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Defend Your Drains from Fats, Oils, and Grease!


Improper disposal of fats, oils, and grease can lead to buildup and blockages.

Left photo: Bacon cooking in its grease, which will solidify when it cools. Photo credit: Brian Geck.

Right photo: Grease buildup discovered during home kitchen remodel. Photo credit: Jessica Hoffman.


The Effects of Improper FOG Disposal: 7 Facts

Fact 1: Fats, oils, and grease (FOG) are often disposed of improperly. FOG comes from meats, butter, lard, food scraps, sauces, dressings, dairy products, and cooking oil. Some methods of improper disposal may be obvious bad choices, such as dumping used cooking oil down the storm drain, but even washing greasy residues down the kitchen drain can create problems.

Fact 2: Improper disposal of FOG can lead to property damage, health hazards, and environmental problems. Pipes may be blocked by FOG poured or washed down the drain, even if diluted with hot, soapy water. (Although in a liquid state when hot, grease transforms back to a solid as it cools.) FOG builds up in the wastewater system, catching on items such as wipes, leading to "fatbergs" that create blockages. One famous example is the 15-ton London fatberg, which damaged the sewer and took 6 weeks to repair.


Fact 3: As sewer pipes back up, sewage and food particles that accumulate can attract insects and other vermin. It may even create a potential health hazard by exposing people to raw sewage.


Fact 4: Property damage can result from sewage backups, resulting in expensive cleanup and plumbing repairs. Clogged sewers can also lead to overflows, which can run into the street and down the storm drain system, eventually polluting our creeks, rivers, and lakes -- the source of our drinking water.


Fact 5: Oils pollute streams and creeks by forming a film on the water surface, which prevents oxygenation for aquatic life. Polluted stormwater runoff can lead to excessive and costly maintenance and cleanup. It can also result in severe fines from state and federal regulatory agencies. A firm in Tacoma, Washington, was fined $49,000 by authorities for dumping 4,000 gallons of kitchen grease and wastewater down a storm drain.


Fact 6: Disposing of restaurant grease into storm drains or down manhole covers is illegal under the Texas Litter Abatement Act. (Our storm drains lead directly to waterways, not a wastewater treatment plant.) Commercial food preparation establishments and residents should never dispose of grease and cooking oil by dumping it into the storm drain system. For more information on the proper disposal of restaurant grease, visit


Fact 7: When people wash FOG down the drain, they're washing away a valuable commodity. Used vegetable oil can be recycled into a non-toxic, renewable, biodegradable fuel called biodiesel. Used fats and oils can also be recycled into animal feed and other products. Check with your city to see if and how FOG is recycled in your community.


What You Can Do



The Stormwater Public Education Task Force for North Central Texas

TCEQ: Reducing Fats, Oils, and Grease in Your Home or Apartment

WATER: Cease the Grease website

WATER: Defend Your Drains North Texas website

 North Central Texas Council of Governments | 616 Six Flags Drive P.O. Box 5888 Arlington, TX 76005-5888
 Main Operator: (817) 640-3300 | Fax: (817) 640-7806