area who can help you understand your specific water chemistry and viable forms of filtration.
Get in contact with local water experts in your area to help you learn about your specific water chemistry. Receive complimentary water testing and analysis. Find what's in your water.
WHS Water Division takes pride in providing extensive drinking water quality data, research, and understanding of your local provider's water quality. If you'd prefer to have your water tested in person, reach out to a local water expert in the Eastern Washington and Northern Idaho area.

Learn about the research and science behind WHS Health Guidelines as a way to fill in the gaps in outdated government standards. WHS guidelines are created to establish standards that prioritize health and safeguard drinking water.
Environmental Working Group (EWG) “EWG’s Tap Water Database: What’s in Your Drinking Water?” 2024 https://www.ewg.org/tapwater/

We partner with local water companies that provide complimentary water testing.
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