3SAQS/WAQS Monitoring Network Assessments
This Wiki page contains materials for Monitoring Network Assessments conducted by the 3SAQS and WAQS. The 2014 3SAQS Assessment evaluated the status of ambient air quality monitoring in Colorado, Wyoming and Utah. The 2017 WAQS study expanded the geographical region of the Three State Study to seven states by adding New Mexico, Montana, North Dakota and South Dakota. Final reports, supplemental materials, and meeting archives for the 3SAQS and WAQS Assessments are available below.
3SAQS Network Recommendations (27 Feb., 2014)
Cost Survey WAQS Monitoring Network Assessment Final Report (3 Nov., 2017) WAQS Monitoring Network Assessment Working Group Meetings
WAQS Governing Board 2017.05.05.pptx (5 May, 2017)
WAQS OC 2017.11.06.pptx (6 Nov., 2017)
Monitors An Excel Workbook that lists monitors in the WAQS region. The Workbook has a worksheet for all monitors in the WAQS region, and separate worksheets listing monitors by organization. Information in the workbook was obtained from the AQS Monitor Listing 1 and the IWDW 2.
Note: The map image files can be viewed at full resolution in most web browsers by clicking on, and hence zooming to, a specific region of the map.
Maps by Parameter Maps showing monitors for the parameters (pollutants) considered in the WAQS MNA.
All monitors non-overlapping labels
All monitors labels at monitor locations. Some lables are obscured.
O3 and Precursors O3, NO2 and VOCs (ethane and formaldehyde shown in red, or red cross hatching)
PM2.5 FRM/FEM and non-FRM/FEM PM2.5 monitors
PM2.5 with supplemental monitoring monitors reporting PM2.5 Raw and PM2.5 Total
Ions and Ammonia PM2.5 sulfate and nitrate ions and NH3
Meteorology wind speed and temperature
NADP sites AMoN and NTN
Maps by Organization Maps showing monitors affiliated with state agencies and/or organizations considered in the WAQS MNA process.
New Mexico-ED, Albuquerque DEQ
Other Monitors not associated with groups listed above. Generally industry sponsored monitoring.
2010 2011 2012 2013 2014 2015
Design Values County level design values (DVs) from the EPA OEI Map Service4.
2014-2016 County Level DVs overlaid with O3 monitor locations.
O3 MD8 detail Counties with monitor(s) reporting > 70ppb
PM2.5 24-hour w/ CIAs Overlaid with Class I areas
PM2.5 24-hour NAAs WAQS Region
PM2.5 24-hour NAAs detail Wasatch Front, overlaid with monitor locations
Excel spreadsheet with summary data from the monitor-to-monitor correlation analysis.
Scatter and time series plots for the monitor-to-monitor analysis.
Archive O3 MD8s and daily average O3, NO2 and PM2.5
Correlograms of the monitor-to-monitor correlation coefficient (R) vs distance between monitor pairs are used to estimate monitor spatial extents.
Archive Correlograms for daily average O3, NO2 and PM2.5
WAQS Air Basins 61 air basins defined in the WAQS MNA
Monitor Representative Area Representative areas are the monitor spatial extents clipped by air basin boundaries. Note that representative areas for PM2.5 FRM/FEM and PM2.5 non-FRM/FEM monitors were determined separately, although the results are combined on the maps in this section.
Gap Analysis Maps of active monitor location overlaid with active O&G wells. Other spatial layers are included for context. This analysis informed the WAQS MNA recommendations by highlighting underserved areas in the current monitoring network.
O&G Wells and Leases locations of active O&G wells and BLM O&G leases with O3 and PM2.5 monitors (O&G well data updated 11/16/2017, lease sale tracts from BLM6)
Emissions are from the WAQS 2011b modeling platform and incorporate WAQS 2011b_v2 O&G sector emissions
NDDEQ 2017 Network Plan
MTDEQ 2016 Network Plan
Colorado - COGCC GIS downloads see Well Surface Location Data
Layers: Wells.shp, Permist.shp, Permits_pending.shp; Filters: Facil_stat = Producing; Downloaded 2017-4-11
Montana & Dakotas - USGS Energy Developmet - GIS Data
Layer: PetroleumWells_041113; Filters: Producing (MD, ND, SD), not DRY (ND); Published: 2013-11-19; Downloaded 2016-10-24
New Mexico - NMOCD ftp://188.8.131.52/Public/OCD
Layer: NM_Wells_State_Wide_UTM_NAD_83_Z13; Filters: Status=Active, Well Type = Gas, Oil, Injection, Gas Storage; Downloaded 2016-10-25
Utah - DOGM GIS Data ftp
Layers: DNROilGasWells; Filters: Status = Producing, Active, Well Type = Oil well, Gas well, Gas injection, Gas storage; Downloaded 2017-4-11
Wyoming - WDEQ (Cara Keslar, personal communication)
Layers: wogcc_wells; Filters: WellStatus = Permit to Drill, Producing Gas Well, Producing Oil Well; Received 2017-4-7
2017 WAQS MNA GIS Data
Arc GIS mdx files, scripts and geodatabases used for the 2017 WAQS MNA
1. EPA 2017a, AQS Pre-generated data files, 2017-05-26 update, https://aqsdr1.epa.gov/aqsweb/aqstmp/airdata/download_files.html,
2. IWDW 2017. Intermountain West Data Warehouse, http://views.cira.colostate.edu/tsdw/DataWizard/Default.aspx.
3. EPA 2017a, 2016-12-23 update.
4. EPA 2017b, Map Service: USEPA Office of Environmental Information (OEI). Data: U.S. EPA Office of Air and Radiation (OAR) - Office of Air Quality, https://gispub.epa.gov/arcgis/rest/services/OAR_OAQPS/DesignValueServicesOAQPS/MapServer, downloaded on Oct. 11, 2017.
5. Highly correlated monitors are defined being correlated with another monitor with a regression coefficient (R2) >0.8 and average concentration within 10%. The average concentration criteria was set to 15% for NO2. Regressions use all available matching (that is, days where both monitor report data) 24-hour average data.
6. BLM 2017, ePlanning Project Search, https://eplanning.blm.gov/epl-front-office/eplanning, Oil & Gas Lease Sales, e.g. June 2018 Oil and Gas Lease Sale, https://eplanning.blm.gov/epl-front-office/eplanning/planAndProjectSite.do?methodName=dispatchToPatternPage¤tPageId=132451