Fluoride in Maryville, TN Water: 0.213 mg/L on Average — and No Confirmation It's Still Added
Maryville adjusted the fluoride in its drinking water for decades, but its current report measures an average of just 0.213 mg/L — well below the CDC's recommended 0.7 mg/L — and never says whether the city still adds fluoride at all. Here's the number, how it stacks up against the federal benchmarks, and what it means for toothpaste, kids, and anyone on a different utility or a well.
Maryville historically fluoridated its water. The City of Maryville — through its Department of Water Quality Control — treated Little River surface water and adjusted the fluoride in it, and federal records show the practice dating to 1959. But the current report tells a different story about the level: the City of Maryville Water Quality Report 2026 (2025 Water Quality Data) lists fluoride at an average of 0.213 mg/L (range 0.15–0.28) — well below the CDC recommended level of 0.7 mg/L — and it never states whether the city still adds fluoride. So treat the tap water as a small background source, and let fluoride toothpaste do the heavy lifting.
Water quality in Maryville
Curious about your tap water? Tennessee Water Authority has the full Maryville water quality guide — contaminant data, utility details, and filter recommendations. Read the Maryville water quality guide.
How to read this page: every Maryville figure comes from the City of Maryville Water Quality Report 2026 (2025 Water Quality Data) — not from estimates or national averages. Units: water reports often list fluoride in ppm; for drinking water, 1 ppm = 1 mg/L, and this page uses mg/L throughout. One caution up front: the 0.213 mg/L average describes City of Maryville customers. Parts of the wider Maryville area are served by other systems with their own levels — see which utility serves you below.
The full picture: our complete fluoride guide
This page is the Maryville 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.
Maryville's fluoride level, against the benchmarks
The City of Maryville Water Quality Report 2026 (2025 Water Quality Data) gives the fluoride row in full: Level Found 0.213 mg/L, Range 0.15–0.28 mg/L — with the level defined as the average of quarterly compliance samples. We'll say it plainly: that is well below the CDC recommended level of 0.7 mg/L, and far below both EPA standards. It is also far below where Maryville's water used to run: the most recent older legible figure, from the city's 2016 report covering 2015 data, was a maximum of 0.84 mg/L (range 0.41–0.84) — the band you'd expect from a system adjusting fluoride. The current report measures the level but does not confirm whether the city still adds fluoride, so this page reports the verified number and leaves the practice itself an open question.
| Measure | Level | What it is |
|---|---|---|
| City of Maryville — reported average, 2025 | 0.213 mg/L | The average of quarterly compliance samples in the City of Maryville Water Quality Report 2026; measured range 0.15–0.28 mg/L |
| CDC recommended level | 0.7 mg/L | The level U.S. public health agencies recommend for balancing cavity protection against fluorosis risk. Maryville's measured average sits well below this — roughly a third of it |
| EPA secondary (non-enforceable) standard | 2.0 mg/L | A non-enforceable guideline aimed at preventing cosmetic dental fluorosis (mottling) in children. Maryville is far below it |
| EPA enforceable maximum contaminant level (MCL) | 4.0 mg/L | The enforceable legal ceiling for fluoride in public drinking water. Maryville's level is a small fraction 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 recommended level (the target for cavity prevention). 2.0 mg/L is the EPA secondary (non-enforceable) standard (a guideline about cosmetic effects). 4.0 mg/L is the EPA enforceable maximum contaminant level (MCL). Maryville's 0.213 mg/L average is well below the first and far below the other two.
A word on the debate, honestly: whether communities should fluoridate water at all is a live public argument, and reasonable people land on different sides of it. What isn't in dispute is the arithmetic on this page — Maryville's measured level now sits well below the level public-health agencies recommend for cavity prevention and far below the levels federal safety standards are built around. Our job is to give you the verified local number so you can make your own calls — about toothpaste, filters, and treatments — with real figures in hand.
What 0.213 mg/L means for your teeth
At an average of 0.213 mg/L, Maryville's water still delivers a small background dose of fluoride with every glass — but it's roughly a third of the CDC recommended level, and the city's report doesn't confirm fluoride is still being added at all. That makes the things you control — toothpaste, kids' brushing habits, and in-office treatments for cavity-prone teeth — carry most of the load.
01 Do you still need fluoride toothpaste?
Yes. 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 Maryville and everywhere else.
So keep brushing twice daily with fluoride toothpaste. Skipping it because "the water has fluoride" gives up the strongest protection you have — and in Maryville, where the measured level runs at roughly a third of the recommended level, that trade makes even less sense.
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 for ages 3 and 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: matters more at a low level
At an average of 0.213 mg/L — roughly a third of the CDC recommended level, from a supply whose fluoridation status the current report doesn't confirm — in-office fluoride varnish matters more, not less, for kids and adults at higher cavity risk. It delivers a much stronger, longer-lasting dose than either water or toothpaste.
The honest framing: with so little fluoride confirmed in the water, varnish is no longer a small top-up on an already-adequate background — for cavity-prone teeth it may be carrying real weight. For teeth that never get cavities, it's still a modest gain. Your dentist can tell you which side of that line your family is on.
04 On a private well? Different rules
Well water is not fluoridated by any utility — whatever fluoride is in it is whatever occurs naturally in the ground, which varies and is usually low. No city report covers it.
If your home is on a well, get the water tested before assuming anything about its fluoride level — and before even thinking about fluoride supplements. Supplements dosed without knowing the water's natural level can overshoot, and they should only ever be used with a dentist's or pediatrician's input — never as a guess.
First, check whose name is on your water bill
Everything above describes the City of Maryville system, run by the Maryville Department of Water Quality Control. But "the Maryville area" isn't one water system. Parts of the wider area are served by other systems — and each one has its own fluoridation decision and its own measured level.
Neighboring systems, different numbers
- South Blount County Utility District: 0.71 mg/L average
- City of Alcoa: 0.51 mg/L average
- City of Maryville: 0.213 mg/L average (this page)
The levels differ from system to system — and the 0.213 mg/L average on this page describes City of Maryville customers only. Check the utility name on your water bill before assuming any number is yours.
How to confirm it yourself
Don't take our word for it — the primary document is public, and checking it takes two minutes.
- Confirm directly with the City of Maryville water department whether it still adds fluoride. The current report measures the level but never states whether the practice continues — the water department is the only source that can settle it, so ask them first.
- Read Maryville's current water quality report. The City of Maryville Water Quality Report 2026 (2025 Water Quality Data) lists fluoride at a Level Found of 0.213 mg/L, range 0.15–0.28 — the average of quarterly compliance samples. A new report comes out each year, so 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 South Blount or Alcoa.
- 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 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 Maryville's actual numbers.
Historically, yes — the City of Maryville's Department of Water Quality Control treated Little River surface water and adjusted the fluoride in it, and federal records show Maryville fluoridated its water from 1959. Whether it still does is unconfirmed: the City of Maryville Water Quality Report 2026 (2025 Water Quality Data) measures fluoride at an average of 0.213 mg/L but never states whether the city still adds it. Confirm directly with the City of Maryville water department whether it still adds fluoride.
An average of 0.213 mg/L (range 0.15–0.28 mg/L), according to the City of Maryville Water Quality Report 2026 (2025 Water Quality Data), where the level is defined as the average of quarterly compliance samples. That is well below the CDC recommended level of 0.7 mg/L, and far below the EPA secondary (non-enforceable) standard of 2.0 mg/L and the EPA enforceable maximum contaminant level (MCL) of 4.0 mg/L.
No — not on its own. At 0.213 mg/L, Maryville's measured level is roughly a third of the CDC recommended level of 0.7 mg/L. The water still contributes some background exposure, but at this level fluoride toothpaste twice a day is doing nearly all of the protective work. Don't add fluoride supplements on your own to close the gap; that is a decision to make with a dentist or pediatrician.
Yes — especially at Maryville's current measured level. 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 of the cavity protection comes from. At an average of 0.213 mg/L in the water, that daily toothpaste dose matters more, not less. Brush twice daily with fluoride toothpaste.
Per ADA guidance: a rice-grain smear of fluoride toothpaste for children under age 3, and a pea-size amount for ages 3 and up. Supervise brushing, teach kids to spit the toothpaste out rather than swallow it, and keep the tube out of reach between brushings.
Quite possibly, yes — more so than when Maryville's water ran higher. The current measured average is 0.213 mg/L, roughly a third of the CDC recommended level, and the report doesn't confirm the city still adds fluoride at all — so the background protection from tap water is small and uncertain. For kids and adults at higher cavity risk, professional fluoride varnish delivers a much stronger dose than water or toothpaste and is a sensible reinforcement. If cavities keep showing up, varnish is one of the simplest reinforcements available; ask your dentist where you or your child falls.
This page's 0.213 mg/L average is for City of Maryville customers only. Parts of the wider Maryville area are served by other systems with their own verified levels: South Blount County Utility District measures 0.71 mg/L on average, and the City of Alcoa measures 0.51 mg/L on average. Check the utility name on your water bill before assuming a number is yours. And private wells are not fluoridated by any utility — if your home is on a well, have the water tested before assuming anything about its fluoride level.
Sources
- City of Maryville — Water Quality Report 2026 (2025 Water Quality Data): fluoride Level Found 0.213 mg/L — the average of quarterly compliance samples — range 0.15–0.28 mg/L. The report measures the level but does not state whether the city still adds fluoride. Primary source for Maryville's level.
- City of Maryville — 2016 water quality report (2015 data): fluoride maximum 0.84 mg/L, range 0.41–0.84 mg/L — the most recent older legible figure, from the era when the city was adjusting fluoride.
- Federal fluoridation records: Maryville fluoridated its water from 1959. Cross-check any system's status in CDC My Water's Fluoride.
- CDC — community water fluoridation: CDC recommended level for drinking water, 0.7 mg/L.
- U.S. EPA — National Primary and Secondary Drinking Water Regulations: fluoride EPA enforceable maximum contaminant level (MCL) 4.0 mg/L; EPA secondary (non-enforceable) standard 2.0 mg/L.
- American Dental Association: fluoride toothpaste amounts for children — rice-grain smear under age 3, pea-size amount ages 3 and up.