Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for London County Council]
Table 5. Particulars as to the working of the Septic Tanks.
|No.||Name of town or district.||Name or number of tank.||Dates between which the tank was in use.||Length of time during which the tank was used. "Weeks.||Rate of flow of sewage through the tank. Gallons per day.||Quantity of sewage passed into the tank. Gallons.||Quantity of sludge left in the tank. Tons.||Percentage of moisture in the sludge left in the tank.||Percentage reduction in the amount of sludge effected by septio action|
|22||Huddersfield||22 July, 1900, to 29 May, 1901||44||50,000 (about)||15,232,000||107.88||91.3||38|
|23||Hyde||...||l||Jane, 1899 to 1902||3 years||75,000||...||11 tons in 14 months|
|24||Keighley||...||...||July, 1900 to April, 1902||91||Varies|