Currently, the Federal and BC Provincial governments do not have ambient air quality objectives or standards for lead. However, it is reasonable to rely on standards from other jurisdictions when this is the case and the US EPA has a standard of 0.15 micrograms per cubic metre lead in total suspended particulate matter as a 3-month average. Pb in air levels measured at Butler Park and Birchbank met the US EPA standard of 0.15 ug/m3 on a 3-month average throughout 2020.
There is no known safe level of lead exposure. The Trail Area Health & Environment Committee (THEC) has a goal of continuous reduction of lead in the community and the partners focus on efforts to achieve this.