Fluoride in La Vergne, TN
La Vergne treats its own Percy Priest Lake water and adds fluoride at the plant. Its own 2025 report puts the level in a range that never reaches the CDC target — here is the number, honestly presented, and what it means for your teeth.
La Vergne’s water is fluoridated. The city adds fluoride at its Percy Priest Lake plant, and its 2025 report puts fluoride in a range of 0.437–0.658 mg/L — below the CDC recommended 0.7 mg/L at every reading, and far below both EPA standards. The report’s average wasn’t legible, so none is published here.
How this page works: the level below comes from the utility’s own published Consumer Confidence Report, not from a marketing claim or a guess. Where that document’s own text defeated us — its average — we say so instead of inventing one. New to the topic? Start with our full fluoride guide.
Water quality in La Vergne
Curious about your tap water? Tennessee Water Authority has the full La Vergne water quality guide — contaminant data, utility details, and filter recommendations.
La Vergne’s fluoride, by utility
Everything on this page traces back to these facts, from each utility’s own published water quality report.
LEVEL Fluoride in La Vergne water, 2025
0.437–0.658 mg/L
Range across 2025 in the utility’s own Consumer Confidence Report. Below the CDC recommended 0.7 mg/L at every reading — stated plainly. The report’s text layer interleaves its columns, so no average is published here; the range is the verified figure.
STATUS Fluoridated — adjusted
The city adds fluoride at its treatment plant. The plant’s own page: “Fluoride is added for dental health.” The CCR lists the source as an additive to promote strong teeth.
UTILITY La Vergne Water System
PWSID TN0000386. Managed by Inframark for the City of La Vergne. Serves about 38,243 people.
SOURCE Percy Priest Lake
Surface water drawn from Percy Priest Lake and treated at the city’s own plant — independently from Smyrna, which shares the lake.
How the levels compare
A number by itself doesn’t tell you much. Here are the verified figures next to the three benchmarks that matter, each labeled for exactly what it is.
| Benchmark | Level | How it compares |
|---|---|---|
| La Vergne Water System range, 2025 | 0.437–0.658 mg/L | Every 2025 reading in the utility’s report. No average is published — see the note below the table. |
| CDC recommended level | 0.7 mg/L | La Vergne runs below this at every reading — even its highest, 0.658 mg/L. We won’t round it up to the target. |
| EPA secondary (non-enforceable) standard | 2.0 mg/L | La Vergne 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 | La Vergne is far below the legal limit. |
Why no average? The 2025 CCR’s PDF text interleaves its table columns, and the fluoride row’s average could not be separated reliably from neighbouring rows. Rather than guess at a number we can’t tie to fluoride, this page publishes the row’s verified range only.
La Vergne is not the only system at a La Vergne address
ZIP 37086 also touches Gladeville Utility District, Smyrna Water System, and Nashville Metro Water Services — separate systems, separately treated, with their own levels. La Vergne and Smyrna share Percy Priest Lake but not a treatment plant. Check your water bill for your utility’s name before assuming this page’s range is your range.
Do you still need fluoride toothpaste?
Yes — and this is the point people most often get backwards.
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.
That holds in La Vergne, where the water runs below the CDC target at every reading: 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 La Vergne’s below-target range, varnish remains worthwhile for kids and for adults at higher cavity risk: people with recent cavities, dry mouth, braces, or exposed tooth roots. The water gives you a partial base layer, and varnish tops it up exactly where a clinician can see it’s needed.
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 in Rutherford County, where a home can be minutes from a city 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 La Vergne’s level yourself
Don’t take our word for it — the primary sources are public.
- Read the utility’s current Consumer Confidence Report. The La Vergne 2025 Consumer Confidence Report (PDF) lists fluoride with its 2025 range (0.437–0.658 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. It covers the La Vergne Water System (TN0000386).
- Check whose name is on your bill. If your bill names Gladeville Utility District, Smyrna, or Nashville Metro Water Services, that system’s report governs your tap — not this page’s range.
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. The City of La Vergne adds fluoride at its Percy Priest Lake treatment plant — the city's water treatment plant page states it plainly: fluoride is added for dental health. The La Vergne Water System's 2025 Consumer Confidence Report puts fluoride in a range of 0.437–0.658 mg/L across the year.
The utility's 2025 report gives a range of 0.437–0.658 mg/L. This page does not publish an average: the report PDF's text interleaves its table columns, and the fluoride row's average could not be separated reliably from the rows around it. The range is the verified figure, and every reading in it sits below the CDC recommended 0.7 mg/L.
It is below the CDC recommended level of 0.7 mg/L — even the highest 2025 reading, 0.658 mg/L, does not reach the target, and this page states that plainly rather than rounding it up. It is still far below both EPA standards: the secondary (non-enforceable) standard is 2.0 mg/L and the enforceable maximum contaminant level (MCL) is 4.0 mg/L. Brushing twice daily with fluoride toothpaste covers the rest of what your teeth need.
Not necessarily. Addresses in and around ZIP 37086 can also sit on Gladeville Utility District, Smyrna Water System, or Nashville Metro Water Services — separate systems with their own fluoride levels. La Vergne and Smyrna draw from the same lake, Percy Priest, but they treat their water independently. Check whose name is on your water bill — that utility's report is the one that governs your tap.
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.
For many people, yes. La Vergne's water runs below the CDC recommended level at every 2025 reading, so the water alone is not the full story. An in-office fluoride treatment or varnish puts a much stronger dose directly on the teeth, and 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 Rutherford 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 the utility's current Consumer Confidence Report — the 2025 report is linked in the sources below, and fluoride is listed with its range. You can also check CDC's My Water's Fluoride, which tracks fluoridation status and levels by water system, including the La Vergne Water System (TN0000386). If your bill names a different system, that system's report governs your tap.
Sources & method
- City of La Vergne, Consumer Confidence Report 2025 (Inframark) — fluoride range 0.437–0.658 ppm, MCL/MCLG 4 ppm, source an additive to promote strong teeth; system TN0000386; lavergnetn.gov/DocumentCenter/View/5332/2025-Water-Quality-Report-PDF. Readability caveat: the PDF’s text interleaves table columns; the row’s average could not be separated reliably, so none is published.
- City of La Vergne, Water Treatment Plant page — “Fluoride is added for dental health”; lavergnetn.gov/251/Water-Treatment-Plant.
- EWG Tap Water Database (cross-check) — fluoride listed among contaminants detected for the La Vergne Water System (TN0000386); no EWG figure is used on this page.
- 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: La Vergne’s status comes from the city’s own treatment-plant page (“fluoride is added for dental health”) and its level from the utility’s own 2025 report — range only, because that document’s average could not be read reliably. We never name, rank, or recommend private dental practices.