WATER CATCHMENT AREAS IN SCOTLAND 281 
eastern side of Cat Law, in Kingoldrum parish, Forfarshire. 
The water, which is not filtered, comes from springs in the 
side of the hill, and there is no impounding reservoir. The 
area is grazed by sheep, and is uninhabited, treeless, rocky 
ground, mostly covered with heather. It is not owned by 
the Town Council, who have the usual sanitary powers 
conferred by common law and statute. The annual rainfall, 
varying from 27 to 50 inches, averages 35°33 inches. 
Brechin obtains its water supply from a catchment area 
of 2200 acres, between 600 and 2000 feet altitude, on 
Wirren Hill, in the Grampians, all heather-clad, under 
sheep grazing, and without dwellings of any kind. There 
are no trees on the area, which is privately owned, the 
Town Council having no control and only the right to 
the water and the pipe track, which was given free by the 
owner. There is no storage reservoir, and the water is not 
filtered ; but no trouble as regards contamination has arisen 
since the supply was introduced over 43 years ago. 
Forfar obtains its water-supply from the Den of Ogil 
reservoir, in Tannadice parish, with a gathering ground 
of 2977 acres, lying between 600 and 1615 feet elevation, 
the highest point being St. Arnolds. The Corporation own 
33 acres. The gathering ground comprises 2677 acres 
of hill pasture and plantations, and 300 acres of arable 
land, on which there are 8 habitations and farm-steadings. 
The water is screened and filtered, but no other measures 
are taken against contamination. 
Dundee obtains its water supply from two catchment 
areas: (1) The gathering ground feeding the Crombie, 
Monikie, and Brax reservoirs comprises 3643 acres, all at 
no great elevation, the highest point being under 700 feet. 
The Water Commissioners, in order to preserve the water 
from contamination, have taken on a lease of 99 years 
500 acres of arable land on the Crombie area. This land, 
laid down in grass, reverts to moorland in a few years, and 
could be utilised more profitably if planted with a timber 
