Lead in Arizona well water
In Arizona, 2% of 6,119 tested private well samples exceeded the EPA limit for lead (15 ug/L).
Lead in well water almost always comes from household plumbing and older fixtures, not the aquifer, and corrosive (low pH) well water makes it worse. There is no safe level for children; it harms brain development.
Check your lead 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 lead
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 lead
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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 lead
Under-sink reverse osmosis system
under-sink or countertop, about $300
Look for NSF/ANSI 58 certification listing the contaminant you need removed.
For lead
Acid neutralizing filter
whole-house, at the point of entry, about $1,200
Raises pH so plumbing stops leaching lead and copper.
For lead
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 lead in Arizona: certified labs, state programs and prices.
By county, from individual samples
Public monitoring samples against the EPA limit (15 ug/L); counties with at least 30 samples.
| County | Above EPA limit | Samples | Detected | Median | Highest |
|---|---|---|---|---|---|
| Gila | 624 | 31% | 0 | 700 ug/L | |
| Navajo | 94 | 24% | 0 | 48 ug/L | |
| Santa Cruz | 101 | 16% | 0 | 22 ug/L | |
| Mohave | 647 | 17% | 0 | 100 ug/L | |
| Yavapai | 607 | 22% | 0 | 256 ug/L | |
| Pima | 630 | 16% | 0 | 700 ug/L | |
| Coconino | 224 | 49% | 0 | 40 ug/L | |
| Yuma | 252 | 9% | 0 | 18 ug/L | |
| Pinal | 395 | 13% | 0 | 100 ug/L | |
| Graham | 322 | 16% | 0 | 190 ug/L | |
| Maricopa | 1,175 | 22% | 0 | 500 ug/L | |
| Apache | 94 | 21% | 0 | 11 ug/L | |
| Cochise | 519 | 14% | 0 | 11 ug/L | |
| La Paz | 358 | 10% | 0 | 10 ug/L | |
| Greenlee | 77 | 3% | 0 | 10 ug/L |
- Globe-Miami CCD, Gila County20% of 484
- Casa Grande CCD, Pinal County4% of 45
- Tohono O'odham Nation CCD, Pima County4% of 73
- Mingus Mountain CCD, Yavapai County4% of 78
- Nogales CCD, Santa Cruz County3% of 60
- Tuba City CCD, Coconino County3% of 32
- Ajo CCD, Pima County3% of 34
- Prescott CCD, Yavapai County3% of 192
- Bullhead City CCD, Mohave County2% of 209
- Pima CCD, Graham County2% of 44
- Florence CCD, Pinal County2% of 51
- Salt River CCD, Maricopa County2% of 52
- Kingman CCD, Mohave County2% of 238
- Arivaca CCD, Pima County1% of 68
- Yuma CCD, Yuma County1% of 71
- North Mohave CCD, Mohave County1% of 76
- Phoenix CCD, Maricopa County1% of 370
- Camp Verde-Sedona CCD, Yavapai County<1% of 107
- Lake Havasu City CCD, Mohave County<1% of 124
- Flagstaff CCD, Coconino County<1% of 129
Sources
- Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. lead counts and shares are listed on each county and town page with their sources.