Tennessee Dental Authority · City Fluoride Series

Fluoride in Madisonville, TN: what changed in 2025

Last updated: October 20, 2026

The short answer

Madisonville’s water was fluoridated for years through its supplier, Tellico Area Services System (TASS). On August 20, 2025, the TASS board voted unanimously to remove fluoride. Whether removal has fully taken effect — and what the current level is — has not yet been published.

Water quality in Madisonville

Curious about your tap water? Tennessee Water Authority has the full Madisonville water quality guide — contaminant data, utility details, and filter recommendations.

The facts

Your utility
Madisonville Water DepartmentSystem ID TN0000425 · serves about 15,087 people
Where the water comes from
Purchased from Tellico Area Services System (TASS)System ID TN0000726 · Madisonville buys treated water rather than treating its own
Water source
Tellico LakeSurface water, treated by TASS
Fluoride status
Removal voted Aug 20, 2025 — implementation unverified
Last published fluoride level (pre-removal)
0.470 mg/L averageRange 0.364–0.527 mg/L · 2024 data, published in TASS’s Water Quality Report 2025 · pre-removal
Current fluoride level
Not yet publishedNo post-vote water quality report has been released

Read the headline number carefully. The 0.470 mg/L figure you may see quoted for Madisonville is a pre-removal average from 2024 testing. It describes the water while TASS was still adding fluoride. It is not a current level, and this page will not present it as one.

Madisonville is what water regulators call a purchased-water (consecutive) system: the city does not run its own treatment plant for this supply. It buys finished, treated surface water from TASS, which draws from Tellico Lake. That arrangement is why a decision made by the TASS board — not by the city of Madisonville — determines whether Madisonville’s tap water contains added fluoride.

What happened: a short timeline

  1. For years

    TASS fluoridated the water it treated from Tellico Lake, and Madisonville’s water was fluoridated along with it, because Madisonville buys that treated water.

  2. August 20, 2025

    The TASS board voted unanimously to remove fluoride from the water supplies it serves in the Monroe and Loudon County area, as reported by WVLT.

  3. Since the vote

    The exact date fluoride addition stopped has not been published, and no post-removal fluoride level has been released. A post-removal level is not yet published — the first document likely to show one is TASS’s next Water Quality Report, covering 2025 data.

That gap between a vote and a published measurement is normal in water reporting — utilities test and report on a cycle, and reports covering 2025 data come after the year ends. But it does mean that right now, the honest answer about Madisonville’s current fluoride level is “not yet published,” and we think you deserve that answer stated plainly instead of a guess dressed up as a fact.

How the numbers compare

Three different yardsticks get mixed up in almost every fluoride argument, so here they are side by side. Only the first row is Madisonville-area data, and it is pre-removal. The other three are national benchmarks — a recommendation and two EPA standards that mean very different things.

Fluoride levels and benchmarks (mg/L)
What it is Level What it means
TASS last published level — pre-removal (2024 data) 0.470 mg/L avg What TASS reported while it was still fluoridating (range 0.364–0.527 mg/L). Pre-removal — not a current measurement.
CDC recommendation 0.7 mg/L The level the CDC recommends for community water fluoridation — the target for balancing cavity prevention against fluorosis risk. A recommendation, not a legal limit.
EPA secondary standard (SMCL) 2.0 mg/L A non-enforceable guideline aimed at preventing cosmetic effects like tooth mottling (fluorosis). Utilities are asked to notify customers above it, but it is not a health-based legal cap.
EPA enforceable limit (MCL) 4.0 mg/L The maximum contaminant level — the legal ceiling for fluoride in drinking water, set to protect against bone effects. Exceeding it is a violation.

Two things worth noticing: TASS’s pre-removal average of 0.470 mg/L sat below the CDC’s 0.7 mg/L recommendation even while the system was fluoridating, and it was nowhere near either EPA standard. The debate in Monroe and Loudon counties was never about a level anywhere close to a safety limit — it was about whether to add fluoride at all.

What it means for your teeth — either way

Because the current status is unverified, plan for the part you control. That part does not actually change much.

Toothpaste does the heavy lifting

Fluoride toothpaste, used twice a day, is the main fluoride exposure for most people’s teeth. Fluoridated drinking water was always a background exposure on top of that — smaller, steadier, and helpful, but not the foundation. Whether or not TASS’s removal has taken effect, keep brushing with fluoride toothpaste. Do not switch to fluoride-free toothpaste in response to a headline; that would remove the exposure that matters most.

Amounts for kids (ADA guidance)

If removal has taken effect

If fluoride addition has stopped, in-office fluoride treatments — the varnish or gel your dentist paints on during a visit — become more valuable, because they replace part of that lost background exposure in a concentrated dose a few times a year. That matters most for cavity-prone patients: kids with a history of cavities, people with dry mouth, exposed roots, or braces. It is a conversation for your next regular visit, not a reason to panic or book an emergency appointment. And note the conditional: we are describing what follows if removal has taken effect, because the date it stopped has not been published.

On a private well?

None of this vote affects you directly. Well water is not fluoridated by TASS or anyone else, and its natural fluoride content varies from well to well. If your home is on a private well, your fluoride picture has always depended on toothpaste and in-office treatments — and if you have never had your well water tested, a fluoride test is the only way to know what is in it.

How to confirm the current status

Three routes, in order of reliability:

  1. Ask the utilities directly. Contact Madisonville Water Department or TASS and ask two specific questions: has fluoride addition stopped, and what is the newest Consumer Confidence Report (water quality report) available? A direct answer from the utility beats any website, including this one.
  2. Check CDC My Water’s Fluoride. The CDC’s fluoridation database tracks which systems fluoridate. It can lag behind a change like this one, so treat it as a cross-check, not the final word.
  3. Watch for TASS’s next Water Quality Report. The report covering 2025 data should be the first published document that can show a post-removal level — or confirm whether fluoride was still being added at year’s end.

We will update this page when a post-removal figure is published. Until then, the status above stays exactly as written: removal voted, implementation unverified.

New to the fluoride debate and want the bigger picture — how fluoridation works, what the CDC and EPA numbers mean, and what dentists actually recommend? Start with our complete guide to fluoride and your teeth.

Questions Madisonville readers ask

Is Madisonville’s water fluoridated right now?

Honestly, that has not been published yet. Madisonville’s water was fluoridated for years through its supplier, Tellico Area Services System (TASS). On August 20, 2025, the TASS board voted unanimously to remove fluoride — but no post-vote water quality report has been published confirming the date fluoride addition stopped or a current level. Until TASS publishes one, anyone who tells you for certain either way is guessing.

What was Madisonville’s last published fluoride level?

0.470 mg/L on average, with a range of 0.364–0.527 mg/L, from 2024 testing published in TASS’s Water Quality Report 2025. That is a pre-removal figure — it describes the water while TASS was still fluoridating, not the water today.

Who decided to remove fluoride, and why does Madisonville follow that decision?

The board of Tellico Area Services System (TASS) voted unanimously on August 20, 2025 to remove fluoride, as reported by WVLT. Madisonville Water Department does not treat its own water — it buys treated water from TASS, which draws from Tellico Lake. Because Madisonville is a purchased-water system, its fluoridation status follows TASS’s decision.

Should my family change our toothpaste routine?

No change needed. Fluoride toothpaste, brushed twice a day, is your main line of defense either way — fluoridated water was always background exposure on top of it. For kids, follow the ADA amounts: a rice-grain-sized smear for children under 3, and a pea-sized amount for children 3 and older.

If the fluoride is gone, is there anything extra worth doing?

If removal has taken effect, fluoride treatments at the dentist — varnish or gel applied in the office — become more valuable, because your teeth lose the small, steady background exposure from drinking water. That matters most for people who get cavities often, kids, and anyone with dry mouth. Ask at your next regular visit; there is no need for an emergency appointment over this.

How can I find out Madisonville’s current fluoride status for sure?

Ask Madisonville Water Department or TASS directly whether fluoride addition has stopped, and request the newest Consumer Confidence Report (water quality report). You can also check CDC My Water’s Fluoride, and watch for TASS’s next Water Quality Report covering 2025 data, which should be the first published source to reflect the change.

Sources

Tennessee Dental Authority is an independent consumer guide. This page is general information about drinking-water fluoridation, not medical or dental advice; decisions about fluoride supplements or treatments belong with your own dentist, who knows your teeth.

Last updated: October 20, 2026