Fluoride in Jacksboro, TN Water: Two Supplies, Two Answers
Jacksboro's water comes from two different supplies, and they don't match on fluoride. One is fluoridated; the other has none added. The only way to know your answer is to know which supply reaches your tap.
Jacksboro has two answers. If your home is on the Cove Lake plant supply, your water is fluoridated — CJUC adds fluoride at about 0.7 mg/L. If you're on the Stony Fork Wells supply, your water has no added fluoride. Which supply feeds your address decides your answer — and only CJUC can tell you which one you have.
Water quality in Jacksboro
Curious about your tap water? Tennessee Water Authority has the full Jacksboro water quality guide — contaminant data, utility details, and filter recommendations.
How to read this page: Jacksboro is served by the Caryville-Jacksboro Utilities Commission (CJUC), PWSID TN0000322, serving about 11,060 people in Campbell County from two supplies: the Cove Lake water plant on Norris Lake (surface water) and the Stony Fork Wells (groundwater). Every CJUC figure here comes from the commission's own 2025 Water Quality Report — its Consumer Confidence Report. Units: the report lists fluoride in parts per million; for drinking water, 1 ppm = 1 mg/L, and this page uses mg/L throughout. One caution that runs through everything below: do not assume your neighbor's answer is yours — the two supplies give opposite answers.
The full picture: our complete fluoride guide
This page is the Jacksboro companion — the local split 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.
Two supplies, side by side
CJUC says it in its own report FAQ: the commission adds fluoride to its water supply to reduce tooth decay in children, at approximately 0.7 parts per million — and then, in the same answer: "We do not add fluoride to the Stony Fork Wells." Same utility, same county, opposite policies. Here is each supply on its own terms.
Cove Lake plant supply
Fluoridated (adjusted), ~0.7 mg/L target per CJUC; 0.89 detected, range 0.08–0.89 (2024).
Surface water treated at the Cove Lake plant on Norris Lake. CJUC adds fluoride to this supply. The 2024 sampling reported in the commission's water quality report detected 0.89 mg/L, with results ranging from 0.08 to 0.89 mg/L — read that honestly: 0.89 is a single detected value, not an average, and the wide range means levels vary rather than sitting right on the 0.7 target.
Stony Fork Wells supply
No added fluoride; no level reported by CJUC.
Groundwater from the Stony Fork Wells. CJUC does not add fluoride to this supply — its report says so explicitly — and the commission reports no fluoride level for the wells. We publish no number for Stony Fork because CJUC publishes none; anyone who gives you one is guessing.
Cove Lake's level, against the benchmarks
Only one supply has a number to compare, so only one supply gets compared. The Stony Fork row in this table carries no number — because there isn't one to carry.
| Measure | Level | What it is |
|---|---|---|
| Cove Lake plant supply — detected level, 2024 | 0.89 mg/LRange 0.08–0.89 mg/L | A single detected value from 2024 sampling — not an average. The wide range means the level varies over time |
| CDC recommended level | 0.7 mg/L | The level U.S. public health agencies recommend for balancing cavity protection against fluorosis risk — also CJUC's stated target for the Cove Lake supply |
| EPA secondary (non-enforceable) standard | 2.0 mg/L | A non-enforceable guideline aimed at preventing cosmetic dental fluorosis (mottling) in children. Cove Lake's detected value is well under half of it |
| EPA enforceable maximum contaminant level (MCL) | 4.0 mg/L | The enforceable legal ceiling for fluoride in public drinking water. Cove Lake's detected value is far below it — no violation |
| Stony Fork Wells supply | No added fluoride — level not reported | CJUC adds no fluoride to the wells and reports no fluoride level for them, so there is no figure to set against the benchmarks |
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). Both supplies' known figures are far below both EPA standards.
Which supply do I have?
This is the question the whole page turns on, and the honest answer is: you can't tell from here. CJUC customers can tell which supply serves them only by asking CJUC. There is no map on this page, no street list, and no rule of thumb — because the fluoride answer flips completely with the answer, guessing wrong means getting your family's fluoride exactly backwards.
- Ask the commission directly. Contact the Caryville-Jacksboro Utilities Commission and ask which source — Cove Lake or Stony Fork Wells — feeds your address. That one answer settles everything else on this page for your household.
- Check your bill for service details. Your CJUC bill and account paperwork are the place to confirm your service details and account information before you call, so the commission can pull up the right service record for your address.
- Do not guess by neighborhood. Two homes in the same part of Jacksboro can sit on different supplies, and water from the two sources tastes the same either way. "My neighbor's water is fluoridated" is not evidence about yours — ask about your own address.
Until you've asked, plan for neither answer
If you haven't confirmed your supply yet, don't make supplement or treatment decisions that assume one answer or the other. The toothpaste advice below is the same on both supplies — start there, make the call to CJUC, and then read the varnish section with your actual supply in mind.
Do you still need fluoride toothpaste?
Yes — on either supply. Drinking water is background exposure; toothpaste is the main event, putting a concentrated dose of fluoride directly on the enamel twice a day. That matters everywhere, but it matters most for Stony Fork households, whose water adds none at all.
01 Toothpaste: yes, either way
Brush twice daily with fluoride toothpaste, whether your tap is Cove Lake or Stony Fork. On the Cove Lake supply, toothpaste does most of the protective work even with fluoridated water behind it. On the Stony Fork supply, toothpaste is the fluoride your teeth get — there is no background dose from the water to lean on.
Skipping fluoride toothpaste because "the water handles it" is a bad trade on the fluoridated supply, and on Stony Fork there is nothing handling it at all.
02 Kids: small amounts, supervised
Children need fluoride toothpaste too — in the right amount. The ADA's guidance: a rice-grain smear of toothpaste for children under age 3, and a pea-size amount for ages 3 and up.
Supervise brushing, teach spitting, and don't let kids swallow toothpaste. Young children who swallow it 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. This applies on both supplies; toothpaste, not tap water, is the dose parents actually control.
03 Fluoride varnish: it depends on your supply — plainly
For Stony Fork Wells households, varnish carries more value. Your water adds no fluoride at all, so an in-office treatment is not doubling up on a background dose — it is supplying one your household otherwise doesn't get from water.
For Cove Lake households whose water is fluoridated at target, varnish is a risk-based extra: most worthwhile if you or your child keeps getting cavities, less necessary if you don't. Same treatment, two different values — which is exactly why knowing your supply comes first.
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 from well to well.
Don't assume well water matches either CJUC supply. Test it before assuming anything — a certified lab fluoride test tells you the natural level, and any supplement decision should be made with a dentist or pediatrician who has that result in hand.
Questions people actually ask us
The real questions from the chair — answered straight, with Jacksboro's actual split.
It depends on which supply serves your home. Jacksboro's utility, the Caryville-Jacksboro Utilities Commission (CJUC, TN0000322), runs two supplies. The Cove Lake plant supply is fluoridated — CJUC adds fluoride at approximately 0.7 mg/L. The Stony Fork Wells supply has no added fluoride — CJUC states it plainly: 'We do not add fluoride to the Stony Fork Wells.' There is no single Jacksboro answer until you know your supply.
Ask CJUC. There is no reliable way to tell from your neighborhood, street, or water taste which of the two supplies feeds your home — the commission is the one that knows which source serves your address. Check your water bill for service details, then contact the Caryville-Jacksboro Utilities Commission and ask which supply — Cove Lake or Stony Fork Wells — serves your address. The fluoride answer flips completely depending on what they tell you, so don't guess.
No — but it is worth understanding what the number is. 0.89 mg/L is a single detected value from 2024 sampling reported in CJUC's water quality report, not an average. It sits above the CDC recommended level of 0.7 mg/L, but far below the EPA enforceable maximum contaminant level (MCL) of 4.0 mg/L and the EPA secondary (non-enforceable) standard of 2.0 mg/L. The reported range for Cove Lake ran from 0.08 to 0.89 mg/L, so levels vary over time rather than sitting at one fixed number.
Yes — on either supply. Drinking water is background exposure; fluoride toothpaste puts a concentrated dose directly on your enamel, twice a day, and that is where most cavity protection comes from. Brush twice daily with fluoride toothpaste. For children, the ADA recommends a rice-grain smear of toothpaste under age 3 and a pea-size amount from age 3 and up — supervise brushing, teach kids to spit, and don't let them swallow toothpaste.
Then your tap water adds no fluoride at all — CJUC does not add fluoride to the Stony Fork Wells, and the commission reports no fluoride level for the wells. That makes fluoride toothpaste twice a day more important, not less, and it is why in-office fluoride varnish carries more value for Stony Fork households: there is no background exposure from water to fall back on. If you are unsure whether supplements are right for your child, that is a conversation for your dentist or pediatrician — not a guess.
It depends on your supply and your cavity risk — stated plainly: for Stony Fork Wells households, varnish carries more value, because your water adds no fluoride at all. For Cove Lake households whose water is at the fluoridated target, varnish is a risk-based extra — most worthwhile if you or your child keeps getting cavities. Ask your dentist where your family falls; no one should sell you varnish as automatic either way.
Private well water is not fluoridated by any utility — whatever fluoride is in it is only what occurs naturally in the ground, and that varies. Don't assume your well water matches either CJUC supply. Have the water tested for fluoride before considering supplements, and make any supplement decision with a dentist or pediatrician who knows the test result.
Sources
- Caryville-Jacksboro Utilities Commission 2025 Water Quality Report, cjuc.net: the commission's own report FAQ states that CJUC adds fluoride to its water supply to reduce tooth decay in children, at approximately 0.7 parts per million, and states explicitly: "We do not add fluoride to the Stony Fork Wells." Its table reports 2024 Cove Lake sampling at 0.89 mg/L detected, range 0.08–0.89 mg/L, and reports no fluoride level for the Stony Fork Wells. Primary source for Jacksboro's status and levels; cited by name and publisher here because a clean direct URL for the report has not been verified.
- TapWaterData — Caryville-Jacksboro Utilities Commission: tapwaterdata.com/utilities/tn/caryville-jacksboro-utilities-commission reports an average of 0.424 mg/L for CJUC. That is an aggregator figure, and it differs from the CCR's own table — treat it as a secondary online record only; the CCR is the primary source, and its numbers are the ones used on this page.
- 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; supervise brushing and teach spitting.