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WATER SUPPLY.
The major area of the district is supplied with water from the mains
of the Bamet District Water Company, and the remainder is served by the
Colne Valley Water Company.
All water supplied by the Barnet District Water Company is
chlorinated. A pathological staff is maintained and the water is
regularly tested at all stages. During the year, a total of 1,720
bacteriological and 244 chemical examinations of the water were made by the
Company's own staff, 1,394 of these samples were representative of the
supply and 99.8% were found to be free from B.Coli.
The Colne Valley Water Company exercises similar controls over its
supplies. Five samples of water were taken by the Department, four
from Barnet District Water Company's supply and one from the Colne Valley
Water Company's supply, and submitted for analysis with satisfactory
results in every case.
The water supply to the whole district is considered adequate, and all
houses are supplied by these companies mains. One house previously
reported as not being supplied with mains water, has now been connected to
the corapany's service, but a further cottage was found, during the year, to
be using well water.
PEONAGE 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 a Sewage Disposal works of 56 acres, where it is screened,
grit removed in detritus tanks, thence to primary settlement tanks and thereafter
distributed over three 80 ft, diameter bacteria filters, followed by
humus removal in rectangular tanks before discharge to the Dollis Brook.
Pumping is necessary for three sewers which have their outlets at a low
point on the works. 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.