The Division of Air Quality has the primary responsibility for protecting the health and welfare of North Dakotans from the harmful effects of air pollution.
Questions may be addressed to Ryan Mills at 701-328-5254, or email rmills@nd.gov .
Air Quality Index (AQI animated) from EPA AIRNow
VIDEO
Department of Environmental Quality
The Air Quality Monitoring branch ensures that the ambient (outside) air quality in North Dakota is better than the levels required by the state per Chapter 33.1-15-02 and by the National Ambient Air Quality Standards
National Park Service
As part of their national monitoring network, the National Park Service has installed an ambient monitoring site at Theodore Roosevelt National Park - South Unit. The Department operates various monitoring equipment at this site on their behalf.
Industry
In addition to the ambient air quality monitoring sites operated by the Department, the owners of certain industrial sources of air emissions also operate air quality monitoring sites within their immediate spheres of influence. The site locations selected are based on computer dispersion modeling and prevailing wind directions.
North Dakota Ambient Air Quality Monitoring Sites (white labels, above).
For more information on each monitoring station, open the following sections:
Bismarck Residential Air Monitoring Station
(Click to enlarge)
Monitored Parameters
Sulfur Dioxide (SO2)
Nitrogen Dioxide (NO2)
Ozone (O3)
Carbon Monoxide (CO)
Particulate Matter (PM10 & PM2.5)
Particulate Matter Speciation
Total Reactive Nitrogen (NOy)
Fargo Northwest Air Monitoring Station
(Click to enlarge)
Monitored Parameters
Sulfur Dioxide (SO2)
Nitrogen Dioxide (NO2)
Ozone (O3)
Particulate Matter (PM10 & PM2.5)
TRNP - South Unit (Painted Canyon) Air Monitoring Station
(Click to enlarge)
Monitored Parameters
Sulfur Dioxide (SO2)
Ozone (O3)
Particulate Matter (PM2.5)
Theodore Roosevelt National Park - North Unit Air Monitoring Station
(Click to enlarge)
Monitored Parameters
Sulfur Dioxide (SO2)
Nitrogen Dioxide (NO2)
Ozone (O3)
Particulate Matter (PM10 & PM2.5)
Hannover Air Monitoring Station
(Click to enlarge)
Monitored Parameters
Sulfur Dioxide (SO2)
Nitrogen Dioxide (NO2)
Ozone (O3)
Particulate Matter (PM10 & PM2.5)
Lake Ilo Air Monitoring Station
(Click to enlarge)
Monitored Parameters
Sulfur Dioxide (SO2)
Nitrogen Dioxide (NO2)
Ozone (O3)
Particulate Matter (PM10 & PM2.5)
Beulah North Air Monitoring Station
(Click to enlarge)
Monitored Parameters
Sulfur Dioxide (SO2)
Nitrogen Dioxide (NO2)
Ozone (O3)
Particulate Matter (PM10 & PM2.5)
Ammonia (NH3)
Ryder Air Monitoring Station
(Click to enlarge)
Monitored Parameters
Sulfur Dioxide (SO2)
Nitrogen Dioxide (NO2)
Ozone (O3)
Particulate Matter (PM10 & PM2.5)
Lostwood National Wildlife Refuge Air Monitoring Station
(Click to enlarge)
Monitored Parameters
Sulfur Dioxide (SO2)
Nitrogen Dioxide (NO2)
Ozone (O3)
Particulate Matter (PM10 & PM2.5)
Ammonia (NH3)
List of Sites and Pollutants Monitored
Site
Site No.
MET
SO2
NO2
O3
CO
PM10
PM2.5
Other(s)
Bismarck Residential
38-015-0003
✓
✓
✓
✓
✓
✓
✓
Total Reactive Nitrogen (NOy )
Beulah North
38-057-0004
✓
✓
✓
✓
✓
✓
Ammonia (NH3 )
Fargo West
38-017-1004
✓
✓
✓
✓
✓
✓
Hannover
38-065-0002
✓
✓
✓
✓
✓
✓
Lake Ilo
38-025-0004
✓
✓
✓
✓
✓
✓
Lostwood NWR
38-013-0004
✓
✓
✓
✓
✓
✓
Ammonia (NH3 )
Ryder
38-101-0003
✓
✓
✓
✓
✓
✓
Theodore Roosevelt NP North Unit
38-053-0002
✓
✓
✓
✓
✓
✓
Theodore Roosevelt NP South Unit
38-007-0002
✓
✓
✓
✓
AAQS
Pollutant
Averaging Period
North Dakota 3
North Dakota
Federal 3
Federal
PM10
24-HR
150 e
150 e
PM2.5
24-HR
35 b
35 b
PM2.5
Annual
9 g
9 g
SO2
1-HR
196 j
75 j
196 j
75 j
SO2
3-HR
1,309 a
500 a
1,309 a
500 a
SO2
24-HR k
365 a
140 a
SO2
Annual k
80
30
NO2
1-HR
188 i
100 i
188 i
100 i
NO2
Annual
100
53
100
53
CO
1-HR
40,000 a
35,000 a
40,000 a
35,000 a
CO
8-HR
10,000 a
9,000 a
10,000 a
9,000 a
O3
8-HR
137 c
70 c
137 c
70 c
Lead (Pb)
3-Months
0.15 h
0.15 h
H2 S
Instantaneous
14,000
10,000
H2 S
1-HR
280 d
200 d
H2 S
24-HR
140 a
100 a
H2 S
Quarter
28
20
a Not to be exceeded more than once per year. b Three year average of the annual 98th percentile values. c Three year average of the annual fourth-highest daily maximum 8-HR concentration.d Not to be exceeded more than once per month., e Not to be exceeded more than once on average over a three year period. f Average of annual concentrations for three calendar years.g Three year average of annual concentrations.h Three month arithmetic mean within a three year period.i Three year average of the annual 98th percentile (8th highest) of the daily maximum 1-HR average concentration in a year.j Three year average of the annual 99th percentile (4th highest) of the daily maximum 1-HR averages.k Note that in NDAC 33.1-15-02-04 Table 1 (effective July 2020), the annual and 24-hour SO2 standards have been removed. These standards were removed from the NAAQS effective August 23, 2010 (see Fed Reg. Vol. 75, No. 119, 35520, Tuesday, June 22, 2010).
Note that values are corrected to a reference temperature of twenty-five degrees Celsius (25°C/298 K) and a reference pressure of seven hundred sixty millimeters of mercury (760 mmHg/101.3 kilo-pascals).
Each year, the Department compiles a report summarizing the ambient air quality data obtained from the network of air quality monitoring sites in the state during the previous year. The reports include sulfur dioxide, nitrogen dioxide, ozone, ammonia, hydrogen sulfide, and particulate matter ambient air quality data. Online versions of each report from 1995 to present are available by selecting the desired year in the drop-down menu, below. A printed or electronic copy of a given report may be requested by contacting the Department at 701-328-5188.
For a number of years, in addition to the annual report, the Department also published quarterly reports. These have now been superseded by the ability to generate custom time period data summaries. These summaries can cover historical periods (including those covered by the quarterly reports) up until the present.
A custom summary can be requested by calling 701-328-5254 or emailing Ryan Mills (rmills@nd.gov ).
Note: The reports below were prepared specifically for two-sided printing in Portable Document Format (PDF). Therefore, blank pages will occur in single-sided printed version.
Adobe Acrobat Reader Information
Some PDF documents may require a PDF reader program in order to be viewed.
Adobe Acrobat Reader
is one free application for viewing PDF documents - however, there are others that you can use instead. This link does not represent an endorsement of any product or company by the Department.
Ambient Data can be accessed through EPA's Air Quality System (AQS) GIS Server
Ambient Monitoring Reports & Network Plans
Program Manager and Data Processing
Quality Assurance Manager
Last Updated: 01/21/2026
We are committed to ensuring our website complies with the Americans with Disabilities Act (ADA) and applicable web accessibility standards. We are actively working to improve the accessibility and usability of our online content. If you experience difficulty accessing any part of this website or require an accommodation, please contact us at DEQ@nd.gov.
