Air quality in Kingston, Ont. at worst end of health index scale

Kingston, Ont. at 11:30 a.m. Thursday, July 16, 2026. The city is under an orage warning for air quality due to wildfire smoke from northwestern Ontario. (City of Kingston/webcam)

The air quality in Kingston, Ont. is at the worst end of the scale Thursday, as smoke from wildfires in northwestern Ontario blankets parts of the province.

Environment Canada has issued an orange warning for air quality in the Limestone City, with the air quality health index (AQHI) at 10+, or “very high risk.”

“During heavy smoke conditions, everyone’s health is at risk regardless of their age or health status,” Environment Canada says. “Limit time outdoors. Reschedule or cancel outdoor sports, activities and events.”

The poor air quality could result in symptoms such as eye, nose and throat irritation, headaches or a mild cough and, in severe cases, wheezing and chest pain.

The City of Kingston says if anyone is experiencing symptoms such as increased coughing, throat irritation, headaches or shortness of breath, the Southeast Public Health (SEPH) recommends reducing or rescheduling strenuous outdoor activity until the air quality improves.

Seek medical attention if you develop severe symptoms, including shortness of breath, dizziness, chest pains, heart palpitations, wheezing or severe cough.

Environment Canada says air quality could improve Thursday afternoon or evening but may deteriorate again by the weekend.

According to the AQHI forecast, Kingston could go from a 10+ level to a 7 later Thursday, which is still considered high risk, and to a 5, or moderate risk, by Thursday night.

The City of Kingston says everyone is at risk for health impacts related to poor air quality; however, health risks are greatest for infants and children, older adults, those living in high air pollution areas, people living with chronic illnesses (such as asthma, diabetes, heart or lung diseases), people who are pregnant, people who are underhoused or experiencing homelessness, people who work outdoors, or people participating in strenuous sports and outdoor activities.

• Sign up now for daily CTV News Ottawa newsletters
• The information you need to know, sent directly to you: Download the CTV News App