Is Mammoth, AZ tap water safe?
The short answer
1 of the 2 utilities serving Mammoth has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Town of Mammoth.
Arizona Water Co - Oracle, which serves the most people here, has 1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 35 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Mammoth’s ZIP codes, from EPA’s estimates.
- Open report
Arizona Water Co - Oracle
Arizona · serves 10,585 people · about 570 in Mammoth
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 35 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Town of Mammoth
Arizona · serves 1,181 people · under 100 in Mammoth
1 result above the action level and 1 result above the health goal. The worst: Lead at 19 ppb, above the action level.
1 health-based violation since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Arizona Water Co - Oracle’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic
Water testing near Mammoth
The 3 labs Arizona certifies closest to Mammoth, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Turner Laboratories, Inc.
Tucson, AZ · about 38 miles
Complete Analytical Services, LLC
Tucson, AZ · about 38 miles
Legend Technical Services of Arizona, Inc. DBA Legend Analytical
Tucson, AZ · about 38 miles
Which ZIP codes are in Mammoth: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Arizona Department of Health Services, Arizona certified commercial drinking water laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Mammoth
Other towns in Pinal County with a page of their own.
What to do next
- Read Arizona Water Co - Oracle’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water