Stormwater Facts

Did you know ...
In the City of Manassas:
  • There are 5,320 storm drains that connect to 22 stormwater ponds in the city.
  • The two largest ponds are at the interchange of Godwin Drive, Nokesville Road, and the 234 By-pass. A third large pond is at Winter's Branch, which flows between Wellington Road and Hastings Drive near Jennie Dean School.
  • The Sumner Lake subdivision pond and the twin ponds at Owen's Brook subdivision complete the five largest in the city. All empty into other tributaries such as Broad Run, which empties into the Occoquan River, which eventually leads to the Chesapeake Bay.
  • The city has two watersheds: Broad Run and Bull Run which drain to the Occoquan River.
More things to consider:
  • 80 percent of the Earth’s surface is covered by water.
  • Only 3 percent of the Earth’s water is fresh water.
  • Only 1 percent of the Earth’s water is suitable for drinking.
  • Each year 1.2 trillion gallons of untreated sewage, stormwater and industrial waste are dumped into U.S. waterways.
  • Stormwater feeds into our watershed and our supply of drinking water.
  • EVERYONE lives in a watershed.
  • Stormwater runoff is the nation's number one source of water pollution.
  • According to the American Petroleum Institute, an average of more than 239 million gallons of motor oil is used by car owners who change their own oil. An average of only 53 million gallons is recycled.
  • Decaying leaves and organic materials in the storm drain increase bacteria and mosquito production and decrease oxygen essential for fish life.
  • One gallon of oil in the storm drain can pollute up to one million gallons of stormwater.
  • The three largest sources of storm water pollution are: herbicides and pesticides from agriculture, urban runoff, and sediment from construction sites.
  • When lawn fertilizer enters the stormdrain, it can cause excessive algae growth and oxygen depletion.
  • The behavior of individuals contributes MORE to water pollution than business, industry and large public enterprise.
  • A typical city block generates more than 5 times more runoff than a wooded area of the same size.
  • It is estimated that 4 billion tons of sediment is eroded annually from construction sites into U.S. waterways.
  • The Mississippi River carries an estimated 1.5 million metric tons of nitrogen pollution into the Gulf of Mexico each year, creating a “dead zone” in the Gulf each summer about the size of New Jersey.
  • Approximately 40 percent of the lakes in America are too polluted for fishing, aquatic life, or swimming