Parameters

The Parameters resource provides information about the air quality parameters in the dataset, such as PM2.5, CO, NO2, among many others. With this resource, you will find details about different types of pollutant and meteorological data that OpenAQ ingests, such as name, unit of measurement, and description.

Methods

The Parameters resource provides the following methods:

• get() - For accessing a single parameter by parameter ID.
• list() - For accessing multiple parameters.
• latest() - For accessing the latest measurements of the specified parameter at all locations reporting it on the OpenAQ platform.

Get a single parameter

The get() method accepts one single parameters_id as an argument and returns details about that parameter in a ParametersResponse object.

get(
  parameters_id: int
  ) -> ParametersResponse

Query arguments

argument	description	input requirements
parameters_id	int OpenAQ’s unique ID for each parameter	Required

Example

from openaq import OpenAQ

# Retrieve the parameter with ID 2
with OpenAQ(api_key="your-api-key") as client:
    client.parameters.get(parameters_id=2)

List multiple parameters

The list() method takes optional arguments and returns parameters on the OpenAQ platform that meet all the conditions specified in a ParametersResponse object. If no argument is included, the method returns all parameters using the default arguments.

list(
  page: int = 1,
  limit: int = 1000,
  order_by: str | None = None,
  sort_order: SortOrder | None = None,
  parameter_type: ParameterType | None = None,
  coordinates: tuple[float, float] | None = None,
  radius: int | None = None,
  bbox: tuple[float, float, float, float] | None = None,
  iso: str | None = None,
  countries_id: int | list[int] | None = None
  ) -> ParametersResponse

Query arguments

argument	description	input requirements
page	int The page number to retrieve, defaults to 1	Must be greater than zero
limit	int The number of results returned per page, defaults to 1,000	Must be between 1 and 1,000
order_by	str | None The license field by which to sort results, defaults to id. Currently only id is supported
sort_order	str | None The sort direction for the order_by field, defaults to desc	Must be one of: asc, desc, ASC, DESC
parameter_type	str | None	The type of parameter to return
coordinates	tuple[float, float] | None The geographic position of a point from which to search for available parameters	Must be in WGS84 (EPSG:4326) in (latitude, longitude) or (Y, X) format and accompanied by radius. Cannot be used at the same time as bbox
radius	int | None How far (in meters) to search for parameters around the coordinate pair	Must be between 1 and 25,000. Must be accompanied by coordinates argument. Cannot be used at the same time as bbox
bbox	tuple[float, float, float, float] | None The rectangular area within which parameters are searched for and returned	Must be in WGS84 (EPSG:4326) and (minX, minY, maxX, maxY) format with maximum 4 decimals precision. Cannot be used at the same time as coordinates or radius
iso	str | None The ISO 3166-1 alpha-2 code for the country or territory where the parameters are measured	Must be a valid ISO 3166-1 alpha-2 code representation of the country. Cannot be used at the same time as countries_id
countries_id	int | list[int] | None Filter by the country or territory where the parameters are measured	Must be OpenAQ unique ID for the country or territory. Cannot be used at the same time as iso

Example

from openaq import OpenAQ

# List all meteorological parameters that OpenAQ ingests
with OpenAQ(api_key="replace-me-with-a-valid-key") as client:
    client.parameters.list(parameter_type="meteorological")

Caution

This example uses a placeholder API key `replace-me-with-a-valid-key` and will not work as-is. Replace this value with a valid OpenAQ API key.

List latest measurements from a parameter

The latest() method takes one single parameters_id as an argument and returns the last measurement readings for that parameter across all locations in OpenAQ database in a LatestResponse object.

latest(
  parameters_id: int
  ) -> LatestResponse

Query arguments

argument	description	input requirements
parameters_id	int OpenAQ’s unique ID for each parameter	Required

Example

from openaq import OpenAQ

# Retrieve the latest measurement readings for PM2.5 (parameter ID 2) at all
# locations on OpenAQ
with OpenAQ(api_key="your-api-key") as client:
    client.parameters.latest(parameters_id=2)

Response objects

The Parameter and Latest objects in the results of their respective response contain attributes that have all data about them. The hierarchy below presents the depth of the attributes and their datatypes.

ParametersResponse

results[]
    ├── id: int
    ├── name: str
    ├── units: str
    ├── display_name: str | None
    └── description: str | None

LatestResponse

results[]
    ├── datetime:
    │   ├── utc: str
    │   └── local: str
    ├── value: float
    ├── coordinates:
    │   ├── latitude: float
    │   └── longitude: float
    ├── sensors_id: int
    └── locations_id: int