These have one record per day per CBSA or county. There are also daily summary files that show the AQI by CBSA or county. This file has one record per year per CBSA or county. Statistics for AQI (max, number of values in each category, etc.). Summary AQI files that show by CBSA (metro area) or county the annual
Respective records in those Daily Summary files. Gases and PM10 and PM2.5 (FRM and non FRM). The Air Quality Index (AQI) values are presented in several files.ĪQI is calculated each day for each monitor for the Criteria
Of parameters included in either catagory by visiting theĪQS Code Tables page for Parameter Classes and searching for CORE_HAPS or VOC. The EPA AQS system as "CORE HAPS" or "VOC". These lists include the parameters as defined in The VOC list was expanded with the December 2015 Of parameters: Core HAPS (Hazardous Air Pollutants) and VOCs ( Volatile EPA has several ways of grouping parameters.įor the parameters listed here as toxics we have included two groups The toxics data is included on this page for those needed it in a consistentĢ. It is a value added product that includes additional data quality assurance and reduction. While this page contains information on toxics, it is suggested you get The files are all comma separated text with a header. Mind, data collection agencies have up to 6 months to report their data. Twice per year in the spring and fall (late May and November). The size of the (zipped) file, the number of data rows in the file,Īnd the date the file was last modified. The annual summary files are small enough to include all data in one file.Įach group has data listed by year, in reverse order, back to 1990.Įach table entry has the file name, linked to the file,
The data available here is also available via Understand the EPA ambient air quality monitoring program and data. This page contains large files of data intended for use by people who The files are updated twice per year: once in June to capture the complete data for the prior year and once in December to capture the data for the summer (ozone season). This page contains pre-generated files of data available for download.