Water Quality in Ontario, California
Watershed: Lower Chino Creek
What is the water quality like in Ontario, CA?
Let’s dive deeper into what’s in Ontario water.
What’s in Ontario water?
Here are the top 7 chemical compounds in your water and what health issues they can potentially cause:
- Arsenic – Potential effect: Cancer
- Bromodichloromethane – Potential effect: Cancer
- Chloroform – Potential effect: Cancer
- Haloacetic acids – Potential effect: Cancer
- Hexavalent Chromium – Potential effect: Cancer
- Nitrate – Potential effect: Cancer
- Total trihalomethanes – Potential effect: Cancer
These are seven of the 25 contaminants analyzed by the Environmental Working Group (ewg.org).
14 of these contaminants are rated as exceeding EWG Health Guidelines.
See the What Can You Do? section below for all of the contaminants you can filter out and how to do it.
Where does Ontario’s water come from?
Ontario’s water comes from the Lower Chino Creek watershed.
All 5 EPA assessed water sources in the Lower Chino Creek watershed are in Impaired condition. These include:
- Chino Creek Reaches 1A and 1B
- Mill Creek (Prado Area)
- Prado Basin Management Zone
- Prado Park Lake
Ideally, a water source would be rated in Good condition.
Whether a water source is in Impaired or Good condition refers to the quality of these uses:
- Drinking Water
- Aquatic Life
- Fish and Shellfish Consumption
Learn more from How’s My Waterway
See below for what you can do to improve Ontario’s water.
Conclusion – What Can You Do?
Information about water quality can be surprising.
But there’s no reason to lose hope. There are things you can do in your household as well as things you can do at a community level.
In Your Household:
- Use Berkey filters with activated carbon to filter out 21 of the 25 contaminants in your drinking water. (Berkey Light and Travel Berkey are the only types available in California.)
- To filter out 23 of the 25 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 – “Exposure may cause damage to the central nervous system, liver and kidneys.”
- Arsenic – health risks
- Barium – health risks in water
- Bromodichloromethane – health risks in drinking water
- Chloroform – side effects
- Chromium (total)
- DBCP – soil fumigant causing male sterility at high exposure levels.
- Dibromoacetic acid
- Dichloroacetic acid
- Haloacetic acids – chlorination byproduct*
- Hexavalent chromium – health effects
- Monobromoacetic acid
- Monochloroacetic acid
- Total trihalomethanes – byproduct of chlorination*
- Trichloroacetic acid
*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: https://www.ontarioca.gov/ to find contact information for your local officials.