Word: thms
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Dates: during 1990-1999
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...Harvard tests, conducted last Thursday by New England Chromochem, confirmed earlier tests by Cambridge officials which showed that the levels of trihalomethanes (THMs) in the water posed no danger to city residents. Levels of THMs--which are known to cause cancer in certain laboratory animals--in the water had exceeded the EPA maximum from July, 1988 to December...
Cusack said Cambridge has recently modernized its water system to cut the level of THMs, which form when chlorine added to water to kill dangerous bacteria reacts with organic material, such as leaves and wood. Recent changes to the system include adjustments in the filtering process and a switch to non-chlorine based chemicals, Cusack said...
...January, the city Water Department sent letters to customers telling them that levels of THMs in water exceeded EPA limits from July, 1988 through December, 1989. But last month, dean of the College L. Fred Jewett '57 told house masters that Harvard had already tested campus water and found it safe, according to Dowling...
...letter, the water department told customers that the levels of THMs in the water are currently acceptable. Harvard is testing the water to double check the city's results...
Because the water department told customers about the high levels of THMs later than the date specified in state regulations, a fine of $10,000 was levied on the city...