Does Lake Havasu City Have Hard Water? What to Know (and What to Do About It)

If your glasses come out of the dishwasher spotty or your showerhead keeps crusting over with white buildup, the water is probably the reason. Lake Havasu City water hardness averaged 19.23 grains per gallon in Mohave County’s 2024 water quality report, and water above 10.5 grains per gallon counts as very hard. Here’s what that number means, how to check your own tap, and what to do about it.

What Hard Water Actually Is

Hard water carries dissolved calcium and magnesium. Hardness is usually reported in grains per gallon (gpg) or parts per million (ppm), and one grain per gallon equals about 17.1 ppm.

On the common scale, water is soft below 1 gpg, slightly hard from 1 to 3.4, moderately hard from 3.5 to 6.9, hard from 7 to 10.4, and very hard above 10.5. Hard water isn’t generally considered a health concern, but the minerals leave scale on fixtures, inside pipes, and in water heaters.

Why Lake Havasu City Water Is So Hard

The city’s water comes from Colorado River entitlements and wells that draw from the connected aquifer, according to its 2025 Water Master Plan. As the river moves through mineral-rich rock, it dissolves calcium and magnesium and carries them downstream.

Heat then does its part. Warming water makes dissolved minerals settle out as scale, which is why water heaters and kettles show the damage first. Published numbers differ by source, neighborhood, and year, so treat 19 gpg as a starting point and test your own tap.

3 Ways to Check Your Own Water Hardness

Testing is simple, and there are three common ways to do it.

1. Use a Water Hardness Test Kit

Hardware stores sell test strips and drop-count kits. Fill a clean cup from the cold tap, follow the kit’s directions, and compare the result to the chart. Note whether the reading is in grains per gallon or parts per million before you compare it to the scale above.

2. Read Your Utility’s Water Quality Report

Water providers publish annual quality reports, and the county report above notes that the city’s report is also available on the city’s website. Those figures are averages across the system, so they won’t match every tap exactly, but they’ll give you a rough idea of where your water stands.

3. Ask a Plumber to Test It

A plumber can test your water on site and tell you what the number means for your equipment. That’s useful when you’re sizing a softener or deciding whether treatment makes sense.

Signs Hard Water Is Affecting Your Home

Once you know your number, the next question is whether the water is already causing trouble. These are the usual clues:

• White, crusty buildup: Chalky deposits around faucets and showerheads are dried minerals.
• Spotty dishes and glasses: Mineral residue stays behind as water evaporates.
• Slow water flow: Scale can narrow aerators and showerheads over time.
• A noisy water heater: Sediment collects on the bottom of the tank and on heating elements.

Our post on the impact of hard water on plumbing fixtures covers these problems in more detail.

How to Treat Hard Water

Treatment depends on how hard your water is and how much of the house you want to protect.

Water Softeners

A salt-based softener removes calcium and magnesium by swapping them for sodium, which stops scale before it forms. Set the unit’s hardness setting to your tested number rather than a guess. Our guide on whether to invest in a water softener walks through the tradeoffs.

Filtration Versus Softening

A sediment or carbon filter improves taste and removes particles, but it doesn’t remove hardness on its own. A reverse osmosis unit can reduce minerals at a single drinking tap, while a whole-home setup protects every fixture. You can compare water softener and filtration options based on what you want to protect.

Water Heater Protection

Scale hits the water heater hardest, so it’s worth giving that appliance extra attention. Regular tank flushing helps clear sediment, and our tips on extending the life of your water heater explain how.

Talk to a Local Plumber About Your Water

Air Control Home Services is a family-owned company that has served Mohave County since 1990, and our plumbers provide water softener and water filtration services. Contact us today to ask about testing your water and choosing the right treatment for your home.

Frequently Asked Questions About Lake Havasu City Hard Water

Is 17 gpg considered hard water?

Yes. Water above 10.5 gpg is classified as very hard, so 17 gpg is well into that range. At that level, scale buildup on fixtures, pipes, and water heaters is common without treatment.

How do I find out my water hardness level?

Use a hardness test kit or test strips from a hardware store, check your water provider’s annual quality report, or ask a plumber to test it. Take the sample from a cold tap, and note whether the result is in grains per gallon or parts per million.

Is Arizona water hard or soft?

Water in much of Arizona is hard to very hard, especially where it comes from the Colorado River or the aquifers connected to it. Lake Havasu City’s supply is a good example, with hardness averaging about 19 gpg in the county’s 2024 report.