Atmy Air Quality for Home Assistant

PM2.5 of your city from Atmy: public and citizen sensor networks (Sensor.Community, AirGradient, Nebo and others) after the Atmy Data Hub's quality check, refreshed every 15 minutes. No account and no key.

Sensors

Entity	What it shows
PM2.5	The city's mean PM2.5 now, µg/m³ (attributes: min, max, median)
US AQI	The US EPA air quality index (2024 scale) from that PM2.5
Air quality	Good, moderate, unhealthy for sensitive groups, unhealthy, very unhealthy, hazardous
PM2.5 yesterday	The last completed day on the Atmy Data Hub
Pollution accumulation	0–100: how strongly the weather keeps particles near the ground now (attributes: the next 24 hours, the maximum of the next 12)
Temperature, Humidity, Pressure, Wind speed, Wind gusts	The weather Atmy keeps for the city (attributes: feels like, condition, wind direction, time of the reading)
Sensors, Updated	Diagnostics: sensors in the mean and their networks, the time of the values

Install

HACS: HACS → ⋮ → Custom repositories → add https://github.com/Atmy-ai/atmy-home-assistant, category Integration → install Atmy Air Quality → restart Home Assistant.

Manually: copy custom_components/atmy into config/custom_components/ and restart Home Assistant.

Then Settings → Devices & services → Add integration → Atmy. Leave the city empty to use the city nearest to your home (within 50 km), or type a city name in any language. Add the integration again for more cities.

Data

Weather: Open-Meteo.com (CC BY 4.0), read from Atmy's own copy; the integration never calls a weather provider.

Documentation: https://atmy.ai/developers/home-assistant/ · Issues: https://github.com/Atmy-ai/atmy-home-assistant/issues

Values are approximate: low-cost optical sensors, not official monitoring. Methodology: https://atmy.ai/air-quality/methodology/ · API: https://atmy.ai/air-quality/api/ · Data terms: https://atmy.ai/legal/data/