The City of Lawrence announced Aug. 7 that a recent test showed that samples for total trihalomethanes exceeded the federal maximum contaminant level between April 1 and June 30.

Total trihalomethanes are byproducts that form when water disinfectants such as chlorine or ozone react with other naturally occurring chemicals in the water. Some people who drink TTHM in excess of the maximum contaminant level over many years can experience problems with their liver, kidneys or central nervous system, according to the announcement. They also may have an increased risk of getting cancer.

According to the announcement, the city is required to monitor drinking water for specific contaminants like TTHM to meet federal health standards.

“The results that we received for total trihalomethanes for t

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