Community Water Center

Community-driven water solutions through organizing, education, and advocacy

News Release: California Water Board Takes Step To Protect Public From Cancer-Causing Water Contaminant

July 20, 2016

Asha Kreiling, Policy & Communications Analyst, Community Water Center

Andria Ventura, Toxics Program Manager, Clean Water Action
415-369-9166 (o), 408-537-3460 (c),      

Regulators propose a health-protective legal limit for the carcinogen “TCP”

Sacramento, CA – This morning, California regulators took an important step toward protecting California communities from a highly toxic drinking water contaminant found across the state, say environmental justice advocates.

At its first public workshop on the pesticide byproduct 1,2,3-Trichloropropane (TCP), Division of Drinking Water staff shared a preliminary proposal to set the TCP drinking water standard at the Detection Limit, which is 5 parts per trillion. Five parts per trillion (ppt) is the most health-protective standard possible. Setting the standard at this level would help protect the lives of hundreds of thousands of Californians who currently drink water contaminated by 123 TCP.

“Residents living in communities impacted by TCP contaminated water continue to worry about the health impacts of this known carcinogen, so we’re glad that the Board has started out on the right track by prioritizing health and safety and setting the standard at 5 ppt,” said Asha Kreiling, Policy and Communications Analyst at the Community Water Center.

TCP is a toxic, man-made chemical contaminating at least 94 public drinking water systems across California, including Fresno, Bakersfield, Tulare, and many other Central Valley communities. The State of California declared TCP a carcinogen over 15 years ago, but TCP remains unregulated and untreated because it lacks a drinking water standard, or Maximum Contaminant Level (MCL).

Most TCP contamination stems from the extensive application of pesticides containing TCP that were manufactured by Shell Oil and Dow Chemical Company prior to the 1990s. Despite the companies’ knowledge of the health risks, they failed to remove the ingredient from their products or notify farmers and communities of the known health risks. Some public water systems have already received payment through cost-recovery litigation against Shell Oil and Dow Chemical Company, but many are waiting until the drinking water standard is established to settle their lawsuits and begin treatment for this toxin.

“This was an avoidable problem caused by two multinational companies who chose to protect their profits instead of human health,” said Andria Ventura, Toxics Program Manager at Clean Water Action. “By proposing the most protective standard possible, the Division of Drinking Water is prioritizing both public health and environmental justice, since communities can hold companies accountable for TCP water treatment costs.”

The State Water Resources Control Board will be holding additional public workshops in Bakersfield and Fresno next week to discuss the development of the drinking water standard. The Board has encouraged community members to attend to learn more about TCP and the MCL development process, and to share their initial questions and feedback.

“We are thrilled with this initial proposal from Board staff, and we will continue watching the process and working alongside impacted communities to ensure that the State Water Board prioritizes public health over corporate profits by adopting the 5 ppt drinking water standard as soon as possible,” Kreiling said.


About The Community Water Center

The Community Water Center (CWC) is a non-profit environmental justice organization based in California’s San Joaquin Valley, whose mission is to act as a catalyst for community-driven water solutions through organizing, education, and advocacy. CWC’s fundamental goal is to ensure that all communities have access to safe, clean, and affordable water. CWC helps build strategic grassroots capacity to address water challenges in small, rural, low-income communities and communities of color. For more information, visit CWC’s website at www.communitywatercenter.organd follow us on Twitter at @CWaterC.

About Clean Water Action

Clean Water Action is a national organization, founded in 1972, that has 50,000 members in California and over one million nationwide. We empower people to take action to protect water resources, build healthy communities, and make democracy work. Visit us at and follow us on Twitter at @cleanh2oaction.


Like us to spread the word

Related News & Resources

State Water Board Adopts Human Right to Water Resolution!

The February 16th, 2016, State Water Resources Control Board meeting was a momentous day for the Board, the Division of Drinking Water, water justice advocates, and all the communities that...

Arvin City Council Adopts Resolution for Health-Protective 1,2,3-TCP MCL!

  Arvin City Council   At their last meeting on September 6, 2016, the Arvin City Council passed and adopted a resolution that "affirms its commitment to promote and encourage...

Protecting Californians from Cancer-Causing Water Contaminant “1,2,3-TCP”

We’re thrilled that State Water Board staff just announced their preliminary recommendation to set the most health-protective legal limit for the pesticide byproduct 1,2,3-TCP in drinking water! CWC's 1,2,3-TCP campaign...

California State Water Board holds meeting in Bakersfield about high levels of 1,2,3 TCP in the water

By Jessica Harrington July 26, 2016 Original Story: BAKERSFIELD, Calif. - The State Water Board held a public workshop in Bakersfield Tuesday on the pesticide byproduct 1,2,3-Trichloropropane (TCP).  The workshop...

State workshop informs water users 117 Kern County wells have levels of TCP

By Anne Di Grazia July 26, 2016 Original story:   It was once classified as a "safe" pesticide by Central Valley farmers and an "okay" cleaning product. But 1-2-3 TCP...

More News