Fluoride in Farragut, TN Water: Yes, It's Fluoridated — at 0.546 mg/L
Farragut's main water utility adjusts fluoride in its Ft. Loudon Lake water, but its most recent report measured less than the CDC recommends. Here's the number, how it stacks up against the federal benchmarks, and what it means for toothpaste, kids, and anyone served by a different utility or a well.
Yes — Farragut's water is fluoridated. First Utility District of Knox County (FUD, TN0000369) practices adjusted fluoridation of its Ft. Loudon Lake surface water, and its 2025 Consumer Confidence Report measured 0.546 mg/L (range 0.338–0.700 mg/L) — below the CDC's recommended 0.7 mg/L, so fluoride toothpaste matters all the more here.
How to read this page: every Farragut figure comes from FUD's own 2025 Consumer Confidence Report — not from estimates or national averages. Units: the report lists fluoride in ppm; for drinking water, 1 ppm = 1 mg/L, and this page uses mg/L throughout. One caution up front: this page covers FUD customers only. Part of the Farragut area is also served by Lenoir City Utility Board (LCUB) — if that name is on your water bill, your fluoridation picture may be different. See which utility serves you below.
Water quality in Farragut
Curious about your tap water? Tennessee Water Authority has the full Farragut water quality guide — contaminant data, utility details, and filter recommendations.
The full picture: our complete fluoride guide
This page is the Farragut companion — the local number and what it means. For the statewide walkthrough (how fluoridation works, the safety evidence, filters that remove fluoride, and how Tennessee cities compare), see our complete fluoride guide.
Farragut's fluoride level, against the benchmarks
FUD practices adjusted fluoridation: its 2025 Consumer Confidence Report lists fluoride among the system's water additive sources — with the standard source language, a "water additive which promotes strong teeth" — the CDC Fluoridation Census classifies the system as adjusted, and its measured level sits in the adjusted range. The measured result in 2025 was 0.546 mg/L on average. That's real fluoridation, but it lands below the CDC's recommended level — worth knowing, because it changes how much of the work your toothpaste has to do.
| Measure | Level | What it is |
|---|---|---|
| Farragut (FUD) — measured level, 2025 | 0.546 mg/LRange 0.338–0.700 mg/L | What the utility's own testing actually found in the water during 2025 |
| CDC recommended level | 0.7 mg/L | The level U.S. public health agencies recommend for balancing cavity protection against fluorosis risk. FUD's average sits below this — only the top of its reported range reaches it |
| EPA secondary standard | 2.0 mg/L | A non-enforceable guideline aimed at preventing cosmetic dental fluorosis (mottling) in children |
| EPA maximum contaminant level (MCL) | 4.0 mg/L | The enforceable legal ceiling for fluoride in public drinking water. FUD's result is roughly one-seventh of it — no violation |
Don't confuse the three federal numbers — they're often scrambled in online discussions. 0.7 mg/L is the CDC's recommendation (the target for cavity prevention). 2.0 mg/L is the EPA's secondary standard (a guideline about cosmetic effects). 4.0 mg/L is the EPA's enforceable maximum. Farragut's 0.546 mg/L is below the first and far below the other two.
What 0.546 mg/L means for your teeth
Fluoridated water at a below-target level is still working for you — every glass delivers a small background dose that helps remineralize enamel. But at 0.546 mg/L instead of 0.7, the background dose is thinner, which makes the things you control — toothpaste, kids' brushing habits, and in-office treatments for cavity-prone teeth — carry more of the load.
01 Toothpaste is the main event
Water is background exposure; toothpaste is the main event. Brushing puts a concentrated dose of fluoride directly on the enamel surface, twice a day — that's where most cavity protection actually comes from, in Farragut and everywhere else.
So yes, you still need fluoride toothpaste twice daily even though your tap water is fluoridated. Skipping it because "the water has fluoride" gives up the strongest protection you have — and in Farragut, where the water runs below the recommended level, that trade is worse than average.
02 Kids: small amounts, supervised
Children need fluoride toothpaste too — in the right amount. The ADA's guidance: a rice-grain smear for children under age 3, and a pea-size amount from age 3 up.
Supervise brushing and teach kids to spit, not swallow. Young children who swallow toothpaste day after day can take in more fluoride than they need while their permanent teeth are still forming — the amounts above are sized to prevent exactly that while still protecting the teeth.
03 Fluoride varnish: still useful — arguably more so here
If you or your child is cavity-prone — new cavities keep appearing, or there are risk factors like dry mouth or a history of decay — in-office fluoride varnish is still useful even with fluoridated water at home. It delivers a much stronger, longer-lasting dose than either water or toothpaste.
And in Farragut the case is arguably stronger than in a town at the full 0.7 mg/L target, because your teeth get a thinner background dose from the water to begin with. Varnish won't be equally necessary for everyone — a patient who never gets cavities gains less than one fighting new decay every year — but for cavity-prone patients it's one of the cheapest, easiest reinforcements available. Your dentist can tell you which side of that line your family is on.
04 On a private well? Different rules
Private wells are not fluoridated by any utility — whatever fluoride is in well water is whatever occurs naturally in the ground, which varies and is usually low.
If your home is on a well, get the water tested before even thinking about fluoride supplements. Supplements dosed without knowing the water's natural level can overshoot, and they should only ever be used on professional advice — a dentist's or pediatrician's — never as a guess.
First, check whose name is on your water bill
Everything above describes First Utility District of Knox County — FUD (TN0000369), which treats Ft. Loudon Lake surface water and serves most of Farragut. But the Farragut area isn't one water system. Part of the area is also served by Lenoir City Utility Board (LCUB) — and each utility makes its own fluoridation decision.
Different utility, possibly different answer
We verified FUD's status and level from its own 2025 report. We did not verify LCUB's fluoridation status or level for this page, and we won't extend FUD's figures to LCUB customers or guess at LCUB's. If your bill names Lenoir City Utility Board, treat this page's numbers as not yours and check LCUB's own Consumer Confidence Report instead — the steps below work for any utility.
A note on the local debate — an unenacted proposal
A Knox County ordinance to prohibit fluoridation was proposed in June 2025; no enactment was found. It is an unenacted proposal, not a change in the water — FUD's fluoridation, and the 0.546 mg/L figure above, stand as reported in the 2025 Consumer Confidence Report.
How to confirm it yourself
Don't take our word for it — the primary document is public, and checking it takes two minutes.
- Read FUD's Consumer Confidence Report. FUD's 2025 Consumer Confidence Report lists fluoride at 0.546 mg/L, range 0.338–0.700 mg/L, and counts fluoride among the system's water additives. A new report is published each year — next year's is the one to watch for changes.
- Check CDC My Water's Fluoride. The CDC's My Water's Fluoride database tracks fluoridation status by water system and county — a good cross-check, and the place to look up a different utility if your bill names Lenoir City Utility Board.
- On a different utility? Find that utility's own Consumer Confidence Report (utilities must make it available to customers annually) and look for the fluoride row: the level detected, the range, and whether the utility describes adjusting or adding fluoride.
- On a private well? No report exists — your water is yours to test. A certified lab test for fluoride tells you the natural level before you and your dentist or pediatrician discuss whether anything more is needed.
Questions people actually ask us
The real questions from the chair — answered straight, with Farragut's actual numbers.
Yes. First Utility District of Knox County (FUD, TN0000369), which serves most of Farragut with Ft. Loudon Lake surface water, practices adjusted fluoridation. FUD's 2025 Consumer Confidence Report lists fluoride among its water additive sources — described as a "water additive which promotes strong teeth" — and the CDC Fluoridation Census classifies the system as adjusted. Its measured level, 0.546 mg/L, also sits in the adjusted range.
FUD's 2025 Consumer Confidence Report measured 0.546 mg/L, with individual results ranging from 0.338 to 0.700 mg/L. That is below the CDC's recommended level of 0.7 mg/L — the top of FUD's reported range reaches it, but the average does not — and far below the EPA's secondary standard of 2.0 mg/L and enforceable maximum (MCL) of 4.0 mg/L.
Yes — arguably more so here. Think of the water as background exposure and toothpaste as the main event: toothpaste puts a concentrated dose of fluoride directly on the enamel, twice a day, which is where most cavity protection comes from. Because Farragut's water runs below the CDC's 0.7 mg/L target, the background dose is thinner than average, so brushing twice daily with fluoride toothpaste matters all the more. Do not add fluoride supplements on your own to make up the difference; that is a decision to make with a dentist or pediatrician.
Children need fluoride toothpaste too — in the right amount. The ADA's guidance: a rice-grain smear for children under age 3, and a pea-size amount from age 3 up. Supervise brushing and teach kids to spit rather than swallow, so young children don't take in more fluoride than they need while their permanent teeth are still forming. For cavity-prone kids, in-office fluoride varnish is also still useful — arguably more so in Farragut, where the water sits below the recommended level.
Private wells are not fluoridated by any utility — whatever fluoride is in well water is whatever occurs naturally in the ground, which varies and is usually low. Get your well water tested before considering fluoride supplements, and only use supplements on a dentist's or pediatrician's advice. Dosing supplements without knowing your water's natural level can overshoot.
Then this page's numbers are not yours. Part of the Farragut area is also served by Lenoir City Utility Board (LCUB), and we did not verify LCUB's fluoridation status or level for this page — we won't extend FUD's figures to LCUB customers or guess at LCUB's. Check the fluoride row in LCUB's own Consumer Confidence Report, or look the system up in CDC My Water's Fluoride. Start with the name on your water bill: that's the utility whose report applies to your tap.
Sources
- First Utility District of Knox County — 2025 Consumer Confidence Report: fluoride measured at 0.546 mg/L, range 0.338–0.700 mg/L; fluoride listed among the system's water additive sources ("water additive which promotes strong teeth"); MCL/MCLG 4.0 mg/L. fudknox.org/wp-content/uploads/2025-CCR-Full-Size-1.pdf (accessed October 20, 2026). Primary source for Farragut's status and level.
- CDC Fluoridation Census (U.S. Department of Health & Human Services): classifies First Utility District of Knox County (TN0000369) as adjusted fluoridation.
- CDC — community water fluoridation: recommended fluoride level for drinking water, 0.7 mg/L. Cross-check any system's status in CDC My Water's Fluoride.
- U.S. EPA — National Primary and Secondary Drinking Water Regulations: fluoride enforceable maximum contaminant level (MCL) 4.0 mg/L; secondary standard 2.0 mg/L.
- American Dental Association: fluoride toothpaste amounts for children — rice-grain smear under age 3, pea-size amount from age 3.