Glenwood Municipal Utilities has announced a change in its treatment of the city’s drinking water supply.
Beginning in early December, GMU will begin distributing water disinfected with chloramines instead of free chlorine. GMU hopes the change will help bring the water into compliance with standards set by the Environmental Protection Agency (EPA) by decreasing the formation of disinfection byproducts such as trihalomethanes, a chemical formed in the water when chlorine or other disinfectants react with naturally occurring organic and inorganic matter.
For more than two years, Glenwood’s water has exceeded EPA standards for trihalomethanes. Testing results of Glenwood water sampled in early October showed the trihalomethane level at 0.1060 milligrams per liter (mg/L). The EPA standard is 0.080 mg/L. Glenwood’s running average for trihalomethanes over the past four quarters of testing is 0.092 mg/L.