Report Suspected Polluting
Call 215-887-6200, ext. 330, weekdays between 7:30AM  and 4PM or call 9-1-1 on weekends, nights and holidays.
Kid's Corner
Rainfall Off Your Roof

Fact: 1" of rainfall on a 1000 sq. ft. roof will produce 600 gallons of rainwater.


To calculate the square footage of your house, you can measure the outside area of the exterior walls. To find area, multiply Length times Width. Using an example of a house that is 50' in length by 35' in width, we would multiply 50' x 35' to equal 1750 sq. ft. Move the decimal point over 3 places to the left to continue the equation.


Since 1" of rain yields 600 gallons on a 1000 sq. ft. roof, we will multiply 600 x 1.75 to determine the quantity of run-off from our example roof. 600 x 1.75 = 1050 gallons.


How much rainwater can be collected from your roof?