I recently saw a program which covered this job and it seemed quite important.
From this site:
http://www.haworth-village.org.uk/history/urban-council/1881-1890.asp1st July, 1884
"The Waterworks superintendent reported that he had received Dr Atkinson's report on the samples of water from Hough reservoir sent to be analysed, which report was considered satisfactory by the Board.
It was resolved that the water be turned off every weekday from 6.30 in the evening until 12 o'clock next day, and from 1.30 in the afternoon until 5 o'clock in the evening, with the exception of Mondays when the water shall be turned on from 8 to 9 o'clock in the morning extra. That on Sundays the water be turned on from 12 o'clock to 2 o'clock in the afternoon only.
That the Bellman be instructed to cry through the district cautioning consumers against wasting the water, and that the Waterworks Superintendent makes inquiries respecting putting fish into the Hough reservoir."