Casa Grande, Arizona

What is the Water Quality in Casa Grande, Arizona?

[Updated: June 10, 2023]

Compared to other US cities, Casa Grande water quality ranks in the middle range for contamination excluding Lead.

Most of their 21 contaminants have cancer-causing attributes.

• Arsenic is at extremely high levels: 1,167x health guidelines.
• Radium is at high levels: 6.6x health guidelines.

Let’s look closer at what’s in Casa Grande water.

What’s in Casa Grande water?

Here are the top 5 chemical compounds in your water and what health issues they can potentially cause:

1. Arsenic – Potential effect: Cancer
2. Hexavalent Chromium – Potential effect: Cancer
3. Haloacetic acids (HAA5) – Potential effect: Cancer
4. Radium – Potential effect: Cancer
5. Total trihalomethanes – Potential effect: Cancer

These are five of the 21 contaminants analyzed by the Environmental Working Group (ewg.org).

10 of these contaminants are rated as exceeding EWG Health Guidelines.

Does Casa Grande have Lead contamination?

Yes, Casa Grande has lead in its water. The most recent Lead samples collected from 2014 through 2016 showed concentrations up to 1.0 parts per billion (ppb).

The legal limit for lead is 15 parts per billion. Being well-below this level is a good thing.

• Concentrations between 3.8 ppb and 15 ppb put a formula-fed baby at risk of elevated blood lead levels. Read more about the symptoms of Lead in water.

There is no safe level of lead for humans.

• The good news is that 99.99% of the lead can be filtered out.

See the What Can You Do? section below to learn how to filter out contaminants.

Where does Casa Grande’s water come from?

Casa Grande’s water comes from the North Branch Santa Cruz Wash watershed.

There are No assessed water sources in the North Branch Santa Cruz Wash watershed.

Ideally, a water source would be Known and rated in Good condition.

Learn more from How’s My Waterway

See below for what you can do to improve Casa Grande’s water.

Conclusion – What Can You Do?

Information about water quality in Casa Grande can be surprising and downright scary.

But there are things you can do in your home to clean up your water.

1. Test Your Water using Varify Home Test Kits or similar.
2. To Remove Lead and Other Contaminants In Your Home:

• Use Activated Carbon filters to remove most contaminants in your drinking water.
  • Faucet-mount filters work better than pitchers.
  • PUR and Brita are low-cost and effective.

• To filter out even more contaminants, consider a Reverse Osmosis water filtration system for your house.
  • These are more expensive than pitchers to purchase, but are much more effective.
  • They have the benefit of filtering out heavy hitters like:
    • Arsenic
    • Barium
    • Fluoride
    • Germanium
    • Haloacetic acids (HAA5 and HAA9)
    • Hexavalent chromium
    • Molybdenum
    • Nitrate
    • Nitrite
    • Radium
    • Selenium
    • Strontium
    • Total trihalomethanes
  • Our recommendation: APEC Reverse Osmosis Systems

In Your Community:

Contact your local government officials and put pressure on them to invest in cleaner waterways and upgraded city water filtration and treatment.

Go to: https://casagrandeaz.gov/ to find contact information for your local officials.

Water Quality in Other Arizona Cities

Arizona Water Quality Page