Cambridge vs Williams Lake AQI Comparison

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

Lower average AQI: Williams Lake (34-pt gap)PM2.5: Cambridge 12.2 ug/m3 · Williams Lake 2.9 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-04-28–2025-01-01 and 2024-01-01–2025-01-01.

Compare two cities

City A

City B

Cambridge vs Williams Lake

Cambridge

Ontario, Canada

PM2.5: 12.2 ug/m3
PM10: 12.9 ug/m3
Worst month: April
Trend: n/a

EPA category: Good

Williams Lake

British Columbia, Canada

PM2.5: 2.9 ug/m3
PM10: 12.4 ug/m3
Worst month: August
Trend: n/a

EPA category: Good

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

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Cambridge

Williams Lake

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.