Water Quality in Norwalk, California
Watershed: Coyote Creek – San Gabriel River
What is the water quality like in Norwalk, CA?
Let’s dive deeper into what’s in Norwalk water.
What’s in Norwalk water?
Here are the top 5 chemical compounds in your water and what health issues they can potentially cause:
- Arsenic – Potential effect: Cancer
- Bromodichloromethane – Potential effect: Cancer
- Haloacetic acids – Potential effect: Cancer
- Hexavalent Chromium – Potential effect: Cancer
- Total trihalomethanes – Potential effect: Cancer
These are five of the 26 contaminants analyzed by the Environmental Working Group (ewg.org).
16 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 Norwalk’s water come from?
Norwalk’s water comes from the Coyote Creek – San Gabriel River watershed.
10 of the 12 EPA assessed water sources in the Coyote Creek – San Gabriel River watershed are in Impaired or Unknown condition. These include:
- Artesia-Norwalk Drain
- Coyote Creek
- El Dorado Lakes
- Los Alamitos Channel
- San Gabriel River Estuary
- San Gabriel River Reaches 1, 2, and 3
- Zone Ditch 1
Ideally, a water source would be rated in Good condition. Maplewood Channel and San Jose Creek are 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 Norwalk’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 26 contaminants in your drinking water. (Berkey Light and Travel Berkey are the only types available in California.)
- To filter out 23 of the 26 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
- Dibromoacetic acid
- Dichloroacetic acid
- Haloacetic acids – chlorination byproduct*
- Hexavalent chromium – health effects
- Perfluorooctane sulfonate (PFOS)
- 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.norwalk.org/ to find contact information for your local officials.