Modesto, California

Modesto, California Modesto, California

Water Quality in Modesto, California

Watershed: Town of Riverdale Park – Tuolumne River

What is the water quality like in Modesto, CA?

Let’s dive deeper into what’s in Modesto water.

What’s in Modesto 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 36 contaminants analyzed by the Environmental Working Group (ewg.org).

17 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 Modesto’s water come from?

Modesto’s water comes from the Town of Riverdale Park – Tuolumne River watershed.

All 3 EPA assessed water sources in the Town of Riverdale Park – Tuolumne River watershed are in Impaired or Unknown condition. These include:

  • Jacobson Drain – Unknown
  • Lateral Drain 5 – Unknown
  • Lower Tuolumne River – Impaired. Don Pedro Reservoir to San Joaquin River.

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:

  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 Modesto’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 31 of the 36 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 Lead in Modesto water.
    • Brita can filter 15 contaminants (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 30 of the 36 contaminants in your whole house, consider a Reverse Osmosis 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:

*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.modestogov.com/ to find contact information for your local officials.

Water Quality in Other California Cities

California Water Quality Page

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