| #Q001 | prohibition | operational | mandatory | Prohibition of Discharge into Catch Basins | wastewater | No substances other than rain and melted snow can be poured or allowed to flow into an outdoor catch basin (square grates on the street). | This includes: oils, grease, antifreeze and other automotive fluids; soaps and other cleaning products; water leaking from a waste/oil bin; any water used for cleaning; solid materials. | high |
| #Q002 | treatment | treatment | mandatory | Commercial Car Wash Facility Practices | wastewater | These facilities are required to follow a set of practices determined by the City, including treating wastewater and discharging it into the sanitary sewer system where it will receive further treatment. | Applies to commercial car wash facilities (automatic or coin). | high |
| #Q003 | prohibition | operational | recommended | Prohibition of Discharges to Sewers | wastewater | never pour anything down manholes or catch basins | | high |
| #Q004 | corrective_action | operational | recommended | Vehicle Spill Cleanup | wastewater | clean up vehicle spills or leaks to prevent toxins from entering the sewer | | high |
| #Q005 | prohibition | operational | mandatory | Outdoor Washing Wastewater Prohibition | wastewater | Wastewater from outdoor washing must not reach any catch basins as soaps, cleaning products and contaminants dislodged or dissolved from the surface being washed will violate storm sewer By-law limits. | This includes water used for graffiti removal, building restoration, as well as vehicle, sidewalk, alley or other outdoor washing. | high |
| #Q006 | administrative | operational | mandatory | Off-site Wastewater Hauling Requirement | wastewater | Hauling off-site must be performed by a Ministry of the Environment, Conservation and Parks approved hauler. | Applies when disposing of wastewater by hauling it off-site instead of letting it evaporate, re-routing it away from a catch basin, or disposing of it in an indoor drain. | high |
| #Q007 | prohibition | operational | recommended | Outdoor Garbage Area Cleaning Prohibition | wastewater | Outside garbage areas should not be cleaned using running water. | | high |
| #Q008 | administrative | operational | mandatory | Mobile Wash Business Operations Responsibility | wastewater | Make sure to hire a company that follows the Sewers By-law as both the person hiring and the mobile wash business operation/company are responsible for wastewater discharging from the property. | Applies when hiring mobile wash businesses including companies that wash cars and buildings, landscapers washing windows, duct cleaning companies washing roof exhausts. | high |
| #Q009 | reporting | reporting | mandatory | Bypass Initiation Notification | wastewater | The City notifies the MECP’s Spills Action Centre when a bypass starts and ends using the MECP’s Bypass & Overflow Reporting portal or by telephone. | Applies upon the start and end of a wastewater treatment plant bypass event. | high |
| #Q010 | reporting | reporting | mandatory | Detailed Bypass Data Entry | wastewater | Within 10 business days, the City adds more detailed information to the portal such as duration and volume. | Following a bypass event reported to the MECP portal. | high |
| #Q011 | reporting | reporting | mandatory | Periodic Bypass Summary Reports | wastewater | The City also submits a monthly (Humber) or quarterly (Ashbridges Bay) summary of bypass events to the MECP, and posts these bypass events monthly on the City’s website. | Frequency varies by plant (monthly for Humber, quarterly for Ashbridges Bay). | high |
| #Q012 | reporting | reporting | mandatory | Annual Bypass Reporting Submission | wastewater | Bypass information is included in the plant’s annual report, submitted to the MECP and posted online by March 31 of the following year. | | high |
| #Q013 | treatment | treatment | mandatory | Bypass Wastewater Disinfection | wastewater | all wastewater is disinfected even during a bypass. | Applies during bypass events to ensure treated water meets federal and provincial regulations. | high |
| #Q014 | administrative | health | guidance | Post-Rainfall Water Contact Advisory | recreational water | The City of Toronto advises people to stay out of the water during and for 48 hours after rainfall. | Triggered by rainfall events due to potential high levels of pollutants. | high |
| #Q015 | treatment | treatment | mandatory | Comprehensive Bypass Treatment Requirements | wastewater | The bypassed wastewater still goes through screening, grit removal, primary treatment, phosphorous removal and full disinfection to ensure the treated water always meets strict federal and provincial regulations. | Applies during bypass events where wastewater is diverted around the secondary treatment process. | high |
| #Q016 | reporting | reporting | mandatory | Federal Testing and Reporting Compliance | wastewater | The federal government also has testing and reporting requirements. | | high |