Records currently available
Arizona record snapshot
These counts describe reviewed records available on Water Quality Lookup. They are not a count of every provider, city, or county in Arizona.
Reviewed profiles or limited identity records.
Local entry points, not service-area boundaries.
Guide sources reviewed September 13, 2026.
Cities
Arizona city entry points currently available
These Arizona city pages are local starting points. City boundaries and water service areas may not match, and more than one provider may serve a city.
Flagstaff
Start with City of Flagstaff, then confirm the provider for your address.
Open FlagstaffPrescott
Start with City of Prescott, then confirm the provider for your address.
Open PrescottYuma
Start with City of Yuma, then confirm the provider for your address.
Open YumaCasa Grande
Start with Arizona Water Company - Pinal Valley, then confirm the provider for your address.
Open Casa GrandeSierra Vista
Start with Arizona Water Company - Sierra Vista, then confirm the provider for your address.
Open Sierra VistaMarana
Start with Marana Municipal Water System, then confirm the provider for your address.
Open MaranaView 9 more available cities
Water systems
Arizona public water systems currently available
These previews link to reviewed system profiles with identifiers, report-year context, sources, and limitations.
City of Flagstaff
PWSID AZ0403008 · Flagstaff · Latest reviewed report 2025
View system profileCity of Prescott
PWSID AZ0413045 · Prescott · Latest reviewed report 2024
View system profileCity of Yuma
PWSID AZ0414024 · Yuma · Latest reviewed report 2025
View system profileArizona Water Company - Pinal Valley
PWSID AZ0411009 · Casa Grande · Latest reviewed report 2024
View system profileArizona Water Company - Sierra Vista
PWSID AZ0402004 · Sierra Vista · Latest reviewed report 2024
View system profileMarana Municipal Water System
PWSID AZ0410150 · Marana · Latest reviewed report 2024
View system profileReport highlights
Explore three Arizona utility reports
These selected reports describe different local sources and reporting years. The existing profiles retain their June 10, 2026 review dates.
Flagstaff · 2025 report
Upper Lake Mary and source protection
Flagstaff's report describes Upper Lake Mary water being treated at the Lake Mary Water Treatment Plant. Its source-water assessment section also explains how surrounding land uses and local geology inform source protection.
Prescott · 2024 report
Groundwater from the Little Chino Sub-Basin
Prescott's 2024 report identifies groundwater as its drinking-water source. It describes wells in the Prescott Active Management Area drawing from the deep Lower Volcanic Unit beneath the Little Chino Sub-Basin, followed by treatment and distribution.
Yuma · 2025 report
Use the existing report overview as a starting point
Our Yuma system page brings together its reviewed report link, selected results and source limitations. Keep the report year and individual sampling dates together when reading those results. Ask the city for a copy if its report download is unavailable.
Continue your Arizona lookup
Use the system directory, a plain-language guide, or the methodology page for the next step.
System directory
Arizona public water systems
Browse the reviewed system profiles currently available for this state.
Browse systemsLookup guide
How to look up your drinking water system
Start with a utility bill, PWSID, state lookup tool, or official report so you can find the public water system behind a city or provider name.
Read the lookup guideReport guide
How to read a water quality report
A plain-English walkthrough of Consumer Confidence Reports, including report years, detected contaminants, legal limits, violations, and source notes.
Read the report guideData and trust
Sources, methodology, and limitations
See how records are sourced, reviewed, dated, and limited before using a summary.
Review methodologyStatewide context
How Arizona drinking-water records fit together
Oversight
ADEQ and local programs have distinct roles
The Arizona Department of Environmental Quality's Safe Drinking Water program works with local counties on public-system oversight. ADEQ links the Maricopa County drinking-water program and Pima County environmental-quality office; choose the program relevant to the system before asking about a local record.
Source water
An assessment describes the source setting
ADEQ's source-water protection resources address where a system's water comes from and potential contamination sources around it. Flagstaff and Prescott show why that local setting matters. A source-water assessment does not establish the provider serving a property or a current result at its tap.
Historical compliance
Check the reporting period before using a statewide summary
ADEQ's drinking-water page links a 2022 annual compliance report published July 1, 2023. That document explains historical monitoring and violation categories. Its reporting period should remain visible; it cannot establish today's notice status or describe every household's water.
Official lookup
Find an Arizona public water system by its identifier
Search steps
Use the Safe Drinking Water Database
The public search offers Water System No., Water System Name, county, system type and primary source-water type. Start with the provider shown on your bill or annual report.
- Enter the full system number or provider name.
- Choose Search For Water Systems and open the matching system number.
- Compare the name and number with your provider before using the record. Ask the utility to confirm service at your address.
Verified example
Flagstaff City Of · AZ0403008
Our September 13, 2026 review submitted AZ0403008 in the official public form and returned one FLAGSTAFF CITY OF record. Opening its linked detail confirmed that identity; EPA's exact-ID record matched it too.
County and primary-source labels describe that system record. They do not establish the boundaries of its service area or identify a private well.
Official tools
Arizona resources for the next question
Annual reports
Find the issued report or request a copy
Flagstaff's water-quality page links its 2025 Consumer Confidence Report. For a report that is missing, blocked or difficult to use, ask the provider for the reporting year and format you need. A report's publication date and sample dates can differ.
Notices and contacts
Confirm current instructions with the provider
An annual report and a historical compliance summary do not replace a current provider notice. Confirm the affected area, effective date and instructions, and check for an update or lifting notice. ADEQ's contact page provides an additional route for questions about its drinking-water program.
Lead and plumbing
Separate system results from a home's plumbing
EPA's lead guidance explains why service lines and household plumbing need their own attention. Ask the confirmed provider about its service-line records and testing options. A system-level lead result does not identify a particular property's line material or tap result.
PFAS resources
Use the date on guidance as well as on results
ADEQ's Arizona Public Water System PFAS Toolkit is dated November 2023. It is a system-focused resource; its date matters when reading background on regulation or response planning. For a measured result, keep the system, compound, sample date, units and reporting limit together and confirm the applicable current rule separately.
Private wells
Separate well construction from water testing
Arizona Department of Water Resources provides well-drilling information. Water-quality testing is a separate question: EPA's private-well guidance explains testing and maintenance for a household supply. Contact a qualified laboratory about the tests and collection instructions for your well; a nearby public-system report cannot substitute for that sample.
Common questions
Reading Arizona records in context
System identity
Why search by system number instead of city?
The Arizona search treats a system's number, name and county as separate fields. The name on a bill may differ from a city name. Match the public system number and ask the provider to confirm your property before applying a report.
Source assessments
Does a source-water assessment describe my tap?
It describes the source's setting and protection, including surrounding land use and geology. Your tap is farther along the supply and plumbing system; an assessment is not a current household sample or service-area map.
Reporting years
Why do these report years differ?
The selected Flagstaff and Yuma overviews use 2025 reports; Prescott's existing overview uses its 2024 report. The linked statewide compliance document covers 2022. Each source's own period matters, and the date we reviewed this guide does not change those periods.
Official sources
Official sources for Arizona
Use Arizona Department of Environmental Quality and the official sources below to verify system identity, record dates, and current notices before relying on a summary.
Statewide sources
Arizona Department of Environmental Quality
State data
State data
State data
State data
State data
PWSID AZ0403008 · Sources for this system
City of Flagstaff
PWSID AZ0413045 · Sources for this system
City of Prescott
PWSID AZ0414024 · Sources for this system