Fluoride in Kingston’s water: not verified — and how to check it yourself

We don’t know — and we’d rather say that plainly than guess. Kingston Water System publishes a 2025 Consumer Confidence Report, but when we tried to read it, the report’s contents didn’t come through, so we never saw its fluoride row. The CDC’s My Water’s Fluoride lookup returned no retrievable data for the system, and its EWG page shows no fluoride value either. The answer exists — it sits in the fluoride row of that 2025 report, on the City of Kingston website — and the “How to check” section above walks you to it.

Fair question. The report is a PDF posted on the City of Kingston website, and our research tools couldn’t extract readable content from it — the file exists, but its tables never reached us in a form we could read. We know the report is real and current: the Tennessee Water Authority’s Kingston guide drew other data from that same report. Rather than guess at numbers we never saw, we’re telling you exactly where the answer sits so you can read it yourself — and we’ll update this page the moment we can verify the figure.

Find the detected-contaminants table and look for the row labeled “Fluoride.” Two things in that row answer everything: the level, in mg/L, and the listed source. A level near 0.7 mg/L with “water additive” (often worded “water additive which promotes strong teeth”) as the source means the system adjusts fluoride to the CDC’s recommended level. A much lower level with a source like “erosion of natural deposits” means the fluoride present is whatever occurs naturally in the source water. Either way, that one row settles both the status and the level.

Yes — and with Kingston’s water status unknown, that answer doesn’t change at all. Fluoridated water, where it exists, is background exposure: a low level in your mouth throughout the day. Fluoride toothpaste is the concentrated dose applied directly to your teeth twice a day, and it does most of the protective work either way. The ADA recommends fluoride toothpaste for everyone, in fluoridated communities and out of them — so brush twice daily with it, whatever the report eventually shows.

Because Kingston’s water status is unknown, the sensible move is to treat your household as if it may have no water fluoride at all. On that basis, professional fluoride varnish — a concentrated treatment painted on at the dental office — is a reasonable, low-cost safeguard, especially for kids and for anyone with a pattern of new cavities, braces, dry mouth, or exposed roots. That’s a judgment call based on the gap in what we know, not a fact about Kingston’s water. Ask what risk factor it’s aimed at, and revisit the question once the report’s fluoride row is confirmed.

Then this page’s question is yours to ask that district directly. Roane Central Utility District, Cumberland Utility District, Watts Bar Utility District, and Watts Bar East Utility District serve parts of the wider Kingston area and buy treated water rather than treating their own. A purchased-water system’s fluoridation follows its source system — but the public sources we could check don’t name which system supplies each district, so we won’t claim their status follows Kingston’s or anyone else’s. Call the district named on your bill and ask two things: who supplies your water, and is it fluoridated? They should name the source on request.

None of this uncertainty applies to you, because the answer for wells is settled: no utility fluoridates, tests, or reports on your water. Natural fluoride in well water varies — some wells have almost none, some land near the recommended level, and a few naturally run high. Have your water tested by a certified laboratory before assuming it contains fluoride, and take the result to your dentist or your child’s pediatrician before considering any supplement. Never start fluoride supplements on a guess.