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Trihalomethanes (THMs), the most common of the DBPs, were first discovered in the 1970s (Bellar and Lichtenberg 1974; Rook 1974), and hundreds of DBP species have been identified since.
Tena, Fibre selection base on an overall analytical feature comparison for the solid-phase microextraction of trihalomethanes from drinking water, Journal of Chromatography A: 1139(1), 27-35 (2007).
Description of trihalomethane levels in three UK water suppliers.
The Drinking Water Inspectorate's latest annual report states: "Dwr Cymru Welsh Water consider that the adverse weather conditions (torrential rainfall) in 2007 caused a general deterioration in raw water quality, resulting in higher levels of organic matter which challenged the performance of their treatment works giving rise to more coliform and trihalomethane failures.
Researchers at the University of Memphis evaluate chemical analyzers and associated analytical methods for on-line monitoring of trihalomethane (THM) and haloacetic acid (HAA) concentrations in drinking water.
While imposed for good reason, the rule also will increase the number of trihalomethane (THM) and haloacetic acid (HAA5) compounds in drinking water samples that need to be tested.
In addition, the plant's discharge had trihalomethane levels exceeding limits set by the National Pollutant Discharge Elimination System permit program.
The conversion to monochloramine provided higher concentrations of total chlorine (which includes both free chlorine and monochloramine) and lower concentrations of trihalomethane compounds, the principal disinfection byproducts in treated water entering the distribution system (Table 1).
The injected water's trihalomethane level is well below the federal limit for drinking water, but it is above that of well water - which typically contains zero, officials say.
Minimal disinfection by-products (DBP) formation at high biocidal rate -- 30%-50% reduction in trihalomethane (THM) formation compared to traditional chlorination methods.
In Kenora, efforts are under way to reduce trihalomethane (THM) in the system.
It also highlighted poor compliance with guidance on toxic trihalomethane.
For example, EPA's regulation of trihalomethane in drinking water has an estimated cost per normalized life saved of $600,000, whereas the regulation of Atrazine/alachlor in drinking water has an estimated cost per normalized life saved of $274 billion.