Lead, arsenic and nitrate are worth checking in Utah County wells.

3 worth checking, 3 rare out of 6 health checks.

From 90 wells tested in Utah County since 2000; your own well needs its own test. How to read this

Tested wells over the limit UtahUtah

Lead12%2 of 16 Arsenic10%8 of 84 Nitrate9%8 of 86 Manganese3%3 of 88 Uranium0%0 of 49 Fluoride0%0 of 80

GermsTest every year, whatever the chart says

Coliform bacteria0%0 of 7 E. coli0%0 of 7

StainsNot a health risk

Iron stains15%13 of 85

Not charted, because fewer than 10 wells were tested: radon (9).

Rare: under 5%Worth checking: 5 to 15%Widespread: 15%+

Lab results: Water Quality Portal (USGS and EPA)

Show bacteria and iron

Who drinks from a well here

About 1 in 59 people 11,159 people

Nobody else tests these wells. Only you do.

People on wells: EPA researchers' 2020 estimate

Radon risk (a gas from rock)

LowMiddleHigh

Possible here. A home air test is inexpensive.

Radon zones: EPA map

Here's how Utah County compares with Utah and the counties around it.

Each result puts Utah County next to the 7 counties that border it, on the chart's 0 to 50% scale.

These 3 are worth checking in Utah County.

Lead2 of 16 wells over

2 of 16 wells tested here from 2001 to 2021 were over the EPA action level of 15 µg/L, against about 1 in 36 across Utah. Half the results were under 0.44 µg/L, and the top 1 in 10 were 12 µg/L or more. That's the highest share among the 18 Utah counties with 10 or more tested wells.

Utah and its neighbors

Utah12%

Salt Lake6%

Tooele2%

Juab0%

Wasatch0%

Too few tested to show: Carbon, Duchesne, Sanpete.

Lead guide

Arsenic8 of 84 wells over

About 1 in 10 wells tested here from 2001 to 2021 were over the EPA limit of 10 µg/L, against about 1 in 4 across Utah. Half the results were under 2.4 µg/L, and the top 1 in 10 were 8.0 µg/L or more. That's a smaller share than in 13 of the 21 other Utah counties with 10 or more tested wells, leaving out 2 counties whose results are likely overstated.

Utah and its neighbors

Salt Lake43%

Wasatch18%

Tooele15%

Utah10%

Sanpete4%

Duchesne4%

Juab0%

Too few tested to show: Carbon.

Arsenic guide

Nitrate8 of 86 wells over

About 1 in 11 wells tested here from 2000 to 2023 were over the EPA limit of 10 mg/L, against about 1 in 16 across Utah. Half the results were under 1.0 mg/L, and the top 1 in 10 were 24 mg/L or more. That's a bigger share than in 18 of the 22 other Utah counties with 10 or more tested wells, leaving out 1 county whose results are likely overstated.

Utah and its neighbors

Utah9%

Tooele6%

Sanpete4%

Salt Lake2%

Duchesne0%

Juab0%

Wasatch0%

Too few tested to show: Carbon.

Nitrate guide

These 3 are rare in Utah County.

Manganese3 of 88 wells over

3 of 88 wells tested here from 2000 to 2021 were over the EPA health advisory of 0.3 mg/L, against about 1 in 9 across Utah. At least half the results were too low for the lab to measure, and the top 1 in 10 were 0.076 mg/L or more. That's a smaller share than in 14 of the 21 other Utah counties with 10 or more tested wells, leaving out 1 county whose results are likely overstated.

Utah and its neighbors

Salt Lake19%

Juab7%

Wasatch4%

Tooele4%

Utah3%

Duchesne0%

Sanpete0%

Too few tested to show: Carbon.

Manganese guide

Uranium0 of 49 wells over

None of the 49 wells tested here from 2003 to 2021 were over the EPA limit of 30 µg/L, against about 1 in 39 across Utah. Half the results were under 2.2 µg/L, and the top 1 in 10 were 5.6 µg/L or more. Utah County had none, while 7 of the 18 other Utah counties with 10 or more tested wells had at least one.

Utah and its neighbors

Salt Lake5%

Duchesne0%

Juab0%

Sanpete0%

Tooele0%

Utah0%

Wasatch0%

Too few tested to show: Carbon.

Uranium guide

Fluoride0 of 80 wells over

None of the 80 wells tested here from 2000 to 2021 were over the EPA limit of 4 mg/L, against under 1 in 100 across Utah. Half the results were under 0.23 mg/L, and the top 1 in 10 were 0.49 mg/L or more. Utah County had none, while 4 of the 20 other Utah counties with 10 or more tested wells had at least one.

Utah and its neighbors

Duchesne4%

Juab0%

Salt Lake0%

Sanpete0%

Tooele0%

Utah0%

Wasatch0%

Too few tested to show: Carbon.

Too few Utah County wells were tested for this one.

Radon in water9 wells tested

Only 9 wells here were tested from 2003 to 2017, too few to say how common it is. Across Utah it's none.

Radon guide

None of the 7 Utah County wells tested for bacteria had it, but every well needs a yearly test.

Coliform bacteria0 of 7 wells had it

None of the 7 wells tested here from 2003 to 2017 had coliform bacteria, against about 1 in 15 across Utah.

Bacteria guide

E. coli0 of 7 wells had it

None of the 7 wells tested here from 2003 to 2017 had E. coli, against none across Utah.

E. coli means human or animal waste is getting in, so if a test of your Utah County well finds it, boil drinking water until the well is fixed.

Bacteria guide

Iron reached staining levels in 13 of 85 tested wells, and it isn't a health risk.

Iron stains13 of 85 wells had it

About 2 in 10 wells tested here from 2000 to 2021 had enough iron to stain (0.3 mg/L), against about 2 in 10 across Utah.

Utah and its neighbors

Duchesne33%

Salt Lake22%

Wasatch21%

Utah15%

Tooele8%

Juab7%

Sanpete5%

Too few tested to show: Carbon.

Iron guide

Utah County has 90 tested wells, and the busiest decade for testing was the 2000s.

69 wells had a test in the 2000s, 47 in the 2010s and 5 since 2020.

Only 5 of the 90 wells have a test from 2020 or later, so a fresh test of your own well tells you more than any of these.

Most Utah County wells in these records were tested for research or because someone suspected a problem, which can push the shares above what a typical home well would show (how we read the numbers).

One mail-in lab test covers the 4 things to check in Utah County.

Bacteria
Nitrate
Lead
Arsenic

What Utah offers well owners

Free testingWe didn't find a free program for all of Utah. Utah's private well page
Certified labsUtah's list of certified labs
Well recordsUtah's well record search

Here's what we know about radon and PFAS in Utah County.

Utah County is in the EPA's middle radon zone. An indoor air test is cheap and tells you whether to look at your water. Radon guide

Between 2023 and 2025 the EPA had 19 town water systems in Utah County test for PFAS. None found any. No well in Utah County has public PFAS results, so the town systems are the best clue to what's in the groundwater nearby. PFAS guide

Radon zones: EPA Map of Radon Zones. PFAS: EPA tests of town water systems, 2023 to 2025

Next door to Utah County

Salt Lake

Elsewhere in Utah

Iron San Juan Summit

All of Utah

Questions people ask about well water in Utah County

Is well water in Utah County safe to drink?

2 of 16 wells tested in Utah County had lead over the limit, about 1 in 8. Across Utah it's about 1 in 36. That's the highest share among the 18 Utah counties with 10 or more tested wells. So test your own well for lead before you count on it.

Where can I get my well tested in Utah County?

Use a lab Utah has certified for drinking water. Utah's list is linked above, in the box about testing. Ask for bacteria, nitrate, lead and arsenic, the tests that matter most in Utah County.

How does Utah County compare with the counties around it?

For lead, the share of tested wells over the limit: Utah County, at 12%, had a higher share than all 4 neighboring counties with data. Groundwater doesn't stop at county lines, so Salt Lake's 6% is worth knowing about if you live near it.

How often should I test my well in Utah County?

None of the 7 wells tested for bacteria in Utah County had it, but the CDC still says to test for bacteria and nitrate every year, and right away after a flood, a repair, or any change in taste or smell.

By the Tested Water teamData from the USGS, EPA and Department of Health and Human Services (Utah Public Health Laboratory) and local health departmentsUpdated November 8, 2026

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Where the Utah County numbers come from

People on wells: 11,159 in Utah County, from EPA estimates built on the 2020 Census (Murray et al.).
Lab tests: 1,189 well water samples from 90 wells in the Water Quality Portal, run by the USGS and EPA, 2000 to 2023.
Neighboring counties: the 7 counties that share a border with Utah County, from the Census Bureau's county adjacency file.
PFAS: EPA tests of 19 town water systems in Utah County under the Fifth Unregulated Contaminant Monitoring Rule, 2023 to 2025.
Radon: Utah County is zone 2 on the EPA Map of Radon Zones.
State programs and links: Department of Health and Human Services (Utah Public Health Laboratory) and local health departments, checked November 1, 2026.

Download this county's data (CSV)How we read these numbers Report an error