South San Francisco, California

What is the Water Quality in South San Francisco, California?

Compared to other US cities, South San Francisco water quality ranks in the high range for contamination excluding Lead.

Most of their 35 contaminants have cancer-causing attributes.

• Arsenic is at extremely high levels: 430x health guidelines.
• Haloacetic acids (HAA5) are at extremely high levels: 271x health guidelines.
• Haloacetic acids (HAA9) are at extremely high levels: 335x health guidelines.
  • These are both byproducts of the chlorine treatment process most water supplies go through.

Let’s look closer at what’s in South San Francisco water.

What’s in South San Francisco water?

Here are the top 5 chemical compounds in your water and what health issues they can potentially cause:

1. Arsenic – Potential effect: Cancer. High levels present.
2. Chloroform – Potential effect: Cancer
3. Hexavalent Chromium – Potential effect: Cancer
4. Haloacetic acids (HAA5) – Potential effect: Cancer
5. Total trihalomethanes – Potential effect: Cancer

These are five of the 35 contaminants analyzed by the Environmental Working Group (ewg.org).

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

Does South San Francisco have Lead contamination?

No, South San Francisco does not currently have lead in its water. The most recent Lead samples collected from 2015 through 2017 showed concentrations up to 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 South San Francisco’s water come from?

South San Francisco’s water comes from the Colma Creek – Frontal San Francisco Bay Estuaries watershed.

Two of the four EPA assessed water sources in the Colma Creek – Frontal San Francisco Bay Estuaries watershed are in Impaired or Unknown condition. These are:

• Colma Creek
• Coyote Point Marina

Ideally, a water source would be rated in Good condition. Coyote Point County Park and Easton Creek are 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 South San Francisco’s water.

What Can You Do?

Information about water quality in South San Francisco 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 93% 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 South San Francisco water.
  • Brita can filter 17 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 31 of the 35 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:
    • Aluminum
    • Antimony
    • Arsenic
    • Barium – toxicity
    • Beryllium
    • Bromodichloromethane
    • Cadmium
    • Chloroform
    • Fluoride
    • Haloacetic acids
    • Hexavalent chromium
    • Mercury – toxicity and safety
    • Nitrate
    • Selenium
    • Strontium
    • Thallium
    • Total trihalomethanes – byproduct of chlorination*
    • Uranium
    • And 11 more contaminants.

*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.ssf.net/government to find contact information for your local officials.

Water Quality in Other California Cities

California Water Quality Page