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Public Health service. The use of the Public Health Laboratory
at Epsom, to which samples of milk and ice cream are sent, has
increased but is limited by the distance from the Borough.
CLINICS
Details of the clinics available in the district are given
at the end of this report.
SANITARY CIRCUMSTANCES OF THE AREA
Water Supply. The water supply is mainly derived from the
deep wells in the chalk of the Sutton District Water Company,
situated at Sutton, Cheam and Woodmansterne. A small area in
the North Ward is supplied by the Metropolitan Water Board.
The water from all wells of the Sutton District Water Company
is softened to nine degrees of hardness. Chlorine is applied in
the form of chloramine as a protective measure.
Samples of the raw and treated waters are examined daily by
the laboratory at the Sutton Works. Samples are also examined
at monthly intervals by the Company's Consultant Analyst, and
monthly samples are examined in rotation by the District Councils
in the area of supply.
The supply from all sources has been satisfactory in quality
and quantity. All the dwelling houses have a direct supply from
the public mains. Below is the average of monthly analyses.
Chemical Results in Parts per Million Average
Total Solids 188.75
Ammonia, free 0.18
Ammonia,. Albuminoid 0.00
Nitrogen in Nitrates 8.18
Nitrogen in Nitrites 0.00
Oxygen Absorbed 0.10
Chlorine in Chlorides 18.75
Hardness total (grains per gallon) 7.60
Bacteriological Results
No. of Bacteria growing on Agar per ml. for 3 days
at 20° C 2
No. of Bacteria growing on Agar per ml. for 1 day
at 37° C 0
Presence of Bacillus Coll in 100 ml. 0
Swimming Baths. Satisfactory control over residual chlorine
and pH has been maintained in the two swimming baths. Two samples
taken at peak periods of attendance gave satisfactory chemical
and bacteriological results.
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