6 
Colorado Experiment Station 
Avenue, and Cherry Creek near Sullivan complete the filtration 
svstern. 
All of these waters, with the exception of that from Cherry 
Creek, are treated with either chlorine gas or hypochlorite. The 
total capacity of the combined plants approximates 81,000,000 
gallons of filtered water daily. The population of Denver is, in 
round numbers, 250,000; the daily water consumption varies from 
250 to 350 gallons per capita. 
A diagramatic representation of the entire system is shown 
on page 5. 
PATROL OF THE WATER SHED 
While the Denver Union Water Company is exercising every 
precaution to make the water safe for domestic purposes, it does 
not depend entirely upon the purification plants to accomplish 
this. It goes without saying that, all things being equal, the purer 
the raw water the more easily can the impurities be removed and 
the purer will be the filtered water. 
Altho the water-shed in the vicinity of Cheesman Lake is so 
sparsely settled that it will average little more than one person 
to the square mile, the Denver Union Water Company recognized 
the possible danger of pollution from this source, as well as from 
Platte Canon, and secured the passage of an ordinance which pro¬ 
vides for the protection and preservation of the purity of the 
water supply of the City and County of Denver and for the patrol 
of the water-shed, and the arrest and punishment of all persons 
who violate the provisions of the act. The ordinance covering this 
point follows:— 
