Recent Conditions in Air Quality (PM2.5)

This app shows the latest values for global air quality (PM2.5) from ground-based monitoring stations compiled by OpenAQ.

This app is part of Indicators of the Planet.  Please see https://livingatlas.arcgis.com/indicators

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 2.5 micrometers or less (PM2.5) 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 PM2.5 increases the risk of respiratory and cardiovascular illnesses. The World Health Organization (WHO) guidelines provide long-term and short-term exposure limits to PM2.5:

  • Long-term: 10 µg/m³ annual mean
  • Short-term: 36 µg/m³ 24-hour mean
Exposure to PM2.5 above these limits may significantly impact human health.
The source information is the OpenAQ community which reports measured concentrations of PM2.5 (µg/m³) on a global scale by aggregating station data from national networks of air quality.
The Recent Conditions in Air Quality (PM2.5) layer is updated every hour using the Aggregated Live Feed (ALF) methodology. It shows the latest PM2.5 value of the stations in the OpenAQ data set with at least one value reported in the past 30 days. Additionally, a Learn ArcGIS lesson is available for implementing one version of the ALF methodology.

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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.
Recent Conditions in Air Quality (PM2.5)
Description
A description of the dataset.

This app shows the latest values for global air quality (PM2.5) from ground-based monitoring stations compiled by OpenAQ.

This app is part of Indicators of the Planet.  Please see https://livingatlas.arcgis.com/indicators

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 2.5 micrometers or less (PM2.5) 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 PM2.5 increases the risk of respiratory and cardiovascular illnesses. The World Health Organization (WHO) guidelines provide long-term and short-term exposure limits to PM2.5:

  • Long-term: 10 µg/m³ annual mean
  • Short-term: 36 µg/m³ 24-hour mean
Exposure to PM2.5 above these limits may significantly impact human health.
The source information is the OpenAQ community which reports measured concentrations of PM2.5 (µg/m³) on a global scale by aggregating station data from national networks of air quality.
The Recent Conditions in Air Quality (PM2.5) layer is updated every hour using the Aggregated Live Feed (ALF) methodology. It shows the latest PM2.5 value of the stations in the OpenAQ data set with at least one value reported in the past 30 days. Additionally, a Learn ArcGIS lesson is available for implementing one version of the ALF methodology.
Tags / Keywords
Keywords/tags categorizing the dataset.
Format (CSV, XLS, TXT, PDF, etc)
File format of the dataset.
Dataset Size
Dataset size in megabytes.
2.3
Metadata Identifier
Metadata identifier – can be used as the unique identifier for catalogue entry
Published Date
Published date of the dataset.
2020-07-10
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/arcgis-content::recent-conditions-in-air-quality-pm2-5-1
Data Service
Data service for accessing a dataset.
Owner
Owner of the dataset.
EMeriam
Contact Point
Who to contact regarding access?
ArcGIS Living Atlas Team
Contact Point Email
The email to contact regarding access?
Publisher
Publisher of the dataset.
ArcGIS Living Atlas Team
Publisher Email
Email of the publisher.
Author
Author of the dataset.
EMeriam
Author Email
Email of the author.
Accessed At
Date the data and metadata was accessed.
2020-07-14
Field Value
Identifier
Unique identifier for the dataset.
978637bfe94b48869d0000fae306e030
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/arcgis-content::recent-conditions-in-air-quality-pm2-5-1
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.
ArcGIS Living Atlas Team
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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