Uranium in Arizona well water
In Arizona, 7% of 723 tested private well samples exceeded the EPA limit for uranium (30 ug/L).
Uranium in well water comes from granite bedrock. Its main health effect is chemical toxicity to the kidneys rather than radiation. It is common in the same areas where radon and arsenic occur.
Check your uranium 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 Arizona well for uranium
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 uranium
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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 uranium
Under-sink reverse osmosis system
under-sink or countertop, about $300
Look for NSF/ANSI 58 certification listing the contaminant you need removed.
For uranium
Whole-house arsenic and uranium filter
whole-house, at the point of entry, about $2,500
Adsorptive iron-based media; sized to your well yield.
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 uranium in Arizona: certified labs, state programs and prices.
By county, from individual samples
Public monitoring samples against the EPA limit (30 ug/L); counties with at least 30 samples.
| County | Above EPA limit | Samples | Detected | Median | Highest |
|---|---|---|---|---|---|
| Maricopa | 265 | 97% | 4.9 | 122 ug/L | |
| Apache | 32 | 97% | 6.5 | 38 ug/L | |
| Pima | 143 | 97% | 3.8 | 63 ug/L | |
| Cochise | 42 | 93% | 4.39 | 42.1 ug/L | |
| Yavapai | 61 | 82% | 1.3 | 86 ug/L | |
| Mohave | 38 | 100% | 6.29 | 21.1 ug/L | |
| Coconino | 71 | 94% | 3.52 | 15.3 ug/L |
- Buckeye CCD, Maricopa County26% of 85
- Phoenix CCD, Maricopa County11% of 122
- Tohono O'odham Nation CCD, Pima County4% of 92
- Tucson CCD, Pima County3% of 34
- Flagstaff CCD, Coconino County0% of 34
Sources
- Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. uranium counts and shares are listed on each county and town page with their sources.