Fluoride in Utah well water
In Utah, 2% of 8,786 tested private well samples exceeded the EPA limit for fluoride (4 mg/L).
Natural fluoride in bedrock wells can exceed the limit. Above 4 mg/L long-term exposure causes skeletal fluorosis; above 2 mg/L children can develop tooth mottling.
Check your fluoride number
Type the value from your lab report. It is compared to the EPA limit, the same way the full interpretation does it.
Test your Utah well for fluoride
Certified lab analysis of your own tap water, bottles and prepaid return shipping included. The Essential well panel covers arsenic, uranium, nitrate, lead, copper, manganese, iron, sodium and bacteria; radon and PFAS are add-ons.
Order the Tap Score well water test kit, from $209Already tested? Upload the report
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Systems that remove fluoride
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Some links below are affiliate links. If you buy through one, the merchant pays us a commission at no extra cost to you. It does not change which products we list or what the data says.
For fluoride
Under-sink reverse osmosis system
under-sink or countertop, about $300
Look for NSF/ANSI 58 certification listing the contaminant you need removed.
For fluoride
Aquasana SmartFlow reverse osmosis
under-sink or countertop, about $225
Certified to NSF/ANSI 58 and 53 to reduce arsenic (96%, pentavalent), fluoride (90%), lead (99%), nitrate, nitrite and PFOA/PFOS at the kitchen tap, with a remineralizer.
Rather have it installed and sized for your well? Book a free in-home water test with a licensed local company.
Where to get a well tested for fluoride in Utah: certified labs, state programs and prices.
By county, from individual samples
Public monitoring samples against the EPA limit (4 mg/L); counties with at least 30 samples.
| County | Above EPA limit | Samples | Detected | Median | Highest |
|---|---|---|---|---|---|
| Uintah | 637 | 99% | 0.9 | 450 mg/L | |
| Emery | 129 | 97% | 0.5 | 12 mg/L | |
| Tooele | 906 | 93% | 0.215 | 64 mg/L | |
| Duchesne | 204 | 100% | 0.7 | 58 mg/L | |
| San Juan | 357 | 94% | 0.5 | 14 mg/L | |
| Iron | 631 | 97% | 0.26 | 7.3 mg/L | |
| Morgan | 66 | 98% | 0.2 | 6 mg/L | |
| Beaver | 469 | 100% | 0.433 | 7.8 mg/L | |
| Sanpete | 117 | 97% | 0.28 | 18 mg/L | |
| Grand | 138 | 96% | 0.35 | 8.9 mg/L | |
| Wayne | 147 | 96% | 0.29 | 28 mg/L | |
| Kane | 149 | 98% | 0.3 | 5 mg/L | |
| Sevier | 156 | 98% | 0.3 | 4.4 mg/L | |
| Cache | 185 | 93% | 0.2 | 4.5 mg/L | |
| Davis | 299 | 96% | 0.2 | 4.4 mg/L |
- Emery-Ferron CCD, Emery County17% of 42
- Dugway-Wendover CCD, Tooele County16% of 287
- Uintah and Ouray CCD, Uintah County12% of 430
- Duchesne CCD, Duchesne County6% of 49
- Beryl-Newcastle CCD, Iron County5% of 254
- Casa del Eco Mesa-White Mesa CCD, San Juan County3% of 88
- Beaver CCD, Beaver County3% of 59
- Salina CCD, Sevier County3% of 30
- Morgan North CCD, Morgan County3% of 40
- Roosevelt CCD, Duchesne County2% of 148
- Magna CCD, Salt Lake County2% of 50
- Smithfield CCD, Cache County2% of 56
- Thompson Springs CCD, Grand County2% of 60
- Blanding CCD, San Juan County2% of 190
- Monticello CCD, San Juan County2% of 66
- South Davis CCD, Davis County1% of 67
- West Box Elder CCD, Box Elder County1% of 92
- Hanksville CCD, Wayne County<1% of 101
- Kanab CCD, Kane County<1% of 126
- Milford-Minersville CCD, Beaver County<1% of 410
Sources
- Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. fluoride counts and shares are listed on each county and town page with their sources.