What we can send
- The certified-lab list: labs from official state drinking-water certification lists, with the contaminants each is certified for and the state’s homeowner-sample marks. Business details only.
- The tables behind our research studies: testing deserts by state and county, the Well Owner Access Index, home-sale testing laws, hard-to-test contaminants, state-lab prices, and septic and well rules at sale.
- Other cuts of the data: one state, one contaminant, one county. Ask, and we will tell you what we have.
How to ask
Use the data request form. Tell us who you are, the publication or institution, where the work will appear, and which data you need. We read every request and reply by e-mail; we decide case by case what we send.
Not a substitute for the official lists. Certifications and rules change between our checks. Every page on this site links the official source and the date we checked it. For a quick figure, quote the page itself with a link.
Citation
Please cite WaterListed (waterlisted.com), the page or study title, its URL and the date, and the official sources it names. The underlying facts come from public government lists and rules, which remain subject to their publishers’ own terms.
See also the sources and method page.