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For the information of all concerned I am including in this
report, however, the position existing at the present time,
namely, June, 1947, at which time the condition of the stables
already mentioned had been rectified.
Chlorination came into operation in May. In order to show
the improvement effected by this means I append details of the
Bacteriological Counts after repair of the drain but before
chlorination, and after chlorination.
Before Chlorination—21-3-47 Faecal Coli.
Stream leading to reservoir, northern end 18,000+ per 100 ml.
Bathing pool off jetty 10,000+ per 100 ml.
Reservoir lake, near beach. 350 per 100 ml.
Reservoir lake, far beach 1,000 per 100 ml.
After Chlorination—15-5-47. Faecal Coli.
Reservoir lake, above chlorinator 110 per 100 ml.
Extreme northern end of lake,
after chlorinator Less than 1 per 100 ml.
Bathing pool off jetty Less than 1 per 100 ml.
East side of lake Less than 1 per 100 ml.
South east corner of reservoir, near beach 1 per 100 ml.
Bathing was again permitted during the Whitsun holidays
from 24th May, and samples were again taken with the following
results :—
After Bathing—27-5-47.
Water from stream above chlorinator 11 per 100 ml.
Extreme northern end of lake, after
chlorinator 35 per 100 ml.
Bathing pool off jetty 2 per 100 ml.
East side of lake 11 per 100 ml.
South east corner near beach 8 per 100 ml.
At no time was any pathogenic organism found.
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