How can municipalities start tackling wastewater emissions? We partnered with GHD to develop a new case study that explores how Canadian municipalities can build their first wastewater greenhouse gas (GHG) inventory — a critical step toward climate mitigation.

Key takeaways:

• Municipalities typically choose between using an existing tool or developing a custom calculator. Publicly available tools, such as the Ontario Water Works Association and Water Environment Association of Ontario’s inventory tool, offer a practical and efficient option.
• Once the inventory is complete, one result typically stands out: nitrous oxide likely dominates the GHG inventory. Nitrous oxide is a potent greenhouse gas.
• Make the inventory repeatable. Establish a consistent annual inventory process. Repeating the exercise year over year strengthens decision making and prevents one unusual year from driving long term conclusions.

Read the full case study