Tsawwassen vs Yellowknife AQI Comparison

Side-by-side OpenAQ-derived air quality comparison for Tsawwassen and Yellowknife. Values use mapped daily PM2.5 and PM10 observations normalized to US EPA AQI.

Lower average AQI: Tsawwassen (29-pt gap)PM2.5: Tsawwassen 3.5 ug/m3 · Yellowknife 13.2 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-01-01–2025-01-01 and 2024-06-04–2025-01-01.

Compare two cities

City A

City B

Tsawwassen vs Yellowknife

Tsawwassen

British Columbia, Canada

PM2.5: 3.5 ug/m3
PM10: n/a ug/m3
Worst month: July
Trend: n/a

EPA category: Good

Yellowknife

Northwest Territories, Canada

PM2.5: 13.2 ug/m3
PM10: 14.4 ug/m3
Worst month: July
Trend: n/a

EPA category: Good

Lower average AQI in this selected period: Tsawwassen. Values are historical OpenAQ-derived city summaries, not live readings.

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Tsawwassen

Yellowknife

What this comparison measures

Average EPA AQI — city-level daily AQI values averaged across the OpenAQ coverage window.
PM2.5 and PM10 — mapped monitor concentrations aggregated to daily city averages.
Seasonality — worst and cleanest months from the monthly city rollups.
Trend — difference between the earliest and latest yearly AQI average in this build.