Table 2

Characteristics of trihalomethanes and other factors in United Kingdom swimming pools

Samples (n)Arithmetric meanGeometric MeanGeometric SDMinimumMaximum
Chloroform (μg/l)24121.1113.31.545212
BDCM (μg/l)248.36.91.82.523
CDBM (μg/l)242.72.02.30.677
Bromoform (μg/l)240.90.81.50.672
TTHM (μg/l)24132.4125.21.457222.5
TOC (mg/l)246.35.81.53.312.9
Air temperature (°C)2426.926.81.122.334
Water temperature (°C)2431.131.01.127.534.5
pH247.47.41.078.13
People (n)247.15.91.9116