Fluoride in Tullahoma, TN
One treatment plant serves all of Tullahoma: the Duck River Utility Commission’s Normandy Reservoir plant. It adds fluoride, and its measured levels sit right at the national recommendation.
Tullahoma’s water is fluoridated — right around the CDC target. The Duck River Utility Commission adds fluoride to every gallon Tullahoma Utilities Authority distributes, and TUA’s 2025 data reports a maximum of 0.75 mg/L, range 0.69–0.75 mg/L — straddling the CDC recommended 0.7 mg/L, and far below both EPA standards.
How this page works: the levels below come from TUA’s own published water quality report for the DRUC water it distributes, not from a marketing claim or a guess. New to the topic? Start with our full fluoride guide.
Water quality in Tullahoma
Curious about your tap water? Tennessee Water Authority has the full Tullahoma water quality guide — contaminant data, utility details, and filter recommendations.
Tullahoma’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 DRUC water (via TUA)
0.75 mg/L highest reported
Range 0.69–0.75 mg/L, TUA 2025 water quality data. The report gives a maximum and a range (no separate average). The range straddles the CDC 0.7 mg/L target — its top is slightly above it.
STATUS Fluoridated — adjusted
DRUC’s treatment narrative states: “Fluoride is also added to prevent tooth decay at the CDC/ADA recommended level of 0.7 parts per million.”
UTILITY TUA distributes, DRUC treats
Tullahoma Utilities Authority (TN0000715, ~29,952 served) runs the local system; the Duck River Utility Commission (TN0000821) treats every gallon.
SOURCE Normandy Reservoir
DRUC treats Normandy Reservoir water (Duck River) at its filtration plant. Corroboration: the same DRUC water measured up to 0.90 mg/L (range 0.61–0.90) in 2024 data published by a neighboring DRUC-water system.
How Tullahoma’s levels compare
A number by itself doesn’t tell you much. Here is Tullahoma’s reported range next to the three benchmarks that matter, each labeled for exactly what it is.
| Benchmark | Level | How Tullahoma compares |
|---|---|---|
| TUA / DRUC water, 2025 data | 0.75 mg/L max | Range 0.69–0.75 mg/L. Straddles the CDC target — the top is slightly above it, stated plainly. |
| CDC recommended level | 0.7 mg/L | Tullahoma’s reported range brackets this target; DRUC states it doses to this level. |
| EPA secondary (non-enforceable) standard | 2.0 mg/L | Tullahoma’s highest reported result 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 | Tullahoma’s highest reported result is about one-fifth of the legal limit. |
TUA’s table reports a maximum and a range rather than an average, so this page publishes exactly that — no average has been invented. The prior year’s DRUC-water data (maximum 0.90 mg/L, range 0.61–0.90) ran slightly higher and wider.
One plant, one number
Unlike most cities in this series, Tullahoma has a single supply chain: DRUC treats the water and TUA distributes it, so the level above describes Tullahoma Utilities Authority customers generally. (The water guide’s older name for the system, Tullahoma Board of Utilities, is the same utility — TN0000715.) Private wells are the exception — see below.
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.
So even with Tullahoma’s water at the CDC target: 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.
Tullahoma’s water sits at the CDC recommended level, so the water side of your fluoride picture is in good shape. Varnish is then a question of individual cavity risk: it remains worthwhile for kids and for adults with recent cavities, dry mouth, braces, or exposed tooth roots.
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 Coffee County, where a home can be minutes from a TUA 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 Tullahoma’s level yourself
Don’t take our word for it — the primary sources are public.
- Read TUA’s current water quality report. The 2025 report (PDF) lists fluoride at a maximum of 0.75 mg/L (range 0.69–0.75 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 TUA (TN0000715) and DRUC (TN0000821).
- Check whose name is on your bill. If your bill names a different utility — Manchester, for example, also buys DRUC water but is a separate system — that utility’s report governs your tap.
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. All of Tullahoma's water is treated by the Duck River Utility Commission (DRUC), which adds fluoride, and the Tullahoma Utilities Authority distributes it. TUA's 2025 water quality data reports fluoride at a maximum of 0.75 mg/L, with a range of 0.69–0.75 mg/L — right around the CDC recommended level of 0.7 mg/L.
The highest level reported in TUA's 2025 data is 0.75 mg/L, and every reported result fell between 0.69 and 0.75 mg/L. DRUC states it adds fluoride at the CDC/ADA recommended level of 0.7 mg/L, and the 2025 measurements sit right around that target — the top of the range is slightly above it. A year earlier, the same DRUC water measured up to 0.90 mg/L (range 0.61–0.90) in a neighboring system's report.
No. The CDC recommended level is 0.7 mg/L, so Tullahoma's reported range (0.69–0.75 mg/L) straddles the target rather than sitting far above it. The EPA standards are in a different league entirely: the secondary (non-enforceable) standard is 2.0 mg/L and the enforceable maximum contaminant level (MCL) is 4.0 mg/L. Tullahoma's highest reported result is about one-fifth of the legal limit.
The Duck River Utility Commission (DRUC) — a regional authority that treats Normandy Reservoir water and supplies Tullahoma, Manchester, and surrounding areas. TUA operates the local distribution system, tanks, and pumping stations; DRUC sets the fluoride level at its treatment plant. That is why this page's number comes from DRUC water data published in TUA's 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.
For many people, yes — varnish is a much stronger, targeted dose than tap water provides, and it remains worthwhile for kids and for adults at higher cavity risk: people with recent cavities, dry mouth, braces, or exposed roots. Tullahoma's water sits at the CDC target, so the water side of your fluoride picture is in good shape; varnish is about your individual cavity risk. 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 Coffee 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 TUA's current water quality report — the 2025 data is linked in the sources below, and fluoride is listed with its maximum and range. You can also check CDC's My Water's Fluoride, which tracks fluoridation status and levels by water system, including TUA (TN0000715) and DRUC (TN0000821).
Sources & method
- Tullahoma Utilities Authority, 2025 Water Quality Report — fluoride maximum 0.75 mg/L, range 0.69–0.75 mg/L; DRUC treatment narrative (“Fluoride is also added… at the CDC/ADA recommended level of 0.7 parts per million”); system TN0000715; tub.net 2025 report (PDF).
- Shelbyville Flat Creek Water System, 2025 Water Quality Report (2024 data) — same DRUC water, distributed through TUA: fluoride maximum 0.90 mg/L, range 0.61–0.90 mg/L; shelbyvillepower.com (PDF).
- Tennessee Water Authority, Tullahoma water quality guide — TUA TN0000715, 29,952 served, DRUC supply relationship; tennesseewaterauthority.com/tullahoma-tn-water-quality-guide.
- 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: Tullahoma’s level comes from TUA’s own published report on the DRUC water it distributes, corroborated against a second DRUC-water system’s report for the prior year. We never name, rank, or recommend private dental practices.