Hamilton’s deputy medical officer of health is clarifying the recent findings by the public health department regarding the grime that coated city neighborhoods in July. Dr. Bart Harvey emphasized that the department did not claim the emissions had no impact on long-term health. Instead, they highlighted that ongoing pollutants are present in Hamilton’s air regularly and everyone is exposed to them.
Residents in Hamilton reported discovering a black soot-like substance on their properties, pets, and family members in early July. The issue of black fallout is not new in the city, especially near industrial areas, where complaints have been made for years. However, the soot observed in July was more widespread and pronounced than usual.
In August, Ontario’s Ministry of the Environment, Conservation and Parks identified emissions from Birla Carbon as a key source of the recent grime. Despite this, public health investigations, including analyzing air monitor data and emergency room visits, did not show any immediate health effects that required urgent medical attention related to the soot.
Although people may have experienced minor symptoms like itchy eyes or sore throats due to the soot, it was unlikely to prompt a visit to the doctor, according to Dr. Harvey. The samples of soot mainly contained carbon and other pollutants commonly found in Hamilton’s air on a regular basis.
While air quality in the city has been improving, pollutants such as benzo(a)pyrene and polycyclic aromatic hydrocarbons (PAHs) persist, posing health risks and negative outcomes. A 2024 public health report highlighted the association of air pollutants with various health effects, including heart disease, COPD, and lung cancer.
Researcher Matthew Adams previously conducted a study showing that breathing Hamilton’s air is akin to smoking part of a cigarette daily due to the presence of harmful PAHs. Adams noted the prevalence of these compounds in the city’s air, particularly near industrial zones.
Adams emphasized the importance of considering the cumulative impact of various sources of air pollution on individuals, especially children, who are more vulnerable due to their higher breathing rates and developing bodies. He advocated for implementing technologies to reduce emissions from industrial sources to improve air quality.
Public health recommends cleaning the grime with soap and water or mild detergent and avoiding actions that could stir up particles during cleaning. Additionally, they advise washing produce covered in grime before consumption and taking precautions with root vegetables and leafy plants to minimize exposure.
Overall, public health emphasizes the need for reducing emissions to address air quality issues in Hamilton and mitigate the health risks associated with pollutants present in the city’s air.