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How to find hardness in your water quality report
Community water systems publish an annual water quality report, also called a Consumer Confidence Report (CCR). It's free, and it's the first place to look.
Finding it
- Search “[your utility] water quality report” or check your water bill. EPA's CCR page explains what these reports are and links to search tools.
- Check the year. The report covers the previous calendar year's testing.
Finding hardness inside it
- Look in the “unregulated” or “other parameters” table, or search the PDF for “hardness,” “calcium” or “grains.”
- Note the unit (mg/L, ppm or gpg) and convert with 1 gpg ≈ 17.1 mg/L.
- If it gives a range, plan around the high end.
Hardness isn't listed?
That's common. CCRs mainly report regulated contaminants, and hardness is a nuisance property rather than a health standard (USGS). For example, the City of Youngstown, Ohio's 2025 water quality report (PDF) mentions calcium carbonate scale but doesn't give a hardness figure. That report says a complete list of results is available on request. When the report has no number:
- Call or email your utility and ask for total hardness as CaCO3.
- Or test your own tap. EPA suggests a professional test as one option.
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Once you have the number, go to the decision guide.
Sources
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