Air Quality Annual Summary — Cary, NC Open Data

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Part of What Works Cities Certification is reporting our city's annual average concentration of PM2.5 (fine particular matter) does not exceed 10 milligrams per cubic meter.

The information is sensor data from the Triple Oak Site (Site Number 0021) and Millbrook School (Site Number 0014).

Please look to the Dataset Schema section below for descriptions of columns and data types.

US Environmental Protection Agency. Air Data App Map [internet database] available at https://www.epa.gov/outdoor-air-quality-data/interactive-map-air-quality-monitors. Accessed January 10, 2023.

US Environmental Protection Agency. Air Quality System Data Mart [internet database] available at http://www.epa.gov/ttn/airs/aqsdatamart. Accessed January 10, 2023.

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Dataset schema

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State Code

State Geographies Code for NC is 37

No description available for this field.

Name (identifier)	state_code
Type	integer
Sample

County Code

Wake County Geographies Code is 183

No description available for this field.

Name (identifier)	county_code
Type	integer
Sample

Site Number

Site Number

No description available for this field.

Name (identifier)	site_number
Type	text
Sample

Parameter Code

The AQS code corresponding to the parameter measured by the monitor.

No description available for this field.

Name (identifier)	parameter_code
Type	integer
Sample

POC

This is the “Parameter Occurrence Code” used to distinguish different instruments that measure the same parameter at the same site.

No description available for this field.

Name (identifier)	poc
Type	integer
Sample

Latitude

The monitoring site’s angular distance north of the equator measured in decimal degrees.

No description available for this field.

Name (identifier)	latitude
Type	decimal
Sample

Longitude

The monitoring site’s angular distance east of the prime meridian measured in decimal degrees.

No description available for this field.

Name (identifier)	longitude
Type	decimal
Sample

Datum

The Datum associated with the Latitude and Longitude measures.

No description available for this field.

Name (identifier)	datum
Type	text
Sample

Parameter Name

The name or description assigned in AQS to the parameter measured by the monitor. Parameters may be pollutants or non-pollutants.

No description available for this field.

Name (identifier)	parameter_name
Type	text
Sample

Duration Description

Duration Description

No description available for this field.

Name (identifier)	duration_description
Type	text
Sample

Pollutant Standard

A description of the ambient air quality standard rules used to aggregate statistics.

No description available for this field.

Name (identifier)	pollutant_standard
Type	text
Sample

Year

Year

No description available for this field.

Name (identifier)	year
Type	date
Sample

Units of Measure

The unit of measure for the parameter. QAD always returns data in the standard units for the parameter. Submitters are allowed to report data in any unit and EPA converts to a standard unit so that we may use the data in calculations.

No description available for this field.

Name (identifier)	units_of_measure
Type	text
Sample

Exceptional Data Type

An example of an exceptional event would be a wildfire; it is something that affects air quality, but the local agency has no control over. No Events means no events occurred. Events Included means events occurred and the data from them is included in the summary. Events Excluded means that events occurred but data form them is excluded from the summary. Concurred Events Excluded means that events occurred but only EPA concurred exclusions are removed from the summary. If an event occurred for the parameter in question, the data will have multiple records for each monitor.

No description available for this field.

Name (identifier)	exceptional_data_type
Type	text
Sample

Observation Count

The number of observations (samples) taken during the year.

No description available for this field.

Name (identifier)	observation_count
Type	integer
Sample

Observation Percent

The percent representing the number of observations taken with respect to the number scheduled to be taken during the year. This is only calculated for monitors where measurements are required (e.g., only certain parameters).

No description available for this field.

Name (identifier)	observation_percent
Type	integer
Sample

Primary Exceedance Count

The number of samples during the year that exceeded the primary air quality standard.

No description available for this field.

Name (identifier)	primary_exceedance_count
Type	decimal
Sample

Secondary Exceedance Count

The number of samples during the year that exceeded the secondary air quality standard.

No description available for this field.

Name (identifier)	secdary_exceedance_count
Type	decimal
Sample

Valid Day Count

The number of days during the year where the daily monitoring criteria were met, if the calculation of the summaries is based on valid days.

No description available for this field.

Name (identifier)	valid_day_count
Type	integer
Sample

Required Day Count

The number of days during the year which the monitor was scheduled to take samples if measurements are required.

No description available for this field.

Name (identifier)	required_day_count
Type	integer
Sample

Exceptional Data Count

The number of data points in the annual data set affected by exceptional air quality events (things outside the norm that affect air quality).

No description available for this field.

Name (identifier)	exceptional_data_count
Type	integer
Sample

Certification Indicator

An indication whether the completeness and accuracy of the information on the annual summary record has been certified by the submitter. Certified means the submitter has certified the data (due May 01 the year after collection). Certification not required means that the parameter does not require certification or the deadline has not yet passed. Uncertified (past due) means that certification is required but is overdue. Requested but not yet concurred means the submitter has completed the process, but EPA has not yet acted to certify the data. Requested but denied means the submitter has completed the process, but EPA has denied the request for cause. Was certified but data changed means the data was certified but data was replaced and the process has not been repeated.

No description available for this field.

Name (identifier)	certification_indicator
Type	text
Sample

Null Data Count

The count of scheduled samples when no data was collected and the reason for no data was reported.

No description available for this field.

Name (identifier)	null_data_count
Type	integer
Sample

Half MDL Sub Count

The number of samples reported during the year that were below the method detection limit (MDL) for the monitoring instrument, multiplied by 1/2. Sometimes these values are used in place of the MDL in summary calculations.

No description available for this field.

Name (identifier)	half_mdl_sub_count
Type	integer
Sample

Arithmetic Mean

The average (arithmetic mean) value for the year.

No description available for this field.

Name (identifier)	arithmetic_mean
Type	decimal
Sample

Arithmetic Standard Dev

The standard deviation about the mean of the values for the year.

No description available for this field.

Name (identifier)	arithmetic_standard_dev
Type	decimal
Sample

Weighted Arithmetic Mean

Weighted Arithmetic Mean

No description available for this field.

Name (identifier)	weighted_arithmetic_mean
Type	integer
Sample

Minimum Value

No description available for this field.

Name (identifier)	minimum_value
Type	decimal
Sample

First Maximum Value

No description available for this field.

Name (identifier)	first_maximum_value
Type	decimal
Sample

First Maximum DateTime

No description available for this field.

Name (identifier)	first_maximum_datetime
Type	datetime
Sample

Second Maximum Value

No description available for this field.

Name (identifier)	second_maximum_value
Type	decimal
Sample

Second Maximum DateTime

No description available for this field.

Name (identifier)	second_maximum_datetime
Type	datetime
Sample

Third Maximum Value

No description available for this field.

Name (identifier)	third_maximum_value
Type	decimal
Sample

Third Maximum DateTime

No description available for this field.

Name (identifier)	third_maximum_datetime
Type	datetime
Sample

Fourth Maximum Value

No description available for this field.

Name (identifier)	fourth_maximum_value
Type	decimal
Sample

Fourth Maximum DateTime

No description available for this field.

Name (identifier)	fourth_maximum_datetime
Type	datetime
Sample

50th Percentile

No description available for this field.

Name (identifier)	50th_perecentile
Type	decimal
Sample

75th Percentile

No description available for this field.

Name (identifier)	75th_perecentile
Type	decimal
Sample

90th Percentile

No description available for this field.

Name (identifier)	90th_perecentile
Type	decimal
Sample

95th Percentile

No description available for this field.

Name (identifier)	95th_perecentile
Type	decimal
Sample

98th Percentile

No description available for this field.

Name (identifier)	98th_perecentile
Type	decimal
Sample

99th Percentile

No description available for this field.

Name (identifier)	99th_perecentile
Type	decimal
Sample

Method Count

No description available for this field.

Name (identifier)	method_count
Type	integer
Sample

Tribe Name

Name of Tribal Area Station is Within

No description available for this field.

Name (identifier)	tribe_name
Type	text
Sample

State Name

State Name

No description available for this field.

Name (identifier)	state_name
Type	text
Sample

County Name

Wake County

No description available for this field.

Name (identifier)	county_name
Type	text
Sample

City Name

City Name

No description available for this field.

Name (identifier)	city_name
Type	text
Sample

Local Site Name

Local Site Name

No description available for this field.

Name (identifier)	local_site_name
Type	text
Sample

Address

Street Address of Site

No description available for this field.

Name (identifier)	address
Type	text
Sample

Metropolitan Statistical Area or Core-Based Statistical Area Name

Metropolitan Statistical Area or Core-Based Statistical Area Name

No description available for this field.

Name (identifier)	msa_or_cbsa_name
Type	text
Sample

Data Source

Please visit https://aqs.epa.gov/aqsweb/documents/data_mart_welcome.html for more information on AQS Data Mart

No description available for this field.

Name (identifier)	data_source
Type	text
Sample

Monitoring Site (Latitude, Longitude)

Latitude Longitude Coordinates in WGS84 Format

No description available for this field.

Name (identifier)	monitoring_site_latitude_longitude
Type	geo point
Sample

JSON Schema

The following JSON object is a standardized description of your dataset's schema. More about JSON schema.

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    "description":"An example of an exceptional event would be a wildfire; it is something that affects air quality, but the local agency has no control over. No Events means no events occurred. Events Included means events occurred and the data from them is included in the summary. Events Excluded means that events occurred but data form them is excluded from the summary. Concurred Events Excluded means that events occurred but only EPA concurred exclusions are removed from the summary. If an event occurred for the parameter in question, the data will have multiple records for each monitor."
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    "description":"The percent representing the number of observations taken with respect to the number scheduled to be taken during the year. This is only calculated for monitors where measurements are required (e.g., only certain parameters)."
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    "title":"Exceptional Data Count",
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    "title":"Certification Indicator",
    "description":"An indication whether the completeness and accuracy of the information on the annual summary record has been certified by the submitter. Certified means the submitter has certified the data (due May 01 the year after collection). Certification not required means that the parameter does not require certification or the deadline has not yet passed. Uncertified (past due) means that certification is required but is overdue. Requested but not yet concurred means the submitter has completed the process, but EPA has not yet acted to certify the data. Requested but denied means the submitter has completed the process, but EPA has denied the request for cause. Was certified but data changed means the data was certified but data was replaced and the process has not been repeated."
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    }
    ,
    "third_maximum_value":
    {
    "type":"number",
    "title":"Third Maximum Value",
    "description":""
    }
    ,
    "third_maximum_datetime":
    {
    "type":"string",
    "format":"date-time",
    "title":"Third Maximum DateTime",
    "description":""
    }
    ,
    "fourth_maximum_value":
    {
    "type":"number",
    "title":"Fourth Maximum Value",
    "description":""
    }
    ,
    "fourth_maximum_datetime":
    {
    "type":"string",
    "format":"date-time",
    "title":"Fourth Maximum DateTime",
    "description":""
    }
    ,
    "50th_perecentile":
    {
    "type":"number",
    "title":"50th Percentile",
    "description":""
    }
    ,
    "75th_perecentile":
    {
    "type":"number",
    "title":"75th Percentile",
    "description":""
    }
    ,
    "90th_perecentile":
    {
    "type":"number",
    "title":"90th Percentile",
    "description":""
    }
    ,
    "95th_perecentile":
    {
    "type":"number",
    "title":"95th Percentile",
    "description":""
    }
    ,
    "98th_perecentile":
    {
    "type":"number",
    "title":"98th Percentile",
    "description":""
    }
    ,
    "99th_perecentile":
    {
    "type":"number",
    "title":"99th Percentile",
    "description":""
    }
    ,
    "method_count":
    {
    "type":"integer",
    "title":"Method Count",
    "description":""
    }
    ,
    "tribe_name":
    {
    "type":"string",
    "title":"Tribe Name",
    "description":"Name of Tribal Area Station is Within"
    }
    ,
    "state_name":
    {
    "type":"string",
    "title":"State Name",
    "description":"State Name"
    }
    ,
    "county_name":
    {
    "type":"string",
    "title":"County Name",
    "description":"Wake County"
    }
    ,
    "city_name":
    {
    "type":"string",
    "title":"City Name",
    "description":"City Name"
    }
    ,
    "local_site_name":
    {
    "type":"string",
    "title":"Local Site Name",
    "description":"Local Site Name"
    }
    ,
    "address":
    {
    "type":"string",
    "title":"Address",
    "description":"Street Address of Site"
    }
    ,
    "msa_or_cbsa_name":
    {
    "type":"string",
    "title":"Metropolitan Statistical Area or Core-Based Statistical Area Name",
    "description":"Metropolitan Statistical Area or Core-Based Statistical Area Name"
    }
    ,
    "data_source":
    {
    "type":"string",
    "title":"Data Source",
    "description":"Please visit https://aqs.epa.gov/aqsweb/documents/data_mart_welcome.html for more information on AQS Data Mart"
    }
    ,
    "monitoring_site_latitude_longitude":
    {
    "type":"array",
    "minItems":2,
    "maxItems":2,
    "items":
    {
    "type":"number"
    }
    ,
    "title":"Monitoring Site (Latitude, Longitude)",
    "description":"Latitude Longitude Coordinates in WGS84 Format"
    }
    }
    }
    }
  }
}

}

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