OpenAQ Recent Conditions in Air Quality

This layer shows the latest values for global air quality from ground-based monitoring stations compiled by OpenAQ and updated hourly.

Every day activities such as driving, burning coal for electricity, wildfires, running factories, even cooking and cleaning, release particles into the air. Besides being an irritant, small particles of 10, 2.5, 1 micrometers (PM10, PM2.5, PM1) or less are a health hazard since they can get deep into the respiratory system and damage the delicate tissues.

The exposure of populations to high levels of small particles increases the risk of respiratory and cardiovascular illnesses. The World Health Organization (WHO) guidelines provide long-term and short-term exposure limits to PM10 and PM2.5:

  • Long-term: PM10 20 µg/m³ annual mean and PM2.5 10 µg/m³
  • Short-term: PM10 50 µg/m³ 24-hour mean and PM2.5 25 µg/m³
Exposure to PM10 and PM2.5 above these limits may significantly impact human health.
The OpenAQ Recent Conditions in Air Quality layers show the latest mass concentrations and particulate count for PM2.5, PM10, and PM1 of the stations in the OpenAQ data set with at least one value reported in the past 30 days.

Source: The source information is the OpenAQ community which reports measured concentrations (µg/m³) and particle matter count (particles/cm³) on a global scale by aggregating station data from national networks of air quality.
Update Frequency: It is updated every hour using the Aggregated Live Feed (ALF) methodology.
Area Covered: Global
Revisions
  • Jan 25, 2025: Upgrade to OpenAQ API version 3"
  • Jan 18, 2024: Update to feed routine that allows stations w/o an identifier.
  • Jun 23, 2023: Added new fields: Location ID, Station URL; Provider, and Instrument names. The live feed routine was updated to increase reliability and improve the overall update process.
  • Jul 21, 2022: Added service to Live Feed Status Page for active monitoring!
  • Feb 8, 2022: Update of live feed routine to use OpenAQ API v2:
    • Addition of PM10 and PM1 layers.
    • Values of particle matter count (particles/cm³) to all layers.
    • Update of field labels.
    • Removal of SourceName field.
  • Feb 5, 2020: Official release of Feature Service offering.
This layer is provided for informational purposes and is not monitored 24/7 for accuracy and currency.
If you would like to be alerted to potential issues or simply see when this Service will update next, please visit our Live Feed Status Page!

Datasets available for download

Additional Info

Field Value
Last Updated March 24, 2026, 21:07 (UTC)
Created March 24, 2026, 21:07 (UTC)
Domain / Topic
Domain or topic of the dataset being cataloged.
Title
Title for the Dataset.
OpenAQ Recent Conditions in Air Quality
Description
A description of the dataset.

This layer shows the latest values for global air quality from ground-based monitoring stations compiled by OpenAQ and updated hourly.

Every day activities such as driving, burning coal for electricity, wildfires, running factories, even cooking and cleaning, release particles into the air. Besides being an irritant, small particles of 10, 2.5, 1 micrometers (PM10, PM2.5, PM1) or less are a health hazard since they can get deep into the respiratory system and damage the delicate tissues.

The exposure of populations to high levels of small particles increases the risk of respiratory and cardiovascular illnesses. The World Health Organization (WHO) guidelines provide long-term and short-term exposure limits to PM10 and PM2.5:

  • Long-term: PM10 20 µg/m³ annual mean and PM2.5 10 µg/m³
  • Short-term: PM10 50 µg/m³ 24-hour mean and PM2.5 25 µg/m³
Exposure to PM10 and PM2.5 above these limits may significantly impact human health.
The OpenAQ Recent Conditions in Air Quality layers show the latest mass concentrations and particulate count for PM2.5, PM10, and PM1 of the stations in the OpenAQ data set with at least one value reported in the past 30 days.

Source: The source information is the OpenAQ community which reports measured concentrations (µg/m³) and particle matter count (particles/cm³) on a global scale by aggregating station data from national networks of air quality.
Update Frequency: It is updated every hour using the Aggregated Live Feed (ALF) methodology.
Area Covered: Global
Revisions
  • Jan 25, 2025: Upgrade to OpenAQ API version 3"
  • Jan 18, 2024: Update to feed routine that allows stations w/o an identifier.
  • Jun 23, 2023: Added new fields: Location ID, Station URL; Provider, and Instrument names. The live feed routine was updated to increase reliability and improve the overall update process.
  • Jul 21, 2022: Added service to Live Feed Status Page for active monitoring!
  • Feb 8, 2022: Update of live feed routine to use OpenAQ API v2:
    • Addition of PM10 and PM1 layers.
    • Values of particle matter count (particles/cm³) to all layers.
    • Update of field labels.
    • Removal of SourceName field.
  • Feb 5, 2020: Official release of Feature Service offering.
This layer is provided for informational purposes and is not monitored 24/7 for accuracy and currency.
If you would like to be alerted to potential issues or simply see when this Service will update next, please visit our Live Feed Status Page!
Tags / Keywords
Keywords/tags categorizing the dataset.
Format (CSV, XLS, TXT, PDF, etc)
File format of the dataset.
Dataset Size
Dataset size in megabytes.
0.0
Metadata Identifier
Metadata identifier – can be used as the unique identifier for catalogue entry
Published Date
Published date of the dataset.
2020-02-06
Time Period Data Span (start date)
Start date of the data in the dataset.
Time Period Data Span (end date)
End date of time data in the dataset.
GeoSpatial Area Data Span
A spatial region or named place the dataset covers.
Field Value
Access category
Type of access granted for the dataset (open, closed, service, etc).
public
License
License used to access the dataset.
This work is licensed under the Esri Master License Agreement. View Summary | View Terms of Use
Limits on use
Limits on use of data.
Location
Location of the dataset.
https://climate.esri.ca/datasets/esri2::openaq-recent-conditions-in-air-quality
Data Service
Data service for accessing a dataset.
Owner
Owner of the dataset.
esri_livefeeds2
Contact Point
Who to contact regarding access?
Esri
Contact Point Email
The email to contact regarding access?
Publisher
Publisher of the dataset.
Esri
Publisher Email
Email of the publisher.
Author
Author of the dataset.
esri_livefeeds2
Author Email
Email of the author.
Accessed At
Date the data and metadata was accessed.
2026-03-23
Field Value
Identifier
Unique identifier for the dataset.
8dcf5d4e124f480fa8c529fbe25ba04e
Language
Language(s) of the dataset
English
Link to dataset description
A URL to an external document describing the dataset.
https://climate.esri.ca/datasets/esri2::openaq-recent-conditions-in-air-quality
Persistent Identifier
Data is identified by a persistent identifier.
Globally Unique Identifier
Data is identified by a persistent and globally unique identifier.
Contains data about individuals
Does the data hold data about individuals?
Contains data about identifiable individuals
Does the data hold identifiable data about individual?
Contains Indigenous Data
Does the data hold data about Indigenous communities?
Portal Type
Platform type of the source portal.
Field Value
Version
Version of the datatset
None
Source
Source of the dataset.
None
Version notes
Version notes about the dataset.
Is version of another dataset
Link to dataset that it is a version of.
Other versions
Link to datasets that are versions of it.
Provenance Text
Provenance Text of the data.
Esri
Provenance URL
Provenance URL of the data.
Temporal resolution
Describes how granular the date/time data in the dataset is.
GeoSpatial resolution in meters
Describes how granular (in meters) geospatial data is in the dataset.
GeoSpatial resolution (in regions)
Describes how granular (in regions) geospatial data is in the dataset.
Field Value
Indigenous Community Permission
Who holds the Indigenous Community Permission. Who to contact regarding access to a dataset that has data about Indigenous communities.
Community Permission
Community permission (who gave permission).
The Indigenous communities the dataset is about
Indigenous communities from which data is derived.
Field Value
Number of data rows
If tabular dataset, total number of rows.
Number of data columns
If tabular dataset, total number of unique columns.
Number of data cells
If tabular dataset, total number of cells with data.
Number of data relations
If RDF dataset, total number of triples.
Number of entities
If RDF dataset, total number of entities.
Number of data properties
If RDF dataset, total number of unique properties used by the triples.
Data quality
Describes the quality of the data in the dataset.
Metric for data quality
A metric used to measure the quality of the data, such as missing values or invalid formats.

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