City water profile

Water hardness in Mohave Valley

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

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 3
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.

Epcor - Willow Valley/king Street

AZ0408040 · Groundwater · 3,408 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, 2021 to Dec 31, 2023

Copper (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Above action level

Reported level: 3.3 mg/L
Action level: 1.3 mg/L

254% of the listed benchmark

Monitoring period: Jan 1, 2006 to Dec 31, 2008

Violation history (7)

Imported violation history for Epcor - Willow Valley/king Street
Rule	Status	Period
LEAD AND COPPER RULE REVISIONS	Unaddressed	Jul 2, 2025
ChloriteHealth-based	Resolved	Apr 1, 2025 to Apr 30, 2025
Chlorite	Resolved	Dec 1, 2022 to Dec 31, 2022
Chlorite	Resolved	Jun 1, 2022 to Jun 30, 2022
TTHM	Resolved	Oct 1, 2021 to Dec 31, 2021
Total Haloacetic Acids (HAA5)	Resolved	Oct 1, 2021 to Dec 31, 2021
Chlorine	Resolved	Jan 1, 2021 to Mar 31, 2021

Epcor - Willow Valley/lake Cimarron

AZ0408129 · Groundwater · 596 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, 2022 to Dec 31, 2024

Copper (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Above action level

Reported level: 1.4 mg/L
Action level: 1.3 mg/L

108% of the listed benchmark

Monitoring period: Jan 1, 2007 to Dec 31, 2009

Violation history (3)

Imported violation history for Epcor - Willow Valley/lake Cimarron
Rule	Status	Period
Chlorite	Resolved	Mar 1, 2023 to Mar 31, 2023
Chlorite	Resolved	Dec 1, 2022 to Dec 31, 2022
Total Haloacetic Acids (HAA5)	Resolved	Feb 1, 2022 to Apr 30, 2022

Rio Vista Ranches

AZ0408333 · Groundwater · 59 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: 0.0016 mg/L
Action level: 0.015 mg/L

11% of the listed benchmark

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

Violation history (19)

Imported violation history for Rio Vista Ranches
Rule	Status	Period
Public Notice	Resolved	Aug 2, 2025 to Oct 23, 2025
Public Notice	Resolved	Jul 30, 2025 to Oct 23, 2025
Consumer Confidence Rule	Resolved	Jul 1, 2025 to Oct 15, 2025
Public Notice	Resolved	Dec 20, 2024 to Mar 28, 2025
LEAD AND COPPER RULE REVISIONSHealth-based	Resolved	Oct 17, 2024 to Jul 7, 2025
LEAD AND COPPER RULE REVISIONS	Resolved	Oct 17, 2024 to Jul 7, 2025
Consumer Confidence Rule	Resolved	Oct 2, 2024 to Oct 7, 2025
Revised Total Coliform Rule	Resolved	Jul 1, 2024 to Jul 31, 2024
Revised Total Coliform Rule	Resolved	Jun 1, 2024 to Jun 30, 2024
Public Notice	Resolved	Jan 2, 2024 to Oct 23, 2025
Total Haloacetic Acids (HAA5)	Resolved	Jan 1, 2024 to Dec 31, 2024
TTHM	Resolved	Jan 1, 2024 to Dec 31, 2024
Public Notice	Resolved	Dec 13, 2023 to Apr 10, 2024
Chlorine	Resolved	Apr 1, 2023 to Jun 30, 2023
Chlorine	Resolved	Jan 1, 2023 to Mar 31, 2023
TTHM	Resolved	Jan 1, 2023 to Nov 14, 2023
Total Haloacetic Acids (HAA5)	Resolved	Jan 1, 2023 to Nov 14, 2023
Revised Total Coliform Rule	Resolved	Dec 1, 2022 to Dec 31, 2022
Lead and Copper Rule	Resolved	Oct 1, 2022 to Oct 12, 2023

City summary

What the indexed records say

Mohave Valley has 1 published ZIP profile across Mohave County. The regional-evidence median is 306 PPM. The city does not meet the stricter comparison standard.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 11.5 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Oct 26, 2022 to Oct 26, 2022.

ZIP directory

Water reports in Mohave Valley

Open a ZIP for site-level provenance and measurements.

ZIP code

86440

Very Hard

306 PPM

Nearest site: 11.5 mi
Confidence: Low

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

Fort Mohave

Mohave County

306 PPM median

Meadview

Mohave County

302 PPM median

Oatman

Mohave County

306 PPM median

White Hills

Mohave County

638 PPM median

Chloride

Mohave County

— No median

Dolan Springs

Mohave County

— No median

Search all 133 Arizona cities →

Questions people ask

About water in Mohave Valley

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.