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Table 3 Arithmetic mean of contamination of same samples collected between 1 month intervals

From: Occurrence of Escherichia coli and faecal coliforms in drinking water at source and household point-of-use in Rohingya camps, Bangladesh

  Types First time sampling Second time (after 1 month)
Faecal coliforms Before (n = 14) 18,593 6382
After (n = 14) 13,795 5428
Household (n = 28) 15,948 7750
E. coli Before (n = 14) 3592 2210
After (n = 14) 2668 2233
Household (n = 28) 715 528