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Open/Close section Identification Information
Title: Nitrogen Dioxide Monitoring Site Design Values Table, Region 9, 2012, US EPA Region 9
Abstract: This table contains NO2 design values. A design value is a statistic that describes the air quality status of a given location relative to the level of the National Ambient Air Quality Standards (NAAQS). Design values are defined to be consistent with the individual NAAQS as described in CFR Part 50. They are typically used to designate and classify nonattainment areas, as well as to assess progress towards meeting the NAAQS. To view a list of areas designated nonattainment, see EPA's Green Book site. Design values are computed and published annually by EPA's Office of Air Quality Planning and Standards and reviewed in conjunction with the EPA Regional Offices. Some of these design values can change after the date of publication for a variety of reasons, including but not limited to: 1) EPA agreement that certain data were influenced by exceptional events and therefore not subject for comparison with the NAAQS, 2) States retroactively entering or changing erroneous data based on later findings, and/or 3) notification of a monitoring issue (e.g. network design, site combination, change in the regulatory status of a monitor) that would prompt a revision.
Purpose: A design value is a statistic that describes the air quality status of a given location relative to the level of the National Ambient Air Quality Standards (NAAQS). Design values are defined to be consistent with the individual NAAQS as described in CFR Part 50. They are typically used to designate and classify nonattainment areas, as well as to assess progress towards meeting the NAAQS. To view a list of areas designated nonattainment, see EPA's Green Book site. Design values are computed and published annually by EPA's Office of Air Quality Planning and Standards and reviewed in conjunction with the EPA Regional Offices. Some of these design values can change after the date of publication for a variety of reasons, including but not limited to: 1) EPA agreement that certain data were influenced by exceptional events and therefore not subject for comparison with the NAAQS, 2) States retroactively entering or changing erroneous data based on later findings, and/or 3) notification of a monitoring issue (e.g. network design, site combination, change in the regulatory status of a monitor) that would prompt a revision.
Open/Close section Distribution Information
Resource(Server) URL: http://www.epa.gov/airtrends/pdfs/NO2_DesignValues_20102012_FINAL_10_22_2013.xlsx
Download URL: http://www.epa.gov/airtrends/values.html
Open/Close section Time Period of Content
Publication Date: 20131212
Progress: Completed
Frequency: annually
Open/Close section Single Date
Date: October 22, 2013
Currentness: Publication date
Open/Close section Spatial Domain
West Bounding Longitude: -138.21454852
East Bounding Longitude: -66.68151645
North Bounding Latitude: 61.7110157
South Bounding Latitude: 6.65223303
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Open/Close section Constraints
License https://edg.epa.gov/EPA_Data_License.html
Access: None.
Use: None. Please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of the EPA would be appreciated.
Open/Close section Theme Keywords
Theme Topics: Air, Environment, Exposure, Health, Monitoring, Regulatory
Open/Close section Contact Information
Originator: US Environmental Protection Agency
Email: henley.cheryl@epa.gov
Address Type: mailing and physical address
City: San Francisco
State: CA
Postal Code: 94105
Telephone: 415-972-3586
Open/Close section Metadata Reference Information
File Identifier: {38CB0E82-B9DD-4E25-8094-33DB39822582}
Metadata Date Stamp: 2013-12-12
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
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