Water quality parameters including TOC, UV(254), pH, chlorine dosage, bromide concentration
and disinfection by-products were measured in water samples from 41 water treatment
plants of six selected cities in China. Chloroform, bromodichloromethane, dibromochloromethane,
dichloroacetic acid and trichloroacetic acid were the major disinfection by-products
in the drinking water of China. Bromoform and dibromoacetic acid were also detected
in many water samples. Higher concentrations of trihalomethanes and haloacetic acids
were measured in summer compared to winter. The geographical variations in DBPs showed
that TTHM levels were higher in Zhengzhou and Tianjin than other selected cities.
And the HAA5 levels were highest in Changsha and Tianjin. The modeling procedure that
predicts disinfection by-products formation was studied and developed using artificial
neural networks. The performance of the artificial neural networks model was excellent
(r > 0.84).