Loading water data...
Detailed report on arsenic levels detected in Tempe's public drinking water supply. Last updated 2026-02-03.
0.0009 mg/L
Detected level is 8.7% of the EPA maximum contaminant level (0.01 mg/L)
Sample date: 2025-12-31
Overall Grade
Detected Level
0.0009 mg/L
EPA Maximum (MCL)
0.01 mg/L
Percentage of Limit
8.7%
The detected level of arsenic in Tempe's water is below 50% of the EPA's maximum contaminant level. While any detection warrants awareness, this level is considered safe by federal standards. EPA MCL: 0.010 mg/L (10 ppb).
This data is based on water quality testing performed on 2025-12-31. Water quality can vary over time, and we recommend checking for the most recent data periodically.
Long-term arsenic exposure is linked to skin damage, circulatory problems, and increased cancer risk (skin, bladder, lung). Even low levels over time can be harmful.
Residents of Tempe should be aware that arsenic has been detected in the local water supply at 8.7% of the EPA limit. Current levels are within safe limits, but ongoing awareness is important.
Certain groups face higher risks from arsenic exposure:
Arsenic occurs naturally in certain rock formations and can leach into groundwater. It can also come from industrial runoff, mining operations, and agricultural chemicals.
Tempe draws its drinking water from surface water sources (rivers, lakes, or reservoirs). The city is served by 1 water system, including TEMPE WATER SYSTEM.
Arsenic was detected in Tempe's water at 0.0009 mg/L, which is 8.7% of the EPA maximum. This is within federal safety limits. Consider a certified water filter for extra peace of mind, particularly if you have young children or are in a vulnerable health group.
The following filtration methods are proven effective at reducing or removing arsenic from drinking water:
Reverse Osmosis
Specialty Adsorption Media
Distillation
When choosing a filter, look for NSF/ANSI certification specific to arsenic removal. Not all filters are equally effective, and certification ensures the product has been independently tested.
See Filter Recommendations for TempeBased on the most recent testing data, arsenic was detected in Tempe, Arizona water at a level of 0.0009 mg/L. This is 8.7% of the EPA maximum contaminant level of 0.01 mg/L. EPA MCL: 0.010 mg/L (10 ppb).
Arsenic was detected in Tempe's water at 8.7% of the EPA limit, which is considered safe by federal standards. Long-term arsenic exposure is linked to skin damage, circulatory problems, and increased cancer risk (skin, bladder, lung). Even low levels over time can be harmful. While current levels are not considered dangerous, some health organizations suggest minimizing exposure whenever possible.
The most effective methods for removing arsenic from your drinking water are: Reverse Osmosis, Specialty Adsorption Media, Distillation. When purchasing a filter, look for NSF/ANSI certification that specifically covers arsenic removal. Installation of a point-of-use filter (at your kitchen faucet or as an under-sink system) provides targeted protection for drinking and cooking water. For whole-house protection, a point-of-entry system can treat all water entering your home.
Yes, Tempe's water utility is required by the EPA to regularly test for arsenic as part of the Safe Drinking Water Act. The most recent testing detected arsenic at 0.0009 mg/L. These results are published in the city's annual Consumer Confidence Report (CCR), also known as a Water Quality Report. You can also request additional testing information directly from your local water utility or have your home's water independently tested for a more specific assessment.
Full Water Quality Report
Tempe, Arizona — All contaminants, scores, and violations
Filter Recommendations
Best water filters for Tempe based on local contaminants
Arsenic Across Arizona
Statewide arsenic levels and city rankings
Is Tempe Water Safe to Drink?
Complete safety assessment for Tempe tap water