Legal
Privacy policy
Last updated: October 28, 2026
What we collect
There are no accounts on Water Hardness Check and no forms that ask for personal details. Water Check does all of its work inside your browser; whatever numbers you enter are neither sent to us nor saved.
Analytics
We may count page views with a privacy-friendly, cookie-free analytics service (for example Umami or Cloudflare Web Analytics) to learn which pages help people. These services set no cookies and don't identify you.
Affiliate links
If you click through to a partner store, that store and the Awin affiliate network may set their own cookies so the sale is credited. Once you are on their sites, their privacy policies apply.
Hosting
A content delivery network serves the site and may log technical details, such as your IP address and browser type, to keep it secure and running.
When you email us, we use the message only to answer you; we never put your address on a mailing list.
Contact
Questions about privacy: use our contact page.