Atmy air quality

Single sensors with their latest reading (PM1, PM2.5, PM10, temperature, humidity, pressure), network and quality check: status, rating 0–10 of the last checked day, the mean rating of the last 7 days and the reasons. Filter by city, country, or a point with a radius; sort=rating puts the most reliable sensors first.

PM2.5 now in a city (mean of the latest reading of each eligible sensor, at most 60 minutes old; a government station hour up to 3 hours old, with the time it was measured) with its US EPA category and the weather now (temperature, humidity, pressure, wind, clouds, precipitation), plus the last completed day from the Atmy Data Hub with its weather. Pass city or lat/lon.

Daily PM2.5 of a city from the Atmy Data Hub (UTC days, sensors after the quality check) with the day's weather from 2026-01-19 (mean, lowest and highest temperature, humidity, pressure, wind, strongest gust, clouds): the last days, or any period since 2017 with from/to, at most 400 days per call. For the whole history or records use get_air_quality_monthly first.

The whole measurement history of a city from the Atmy Data Hub: PM2.5 per month with the month's weather from 2026-01, yearly means (complete years marked), the dirtiest and cleanest months and days. For questions like "how has the air changed" or "the most polluted month on record".

The next hours of a city: temperature, wind, humidity, precipitation and the pollution accumulation index 0–100 (how strongly the weather keeps particles near the ground). A weather estimate, not a PM2.5 forecast.

Cities of a country ranked by daily PM2.5 for the last completed day (Atmy Data Hub), most polluted or cleanest first.

Greenery and emission sources around a point (a home): tree canopy share within 300 m, green land share and summer NDVI within 500 m with a low/medium/high level against the rest of the city, the nearest park, up to 10 emission sources (power plants, works and mines within 5 km, landfills within 3 km, boiler houses and single chimneys within 1.5 km) chosen by significance (high/medium/low, from emissions, fuel and size) and distance, with distance, bearing, fuel, confidence, significance, wind_exposure (the share of the time the wind blows from the source to the home, from the wind rose of the region) stack_height_m (smoke from a tall chimney comes down some 10 heights downwind) and, for facilities in the Climate TRACE registry, yearly CO2e; traffic: the nearest motorway, trunk, primary and secondary road and railway within 500 m with a low/medium/high level by distance; terrain: the ground against the mean within 2 km (hollow/level/elevated, Copernicus DEM); measured_air: the yearly and winter PM2.5 mean, days per EPA category and the worst month of the nearest Atmy sensor within 2 km with a year of quality-checked days, and the median of the sensors around (approximate, not official monitoring); and the number of detached houses within 1 km (an estimate of stove smoke, not a count of stoves). Only computed cities; elsewhere the error city_not_covered.

One sensor by its id: location, network, license, quality check with rating and reasons, and the latest reading.

Readings of one sensor: raw (the last 31 days, at most 7 days a call), 5-minute means (the same windows), hourly means (the last 366 days, at most 92 days a call) or daily means (UTC days of the last 366 days, with the quality check of each day). Default: the last 24 hours, or 30 days by day. Times are UTC.

The mean of up to 100 sensors per 5 minutes, hour or UTC day, each sensor counted once per bucket, with the number of sensors in each bucket. Windows as in get_sensor_readings; by day at most 92 days a call.

The sensor networks in Atmy (Sensor.Community, AirGradient, Atmy, and government stations of official networks) with their number of sensors, how many pass the quality check, and their license.

Find the cities with an Atmy air-quality summary by name (any language) or country. Returns slugs to pass to the other tools.