Air Quality Data and Dispersion Modeling
Unless otherwise noted, all documents listed below are in pdf or
Background Concentrations for Modeling Purposes (12/27/2012)
Pre-processed, NWS Meteorological Data Sets, 2002-06 For use in AERMOD in SC
Pre-processed, NWS Meteorological Data Sets, 2002-06
For use in AERMOD in SC
The state has been divided into 12 areas such that the meteorological station/data
assigned to each area is deemed by DHEC's Bureau of Air Quality (BAQ) to be the
most representative, in general, for AERMOD modeling purposes for that area and
should be used as the default data for a given area. [Note: these area-station associations
supersede those in Table 5.1 (page 36) in "Air Quality Modeling Guidelines" of July
2001.] Please contact BAQ with any questions/issues or unusual circumstances. For
PSD permit modeling, choice of meteorological data should be discussed with BAQ
prior to modeling.
IMPORTANT NOTE (27-Dec-2012)
- AERMOD version 12345 was released by EPA on 17-Dec-2012 and should be used for all refined permit modeling performed after that date.
- This version of AERMOD requires meteorological input files that have been processed with AERMET version 12345 (or 11059, but 12345 is preferred).
- The meteorological data sets posted on this website were processed with AERMET version 06341 and therefore would be incompatible with AERMOD version 12345.
- To allow these meteorological data sets to be used with this latest AERMOD version, DHEC altered the header line inside each ".SFC"
file (the ".PFL" files do not have a header line) by replacing “Version: 06341” with “Version: 12345”. No other changes were made
to the files, except they (".SFC", ".PFL" and ".zip" files) were renamed by appending “_rev” to the filenames to distinguish them
from the previous unaltered sets.
- This is a temporary, interim measure to facilitate non-Prevention of Significant Deterioration (non-PSD) permit modeling using AERMOD
version 12345 until DHEC can fully update the meteorological data sets at a later date. Applicants performing modeling for a PSD permit
should contact John Glass (803-898-4074) to discuss the AERMET files that should be used for that modeling.
5-Year Concatenated AERMET Data (special case AERMOD modeling only)
1 – north of 33.74°N
3 – north of 34.6°N
5 – north of 33.8°N
2 – south of 33.74°N
4 – south of 34.6°N
6 – south of 33.8°N
The meteorological (AERMET) data provided by BAQ is solely intended to be used for
regulatory AERMOD modeling analyses for sources located in South Carolina ONLY.
Please be mindful that these data sets are subject to change based on pending comments
and guidance from EPA. Please contact BAQ modeling section manager at (803) 898-4074
should you have any questions about the use of these data sets.
Digital Terrain Data: National Elevation Dataset (NED) for use with AERMOD
Note: DHEC requires the use of NED [vs. Digital Elevation Model (DEM)]
starting February 1, 2010
This NED data covering South Carolina was obtained from the
United States Geological Survey (USGS). They are made
available here for use with regulatory AERMOD modeling analyses for sources located in South Carolina. The
data is in county divisions at 1 arc-second (approximately 30-meter) horizontal resolution in GeoTIFF format.
Please note that these data sources may occasionally be updated by USGS. The NED data sources on this
webpage were last updated on May 13, 2013. If you have questions about these data sources, please contact
the BAQ modeling section manager at (803) 898-4074.
Ambient Air Quality Data Summaries