City water profile

Water hardness in Casa Grande

Find official utility reports, understand hardness, and check the water system serving your home in Casa Grande, Arizona.

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 8
Active health records: 0

Your tap water

What does the utility report?

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.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →

Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

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.

Arizona Water Co - Pinal Valley

AZ0411009 · Groundwater · 134,432 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 →

Measurements (1)

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.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2025

Violation history (2)

Imported violation history for Arizona Water Co - Pinal Valley
Rule	Status	Period
E. COLI	Resolved	Aug 20, 2025 to Dec 16, 2025
Arsenic	Resolved	Apr 1, 2025 to Jun 30, 2025

Picacho Water Company

AZ0411135 · Groundwater · 2,440 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 →

Measurements (1)

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.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2025

Violation history (9)

Imported violation history for Picacho Water Company
Rule	Status	Period
Lead and Copper Rule	Unaddressed	Jan 1, 2026
Public Notice	Resolved	Nov 19, 2025 to Dec 12, 2025
Lead and Copper Rule	Unaddressed	Oct 1, 2025
Total Haloacetic Acids (HAA5)	Resolved	Jul 1, 2024 to Sep 30, 2024
TTHM	Resolved	Jul 1, 2024 to Sep 30, 2024
Lead and Copper Rule	Resolved	Jan 1, 2023 to Mar 14, 2023
TTHM	Resolved	Sep 1, 2021 to Aug 31, 2022
Total Haloacetic Acids (HAA5)	Resolved	Sep 1, 2021 to Aug 31, 2022
Nitrate	Resolved	Jan 1, 2021 to Mar 31, 2021

Arizona Water Co - Tierra Grande

AZ0411076 · Groundwater · 1,796 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 →

Measurements (1)

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.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2022 to Dec 31, 2024

Violation history (2)

Imported violation history for Arizona Water Co - Tierra Grande
Rule	Status	Period
LEAD AND COPPER RULE REVISIONS	Resolved	Oct 17, 2024 to Nov 13, 2024
LEAD AND COPPER RULE REVISIONSHealth-based	Resolved	Oct 17, 2024 to Nov 13, 2024

Awc - Casa Grande West Water Company

AZ0411024 · Groundwater · 943 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 →

Measurements (1)

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.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2022 to Dec 31, 2024

Violation history (1)

Imported violation history for Awc - Casa Grande West Water Company
Rule	Status	Period
Chlorine	Resolved	Apr 1, 2021 to Jun 30, 2021

Arizona Water Co - Stanfield

AZ0411012 · Groundwater · 639 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 →

Measurements (1)

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.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2025

Violation history (2)

Imported violation history for Arizona Water Co - Stanfield
Rule	Status	Period
LEAD AND COPPER RULE REVISIONSHealth-based	Resolved	Oct 17, 2024 to Nov 12, 2024
LEAD AND COPPER RULE REVISIONS	Resolved	Oct 17, 2024 to Nov 12, 2024

Sierra Vista Rv Park

AZ0411383 · Groundwater · 200 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 →

Measurements (2)

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.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2024 to Dec 31, 2024

Arsenic

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.011 MG/L
Maximum contaminant level: 0.01 MG/L

110% of the listed benchmark

Monitoring period: Apr 1, 2024 to Jun 30, 2024

Violation history (17)

Imported violation history for Sierra Vista Rv Park
Rule	Status	Period
ArsenicHealth-based	Resolved	Apr 1, 2024 to Jun 30, 2024
Public Notice	Resolved	Mar 31, 2024 to Apr 15, 2024
ArsenicHealth-based	Resolved	Jan 1, 2024 to Mar 31, 2024
Revised Total Coliform RuleHealth-based	Resolved	Dec 10, 2023 to Jun 12, 2024
E. COLI	Resolved	Nov 23, 2023 to Dec 29, 2023
ArsenicHealth-based	Resolved	Oct 1, 2023 to Dec 31, 2023
ArsenicHealth-based	Resolved	Jul 1, 2023 to Sep 30, 2023
ArsenicHealth-based	Resolved	Apr 1, 2023 to Jun 30, 2023
ArsenicHealth-based	Resolved	Jan 1, 2023 to Mar 31, 2023
ArsenicHealth-based	Resolved	Oct 1, 2022 to Dec 31, 2022
ArsenicHealth-based	Resolved	Jul 1, 2022 to Sep 30, 2022
ArsenicHealth-based	Resolved	Apr 1, 2022 to Jun 30, 2022
ArsenicHealth-based	Resolved	Jan 1, 2022 to Mar 31, 2022
ArsenicHealth-based	Resolved	Oct 1, 2021 to Dec 31, 2021
ArsenicHealth-based	Resolved	Jul 1, 2021 to Sep 30, 2021
ArsenicHealth-based	Resolved	Apr 1, 2021 to Jun 30, 2021
ArsenicHealth-based	Resolved	Jan 1, 2021 to Mar 31, 2021

Awc - Casa Grande South Water Company

AZ0411061 · Groundwater · 176 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 →

Measurements (1)

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.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2021 to Dec 31, 2023

Violation history (3)

Imported violation history for Awc - Casa Grande South Water Company
Rule	Status	Period
LEAD AND COPPER RULE REVISIONS	Resolved	Oct 17, 2024 to Nov 7, 2024
LEAD AND COPPER RULE REVISIONSHealth-based	Resolved	Oct 17, 2024 to Nov 7, 2024
Chlorine	Resolved	Apr 1, 2021 to Jun 30, 2021

Gw Santa Cruz Water - Cp Water Co

AZ0411151 · Groundwater · 37 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 →

Measurements (1)

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.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2021 to Dec 31, 2023

Violation history (1)

Imported violation history for Gw Santa Cruz Water - Cp Water Co
Rule	Status	Period
Revised Total Coliform Rule	Resolved	Sep 1, 2023 to Feb 27, 2024

City summary

What the indexed records say

Casa Grande has 3 published ZIP profiles across Pinal County. No qualifying nearby hardness observation is available for the city.

The —–— PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard0 ZIPs

0 of 3 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: — miles
Profiles with evidence: 0/3

Confidence labels

High: 0Moderate: 0Low: 0

Observation window: unavailable to unavailable.

ZIP directory

Water reports in Casa Grande

Open a ZIP for site-level provenance and measurements.

ZIP code

85122

No estimate

—

Nearest site: — mi
Confidence: —

View full ZIP evidence →

ZIP code

85193

No estimate

—

Nearest site: — mi
Confidence: —

View full ZIP evidence →

ZIP code

85194

No estimate

—

Nearest site: — mi
Confidence: —

View full ZIP evidence →

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Arizona communities

Apache Junction

Pinal County

866 PPM median

Goodyear

Pinal County

65 PPM median

Red Rock

Pinal County

174 PPM median

Coolidge

Pinal County

— No median

Eloy

Pinal County

— No median

Florence

Pinal County

— No median

Search all 133 Arizona cities →

Questions people ask

About water in Casa Grande

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.