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Table 1 Contamination of water samples taken from pipe, narrow and wide opening containers with E. coli

From: Microbial contamination of water intended for milk container washing in smallholder dairy farming and milk retailing houses in southern Ethiopia

Sampling points N positive % positive* Mean Median IQR**
Directly from pipe (n = 18) 1 5.6 3.0 3.0 0
Narrow mouth container (n = 46) 20 43.5 8.0 6 12.5
Wide mouth container (n = 15) 10 66.7 8.5 6.5 8.0
Total 31 39.2 8.0 6.0 12.0
  1. * Chi square = 13.64, p value = .001; ** IQR interquartile range