Skip to main content
. 2022 Aug 1;130(8):087002. doi: 10.1289/EHP9985

Figure 2.

Figure 2 is a map of United States, marking states and tribal lands that submitted trihalomethane-4 compliance monitoring data. The states are Washington, Oregon, Idaho, Montana, North Dakota, Minnesota, Wyoming, South Dakota, California, Nevada, Utah, Arizona, New Mexico, Nebraska, Kansas, Oklahoma, Texas, Missouri, Iowa, Illinois, Indiana, Ohio, Arkansas, Kentucky, Tennessee, Pennsylvania, Virginia, North Carolina, Louisiana, Florida, New York, Vermont, Maine, Rhode Island, Connecticut, New Jersey, West Virginia, and Alaska.

States and tribal lands that submitted THM4 compliance monitoring data for calendar year 2011 and comprising Six-Year Review 3 data set (shown with shading). Data for 20,760 disinfecting systems serving a total of nearly 198 million people. See Supplemental Material Table S1 for information about number of THM4 records by system size and source water type. Map was created in R (version 4.0.0; R Development Core Team). Note: THM4, trihalomethane-4.