ECCC calculates the AQHI hourly from PM2.5 alone during wildfire smoke events, because smoke raises fine particle levels quickly.

What Affects Air Pollution in Airdrie?

Wildfire smoke is the biggest driver of Airdrie air pollution today. Winter weather and emissions from a growing city of 92,544 people (2025, per the Government of Alberta Regional Dashboard) also play a part.

•      Wildfire smoke. On 16 May 2023, Airdrie's AQHI reached 10+ as smoke from northern and central Alberta wildfires moved south, DiscoverAirdrie reported. Filterbuy's Airdrie wildfire and smoke map tracks smoke, and Alberta wildfire status lists active fires.

•      Winter temperature swings. Mandeep Dhaliwal, Air Quality Program Manager at CRAZ, told DiscoverAirdrie that sharp swings from very cold to warm can trap pollution near ground level, an effect known as a temperature inversion.

•      Traffic and combustion. Nitrogen dioxide comes mainly from vehicles and fuel burning, so readings can rise near busy corridors such as Highway 2.

ECCC issues a Special Air Quality Statement at AQHI 7–10 and an Air Quality Advisory when the AQHI stays above 10 for three or more hours during smoke, per ECCC's 2024 alert announcement.

How Often Is Airdrie's Air Quality Bad? Our 12-Month Analysis

Filterbuy Canada analyzed 8,304 hourly AQHI readings from the Airdrie station, via Alberta's open AQHI data service, for 21 October 2025 to 18 October 2026. Airdrie's air was low risk 94.5% of the time.

•      Low (1–3): 7,846 hours (94.5%)

•      Moderate (4–6): 407 hours (4.9%)

•      High (7–10): 36 hours (0.4%)

•      Very high (10+): 15 hours (0.2%)

1.    Smoke season drives bad hours. May to September held 78% of moderate-or-worse hours; October to April stayed low risk 98% of the time.

2.    Every high or very high hour fell between 28 May and 2 August 2026.

3.    One event dominated. All 15 very high hours came on 23–24 July 2026, peaking at AQHI 15, as smoke from British Columbia and Washington State wildfires reached the region, CP24 reported.

4.    It lasted overnight. Every reported hour from 1 p.m. on 23 July to 3 p.m. on 24 July was high or very high.

Our take: prepare before late May, and during smoke events check the map at night and early morning, not just midday. Figures are preliminary; the station reported in about 95% of hours.

Is the Air Quality Bad in Airdrie Today? A Quick Check

To know whether the air quality is bad in Airdrie today, follow the same order of sources we used to research this page.

1.    Read the current Airdrie reading on the live map above.

2.    Match it to the AQHI risk table (7 or higher is high risk).

3.    Open the ECCC Airdrie AQHI forecast or the Alberta AQHI map to see whether conditions will improve or worsen.

4.    Check the same ECCC page for active alerts, and view real-time station data on the CRAZ Airdrie station page.

Supporting Statistics

1.    15,300 premature deaths a year. Health Canada links these deaths to air pollution above natural levels. About 1,400 are in Alberta. The estimate covers the three AQHI pollutants. Source: Health Canada, Health Impacts of Air Pollution in Canada, 2021 Report.

2.    About 90% of time indoors. Source: Environment and Climate Change Canada, Indoor Air Quality.

3.    17.2 million hectares burned in 2023. That set a national wildfire record. It is over six times the 10-year average. Source: Canadian Interagency Forest Fire Centre (CIFFC), 2023 Canada Report.

How Can Airdrie Homes Keep Indoor Air Cleaner?

MERV 13 is the furnace filter rating to use during wildfire smoke. Health Canada's guidance for cleaner air spaces during wildfire smoke events recommends HVAC filters rated MERV 13 or more to remove fine particulate matter. Put ECCC alerts and Health Canada's wildfire smoke advice first during any smoke event.

Filterbuy's Smoke Action Plan for Airdrie Homes

Filterbuy's action line is an AQHI of 7 or higher. At that point, we recommend four steps:

1.    MERV 13 in the furnace. It filters the whole home, since the central system moves far more air than a portable unit.

2.    Thermostat fan set to On. Auto filters only while the system heats or cools; On filters continuously. The U.S. EPA recommends the same setting during smoke.

3.    A portable HEPA air cleaner in each occupied room, bedrooms first. Health Canada's portable air cleaner guidance advises a smoke CADR of at least two-thirds of the room's area (a 300 sq ft bedroom needs about 200) and avoiding devices that produce ozone.

4.    Close the house up. Keep windows and doors shut and set ventilation to recirculate. Skip candles and frying while smoke is in.

No central furnace? In apartments and homes without ductwork, portable HEPA air cleaners are the main layer of filtration, not a backup.

Choosing a Furnace Filter for Airdrie's Seasons

Filterbuy's recommendation for Airdrie homes: install a fresh MERV 13 filter before smoke season starts in late May. Confirm the fit like a size, using your furnace manual or an HVAC technician; Filterbuy's guide to upgrading your HVAC system with a MERV 13 filter walks through it. Check the filter often during smoke and replace it when it looks dirty, which can be well before the usual interval; the EPA also advises keeping spares on hand. The wildfire smoke recovery checklist covers clean-up afterward.

•      MERV 13 Optimal filters capture fine particles and are the tier we recommend for smoke. Filterbuy Canada carries MERV 13 air filters in 600+ sizes plus custom air filter sizes; find your filter size first.

•      MERV 11 Superior filters suit homes with pets or spring allergies; see MERV 11 air filters.

•      Smoke odour is a gas, which pleated filters don't capture; for odours, see carbon Odour Eliminator filters.

Filterbuy's air filter subscription delivers replacements every 30, 60, or 90 days with free shipping to Canada, so spares arrive before smoke season. Edit, skip, or cancel anytime.