City water profile
Find official utility reports, understand hardness, and check the water system serving your home in Phoenix, Arizona.
Your tap water
Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.
172–302 ppm
Utility-reported hardness as CaCO₃ · 2025
Distribution-system range. The utility does not publish a single average in this table. Source blends and the time of year can change hardness at a property.
Read the utility’s source report ↗Page 4, aesthetic water quality analysis, Total Hardness. Source checked Sep 29, 2026.
Match the name on your water bill
These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.
EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.
AZ0407025 · Surface water · 1,695,000 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Read 2025 Water Quality Report ↗An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
EPA SDWIS Lead and Copper Rule samples
18% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | May 1, 2025 to May 31, 2025 |
| Surface Water Treatment Rule | Archived | May 1, 2025 to May 31, 2025 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | Resolved | Jan 1, 2021 to Jan 12, 2021 |
AZ0407531 · Groundwater · 14,723 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
EPA SDWIS Lead and Copper Rule samples
0% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
| Rule | Status | Period |
|---|---|---|
| Arsenic | Resolved | Apr 1, 2024 to Jun 30, 2024 |
| Radium-226 | Resolved | Jan 1, 2024 to Mar 31, 2024 |
| Radium-228 | Resolved | Jan 1, 2024 to Mar 31, 2024 |
| Combined Radium (-226 and -228) | Resolved | Jul 1, 2023 to Sep 30, 2023 |
| Gross Alpha, Excl. Radon and U | Resolved | Jul 1, 2023 to Sep 30, 2023 |
| Radium-228 | Resolved | Jul 1, 2023 to Sep 30, 2023 |
| Combined Uranium | Resolved | Jul 1, 2023 to Sep 30, 2023 |
| Radium-226 | Resolved | Jul 1, 2023 to Sep 30, 2023 |
| Arsenic | Resolved | Apr 1, 2023 to Jun 30, 2023 |
AZ0407065 · Groundwater · 6,202 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
EPA SDWIS Lead and Copper Rule samples
0% of the listed benchmark
Monitoring period: Jan 1, 2021 to Dec 31, 2023
| Rule | Status | Period |
|---|---|---|
| Chlorine | Resolved | Oct 1, 2023 to Dec 31, 2023 |
| Chlorine | Resolved | Jan 1, 2023 to Mar 31, 2023 |
AZ0407700 · Groundwater · 1,500 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
EPA SDWIS Lead and Copper Rule samples
0% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Archived | Dec 1, 2025 to Dec 31, 2025 |
| Chlorine | Archived | Oct 1, 2025 to Oct 31, 2025 |
| Public Notice | Resolved | Dec 20, 2024 to Feb 12, 2025 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Apr 17, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Apr 17, 2025 |
| Public Notice | Resolved | Feb 16, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Public Notice | Resolved | Feb 8, 2024 to Jul 1, 2024 |
| Chlorine | Resolved | Jan 1, 2024 to Jan 31, 2024 |
| E. COLI | Resolved | Aug 2, 2023 to Jul 1, 2024 |
| Chlorine | Resolved | Jul 1, 2023 to Sep 30, 2023 |
| Revised Total Coliform RuleHealth-based | Resolved | May 1, 2021 to May 31, 2021 |
AZ0407307 · Groundwater · 680 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
EPA SDWIS Lead and Copper Rule samples
0% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Unaddressed | Jan 1, 2026 |
| Public Notice | Resolved | Dec 20, 2024 to Feb 26, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Feb 26, 2025 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Feb 26, 2025 |
| Chlorine | Resolved | Oct 1, 2022 to Dec 31, 2022 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Jul 19, 2022 |
| Chlorine | Resolved | Jan 1, 2022 to Mar 31, 2022 |
AZ0407682 · Groundwater · 500 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
EPA SDWIS Lead and Copper Rule samples
0% of the listed benchmark
Monitoring period: Jan 1, 2024 to Dec 31, 2024
EPA SDWIS reported health-based violation
110% of the listed benchmark
Monitoring period: Jan 1, 2026 to Mar 31, 2026
| Rule | Status | Period |
|---|---|---|
| ArsenicHealth-based | Archived | Jan 1, 2026 to Mar 31, 2026 |
| Consumer Confidence Rule | Resolved | Oct 2, 2025 to Nov 17, 2025 |
| ArsenicHealth-based | Resolved | Apr 1, 2022 to Jun 30, 2022 |
| ArsenicHealth-based | Resolved | Jan 1, 2022 to Mar 31, 2022 |
AZ0407621 · Groundwater · 400 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
EPA SDWIS Lead and Copper Rule samples
93% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Nov 1, 2025 to Jan 20, 2026 |
| Revised Total Coliform Rule | Resolved | Aug 1, 2025 to Oct 20, 2025 |
| LEAD AND COPPER RULE REVISIONS | Unaddressed | Jul 2, 2025 |
AZ0407511 · Groundwater · 96 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
EPA SDWIS Lead and Copper Rule samples
7% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | May 1, 2021 to Jun 18, 2021 |
AZ0407280 · Groundwater · 40 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
1 reported active health-based record(s) for this system
Find this utility’s official report →An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
EPA SDWIS Lead and Copper Rule samples
17% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
| Rule | Status | Period |
|---|---|---|
| Public Notice | Unaddressed | Nov 16, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Oct 29, 2025 |
| Consumer Confidence Rule | Resolved | Oct 2, 2025 to Mar 31, 2026 |
| Consumer Confidence Rule | Resolved | Jul 1, 2025 to Jul 1, 2025 |
| Public Notice | Unaddressed | Dec 20, 2024 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Mar 26, 2026 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Mar 26, 2026 |
| Revised Total Coliform Rule | Resolved | Nov 1, 2023 to Nov 30, 2023 |
| Revised Total Coliform Rule | Resolved | Nov 1, 2023 to Dec 28, 2023 |
City summary
Phoenix has 47 published ZIP profiles across Maricopa County. The regional-evidence median is 54 PPM. Its comparison-eligible median is 54 PPM versus 55 PPM statewide.
Among the 7 Arizonacities meeting the comparison standard, Phoenix ranks #7from highest to lowest. Across all 285 state ZIP profiles, available estimates run from 54to 481 PPM.
The 44–64 PPM range shows how much the available ZIP estimates vary within the city label. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.
Hardness distribution
47 of 47 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.
Evidence quality
Confidence labels
Observation window: Nov 29, 2018 to Dec 18, 2024.
ZIP directory
Open a ZIP for site-level provenance and measurements.
ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
55 PPM
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ZIP code
55 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
55 PPM
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ZIP code
55 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
55 PPM
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ZIP code
54 PPM
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ZIP code
55 PPM
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ZIP code
54 PPM
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ZIP code
55 PPM
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ZIP code
55 PPM
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ZIP code
60 PPM
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ZIP code
54 PPM
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ZIP code
60 PPM
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ZIP code
64 PPM
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ZIP code
54 PPM
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ZIP code
55 PPM
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ZIP code
54 PPM
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ZIP code
60 PPM
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ZIP code
54 PPM
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ZIP code
55 PPM
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ZIP code
56 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
54 PPM
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ZIP code
56 PPM
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ZIP code
44 PPM
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ZIP code
54 PPM
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ZIP code
49 PPM
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ZIP code
55 PPM
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ZIP code
54 PPM
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ZIP code
64 PPM
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ZIP code
64 PPM
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Practical next steps
Continue comparing
Avondale
Maricopa County
64 PPM median
Buckeye
Maricopa County
481 PPM median
Carefree
Maricopa County
68 PPM median
Cave Creek
Maricopa County
88 PPM median
Chandler
Maricopa County
56 PPM median
El Mirage
Maricopa County
236 PPM median
Questions people ask
Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.
Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.
Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.