Canadian AQHI air-quality episode intelligence (daily)

Name: Canadian AQHI air-quality episode intelligence (daily)
Creator: Canadian AQHI Air-Quality Episode Intelligence
License: https://eccc-msc.github.io/open-data/licence/readme_en/
Keywords: air-quality, canada, daily, rankings, signals, environment

Commercial use OKFreshLicense: LicenseRef-ECCC-Data-Services-End-use-2.1.1

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The full snapshot isn't published yet — check back after the next refresh.Download sample CSV Download sample JSONSample rows only (up to 20) — not the complete dataset.

Air Quality Health Index (AQHI, 1-10+ scale) episode intelligence for every Canadian monitoring station, as a station x date panel from ECCC's keyless MSC GeoMet OGC API. Observed episodes cover the last two complete UTC days; forecast episodes come from the latest published forecast. Each row is one (station, date): max/mean AQHI, time of the daily max, hours with AQHI >= 4 and >= 7, the official ECCC band of the max and an e0/e1/e2/e3 episode tier, a documented 0-100 episode_score (0.45 peak severity + 0.30 moderate+ persistence + 0.25 high+ persistence) ranked as episode_rank within (kind, date) with a top-10 dirtiest flag. Amendment observations replace originals (never double-counted); station-days below the 18-observation / 12-forecast coverage gates are dropped, never interpolated. Units: AQHI index points; hours; UTC datetimes. Caveats: AQHI is a health-risk communication index, not a raw pollutant concentration; forecasts are model output superseded by the next publication; same-day re-ingests can legitimately differ when the realtime feed drifts. ECCC Data Services End-use Licence v2.1.1 — commercial_use = yes, attribution required. Primary key: (as_of, kind, date, location_id). Cadence: daily.

Source: Canadian AQHI Air-Quality Episode Intelligence
Rows: 276
Columns: 24
Source cadence: Daily
Last refreshed: Sep 26, 2026
Theme: environment

Column	Type	Description
as_of	string	Reference day: the last complete UTC day (YYYY-MM-DD). Fixed per run so identical input produces an identical content hash. (unit: date)
kind	string	Episode source: 'observed' (ECCC AQHI observations) or 'forecast' (latest published AQHI forecast). (unit: category)
date	string	The day the episode row covers (UTC; forecast dates run into the forecast window). (unit: date)
location_id	string	ECCC AQHI station code (e.g. DAFQX). (unit: id)
station_name_en	string	Station name in English.
station_name_fr	string	Station name in French.
region_en	string	ECCC administrative zone in English (Atlantic, Quebec, Ontario, Prairies, Pacific).
lat	float	Station latitude (WGS84). (unit: degrees)
lon	float	Station longitude (WGS84). (unit: degrees)
country_code	string	ISO alpha-3 country code; constant 'CAN' — every ECCC AQHI station is in Canada.
n_records	integer	Raw AQHI records behind the row (>= 18 for observed, >= 12 for forecast station-days). (unit: count)
aqhi_max	float	Maximum AQHI value in the station-day (AQHI scale 1-10+; observed values may be fractional). (unit: AQHI index points)
aqhi_max_time_utc	string	UTC datetime of the daily AQHI maximum (earliest when tied). (unit: datetime)
aqhi_mean	float	Mean AQHI across the station-day's records. (unit: AQHI index points)
hours_ge4	integer	Records with AQHI >= 4 (moderate or worse) — a persistence measure of the episode. (unit: hours)
hours_ge7	integer	Records with AQHI >= 7 (high or worse) — a persistence measure of severe episodes. (unit: hours)
max_aqhi_band	string	Official ECCC AQHI band of aqhi_max: low (<4), moderate (4-6), high (7-10), very_high (>10). (unit: category)
episode_tier	string	Episode tier from the max band: e0 clean (low), e1 moderate, e2 high, e3 very high. (unit: category)
episode_score	float	Documented 0-100 episode score: 100 * (0.45 * clip((aqhi_max - 1) / 9, 0, 1) + 0.30 * clip(hours_ge4 / 12, 0, 1) + 0.25 * clip(hours_ge7 / 6, 0, 1)) — absolute across days and snapshots. (unit: score)
episode_rank	integer	Episode rank within (kind, date) (1 = worst; ties broken by hours_ge4 desc, aqhi_max desc, location_id asc). (unit: rank)
is_top10	boolean	True for the 10 worst episodes per (kind, date) — the 'dirtiest leaderboard'.
publication_datetime	string	Forecast publication datetime (UTC); the panel keeps only the latest publication. Null for observed rows. (unit: datetime)
source_url	string	The exact GeoMet OGC API items URL queried for this run (per kind). (unit: URL)
row_hash	string	SHA-256 (16 hex chars) over the row's content fields; identical input yields an identical hash. (unit: hash)

First 10 sample rows — a preview, not the complete dataset.

as_of	kind	date	location_id	station_name_en	station_name_fr	region_en	lat	lon	country_code	n_records	aqhi_max	aqhi_max_time_utc	aqhi_mean	max_aqhi_band	episode_tier	episode_score	episode_rank	is_top10	publication_datetime	source_url	row_hash
2026-09-25	forecast	2026-09-26	JCVCC	Eastern Fraser Valley	Bas-Fraser - est	Pacific and Yukon	49.175	-121.942	CAN	22	2	2026-09-26T21:00:00Z	1.273	low	e0	5	1	true	2026-09-26T13:00:00Z	https://api.weather.gc.ca/collections/aqhi-forecasts-realtime/items?f=json&limit=10000&datetime=2026-09-24T19%3A01%3A49Z%2F2026-09-26T19%3A01%3A49Z	403f7379bbe1cd1c
2026-09-25	forecast	2026-09-26	KAHFT	Whitehorse	Whitehorse	Pacific and Yukon	60.696	-135.081	CAN	22	2	2026-09-26T22:00:00Z	1.182	low	e0	5	2	true	2026-09-26T13:00:00Z	https://api.weather.gc.ca/collections/aqhi-forecasts-realtime/items?f=json&limit=10000&datetime=2026-09-24T19%3A01%3A49Z%2F2026-09-26T19%3A01%3A49Z	d2a63eddbaaff795
2026-09-25	forecast	2026-09-26	JCVCJ	Squamish	Squamish	Pacific and Yukon	49.75	-123.133	CAN	22	1	2026-09-26T13:00:00Z	1	low	e0	0	3	true	2026-09-26T13:00:00Z	https://api.weather.gc.ca/collections/aqhi-forecasts-realtime/items?f=json&limit=10000&datetime=2026-09-24T19%3A01%3A49Z%2F2026-09-26T19%3A01%3A49Z	3efffc69b880d33e
2026-09-25	forecast	2026-09-27	JABNO	Central Fraser Valley	Bas-Fraser - centre	Pacific and Yukon	49.058	-122.25	CAN	24	2	2026-09-27T00:00:00Z	1.25	low	e0	5	1	true	2026-09-26T13:00:00Z	https://api.weather.gc.ca/collections/aqhi-forecasts-realtime/items?f=json&limit=10000&datetime=2026-09-24T19%3A01%3A49Z%2F2026-09-26T19%3A01%3A49Z	0a1344550ab10361
2026-09-25	forecast	2026-09-27	JAFNW	Kamloops	Kamloops	Pacific and Yukon	50.673	-120.327	CAN	24	2	2026-09-27T00:00:00Z	1.333	low	e0	5	2	true	2026-09-26T13:00:00Z	https://api.weather.gc.ca/collections/aqhi-forecasts-realtime/items?f=json&limit=10000&datetime=2026-09-24T19%3A01%3A49Z%2F2026-09-26T19%3A01%3A49Z	5ddcf77c9786d436
2026-09-25	forecast	2026-09-27	JAFUV	Central Okanagan	Okanagan - centre	Pacific and Yukon	49.883	-119.483	CAN	24	2	2026-09-27T00:00:00Z	1.208	low	e0	5	3	true	2026-09-26T13:00:00Z	https://api.weather.gc.ca/collections/aqhi-forecasts-realtime/items?f=json&limit=10000&datetime=2026-09-24T19%3A01%3A49Z%2F2026-09-26T19%3A01%3A49Z	99c0492baee89c02
2026-09-25	forecast	2026-09-27	JAGPB	Fort St. John	Fort St. John	Pacific and Yukon	56.253	-120.847	CAN	24	2	2026-09-27T00:00:00Z	1.833	low	e0	5	4	true	2026-09-26T13:00:00Z	https://api.weather.gc.ca/collections/aqhi-forecasts-realtime/items?f=json&limit=10000&datetime=2026-09-24T19%3A01%3A49Z%2F2026-09-26T19%3A01%3A49Z	9ae9776819ad8506
2026-09-25	forecast	2026-09-27	JAHJY	Comox Valley	Vallée de Comox	Pacific and Yukon	49.683	-124.983	CAN	24	2	2026-09-27T00:00:00Z	1.167	low	e0	5	5	true	2026-09-26T13:00:00Z	https://api.weather.gc.ca/collections/aqhi-forecasts-realtime/items?f=json&limit=10000&datetime=2026-09-24T19%3A01%3A49Z%2F2026-09-26T19%3A01%3A49Z	8519a06d4335f384
2026-09-25	forecast	2026-09-27	JAIQY	Cranbrook	Cranbrook	Pacific and Yukon	49.5	-115.767	CAN	24	2	2026-09-27T00:00:00Z	1.708	low	e0	5	6	true	2026-09-26T13:00:00Z	https://api.weather.gc.ca/collections/aqhi-forecasts-realtime/items?f=json&limit=10000&datetime=2026-09-24T19%3A01%3A49Z%2F2026-09-26T19%3A01%3A49Z	5d764979cb5ab258
2026-09-25	forecast	2026-09-27	JAQAL	Nanaimo / Parksville	Nanaimo / Parksville	Pacific and Yukon	49.167	-123.933	CAN	24	2	2026-09-27T00:00:00Z	1.292	low	e0	5	7	true	2026-09-26T13:00:00Z	https://api.weather.gc.ca/collections/aqhi-forecasts-realtime/items?f=json&limit=10000&datetime=2026-09-24T19%3A01%3A49Z%2F2026-09-26T19%3A01%3A49Z	48abc9783279ac80

Point any LLM at the metadata endpoint — the documentation above is machine-readable too (JSON-LD + Croissant).

cURL

curl "https://datazimuts.com/v1/datasets/aqhi_episode_intel/aqhi_episode_forecast_daily" | jq '{title, rows, columns_count, license}'

Python

import requests

ds = requests.get("https://datazimuts.com/v1/datasets/aqhi_episode_intel/aqhi_episode_forecast_daily").json()
print(ds["title"], ds["rows"], "rows")

# Sample rows for an LLM context window
for row in ds.get("sample_rows", [])[:5]:
    print(row)

API endpoint: https://datazimuts.com/v1/datasets/aqhi_episode_intel/aqhi_episode_forecast_daily

Tip: fetch /llms.txt for the full machine-readable catalog.

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Pinned to snapshot 20260926T190205Z-35cb88a3c2be and its content hash, so readers get exactly the data you used.

APA

Canadian AQHI Air-Quality Episode Intelligence. (2026). Canadian AQHI air-quality episode intelligence (daily) [Data set, snapshot 20260926T190205Z-35cb88a3c2be, sha256 35cb88a3c2be]. Datazimuts. Retrieved 2026-09-26, from https://datazimuts.com/en/datasets/aqhi_episode_intel/aqhi_episode_forecast_daily?snapshot=20260926T190205Z-35cb88a3c2be

BibTeX

@misc{dz_aqhi_episode_intel_aqhi_episode_forecast_35cb88a3,
  title        = {{Canadian AQHI air-quality episode intelligence (daily)}},
  author       = {{Canadian AQHI Air-Quality Episode Intelligence}},
  year         = {2026},
  publisher    = {Datazimuts},
  howpublished = {\url{https://datazimuts.com/en/datasets/aqhi_episode_intel/aqhi_episode_forecast_daily?snapshot=20260926T190205Z-35cb88a3c2be}},
  note         = {Snapshot 20260926T190205Z-35cb88a3c2be, sha256 35cb88a3c2befa0e42116d2c91c1ec17fb3d87f78a5cc4ebea5cbb1c5e7ead88; accessed 2026-09-26}
}

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Canadian AQHI air-quality episode intelligence (daily)

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