Is Florence, AZ tap water safe?
The short answer
7 of the 8 utilities serving Florence have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Epcor - San Tan, Florence Water Company, Adoc Eyman Unit and 4 more.
Epcor - San Tan, which serves the most people here, has 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 185 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 Florence’s ZIP codes, from EPA’s estimates.
- Open report
Epcor - San Tan
Arizona · serves 87,435 people · about 1,300 in Florence
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 185 ppb, above EPA’s health benchmark.
2 health-based violations since 2016
- Open report
Florence Water Company
Arizona · serves 14,593 people · about 1,100 in Florence
1 result above the legal limit, 1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Nitrate at 4.3 ppm, above the legal limit.
1 health-based violation since 2016
- Open report
Adoc Eyman Unit
Arizona · serves 3,969 people · about 540 in Florence
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 162 ppb, above EPA’s health benchmark.
4 health-based violations since 2016
- Open report
Epcor - San Tan Anthem
Arizona · serves 10,362 people · about 290 in Florence
1 result above EPA’s new limit, which takes effect in 2029, 1 result above the health goal and 1 result above EPA’s health benchmark. The worst: PFOA at 19 ppt, above EPA’s new limit, which takes effect in 2029.
No health-based violations since 2016
- Open report
Adoc Florence Asp
Arizona · serves 1,001 people · under 100 in Florence
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 86.2 ppb, above EPA’s health benchmark.
2 health-based violations since 2016
- Open report
Tonto Basin Water - Cactus Forest
Arizona · serves 730 people · under 100 in Florence
1 result above the legal limit. The worst: Arsenic at 10.4 ppb, above the legal limit.
2 health-based violations since 2016
- Open report
Park Water Company Inc
Arizona · serves 427 people · under 100 in Florence
1 result above the legal limit and 1 result above the health goal. The worst: Nitrate at 1.9 ppm, above the legal limit.
4 health-based violations since 2016
- Open report
Desert Gardens Rv Resort Co - Op, Inc
Arizona · serves 532 people · lists Florence among the places it serves
1 result above the legal limit and 1 result above the health goal. The worst: Arsenic at 16.2 ppb, above the legal limit.
20 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 Epcor - San Tan’s water, which serves the most people here. Another utility’s report names what handles its own results.
Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money
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 Florence
The 3 labs Arizona certifies closest to Florence, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Radiation Safety Engineering, Inc.
Chandler, AZ · about 45 miles
AnalysisNow! Inc.
Chandler, AZ · about 45 miles
Statewide Laboratory
Mesa, AZ · about 45 miles
ZIP codes in Florence
Which ZIP codes are in Florence: 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 Florence
Other towns in Pinal County with a page of their own.
What to do next
- Read Epcor - San Tan’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