Daily Census Tract-Level PM2.5 Concentrations, 2016 - 2020

This dataset provides modeled predictions of PM2.5 levels from the EPA's Downscaler model. Data are at the census tract level for 2016-2020. These data are used by the CDC's National Environmental Public Health Tracking Network to generate air quality measures. Census tract-level datasets contain estimates of the mean predicted concentration and associated standard error. Please refer to the metadata attachment for more information. Learn more about outdoor air quality on the Tracking Network's website: https://ephtracking.cdc.gov/showAirLanding.action. By using these data, you signify your agreement to comply with the following requirements: 1. Use the data for statistical reporting and analysis only. 2. Do not attempt to learn the identity of any person included in the data and do not combine these data with other data for the purpose of matching records to identify individuals. 3. Do not disclose of or make use of the identity of any person or establishment discovered inadvertently and report the discovery to: [e-mail]. 4. Do not imply or state, either in written or oral form, that interpretations based on the data are those of the original data sources and CDC unless the data user and data source are formally collaborating. 5. Acknowledge, in all reports or presentations based on these data, the original source of the data and CDC. 6. Suggested citation: Centers for Disease Control and Prevention. National Environmental Public Health Tracking Network. Web. Accessed: insert date. www.cdc.gov/ephtracking.

本数据集提供了美国环境保护署（EPA）Downscaler模型的PM2.5浓度模拟预测数据。数据涵盖了2016年至2020年的普查区级别。这些数据被美国疾病控制与预防中心（CDC）的国家环境公共卫生跟踪网络用于生成空气质量指标。普查区级别的数据集包含了平均预测浓度及其相关标准误差的估算。有关更多信息，请参阅附带的元数据。欲了解有关室外空气质量的更多信息，请访问跟踪网络网站：https://ephtracking.cdc.gov/showAirLanding.action。使用这些数据表明您同意遵守以下要求：1. 仅将数据用于统计报告和分析。2. 不得尝试识别数据中包含的任何个人身份，并且不得将本数据与其他数据合并以匹配记录以识别个人。3. 如不慎发现任何个人或机构的身份，不得泄露或使用该身份信息，并请向[e-mail]报告。4. 不得以书面或口头形式暗示或声明基于数据的解释是原始数据来源和CDC的观点，除非数据用户和数据来源正式合作。5. 在所有基于这些数据的报告或演示中，应承认数据的原始来源和CDC。6. 建议引用格式：疾病预防控制中心。国家环境公共卫生跟踪网络。网络版。访问日期：请插入日期。www.cdc.gov/ephtracking。