Sodium in Arizona well water
In Arizona, sodium was detected in 100% of 19,491 tested private well samples.
Sodium enters wells with road salt and from softeners. EPA's guidance level of 20 mg/L matters for people on sodium-restricted diets; most people are not affected below 250 mg/L.
Check your sodium 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 sodium
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 sodium
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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 sodium
Under-sink reverse osmosis system
under-sink or countertop, about $300
Look for NSF/ANSI 58 certification listing the contaminant you need removed.
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 sodium in Arizona: certified labs, state programs and prices.
By county, from individual samples
Public monitoring samples against the EPA limit; counties with at least 30 samples.
| County | Above EPA limit | Samples | Detected | Median | Highest |
|---|---|---|---|---|---|
| Apache | no limit | 718 | 100% | 94 | 24,000 mg/L |
| Cochise | no limit | 944 | 100% | 35 | 39,700 mg/L |
| La Paz | no limit | 611 | 100% | 152 | 1,380 mg/L |
| Maricopa | no limit | 7,786 | 100% | 258 | 13,900 mg/L |
| Mohave | no limit | 1,241 | 100% | 94 | 2,074 mg/L |
| Navajo | no limit | 803 | 100% | 59 | 6,000 mg/L |
| Pinal | no limit | 839 | 100% | 110 | 1,180 mg/L |
| Yavapai | no limit | 1,157 | 100% | 26 | 2,700 mg/L |
| Greenlee | no limit | 123 | 100% | 44 | 1,300 mg/L |
| Yuma | no limit | 1,713 | 100% | 645 | 12,000 mg/L |
| Pima | no limit | 1,281 | 100% | 45 | 1,400 mg/L |
| Graham | no limit | 425 | 100% | 110 | 3,600 mg/L |
| Gila | no limit | 1,056 | 100% | 62 | 690 mg/L |
| Coconino | no limit | 627 | 99% | 20 | 40,200 mg/L |
| Santa Cruz | no limit | 167 | 99% | 28 | 90 mg/L |
- Lake Havasu City CCD, Mohave County100% detected of 212
- North Mohave CCD, Mohave County100% detected of 157
- Bullhead City CCD, Mohave County100% detected of 339
- Salt River CCD, Maricopa County100% detected of 76
- Kingman CCD, Mohave County100% detected of 533
- Deer Valley CCD, Maricopa County100% detected of 133
- Gila Bend CCD, Maricopa County100% detected of 468
- St. Johns CCD, Maricopa County100% detected of 72
- Chandler CCD, Maricopa County100% detected of 432
- Wickenburg CCD, Maricopa County100% detected of 249
- Phoenix CCD, Maricopa County100% detected of 5,752
- Buckeye CCD, Maricopa County100% detected of 578
- Tonto Basin CCD, Gila County100% detected of 74
- Globe-Miami CCD, Gila County100% detected of 813
- Eagar-Springerville CCD, Apache County100% detected of 95
- Sweetwater CCD, Apache County100% detected of 40
- Chinle CCD, Apache County100% detected of 92
- St. Johns CCD, Apache County100% detected of 296
- Fort Defiance CCD, Apache County100% detected of 57
- Puerco CCD, Apache County100% detected of 124
Sources
- Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. sodium counts and shares are listed on each county and town page with their sources.