Trademark & copyright disclosure

Name and non-affiliation

"CityH2O" is used on this website as the descriptive name of an independent information resource about city drinking water, derived from the domain name cityh2o.com ("city" + "H₂O", the chemical formula for water). No trademark registration for "CityH2O" is claimed by this website at this time.

CityH2O is not affiliated with, endorsed by, sponsored by or connected to any company, product, utility, municipality, government agency or organisation that uses "City H2O", "CityH2O", "City Water" or any similar name or mark, in any country. Any similarity is coincidental. If you hold rights in a similar name and have a concern, please reach us through the contact page and we will respond promptly.

Third-party marks

Names of utilities, cities, agencies (such as the U.S. EPA, USGS, CDC and Health Canada), certification bodies (NSF, WQA, IAPMO, CSA Group, UL), YouTube channels and other organisations are used only to identify them, under nominative fair use. They are the property of their respective owners, and their mention does not imply endorsement of CityH2O.

Copyright

© 2026 CityH2O. Original text, graphics, layout, calculators, the Filter Finder logic and the compilation of city profiles on this site are protected by copyright. You may link to any page and quote short excerpts with attribution and a link. Republishing full articles or data compilations requires written permission.

Embedded videos remain the property of their creators and are shown through YouTube's standard embed player. News headlines are short factual references linking to their original publishers. Public-domain U.S. government information is summarised and cited where used.

Copyright complaints

If you believe content on this site infringes your copyright, send a notice through the contact page including: identification of the work, the URL of the material, your contact details, a good-faith statement, and a statement under penalty of perjury that you are authorised to act. We will remove infringing material promptly.