Nonattainment Area - Particulate Matter - 10 (1987 Standard)

The Nonattainment Area - Particulate Matter- 10 (1987) dataset was updated on May 31, 2026 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 areas identified in the U.S. where annual particulate matter (PM10) levels have not met the National Ambient Air Quality Standards (NAAQS) established in 1987 for particulate matter (PM10) and have been designated "nonattainment areas (NAA)". 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-pm-10-1987-area-information. A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529065未达标区域——1987年版颗粒物（PM10）数据集由美国环境保护署（Environmental Protection Agency, EPA）于2026年5月31日更新，隶属于美国运输部（U.S. Department of Transportation, USDOT）/美国运输统计局（Bureau of Transportation Statistics, BTS）的国家交通地图集数据库（National Transportation Atlas Database, NTAD）。本数据集详细提供了美国境内年度颗粒物（PM10）浓度未达到1987年制定的国家环境空气质量标准（National Ambient Air Quality Standards, NAAQS），并被划定为未达标区域（nonattainment areas, NAA）的相关区域信息。此类数据源自美国环境保护署空气质量规划与标准办公室（OAQPS）内部数据库，按周更新，但这并不意味着数据内容发生了变动。如需了解该未达标区域的更多信息，请访问以下网址：https://www.epa.gov/green-book/green-book-pm-10-1987-area-information。数据字典或其他属性信息可通过如下链接获取：https://doi.org/10.21949/1529065