Calgary air quality on Friday among the worst cities on earth
A thick blanket of wildfire smoke that hung over the City of Calgary Friday sent the city’s air quality index soaring — and compared to the air quality in other major cities around the world, it was among the worst on the planet, according to measurements by Switzerland-based air quality technology company IQAir. Get weekly health news Receive the latest medical news and health information delivered to you every Sunday. Airdrie, Alta., had the third-worst air quality, followed closely by Calgary with the fourth-worst air quality.
- ▪A thick blanket of wildfire smoke that hung over the City of Calgary Friday sent the city’s air quality index soaring — and compared to the air quality in other major cities around the world, it was among the worst on the planet, according
- ▪Get weekly health news Receive the latest medical news and health information delivered to you every Sunday.
- ▪Airdrie, Alta., had the third-worst air quality, followed closely by Calgary with the fourth-worst air quality.
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| Original publisher | Global News |
| Canonical URL | https://globalnews.ca/news/11987997/calgary-air-quality-among-worst-on-earth/ |
| Publication time | Fri, 24 Jul 2026 20:40:03 +0000 |
| Retrieval time | 2026-07-24T20:46:34.476Z |
| Last seen | 2026-07-24T20:46:34.476Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | DVl5sDqENmjl |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
A thick blanket of wildfire smoke that hung over the City of Calgary Friday sent the city’s air quality index soaring — and compared to the air quality in other major cities around the world, it was among the worst on the planet, according to measurements by Switzerland-based air quality technology company IQAir. Environment Canada’s Air Quality Health Index (AQHI), which measures a combination of common air pollutants that are harmful to human health, including ground-level ozone, nitrogen dioxide and particulate matter, put Calgary’s air quality at 10+, which is defined as “very high risk.”The AQHI measures air quality on a scale of one to 10, with one being the best air quality and 10 being the worst.In Edmonton, where the air quality index was in the very high risk range earlier in…
Excerpt limited to ~120 words for fair-use compliance. The full article is at Global News.
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