Rialto, California

What is the Water Quality in Rialto, California?

[Updated: June 12, 2023]

Compared to other US cities, Rialto water quality ranks in the very high range for contamination excluding Lead.

Most of their 44 contaminants have cancer-causing attributes.

• Arsenic is at extremely high levels: 404x health guidelines.
• Haloacetic acids (HAA5) are at high levels: 18x health guidelines.
• Haloacetic acids (HAA9) are at high levels: 34x health guidelines.
  • These are both byproducts of the chlorine treatment process most water supplies go through.
• PFOA is at extremely high levels: 52x health guidelines.
  • This is considered a “forever chemical” by the EPA and is being studied extensively.
  • Rialto water also contains PFBS, PFHPA, PFHXS, and PFHxA.
  • All of these can be filtered out with a good filter – see our recommendation below.

Let’s look closer at what’s in Rialto water.

What’s in Rialto water?

Here are the top 7 chemical compounds in your water and what health issues they can potentially cause:

1. Arsenic – Potential effect: Cancer
2. Bromodichloromethane – Potential effect: Cancer
3. Chloroform – Potential effect: Cancer
4. Haloacetic acids – Potential effect: Cancer
5. Hexavalent Chromium – Potential effect: Cancer
6. Total trihalomethanes – Potential effect: Cancer
7. Uranium – Potential effect: Cancer

These are seven of the 44 contaminants analyzed by the Environmental Working Group (ewg.org).

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

Does Rialto water have Lead contamination?

No, the most recent Lead samples collected from 2016 through 2018 showed concentrations of 0.0 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 removed.

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

Where does Rialto’s water come from?

Rialto’s water comes from the East Etiwanda Creek – Santa Ana River watershed.

3 of the 7 EPA assessed water sources in the East Etiwanda Creek – Santa Ana River watershed are in Impaired or Unknown condition. These include:

• Prado Basin Management Zone
• San Sevaine Channel
• Santa Ana River Reach 3

Ideally, a water source would be rated in Good condition. Day Creek, East Etiwanda Creek, Hole Lake, and Temescal Creek Reach 1 are all in Good condition.

Whether a water source is in Impaired or Good condition refers to the quality of these uses:

1. Drinking Water
2. Aquatic Life
3. Fish and Shellfish Consumption
4. Recreation

Learn more from How’s My Waterway

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

Conclusion – What Can You Do?

Information about water quality can be surprising.

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 can be more effective.
  • They have the benefit of filtering out heavy hitters like:
    • 1,4-Dioxane – irritant of the eyes and respiratory tract.
    • Aluminum
    • Arsenic – health risks
    • Bromodichloromethane – health risks in drinking water
    • Bromoform
    • Chloroform – side effects
    • Cobalt
    • Dibromoacetic acid
    • Dibromochloromethane
    • Dichloroacetic acid
    • Fluoride
    • Haloacetic acids – chlorination byproduct*
    • Hexavalent chromium – health effects
    • Molybdenum
    • Monobromoacetic acid
    • MTBE – fuel additive to increase knock resistance and reduce unwanted emissions.
    • Nitrate
    • Nitrite
    • Perchlorate – risks
    • PFOA, PFBS, PFHPA, PFHXS, and PFHxA
    • Strontium
    • Tetrachloroethylene (perchloroethylene)
    • Toluene
    • Total trihalomethanes – byproduct of chlorination*
    • Trichloroacetic acid
    • Uranium
  • Our recommendation: APEC Reverse Osmosis Systems

*Chlorination is an effective method of disinfecting/treating drinking water. You can then use a water filter to reduce the effects of chlorination byproducts to get the safest, cleanest water possible.

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: http://www.yourrialto.com/ to find contact information for your local officials.

Water Quality in Other California Cities

California Water Quality Page