Memo to:	EPA Docket (EPA-HQ-OAR-2017-0548)
From:		Denise Scott OAR/OAQPS/AQPD/GSG
Subject:		EPA Datasets Used for 2015 Ozone NAAQS Designations
This is an update to the previous memo documenting the datasets used to prepare the technical support documents (TSDs) for the 2015 ozone NAAQS designations. The documents previously identified can be accessed from EPA's ozone designations website found at:
https://www.epa.gov/ozone-designations/ozone-designations-guidance-and-data.
Dataset
Link Address
Date Made Available
2016 and Early-Certified 2017 Ozone Design Values used in Final Designations
https://www.epa.gov/sites/production/files/2018-05/ozone_dv_tables_final_04-30-18.xlsx
April 30, 2018
2014 v1 NEI Emissions Summaries without Biogenics (excel spreadsheet)
https://www.epa.gov/sites/production/files/2017-12/2014_v1_nei_emissions_summaries_no_biogenics_20170404_0.xlsx
December 21, 2017
2014 Vehicle Miles Traveled (excel spreadsheet)
https://www.epa.gov/sites/production/files/2016-04/ozone-vmt-2011.xlsx
February 9, 2017
County Population (excel spreadsheet)
https://www.epa.gov/sites/production/files/2016-04/ozone-county-population.xlsx
July 14, 2016

Version 2 of the 2014 National Emissions Inventory was released in February 2018 and may have been used to prepare some technical support documents (TSDs) for the 2015 ozone NAAQS designations. The table below includes a link to EPA's air emissions inventory website where the inventory can be accessed.
Dataset
Link Address
Date Made Available
2014 v2 NEI Emissions Summaries 
https://www.epa.gov/air-emissions-inventories/2014-national-emissions-inventory-nei-data
February 2018

