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Water as delivered to the consumer is examined monthly by the
Counties Public Health Laboratory on behalf of the Company and
a further 11 chemical and 22 bacteriological samples were examined by
the Public Health Departments in the supply area. All were satisfactory.
The following is a representative analysis:
Chemical analysis in parts per million
Total solid matter in solution (dried at 180° C.) 180
Combined chlorine 14.2
Nitric nitrogen 4.9
Nitrous nitrogen none
Ammonia, free and saline 0.00
Ammonia, albuminoid 0.005
Oxygen absorbed from permanganate in 4 hours at 26.7° C. 0.04
Hardness—by acidimetric titration—Temporary 95
Permanent 34
Total129
Reaction for free chlorine at 4.0 p.m. on the 15th none
Iron and other metals absent
pH 7.5
The water was bright and clear and was normal in colour.
Bacteriological examination
Action by free chlorine during transit of the sample was prevented
at the time of sampling
Number of colonies per ml. developing upon agar in 2 days at 37° C. 0
Number of colonies per ml. developing upon agar in 3 days at 22° C. 3
Organisms of the coliform group absent in 100 ml.
Streptococci absent do.
CI. welchii absent do.
This water is of excellent organic purity and of moderate hardness and
salinity and is similar in chemical composition to previous samples from the
same source.
The water is attractive in appearance and free from contaminating metals.
There was no residual chlorine at the time of receipt.
The bacteriological condition is excellent and, as judged by these samples,
the water is pure and wholesome and suitable for the public supply.
The average hardness of the samples taken by all the local
authorities' Public Health Departments was 9.06°. Seven exceeded
the statutory limit of 9° and 4 were below.
Drainage and Sewerage
In addition to the routine work of cleansing sewers, soakaways
and gullies, a new foul sewer has been constructed in Devonshire
Road and a small re-arrangement made in the drainage of the properties
there.
Schemes for the alleviation of flooding in various parts of the
district are actively in hand.
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