WellWaterData is a free directory of licensed well drillers, pump installers, and certified water-testing labs, compiled from official state licensing records, plus practical guidance for the ~13 million U.S. households on private wells.
This site is built and maintained by Willis Innovations LLC, an independent publisher. Our data comes from official public sources — state licensing boards, health department rosters, and federal datasets — refreshed on an ongoing basis, with the source named on every page. We are not affiliated with any government agency, and inclusion in a directory is not an endorsement.
Some pages contain affiliate links or quote-request forms; if you buy a product or request a service through them, we may earn a commission at no additional cost to you. That revenue funds the data work. See our affiliate disclosure.
Found an error — a wrong listing, a stale license, a bad number? Email preston@willisinnovations.com and we'll fix it.