Skip to main content

Table 3 Air concentrations of trichloramine at the different swimming pool facilities

From: Early life swimming pool exposure and asthma onset in children – a case-control study

  Swimming pool   NCl3 (mg/m3) Hours Proportion
Municipality identification number N Mean SD Median Min-Max Na %b
Kiruna 1 11 0.290 0.151 0.260 0.100 0.550 52,426 18.2%
Luleå 1 8 0.269 0.095 0.275 0.160 0.370 49,781 17.2%
Luleå 2 8 0.051 0.021 0.045 0.030 0.090 41,979 14.5%
Luleå 3 8 0.143 0.027 0.145 0.100 0.170 30,305 10.5%
Luleå 4 8 0.149 0.029 0.145 0.120 0.190 10,092 3.5%
Piteå 1 8 0.066 0.038 0.050 0.020 0.110 35,866 12.4%
Piteå 2 8 0.058 0.013 0.055 0.040 0.080 22,403 7.8%
Piteå 3 8 0.089 0.011 0.090 0.070 0.100 15,772 5.5%
Piteå 4 10 0.197 0.052 0.189 0.133 0.281 2529 0.9%
Otherc   77 0.152 0.110 0.120 0.020 0.550 27,658 9.6%
  1. N Number of measurements at each swimming pool facility
  2. aThe total number of hours spent in indoor swimming pools until age 15 by children in the study
  3. bProportion of the total number of hours spent in indoor swimming pools until age 15 by children in the study
  4. cData for four “other” swimming pool facilities where no air concentration measurements were available are based on the 77 samples collected at the nine participating facilities with objective data