Air Quality
Ambient air pollutant concentrations at a place and time, assessed against limit values.
Bundle → Layer → Finding → Questions Filled
3 bundles · 4 layers · 6 findings · 13 questions
Assessment What is assessed, where and for which period.
Zone and station
The assessment zone and the stations or model grid that represent it.
Assessment unit
The zone, agglomeration or station the assessment refers to.
- Which zone or station does this air quality value refer to?
- Is the station classified as traffic, industrial or background, urban or rural?
- Who operates the station, and under which monitoring network?
Pollutant and period
Which pollutant is assessed over which averaging period.
Pollutant and averaging
The pollutant with its averaging time and reporting period.
- Which pollutant is assessed, such as PM2.5, PM10, NO2 or ozone?
- Which averaging period applies, such as hourly, daily or annual?
Measurement How values were obtained and how far they can be trusted.
Method and quality
Measurement or modelling method with its quality checks.
Method
Whether the value was measured by a reference method, an equivalent method, a sensor or a model.
- Was the value measured by a reference or equivalent method, a low-cost sensor or a model?
- Has the value been validated, or is it provisional?
Data coverage
The share of valid data in the period, which decides whether the value can be reported.
- How much of the period is covered by valid data?
- Were gaps filled, and by which method?
Compliance and communication How values compare to limits and how the public is told.
Limit values and indices
Comparison with legal limits, guidelines and public indices.
Exceedance
Whether a limit, target or information threshold was exceeded.
- Which limit or guideline value applies to this pollutant and period?
- Was it exceeded, and how many times in the reporting year?
Public index
The air quality index category communicated to the public.
- Which index scheme is used, and which category does the value fall in?
- Which health advice accompanies the category?
Classifiers Filled
- Family
- World Models
- Category
- Physical world and living systems
- Entry kind
- standalone-mm
- Navigation path
- NAV.PHY.EAR.AIRQ
- Domain
- PHY.EAR.AIRQ
- Industry
- Cross-industry
- Tags
- airqualityphy.ear.airq
What it is Filled
Air quality is the state of the ambient outdoor air at a place and time, expressed as concentrations of pollutants measured or modelled against limit values and indices. It covers assessments for a zone or station, not the emissions from sources, which are fluxes, nor indoor air, which belongs to the indoor environment of a building.
Why it exists Filled
Ambient air pollutant concentrations at a place and time, assessed against limit values.
Distinguishing features Filled
- It describes the state of ambient air, not the emissions that cause it, which belong to emission and flux records.
- Values are only meaningful with pollutant, averaging period, location and method stated together.
- Indoor air of buildings and workplace exposure are outside the class.
- Weather and climate describe the physical atmosphere; air quality describes its pollutant load.
What robots and AI may and may not do Filled
Must not
- Present sensor or model estimates as reference measurements.
- Report a value without its averaging period and location.
- Declare a legal exceedance or compliance on behalf of the competent authority.
- Give individual medical advice based on air quality data.
- Alter validated monitoring data.
Only with a human decision
- Issuing public alerts or smog warnings.
- Declaring official compliance or exceedance of legal limits.
- Siting or closing a reference monitoring station.
May
- Read and report air quality values with their pollutant, period, station and method.
- Compare values with the applicable limit values and index categories.
- Flag provisional or low-coverage data as such when reporting it.
- Relay official health advice linked to an index category.
Moral aspects Filled
- Poor air quality harms health, and the burden often falls on poorer neighbourhoods near traffic and industry.
- Understated or delayed information prevents vulnerable people from protecting themselves.
- Low-cost sensor data can mislead when its uncertainty is not explained.
Who is affected
- Residents, especially children, older people and people with respiratory disease
- Environmental and health authorities
- Industry and transport operators
- Outdoor workers
Owners Filled
Steward
The environmental authority responsible for ambient air assessment in a territory.
Master systems
- National air quality monitoring network database
- Regional or international air quality reporting repository
Links to other meta-models Filled
references
- wm-ear-012-environmental-monitoring-station - Values are measured at monitoring stations.
related
- world-f6-emission-and-environmental-flux - Emissions are the sources that shape air quality.
neighbor
- world-p4-atmosphere-weather-and-climate - Weather governs dispersion of pollutants.
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- An assessment is identified by station or zone code, pollutant and period.
- Stations carry codes from national networks and international reporting repositories.
- Pollutants are identified by name and, where useful, CAS number.
Direct properties required Filled
- Concentration of particulate matter PM2.5 and PM10 in micrograms per cubic metre, with averaging period.
- Concentration of nitrogen dioxide, ozone, sulphur dioxide and carbon monoxide in their legal units, with averaging period.
- Data coverage of the period as a percentage of valid measurements.
- Measurement uncertainty, stated for the method used.
- Meteorological conditions at the time, such as wind and temperature, where used for interpretation.
Recognition required Filled
- A value is recognised by pollutant, unit, averaging period, location and time.
- Often confused with emission rates, indoor air readings or weather forecasts.
Capabilities and actions required Filled
- Values can be aggregated over time into daily, monthly and annual statistics.
- Values can be compared with limit values and mapped to index categories.
- Forecasts can be issued from models combined with measurements.
Hazards and failure modes required Filled
- Exposure to high pollutant levels causes respiratory and cardiovascular harm.
- Misleading data from uncalibrated sensors.
- Gaps in monitoring that hide pollution episodes.
Standards and interfaces required Filled
- EU Air Quality e-Reporting data flows under Directive 2008/50/EC.
- OGC SensorThings API for sensor observations.
- WHO Global Air Quality Guidelines as reference values.
Context of use required Filled
- Ambient air quality is regulated by law in many jurisdictions, with limit values and public information duties.
- Used in public health, urban planning, traffic management and environmental reporting.
Sources Filled
- WHO global air quality guidelines (2021), World Health Organization
- Directive 2008/50/EC on ambient air quality and cleaner air for Europe, European Union
Open questions
- Planned model: boundary questions, research and every section remain to be written.
Machine files
Provenance
planned (registry candidate) · todo
Built from: models/runtime-index.json, ver-cy/world-models/card-supplements/wm-ear-007-air-quality.json
Planned entry, hidden from the catalogue until researched.