Water Quality Lookup
What is in your tap water?
Check the information in reviewed public reports, understand its limits, and learn how to choose a filter certified for a measured contaminant. Covering 108 water utilities across 7 countries.
United States
51 utilities, 60 cities
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United Kingdom
19 utilities, 66 cities
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Ireland
1 utilities, 18 cities
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Canada
19 utilities, 34 cities
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Australia
11 utilities, 20 cities
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Singapore
1 utilities, 5 cities
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New Zealand
6 utilities, 12 cities
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How this works
- Pick your country above.
- Enter your postcode, ZIP code or city.
- See what the most recent public report available at our last review listed.
- Use dated measurements to choose a filter certified for the exact contaminant.
We cover 608 postcode / ZIP prefixes directly. If your specific area is not in our database, we fall back to country-level guidance based on known national water issues.
Important: The data shown reflects the most recent public water quality reports available at time of last review. Actual levels vary day-to-day and by address within a supply. Always verify with your local utility for current conditions, and if you have any reason to believe your water is unsafe, contact your provider directly.