Is Casas Adobes, AZ tap water safe?
The short answer
1 of the 8 utilities serving Casas Adobes has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Carolanne Drive HOA.
Metropolitan Dwid, 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 18.3 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 Casas Adobes’s ZIP codes, from EPA’s estimates.
- Open report
Metropolitan Dwid
Arizona · serves 45,570 people · about 34,600 in Casas Adobes
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 18.3 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
City of Tucson
Arizona · serves 732,906 people · about 17,200 in Casas Adobes
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 63.7 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Oro Valley Water Utility
Arizona · serves 42,316 people · about 2,300 in Casas Adobes
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 19 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Oro Valley Water Countryside
Arizona · serves 6,031 people · about 1,900 in Casas Adobes
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 16 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Marana Municipal - Hartman Vistas
Arizona · serves 5,408 people · about 1,400 in Casas Adobes
2 results 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: PFOS at 23 ppt, above EPA’s new limit, which takes effect in 2029.
No health-based violations since 2016
- Open report
Mission Palms Apartments
Arizona · serves 720 people · about 500 in Casas Adobes
1 result above the health goal. The worst: Lead at 7.9 ppb, above the health goal.
No health-based violations since 2016
- Open report
Carolanne Drive HOA
Arizona · serves 72 people · nearly all in Casas Adobes
Nothing in its records is above a health goal.
1 health-based violation since 2016
- Open report
Mesaland Water Company
Arizona · serves 294 people · nearly all in Casas Adobes
1 result above the health goal. The worst: Lead at 7.9 ppb, above the health goal.
No 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 Metropolitan Dwid’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, 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 Casas Adobes
The 3 labs Arizona certifies closest to Casas Adobes, 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 13 miles
Complete Analytical Services, LLC
Tucson, AZ · about 13 miles
Legend Technical Services of Arizona, Inc. DBA Legend Analytical
Tucson, AZ · about 13 miles
Which ZIP codes are in Casas Adobes: 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 Casas Adobes
Other towns in Pima County with a page of their own.
What to do next
- Read Metropolitan Dwid’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