Nonattainment Area - Nitrogen Dioxide (NO2 - 1971 Standard)

The Nonattainment Area - Nitrogen Dioxide (NO2-1971) dataset was updated on June 30, 2025 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). This dataset provides detailed information about the nonattainment area for the Nitrogen Dioxide (1971) National Ambient Air Quality Standards (NAAQS). On September 22, 1998 the only Nitrogen Dioxide (1971) nonattainment area was redesignated to maintenance. These data are weekly from an OAQPS internal database. However, that does not necessarily mean the data have changed. For more information about this non-attainment area, please see the website https://www.epa.gov/green-book/green-book-nitrogen-dioxide-1971-area-information. A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529064

Data and Resources

Field Value
access_constraints ["Access Constraints: unrestricted"]
bbox-east-long -116.518310969222
bbox-north-lat 34.818133491
bbox-south-lat 32.803119109677
bbox-west-long -118.944862498
contact-email Cakir.Halil@epa.gov
coupled-resource []
dataset-reference-date [{"type": "creation", "value": "2004-07-01"}]
frequency-of-update weekly
guid Nonattainment Area - Nitrogen Dioxide (NO2 - 1971 Standard)
licence ["This NTAD dataset is a work of the United States government as defined in 17 U.S.C. \u00c2\u00a7 101 and as such are not protected by any U.S. copyrights.\u00c2\u00a0This work is available for unrestricted public use."]
metadata-date 2025-07-24
metadata-language eng; USA
metadata_type geospatial
old-spatial {"type": "Polygon", "coordinates": [[[-118.944862498, 32.803119109677], [-116.518310969222, 32.803119109677], [-116.518310969222, 34.818133491], [-118.944862498, 34.818133491], [-118.944862498, 32.803119109677]]]}
progress onGoing
resource-type dataset
responsible-party [{"name": "Environmental Protection Agency (EPA)", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-118.944862498, 32.803119109677], [-116.518310969222, 32.803119109677], [-116.518310969222, 34.818133491], [-118.944862498, 34.818133491], [-118.944862498, 32.803119109677]]]}
spatial_harvester true
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • 1971
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • air
  • air quality
  • area
  • atlas
  • attainment
  • boundary
  • criteria pollutants
  • database
  • designations
  • dioxide
  • environment
  • environmental
  • epa
  • naa
  • naaqs
  • national
  • national transportation atlas database
  • nitrogen
  • nitrogen dioxide
  • non
  • nonattainment
  • ntad
  • oar-oaqps
  • planning
  • pollutant
  • pollutants
  • polygon
  • standards
  • transportation
  • usa
  • vector
isopen False
metadata_created 2025-09-25T00:08:46.666156
metadata_modified 2025-09-25T00:08:46.666163
notes The Nonattainment Area - Nitrogen Dioxide (NO2-1971) dataset was updated on June 30, 2025 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). This dataset provides detailed information about the nonattainment area for the Nitrogen Dioxide (1971) National Ambient Air Quality Standards (NAAQS). On September 22, 1998 the only Nitrogen Dioxide (1971) nonattainment area was redesignated to maintenance. These data are weekly from an OAQPS internal database. However, that does not necessarily mean the data have changed. For more information about this non-attainment area, please see the website https://www.epa.gov/green-book/green-book-nitrogen-dioxide-1971-area-information. A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529064
num_resources 2
num_tags 40
title Nonattainment Area - Nitrogen Dioxide (NO2 - 1971 Standard)