Fluoride in Fayetteville, TN
Fayetteville Public Utilities treats Elk River water for Fayetteville and much of Lincoln County — and its fluoride sits almost exactly on the CDC target. Here is the verified record, including the year it didn’t.
Fayetteville’s water is fluoridated — almost exactly at the recommended level. Fayetteville Public Utilities adjusts fluoride in its Elk River water, and its 2025 report puts the average at 0.703 mg/L (range 0.62–0.74 mg/L) — essentially at the CDC recommended 0.7 mg/L, and far below both EPA standards.
How this page works: the level below comes from Fayetteville Public Utilities’ own published 2025 water quality report, not from a marketing claim or a guess. Fayetteville is one of the few systems in this series running right at the CDC target — and its prior-year report ran lower, which this page shows too, because one good year is a data point, not a promise. New to the topic? Start with our full fluoride guide.
Water quality in Fayetteville
Curious about your tap water? Tennessee Water Authority has the full Fayetteville water quality guide — contaminant data, utility details, and filter recommendations.
Fayetteville’s fluoride, in one card
Everything on this page traces back to these facts, from Fayetteville Public Utilities’ 2025 Annual Water Quality Report.
LEVEL Fluoride in FPU water
0.703 mg/L average
Range 0.62–0.74 mg/L across quarterly samples in 2025. Essentially at the CDC recommended 0.7 mg/L.
STATUS Fluoridated — adjusted
FPU’s report lists fluoride’s source as “water additive which promotes strong teeth” (alongside natural deposits and industrial discharge) — the utility adjusts fluoride as part of treatment.
UTILITY Fayetteville Public Utilities
PWSID TN0000764. Serves about 14,200 people in Fayetteville and Lincoln County. Lincoln County Utility District (TN0000242, ~8,400) purchases treated water from FPU; Flintville UD and Metro Lynchburg / Lincoln County UD purchase surface water from regional suppliers.
SOURCE Elk River
FPU draws surface water from the Elk River, with Teal Hollow Springs held as an emergency groundwater source.
How 0.703 mg/L compares
A number by itself doesn’t tell you much. Here is Fayetteville’s level next to the three benchmarks that matter, each labeled for exactly what it is.
| Benchmark | Level | How Fayetteville compares |
|---|---|---|
| Fayetteville Public Utilities, 2025 | 0.703 mg/L avg | Range 0.62–0.74 mg/L across quarterly samples. Essentially at the CDC recommended level. |
| CDC recommended level | 0.7 mg/L | Fayetteville meets this — 0.703 mg/L is, for practical purposes, the target itself. Few systems in this series land this close. |
| EPA secondary (non-enforceable) standard | 2.0 mg/L | Fayetteville is far below this guideline, which is aimed at preventing cosmetic effects like tooth discoloration. |
| EPA enforceable maximum contaminant level (MCL) | 4.0 mg/L | Fayetteville is far below the legal limit. |
The prior year ran lower: FPU’s 2024 report put fluoride at 0.578 mg/L average (range 0.56–0.60 mg/L) — below target. The 2025 figure is the current one; the pair shows the level can move year to year, which is why the newest report is the one to trust.
Lincoln County is not one water system
FPU’s 0.703 mg/L describes FPU customers and Lincoln County Utility District, which purchases FPU-treated water. Flintville Utility District and Metro Lynchburg / Lincoln County Utility District purchase surface water from regional suppliers — the guide does not tie their supply to FPU’s plant, so this page does not assign them FPU’s figure. Check your water bill for your utility’s name before assuming this page’s number is your number.
Do you still need fluoride toothpaste?
Yes — and this is the point people most often get backwards.
Yes — even here, where the water sits right at the recommended level. Fluoridated drinking water is background exposure. Every glass of water bathes your teeth in a low level of fluoride, and that steady, low-level contact genuinely helps enamel resist acid. But it is a base layer, not the main event. Fluoride toothpaste delivers a much more concentrated dose directly onto the enamel, twice a day, right where decay starts.
So even in a fluoridated city at the target — and Fayetteville is one, at 0.703 mg/L — brush twice daily with fluoride toothpaste. If you have been skipping fluoride toothpaste because “it’s in the water anyway,” the water was never carrying that load on its own.
Fluoride and kids: the amounts matter
Young children swallow toothpaste, so the ADA’s guidance is about using the right small amount — not about avoiding fluoride toothpaste.
UNDER 3 A rice-grain smear
For children under age 3, use a smear of fluoride toothpaste about the size of a grain of rice. That tiny amount is deliberate — it protects the teeth while keeping what gets swallowed to a minimum.
AGES 3+ A pea-size amount
From age 3 up, a pea-size amount is enough. A ribbon of paste running the length of the brush is several times more than a child needs.
- Supervise brushing. An adult should be watching (and helping) until a child can reliably spit and rinse on their own.
- Teach spitting, not swallowing. Spit the toothpaste out when done; swallowing it as a habit is what the small amounts are designed to guard against.
- Don’t load the brush. More paste does not mean cleaner teeth — it mostly means more swallowed.
What about fluoride varnish at the dentist?
An in-office fluoride treatment or varnish is a much stronger, targeted dose than anything in tap water or toothpaste.
At Fayetteville’s 0.703 mg/L, the water is doing its full background job — so varnish here is less about compensating for the water and more about individual cavity risk. It remains worthwhile for kids and for adults at higher risk: people with recent cavities, dry mouth, braces, or exposed tooth roots. An in-office treatment puts a much stronger dose directly on the teeth than any tap can.
If your cavity risk is low, it’s also reasonable to ask your dentist to walk you through your risk before a treatment — in either direction, the decision should be explained, not automatic.
On a private well? None of this applies automatically
Well water is not fluoridated by any utility
Nobody adjusts the fluoride in a private well — or tests it, unless you do. Well water may carry naturally occurring fluoride, almost none, or more than you’d expect, and taste won’t tell you. This matters across Lincoln County’s rural areas, where a home can be minutes from an FPU main and not connected to it. Test your well water before assuming what’s in it, and tell your dentist you’re on well water so your fluoride plan is built on your actual water, not the city’s.
How to confirm Fayetteville’s level yourself
Don’t take our word for it — the primary sources are public.
- Read FPU’s current water quality report. The 2025 report lists fluoride at 0.703 mg/L average (range 0.62–0.74 mg/L). A new report comes out each year; the newest one is the one to trust.
- Check CDC’s My Water’s Fluoride. The CDC’s system-by-system tracker at nccd.cdc.gov/DOH_MWF lists fluoridation status and levels for community water systems, including Fayetteville Public Utilities (TN0000764).
- Check whose name is on your bill. If your bill names Flintville UD or Metro Lynchburg / Lincoln County UD, ask that system for its supply source and report — FPU’s figure governs FPU and Lincoln County UD taps.
For the bigger picture — how fluoridation works, the arguments on both sides, and how to think about filters — see our full fluoride guide.
Questions people actually ask
Asked the way people actually ask them — answered from the sources cited below.
Yes. Fayetteville Public Utilities (FPU) adjusts the fluoride in the water it treats from the Elk River, and its 2025 water quality report lists fluoride's source as a water additive which promotes strong teeth. Lincoln County Utility District purchases FPU-treated water, so its customers receive the same fluoridated water.
FPU's 2025 report puts the average at 0.703 mg/L, with a range of 0.62–0.74 mg/L across quarterly samples. That is essentially exactly the CDC recommended level of 0.7 mg/L. The prior year's report ran lower — 0.578 mg/L average (range 0.56–0.60) — so the level has moved up to the target in the most recent report.
It is the recommended amount, as closely as a real system lands on it. The CDC recommended level is 0.7 mg/L, and FPU's 0.703 mg/L average is effectively that target. It is far below the EPA limits — the enforceable maximum contaminant level (MCL) is 4.0 mg/L and the secondary (non-enforceable) standard is 2.0 mg/L — so there is a wide margin between Fayetteville's level and any regulatory concern.
If your bill names Lincoln County Utility District, yes — it purchases treated water from FPU, so FPU's 0.703 mg/L describes your tap. If your bill names Flintville Utility District or Metro Lynchburg / Lincoln County Utility District, those systems purchase surface water from regional suppliers and the guide does not tie their supply to FPU's plant, so we don't assign them FPU's figure. Check your bill and ask your utility for its report.
Yes. Fluoridated drinking water is background exposure — it bathes your teeth in a low level of fluoride through the day, which helps, but it does not replace the concentrated fluoride that toothpaste delivers directly to the enamel while you brush. Brush twice a day with fluoride toothpaste, and treat the water as a helpful base layer, not the whole defense.
The ADA's guidance: for children under age 3, use a smear of fluoride toothpaste about the size of a grain of rice. For ages 3 and up, a pea-size amount is enough. Supervise brushing, teach your child to spit the toothpaste out rather than swallow it, and remember that more paste on the brush does not mean cleaner teeth — the small amounts are deliberate, because young kids swallow some no matter what.
It depends on your cavity risk more than on the water. Fayetteville's water at 0.703 mg/L already sits at the CDC recommended level, so varnish here is about individual risk, not compensating for the water. It remains worthwhile for kids and for adults at higher cavity risk — people with recent cavities, dry mouth, braces, or exposed roots. If your cavity risk is low, ask your dentist to explain your risk either way rather than accepting or skipping it on autopilot.
No utility fluoridates private well water — nobody adjusts it at all. Well water can contain some naturally occurring fluoride, a lot, or almost none, and you cannot tell by taste. If your home is on a well in Lincoln County, have the water tested before assuming anything about its fluoride level, and tell your dentist you are on well water so your fluoride plan reflects it.
Start with Fayetteville Public Utilities' current water quality report — the 2025 report is linked in the sources below, and fluoride is listed with its average and range. You can also check CDC's My Water's Fluoride, which tracks fluoridation status and levels by water system. Note: searches also return a Fayetteville, North Carolina water report — a different state's system whose figures do not describe Fayetteville, Tennessee.
Sources & method
- Fayetteville Public Utilities, 2025 Annual Water Quality Report — fluoride 0.703 mg/L average, range 0.62–0.74 mg/L, quarterly samples, source “water additive which promotes strong teeth”; source water Elk River; system TN0000764; wqr.fpu-tn.com.
- Fayetteville Public Utilities, prior-year water quality report (2024 data) — fluoride 0.578 mg/L average, range 0.56–0.60 mg/L, cited for the year-to-year comparison in the table note.
- Tennessee Water Authority, Fayetteville water quality guide — four-utility structure, PWSIDs, purchasing relationships, and served populations; its transcription of the same FPU 2025 CCR agrees with the report above; tennesseewaterauthority.com/fayetteville-tn-water-quality-guide.
- EWG Tap Water Database (cross-check) — system TN0000764 is the Lincoln County Board of Public Utilities system that operates FPU; no numeric EWG fluoride value was retrievable, so no EWG figure is published here. Figures published for Fayetteville, North Carolina — a different state’s system that appears in the same searches — were deliberately excluded.
- CDC — recommended fluoride level of 0.7 mg/L for community water systems; fluoridation status and levels are also tracked in CDC’s My Water’s Fluoride.
- EPA — enforceable maximum contaminant level (MCL) of 4.0 mg/L and secondary (non-enforceable) standard of 2.0 mg/L for fluoride in drinking water.
- American Dental Association (ADA) — children’s toothpaste amounts: a rice-grain smear under age 3, a pea-size amount at ages 3 and up, with supervised brushing.
Method in one line: Fayetteville’s level comes from FPU’s own published 2025 water quality report, with the prior year’s report shown for honest year-to-year context. Purchasing systems are assigned FPU’s figure only where the supply relationship is documented (Lincoln County UD). We never name, rank, or recommend private dental practices.