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first class (i.e. Coliform organisms absent in 100 millilitres)was 98.3% which is
regarded as quite satisfactory.
The Colne Valley Water Company exercises constant supervision, and members of
the staff are on duty day and night throughout the year examining samples. All
the water supplied by this Company is chlorinated. The water supply is satisfactory
both from the Chemical and Bacteriological aspects and the supply is
considered adequate.
DRAINAGE AND SEWERAGE.
The town is drained and sewered on the separate system, excepting the older
portions of the district where it is a combined system.
The sewage is conveyed to an Irrigation Farm of 56 acres, but before it is
turned on the land it is screened and treated by means of detritus and sedimentation
tanks, and three rotary filters. Pumping is necessary for three sewers
which have their outlets at a low point on the farm. Part of the Totteridge area
drains to the Finchley Borough sewers; in the outlying areas some properties are
on cesspool drainage or domestic sewage disposal plants, and a few only have pail
closets.
SANITARY CONDITIONS AND WATER SUPPLY OF SCHOOLS.
There are in the district ten schools administered by the South Herts
Divisional Education Executive Committee, viz:- Queen Elizabeth's Boys and Girls
Grammar Schools; Ravenscroft Secondary School; Byng Road School (Junior Mixed
and Infants Departments); Christ Church School (Junior Boys and Girls, and
Infants Departments)5 The Elizabeth Allen Secondary Modern School; Grasvenor
Infants School; Underhill School (Junior Mixed and Infants Departments); St.
Andrew's Church of England School (Junior Mixed and Infants Departments) and St.
Catherine's Roman Catholic School (Junior Mixed and Infants Departments).
Inspections have been made of the sanitary conveniences; proposals are in
hand for the replacement of the last trough closet by individual water closets at
Christ Church School, Alston Road, Barnet.