Environmental Monitoring & Protection

The City of Toronto's Environmental Monitoring & Protection (EM&P) Unit is responsible for Sewers Bylaw and Water Supply Bylaw compliance and enforcement. EM&P ensures that industrial, commercial and institutional (ICI) facilities comply with these bylaws through monitoring, sampling, testing and inspecting and educate ICIs and residents on these bylaws. Enforcement and compliance of these bylaws are required to:

  • protect sewer infrastructure from obstruction and deterioration due to harmful discharges,
  • protect wastewater treatment plant operations,
  • protect the aquatic environment,
  • ensure the health and safety of City staff and the public,
  • meet legislative and regulatory requirements, and
  • control biosolids quality.

The Sewers and Water Supply Bylaw Compliance and Enforcement Annual Report contains details on the many compliance and enforcement tools used by EM&P.

Environmental Monitoring & Protection

Sewers Bylaw

Learn more about Toronto's Sewers Bylaw, designed to limit the amount of toxins that enter our sanitary and storm sewers.

Water Supply Bylaw

Enacted in 2008, the City of Toronto's Water Supply Bylaw provides consistent policies and procedures related to water connection, billing and service. 

Industrial Waste Control

A subgroup of Environmental Monitoring & Protection, Industrial Waste Control monitors organizations in Toronto to ensure their operations adhere to the City's Sewers Bylaw.

Pollution Prevention (P2) Program

Certain industrial, commercial and institutional facilities must complete a Pollution Prevention (P2) Plan, which identifies ways to avoid, reduce or eliminate the creation of certain pollutants at the source.

Outfall Monitoring Program

Inspection and sampling of every storm sewer outfall discharging into Lake Ontario and Toronto's watercourses.

Fat, Oil and Grease (FOG)

Grease from cooking, preparing and manufacturing food can cause blockages in the sewer system leading to sewage backup into basements and businesses and potentially releasing grease to the natural environment – learn helpful preventative tips and about the Food Service Establishment Environmental Code of Practice.

Swimming Pools, Hot Tubs and Spas

Learn the proper way to dispose of water from residential pools, hot tubs or spas and commercial pools to help protect water quality.

Washing Wisely Outdoors

When washing anything outdoors, we all need to be aware of how our storm sewer system works and how it is directly connected to our local waterways and the Lake.

Backflow Prevention Program

The City of Toronto's Backflow Prevention Program works to ensure compliance with the Water Supply Bylaw and the protection of the drinking water supply.

Public Consultation EM&P

Bylaws require amendments to include constantly emerging information, technologies and current activities.