Published: November 2023
This analysis presents the results of water tests for trichloroethylene, or TCE, that community water systems across the country conducted between 2017 and 2019. Water testing data for TCE and other contaminants were provided to EWG by state drinking water agencies and posted online in EWG’s Tap Water Database.
Information in the EWG map and analysis reflect water quality in 2019. Since that time, some of the water utilities displayed in the map may have installed additional treatment technology or changed water sources. The most up-to-date information about TCE in a specific utility’s water should be obtained directly from the water utility.
For the full methodology, click here.
Disclaimer: EWG has worked to ensure the accuracy of the information provided in this map. The map is dynamic. The contaminant site, results, suspected sources and other information in the database may change based on evolving science, new information or other factors. Please be advised that this information frequently relies on data obtained from many sources, and accordingly, EWG cannot guarantee the accuracy of the information provided or any analysis based thereon.