Is Martinez Lake, AZ tap water safe?
The short answer
2 of the 2 utilities serving Martinez Lake have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: City of Yuma and Shepard Water Company.
City of Yuma, which serves the most people here, has 3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 150 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 Martinez Lake’s ZIP codes, from EPA’s estimates.
- Open report
City of Yuma
Arizona · serves 103,264 people · under 100 in Martinez Lake
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 150 ppb, above EPA’s health benchmark.
23 health-based violations since 2016
- Open report
Shepard Water Company
Arizona · serves 430 people · lists Martinez Lake among the places it serves
1 result above the legal limit and 1 result above the health goal. The worst: Arsenic at 11.1 ppb, above the legal limit.
16 health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in City of Yuma’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, Lead
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, Lead
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, Lead
Water testing near Martinez Lake
The 2 labs Arizona certifies closest to Martinez Lake, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Fresh Terra Services, LLC.
Yuma, AZ · about 21 miles
Eurofins Microbiology Laboratories
Yuma, AZ · about 21 miles
ZIP codes in Martinez Lake
Which ZIP codes are in Martinez Lake: 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 Martinez Lake
Other towns in Yuma County with a page of their own.
What to do next
- Read City of Yuma’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