What's in your tap water, and what should you do about it?
- Your water's hardness and other numbers, taken from your utility's own report.
- Whether a salt water softener is allowed where you live.
- The kind of filter or softener that fits your water.
Find by city or ZIP · Is a salt softener legal here? · Guides · Treatments
Most-searched city files
Pages people actually search. Numbers still come from each utility report.
Example cities
Salt softener restricted
Large cities
Covers about 18,000 US cities. Every number links to the utility report it came from.