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Is your water system impacted by TCP contamination?

Since California adopted stringent regulations in 2017, many water systems have faced the challenge of managing 1,2,3-trichloropropane (TCP) in their water supplies. The State's regulation limits TCP levels in drinking water to 5 parts per trillion (ppt), a standard that has been difficult for many water providers to meet. From schools and community water systems to large utilities, all may experience financial and logistical burdens in treating this harmful chemical.

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Questions we can help you answer

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What should a water system do once it discovers TCP contamination?
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What steps can be taken if the source of contamination is unclear?
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What treatment methods are available for removing TCP?
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How much does it cost to build and maintain plants to treat the water?
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How can water systems recover the costs of treating TCP without burdening constituents?
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Are there statutes of limitations that affect how long water systems can wait to take legal action?

Recent Success Stories

Through our work, we’ve secured major settlements for water systems, schools, and businesses impacted by TCP contamination. These results demonstrate our commitment to ensuring that the responsible parties—not community members—should bear the costs of water cleanup.

Sunny Slope Water Company
Recovered the costs of TCP contamination, ensuring that the cleanup burden wasn’t passed on to ratepayers.

Golden State Water Company
Secured funds to cover the costs of building two new water treatment plants and other contamination response costs, protecting customers from the financial burden.

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These victories, and many others, highlight how we help communities recover from the devastating impacts of water contamination while holding the polluters accountable.

Read our success stories

Since 2018 alone, SL has obtained more than $150 million in legal settlements for water systems, schools, and agribusinesses affected by TCP contamination in their water.

McSwain Union Elementary School DistrictBallico Cressey School District
City of Oceanside
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What is TCP, and why is it a problem?

TCP is a human-made chemical that has contaminated groundwater throughout California, particularly in areas with a history of agricultural use. From the late 1940s through the 1980s, large chemical companies like Shell and Dow produced pesticides containing TCP, which were used to combat nematodes that harmed crops like citrus. These chemicals were widely used by farmers, who were unaware of the risk they posed to groundwater and public health.

The financial burden of TCP contamination

Treating TCP contamination is costly. In many cases, water systems face treatment costs up to millions of dollars. For these systems, legal action against the manufacturers of TCP-containing pesticides may be the best option to recover cleanup costs. The good news? These lawsuits can help water systems avoid passing those costs onto their ratepayers.

Guiding your water system through the TCP challenge

At SL Environmental, we have spent the past 5+ years helping water systems, agribusinesses, and schools navigate the complex legal and technical aspects of TCP contamination. Our goal is to work alongside you and guide you through the process, helping you understand your legal options and the next steps for treatment and recovery.

How we can help

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Stay up-to-date

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Regulatory updates
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Insight into upcoming regulation
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Stay current on regulations' impact on your water system
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Work with leading water treatment experts to identify available options and endeavor to recover the expenses
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Collaborative strategy

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Assist in identifying the water contaminant origin
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Investigate potential claims to determine strategy and assess if litigation is the best course of action
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Help develop an effective communication strategy to address ratepayers' concerns
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We do the heavy lifting

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Efficiently handle the burdensome paperwork for you
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Streamlined process due to our deep understanding of water contamination cases
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Exclusive focus on water contamination ensures extensive legal knowledge and unwavering support
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No upfront costs

We provide our services on a contingency fee basis. This allows water systems to retain us without any upfront or ongoing fees or litigation costs.

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Unmatched water litigation experience

We have 20+ years of experience, exclusively representing water suppliers in contamination cases, including 1,2,3-TCP, MTBE, p-CBSA, PCE, PCBs, and PFAS. The polluters we aim to hold accountable know that we are highly experienced in our field.

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Less work for your organization

Our water litigation experience in TCP cases allows us to be time efficient, both preparing for and during the lawsuit.

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Recover costs while protecting your community

We go after the big corporations that manufactured the contaminants, protecting both ratepayers and local communities.

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“The SL team is organized and highly knowledgeable about water contamination issues. If any question came up, they immediately had the answer. Bottom line, we achieved what we set out to do — win.”

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Ken Tcheng

GM, Sunny Slope Water Company