AirNow

Air quality readings, pollutant readings and air quality forecasts

Current and forecast air quality for reporting areas in the United States and covered cities in Canada and Mexico.

Get air quality

Get air quality

Get AirNow current air quality, reported pollutant readings, and today’s and tomorrow’s forecasts for a US city or ZIP code, or a covered Canadian or Mexican city. A forecast AQI or an entire forecast may be unavailable even when a category or current reading is shown.

Your information

Location

City and state, a five-digit US ZIP code, or a covered Canadian or Mexican city, for example Denver, CO or 94103.

1 credit per run

Example results

Aqi: 42
Category: Good
Airnow URL: airnow.gov
Health Advice: Air quality is good. Enjoy outdoor activities.
Main Pollutant: PM10
Reporting Area: Denver-Boulder, CO
Observation Time: 2026-09-29T05:00:00-06:00
Today Forecast Aqi: Not provided
Forecast Discussion: Not provided
Today Forecast Date: 2026-09-29
Tomorrow Forecast Aqi: Not provided
Tomorrow Forecast Date: 2026-09-30
Today Forecast Category: Good
Tomorrow Forecast Category: Not provided
Pollutants: Pollutants
Aqi Category Pollutant
26
Good
Ozone
16
Good
PM2.5
42
Good
PM10

Pollutants
Aqi	Category	Pollutant
26	Good	Ozone
16	Good	PM2.5
42	Good	PM10

Example data · Run in Studio for fresh results.

About AirNow

AirNow returns current air quality, pollutant readings, and today’s and tomorrow’s forecasts.

Get air quality needs a US city and state or five-digit ZIP code, or a covered Canadian or Mexican city.

Built by Fous from airnow.gov and geocode.arcgis.com and checked automatically; it last passed a check on Sep 29, 2026. Fous is not affiliated with AirNow.

Actions

Get air quality

1 credit per run

Uses geocode.arcgis.com.

What you provide

Field	Type	Required	Description
Location`location`	Text	Required	City and state, a five-digit US ZIP code, or a covered Canadian or Mexican city, for example Denver, CO or 94103.Example: Denver, CO

What you get

Field	Type	Description
Aqi`aqi`	Number	Example: 42
Category`category`	Text	Example: Good
Airnow URL`airnow_url`	Text	Example: https://www.airnow.gov/?reportingArea=Denver-Boulder&stateCode=CO
Pollutants`pollutants`	List
Aqi`pollutants[].aqi`	Number	Example: 26
Category`pollutants[].category`	Text	Example: Good
Pollutant`pollutants[].pollutant`	Text	Example: Ozone
Health Advice`health_advice`	Text	Example: Air quality is good. Enjoy outdoor activities.
Main Pollutant`main_pollutant`	Text	Example: PM10
Reporting Area`reporting_area`	Text	Example: Denver-Boulder, CO
Observation Time`observation_time`	Text	Example: 2026-09-29T05:00:00-06:00
Today Forecast Aqi`today_forecast_aqi`	Number	Example: 53
Forecast Discussion`forecast_discussion`	Text
Today Forecast Date`today_forecast_date`	Text	Example: 2026-09-29
Tomorrow Forecast Aqi`tomorrow_forecast_aqi`	Number
Tomorrow Forecast Date`tomorrow_forecast_date`	Text	Example: 2026-09-30
Today Forecast Category`today_forecast_category`	Text	Example: Good
Tomorrow Forecast Category`tomorrow_forecast_category`	Text	Example: Moderate

Example result

For Location: Denver, CO

JSON

{
  "aqi": 42,
  "category": "Good",
  "airnow_url": "https://www.airnow.gov/?reportingArea=Denver-Boulder&stateCode=CO",
  "pollutants": [
    {
      "aqi": 26,
      "category": "Good",
      "pollutant": "Ozone"
    },
    {
      "aqi": 16,
      "category": "Good",
      "pollutant": "PM2.5"
    },
    {
      "aqi": 42,
      "category": "Good",
      "pollutant": "PM10"
    }
  ],
  "health_advice": "Air quality is good. Enjoy outdoor activities.",
  "main_pollutant": "PM10",
  "reporting_area": "Denver-Boulder, CO",
  "observation_time": "2026-09-29T05:00:00-06:00",
  "today_forecast_aqi": null,
  "forecast_discussion": null,
  "today_forecast_date": "2026-09-29",
  "tomorrow_forecast_aqi": null,
  "tomorrow_forecast_date": "2026-09-30",
  "today_forecast_category": "Good",
  "tomorrow_forecast_category": null
}

For developers

Run this workflow from your own code. In Studio, turn on Developer mode and create an API key.

cURL

# First set your key: export FOUS_API_KEY='YOUR_FOUS_API_KEY'
: "${FOUS_API_KEY:?Set FOUS_API_KEY before running this example}"

curl 'https://api.fous.com/v1/query' \
  --fail-with-body --silent --show-error --max-time 120 \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "api": "@airnow",
  "visibility": "public",
  "operation": "get_air_quality",
  "version": 1,
  "input": {
    "location": "Denver, CO"
  },
  "response": {
    "format": "json"
  }
}'

What you can do with it

Check reported air quality for a location
Compare pollutant readings across locations
Review today’s and tomorrow’s air quality forecasts
Share health advice with local teams

Questions

Is Fous affiliated with AirNow?

No. Fous is not affiliated with AirNow. This workflow reads the public airnow.gov website and returns its data.

How much does it cost?

Each run costs 1 credit. With pay-as-you-go, a credit costs 1¢; monthly plans cost less per credit.

Do I need a AirNow account?

No. You only need a Fous account.

How current is the data?

Fous gets the data from airnow.gov when you run it; repeating the same request within a day may return the saved result. Fous checks this workflow automatically; it last passed a check on Sep 29, 2026.