The storm water drainage system is a network of drains, pipes and ponds designed to channel storm water directly to our rivers. Everything residents wash down the storm drains ends up in our rivers.
It is an offence to allow any prohibited material into the Storm Drainage System. Examples of prohibited materials include: soil, waste, animal waste, fecal matter, cooking oils, greases, gasoline, motor oil, transmission fluids, solvents, paint, cement, sawdust, yard waste, pesticides, biomedical waste, hazardous waste, soaps, odorous materials, detergents and water from hot tubs.
Vehicles must be washed at a car wash and not on a road, an alley or a driveway.
Drain hot tubs and swimming pools directly into the wastewater drain located in the basement of your residence. This ensures that pool/hot tub water does not enter the storm sewer system. Further information can be found in theWastewater Bylaw 14M2012.
Directing storm drainage
Downspouts and eaves troughs must not terminate within 2 metres of a surface drainage facility (unless located in a side yard) or a street, which includes alleys and lanes. Further information regarding directing of downspouts can be found in the Community Standards Bylaw 5M2004.
Surface drainage facilities
It is a requirement to keep surface drainage facilities on private property (known as "Overland Drainage Right-of-Way" (ODRW) including swales and catch basins/drains) clear of any soil, silt, yard waste or any other matter that may obstruct, restrict or prevent the flow of water.
Buildings or structures cannot be constructed or placed on or over the surface drainage facility. If a fence must be built over the facility, there must be at least 6 inches (15 cm) of clearance between the facility and the bottom of the fence.
Use of storm drainage
The use of any storm drainage for activities such as construction or irrigation purposes is prohibited without the written consent of the Director of Resources.
Fines for violations of these regulations range between $75 and $3,000 for the first offence.
TheDrainage Bylaw 37M2005 works in conjunction with theLot Grading Bylaw and Community Standards Bylaw to ensure appropriate water use and drainage in and around your property.
Learn more about the Drainage Bylaw’s regulations, including water drainage frequently asked questions. You can also find more details about what the bylaw means to homeowners or what the bylaw means to businesses and industry.
Lot Grading Bylaw
Learn more about the Lot Grading Bylaw’s regulations, including frequently asked questions about water drainage. You can also find a detailed chart, including information on grade slip and minimum grades on our Lot Grading Tolerance Guidelines page.
Original copies of these bylaws are available at the City Clerk's office. More information can be found in the following:
For other water-related bylaw information visit Bylaws Related to Water.
Filing a complaint
How to file a complaint and what happens to it
If you know of a bylaw infraction and would like to report it to Animal & Bylaw Services, please call 311 (from within Calgary) or 403-268-CITY (2489) (from outside Calgary).
Search Our Bylaws
To find out more information about Calgary’s other bylaws you can search bylaws by topic.