What is the Water Quality in Davis, California?
Compared to other US cities, Davis water quality ranks in the middle range for contamination excluding Lead.
Most of their 25 contaminants have cancer-causing attributes.
- Arsenic is at extremely high levels: 751x health guidelines.
- Haloacetic acids (HAA5) are at extremely high levels: 41x health guidelines.
- Haloacetic acids (HAA9) are at extremely high levels: 156x health guidelines.
- These are both byproducts of the chlorine treatment process most water supplies go through.
Let’s look closer at what’s in Davis water.
What Else is in Davis water?
Here are the top 5 chemical compounds in your water and what health issues they can potentially cause:
- Chloroform – Potential effect: Cancer
- Hexavalent Chromium – Potential effect: Cancer
- Radium – Potential effect: Cancer
- Total trihalomethanes – Potential effect: Cancer
- Uranium – Potential effect: Cancer
These are five of the 25 contaminants analyzed by the Environmental Working Group (ewg.org).
9 of these contaminants are rated as exceeding EWG Health Guidelines.
Does Davis have Lead contamination?
No, Davis does not have lead in its water. The most recent Lead samples collected in 2017 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 Davis’s water come from?
Davis’s water comes from the Tule Canal – Toe Drain watershed.
There are no EPA assessed water sources in the Tule Canal – Toe Drain watershed.
Ideally, a water source would be Assessed and 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 Davis’s water.
What Can You Do?
Information about water quality in Davis can be surprising.
But there are things you can do in your home to clean up your water.
To Remove Lead and Other Contaminants In Your Home:
There is one solution that beats Brita, PUR, and expensive whole house systems.
- It costs less per gallon.
- Needs fewer filter changes.
- And it doesn’t make your water taste weird.
- Use Berkey filters with activated carbon to filter out at least 80% of contaminants in your drinking water. (Berkey Light and Travel Berkey are the only types available in California.)
- Berkey filters can also remove up to 99.99% of any Lead in Davis water.
- Brita can filter 9 contaminants (36%) and Lead depending on the filter.
- Note: We may receive a commission if you decide to purchase filters through links on this page.
- To filter out 23 of the 25 contaminants (92%), consider a Reverse Osmosis whole house water filtration system for your home.
- These are more expensive than pitchers to purchase, but can be more effective.
- They have the benefit of filtering out heavy hitters like:
- Arsenic – health effects
- Barium – health effects
- Chloroform – health risks
- Haloacetic acids – chlorination byproduct*
- Hexavalent chromium
- Selenium – health risks
- Total trihalomethanes – byproduct of chlorination*
*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.cityofdavis.org/ to find contact information for your local officials.