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Mohave County water quality report

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Lake Havasu City

2025 annual report; individual sample dates shown

Lake Havasu City public water system AZ04-08-022. These results do not represent Kingman, Bullhead City, other Mohave systems or private wells.

Your water at a glance

See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.

Hardness

Very hard

18–20gpg

Reported range; average 19 gpg

About 308–342 mg/L as CaCO₃.

2025View source

Chlorine

Below disinfectant limit

0.78mg/L

Reported result; range 0.36–1.16

4 mg/L MRDL

2025View source

Total dissolved solids

Above aesthetic guideline

753mg/L

Average; range 702–787

500 mg/L aesthetic guideline

Aesthetic guideline, not a health-based limit; softening does not remove all dissolved solids.

2025View source

Arsenic

Below listed limit

4.1µg/L

Running annual average; range 3.4–4.9

10 µg/L MCL

2025View source

Total trihalomethanes

Below listed limit

59.44µg/L

Highest running annual average; range 52–67

80 µg/L MCL

2025View source

Haloacetic acids (HAA5)

Below listed limit

8.01µg/L

Highest running annual average; range 6–10.6

60 µg/L MCL

2025View source

Water hardness by provider

The figures below are provider-specific. They are not a countywide average.

UtilityHardnessHardness source
18–20 gpg · very hard2025 annual report
View Full Water ReportOpen the measured results, dates, comparisons and original utility report.

The numbers behind your report

Selected results with the original sampling dates and measurement basis. Open the utility report for every parameter, notice and footnote.

Open the complete utility report ↗

What was measuredReported amountSample year / source dateHow to read it
Hardness18–20 gpgReported range; average 19 gpg2025View source ↗Very hardAbout 308–342 mg/L as CaCO₃.
Chlorine0.78 mg/LReported result; range 0.36–1.162025View source ↗Below disinfectant limit4 mg/L MRDL
Total dissolved solids753 mg/LAverage; range 702–7872025View source ↗Above aesthetic guidelineAesthetic guideline, not a health-based limit; softening does not remove all dissolved solids.
Arsenic4.1 µg/LRunning annual average; range 3.4–4.92025View source ↗Below listed limit10 µg/L MCL
Total trihalomethanes59.44 µg/LHighest running annual average; range 52–672025View source ↗Below listed limit80 µg/L MCL
Haloacetic acids (HAA5)8.01 µg/LHighest running annual average; range 6–10.62025View source ↗Below listed limit60 µg/L MCL
Fluoride0.78 mg/LReported resultJanuary 2023View source ↗Below listed limit4 mg/L MCL
Nitrate (as nitrogen)1.6 mg/LReported sample result or rangeJanuary 2025View source ↗Below listed limit10 mg/L MCL
Lead3.1 µg/L90th percentile; one sample above the listed action levelSeptember 2023View source ↗Review individual results15 µg/L action level
PFOS2.4 ng/LAverage; range 2.2–2.6March–December 2025View source ↗Dated PFAS resultA result for one PFAS compound, not a blanket PFAS rating.

In drinking water, ppm ≈ mg/L, ppb ≈ µg/L and ppt ≈ ng/L. Calculated hardness in grains per US gallon (gpg) = mg/L as CaCO₃ ÷ 17.118, rounded to one decimal. ND means below the reporting limit, not zero.

MCL is an enforceable contaminant limit; MRDL is a disinfectant limit. A secondary guideline concerns aesthetics. TTHM/HAA5 compliance uses locational running annual averages; read the utility’s notices as well as individual results.

PFAS results are compound-specific. Source monitoring, entry-point samples and tap tests are different. A detected result does not identify every PFAS compound or establish the level at your home. Read the original report for context and current utility notices. EPA PFAS benchmarks and implementation ↗

Hardness source ↗USGS hardness classification ↗

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Source water. Groundwater wells drawing from the Colorado River aquifer; city treatment includes disinfection and arsenic/manganese treatment.

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More about your local water

What this means for your home

The Lake Havasu City report gives a measured hardness range of 18–20 grains per gallon.

Mohave County includes separate utilities in Lake Havasu City, Kingman and Bullhead City as well as small systems and private wells. The Lake Havasu results apply only to that city’s public water system. Water softening addresses hardness minerals; it does not remove all dissolved solids.

Filter vs. softener: what each doesPlan installation with your plumber

A useful local question

Does Mohave County need both a filter and a softener?

For Lake Havasu City customers, the reported very hard water supports a softener recommendation for scale alongside filtration matched to the home’s goals. Use a current hardness test for settings. Customers of other Mohave utilities should use their own provider’s report.

Sources and methodology

We keep each utility’s results separate, show the reported sample year, and distinguish averages, maxima and tap-sampling percentiles. Hardness classifications use USGS ranges. Missing data stays unknown.

Different name on your water bill?

The systems covered here publish separate reports. Use the official links to confirm your utility and system. If yours is not listed, choose Other / not sure.

Sources reviewed November 8, 2026. Individual sample years are shown with each result.

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