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Examinations repeated because of first
report being unsatisfactory (49 in number).
Returned to accepted standard within
days
7 14 21 28 3542 49 59
(a) Where water
main damage
(14 in number)
21331211
(b) Where no
ascertained
water main
damage (35
in number) 16 8 8 2 1 — — —
The first point is the complete absence of
faecal coli in every case. Secondly, the nonfaecal
coli counts are small and thirdly the
plate counts indicate that some disturbance occurs
on war damage and a bomb near a water main appears
to disturb it in some manner so that it took three
weeks for 91.4% of the water in such pipes to
return to normal, while where the main was
actually damaged, only 43% of the water became
normal in that time.
Amongst the 14 cases of water main damage,
11 of the samples showed coli Mac Conkey; 3 did
not, i.e. 3.6 in 1, while, in those 35 cases
22.