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.||Rate of flow of sewage through the tank.||Quantity of sewage passed into the tank.||Quantity of sludge left in the tank.||Percentage of moisture in the sludge left in the tank.||Percentage reduction in the amount of sludge effected by septic action.|
|Weeks.||Gallons per day.||Gallons.||Tons.|
|47||York||Closed||21 April, 1889 to 81 Aug., 1901||123||From 13,000 to 40,000||14,500,000|
|Open||26 June, 1900, to 12 Mar., 1901||89||182,000 to 318,000||106,000,000||390 cubic yards.||89.3|