wildfire smoke trends and the air quality index · 2020. 10. 1. · 6. trends deq compiled the...
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Wildfire Smoke Trends and the Air Quality Index By: Anthony Barnack September 2020
This report prepared by:
Oregon Department of Environmental Quality
700 NE Multnomah Street, Suite 600
Portland, OR 97232
1-800-452-4011
www.oregon.gov/deq
Contact:
Anthony Barnack
503-693-5708
Laboratory and Environmental Assessment Division 7202 NE Evergreen Pkwy,
Suite 150
Hillsboro, OR 97006 Phone: 503-693-5708
800-452-4011
Contact: Anthony Barnack
www.oregon.gov/DEQ
DEQ is a leader in
restoring, maintaining and
enhancing the quality of
Oregon’s air, land and
water.
This report prepared by:
Oregon Department of Environmental Quality
700 NE Multnomah Street, Suite 600
Portland, OR 97232
1-800-452-4011
www.oregon.gov/deq
Contact:
Anthony Barnack
503-693-5708
DEQ can provide documents in an alternate format or in a language other than English upon request. Call DEQ at 800-
452-4011 or email [email protected].
i
Table of Contents
Glossary .......................................................................................................................................................... i Executive Summary ...................................................................................................................................... 1 1. Introduction ........................................................................................................................................... 1 2. Scope of This Report ............................................................................................................................. 2 3. Wildfire Smoke Impacts ........................................................................................................................ 2 4. Air Quality Index .................................................................................................................................. 2 5. Calculating AQI Trends ........................................................................................................................ 2 6. Trends .................................................................................................................................................... 3 7. Discussion ............................................................................................................................................. 6 8. Conclusion ........................................................................................................................................... 10
Figure 1. Acreage burned by Wildfire in areas impacting Oregon. .............................................................. 1 Figure 2. Map of wildfire health trends across Oregon. ................................................................................ 5 Figure 3. Bend ≥ USG AQI wildfire smoke trends. ...................................................................................... 8 Figure 4. Klamath Falls ≥ USG AQI wildfire smoke trends. ........................................................................ 8 Figure 5. Medford ≥ USG AQI wildfire smoke trends. ................................................................................ 9 Figure 6. Portland ≥ USG AQI wildfire smoke trends. ................................................................................. 9 Figure 7. Albany wildfire ≥ USG AQI wildfire smoke trends. ................................................................... 11 Figure 8. Baker City wildfire ≥ USG AQI wildfire smoke trends. ............................................................. 12 Figure 9. Burns/Hines wildfire ≥ USG AQI wildfire smoke trends. ........................................................... 12 Figure 10. Cave Junction wildfire ≥ USG AQI wildfire smoke trends. ...................................................... 13 Figure 11. Corvallis wildfire ≥ USG AQI wildfire smoke trends. .............................................................. 13 Figure 12. Cottage Grove wildfire ≥ USG AQI wildfire smoke trends. ..................................................... 14 Figure 13. Enterprise wildfire ≥ USG AQI wildfire smoke trends. ............................................................ 14 Figure 14. Eugene/Springfield wildfire ≥ USG AQI wildfire smoke trends. .............................................. 15 Figure 15. Grants Pass wildfire ≥ USG AQI wildfire smoke trends. .......................................................... 15 Figure 16. John Day wildfire ≥ USG AQI wildfire smoke trends. .............................................................. 16 Figure 17. Lakeview wildfire ≥ USG AQI wildfire smoke trends. ............................................................. 16 Figure 18. La Grande wildfire ≥ USG AQI wildfire smoke trends. ............................................................ 17 Figure 19. Oakridge wildfire ≥ USG AQI wildfire smoke trends. .............................................................. 17 Figure 20. Pendleton wildfire ≥ USG AQI wildfire smoke trends. ............................................................. 18 Figure 21. Prineville wildfire ≥ USG AQI wildfire smoke trends. ............................................................. 18 Figure 22. Roseburg wildfire ≥ USG AQI wildfire smoke trends............................................................... 19 Figure 23. Salem wildfire ≥ USG AQI wildfire smoke trends. ................................................................... 19 Figure 24. Sisters wildfire ≥ USG AQI wildfire smoke trends. .................................................................. 20 Figure 25. Sweet Home wildfire ≥ USG AQI wildfire smoke trends. ........................................................ 20 Figure 26. The Dalles wildfire ≥ USG AQI wildfire smoke trends. ........................................................... 21
Table 1. The PM2.5 Air Quality Index, breakpoints, and health effects. ...................................................... 3 Table 2. Number of USG or worse days from Wildfire Smoke Impacts. ..................................................... 7
Glossary AQI – Air Quality Index, EPA Air Quality health scale.
PM2.5 – Particulate matter 2.5 microns in diameter or smaller
PM10 - Particulate matter 10 microns in diameter or smaller
≥USG – Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous AQI
1
Executive Summary Large wildfires have been increasing across the western United States in the last decade and are expected
to become more frequent, according to the National Interagency Fire Center. Across Oregon, smoke from
fires is causing Air Quality Index values that are unhealthy for sensitive groups or worse, or ≥USG, for
short. For example, until 2015, Portland had not had a single day with air quality that was ≥USG from
wildfire smoke since air quality monitoring began in 1985. From 2015 to 2019, Portland had three out of
five years with wildfire smoke impacts causing air quality to be ≥USG. In 2018, Klamath Falls and
Medford had five weeks where air quality was ≥USG. This was the most days with wildfire smoke impact
since monitoring began in the 1980s. Bend had three weeks of air quality that was ≥USG in 2017 and one
week in 2018. Before 2017, Bend had not had over three days of ≥USG in any year. If these trends
continue, Oregon should expect to see an increase in ≥USG during a given summer and more summers with
impacts. In other words, summers with little or no wildfire smoke, like 2016 and 2019, will be much less
commonplace.
1. Introduction Oregon and surrounding states have temperate rainforests west of the Cascade Mountains and more arid
ponderosa pine forests east of the Cascades. Fire is a natural part of the ecology of these forests and
occasional burning is healthy for forests. However, fires in these forests have become more massive and
burn more acres, according to the National Interagency Fire Center. Figure 1 shows the increasing
wildfire trends over the last decade for areas in the western United States and Canada where smoke
impacts Oregon. The fire season is longer and fires are larger than in the past.
Data provided by the National Interagency Fire Center and Washington DOE
Figure 1. Acreage burned by wildfire in areas impacting the Pacific Northwest.
0
1
2
3
4
5
6
7
8
2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
Mil
lio
ns o
f acre
s b
urn
ed
Acres Burned by Wildfire by State and Province
Includes Oregon, Washington, Idaho, British Columbia, and California
2
2. Scope of This Report This report is limited to the presentation of the AQI health trends for PM2.5. The report can be used as a
reference for more in depth discussion of wildfire smoke causes and impacts.
3. Wildfire Smoke Impacts Oregon’s wildfire season used to start in late July and run into early September. More recently, there have
been fires starting in mid-July and lasting until early October. Fires impacting Oregon have been mainly
in the Southern, Central and Northeastern Oregon and Northern California mountains. Some recent
impacts have come from British Columbia and Central Washington.
Wildfire smoke emits a wide variety of pollutants measured as particulate matter (PM2.5 and PM10),
black carbon, nitrogen dioxide, carbon monoxide, volatile organic compounds, polycyclic aromatic
hydrocarbons and metals. According to the Oregon Health Authority’s publication, Wildfire Smoke and
Your Health, of these pollutants, PM2.5 may represent the greatest health concern since it can be inhaled
deeply into the lungs and a fraction may even reach the bloodstream. Volatile organic compounds can
cause early symptoms such as watery eyes, respiratory tract irritation and headaches. Higher levels of
ozone (smog) can also be formed from an increase in the precursor pollutants: nitrogen dioxide and
volatile organic compounds.
4. Air Quality Index PM2.5 is a criteria pollutant that is easily measured and has well established National Ambient Air
Quality Standards. The U.S. EPA created the color-coded Air Quality Index, or AQI, which is used to
convert pollutant concentrations into more useful health risk language. The AQI uses PM2.5, ozone,
PM10, nitrogen dioxide, carbon monoxide and sulfur dioxide data to calculate health indices. In Oregon,
PM2.5 and ozone measurements typically have the highest AQI and are considered the drivers of
associated health risks. In the summer, the ozone AQI in urban areas is usually higher than the PM2.5
unless there is wildfire smoke.
5. Calculating AQI Trends The AQI is useful for calculating wildfire trends because it includes health risk in its value. These AQI
trends are calculated using PM2.5 measurements because PM2.5 has the highest AQI levels of any of the
pollutants during wildfire smoke intrusions.
DEQ and the Lane Regional Air Protection Agency measure PM2.5 using Federal Reference Method
filter samplers. Air passes through a filter for 24 hours starting at midnight and samples are collected
daily or every three or six days depending on the location. The filter samplers are colocated with
nephelometers that measure continuous, real-time light scattering due to particulate matter. DEQ uses
linear regression to compare the light scattering from the nephelometer and the PM2.5 from the filter
samplers to get a correlation between the two methods. The correlation equation is used to convert the
nephelometer’s light scattering into a real-time PM2.5 estimate. The 24-hour PM2.5 average is used to
calculate the daily AQI presented in this report.
PM2.5 estimate calculations
To calculate the AQI, the PM2.5 filter data is used when available. When there is no filter data, the
nephelometer derived PM2.5 estimates are used. Most days and locations do not have filter data so the
PM2.5 estimates consist of over half of the values.
For this trend report, DEQ used the 2013 to 2015 PM2.5 Federal Reference Method/nephelometer
correlation equations to recalculate the nephelometer light scattering values. The PM2.5 estimates were
updated using a more recent correlation equation to eliminate variations from changing correlations over
3
the years. Note that correlation equations changed very little, but a small change can be significant if the
PM2.5 estimate is near an AQI break point.
AQI calculations
The AQI was also updated using the most recent AQI breakpoints. The AQI breakpoints changed when
EPA updated the PM2.5 standards. In order to compare apples to apples, all the data has to be
recalculated using the same AQI breakpoints. The most recent breakpoints are based on the most current
health information. The current EPA breakpoints are in Table 6 of the EPA’s Technical Assistance
Document for the Reporting of Daily Air Quality – the Air Quality Index (AQI), May 2016. The
AQI calculation is Equation 1 in the document. The AQI categories and breakpoints are shown in Table 1
below.
Table 1. The PM2.5 Air Quality Index, breakpoints, and health effects.
AQI
Category
and Color
AQI
value
PM2.5
(µg/m3)
24-hr Aver. Air Quality and Health
Good
0
to
50
0.0
to
12.0
Air quality is satisfactory. Air pollution poses little or no health
risk.
Moderate
51
to
100
12.1
to
35.4
Air quality is acceptable; however, there may be a moderate health
concern for a very small number of people. Respiratory symptoms
are possible in people unusually sensitive to air pollution. Heart or
lung disease (such as asthma) symptoms may be aggravated in
people with cardiopulmonary disease and older adults. These
groups should consider reducing prolonged or heavy outdoor
exertion.
Unhealthy
for
Sensitive
Groups
101
to
150
35.5
to
55.4
Members of sensitive groups may experience health effects.
People with heart or lung disease may experience increased
symptoms and premature mortality; older adults, pregnant women
and children, are also among the groups most at risk of respiratory
symptoms. These groups should reduce prolonged or heavy
outdoor exertion. The general public is not likely to be affected.
Unhealthy
151
to
200
55.5
to
150.4
Everyone may begin to experience health effects; members of
sensitive groups may experience more serious health effects.
These groups should avoid prolonged or heavy exertion: People
with heart or lung disease, children, pregnant women and older
adults. Everyone else should reduce prolonged or heavy exertion.
Very
Unhealthy
201
to
300
150.5 to
250.4
Health alert: everyone may experience more serious health effects.
These groups should avoid all physical activity outdoors: People
with heart or lung disease, children, pregnant women and older
adults. Everyone else should avoid prolonged or heavy exertion.
Hazardous >300 >250.5
Health warnings of emergency conditions. The entire population is
more likely to be affected. See EPA AIRNow “Extremely High
Levels of PM2.5: Steps to Reduce Your Exposure” when PM2.5
levels are “Hazardous” or above on the AQI.
6. Trends DEQ compiled the wildfire AQI trends for “Unhealthy for Sensitive Groups,” “Unhealthy,” “Very
Unhealthy” or “Hazardous.” Collectively these categories are known as unhealthy for sensitive groups or
worse, or ≥USG for short. In Oregon, wildfire smoke occurs during the summer, so for this report values
from June 1 to Sept. 30 were selected. July 4 was removed from the trends because of fireworks. DEQ
4
evaluated summertime AQI trends up to 2019 for 24 communities in Oregon. A map of wildfire related
AQI trends for various cities around the state is shown in Figure 2. The charts on the map show the ≥USG
for each city divided into blocks of five year totals. For example, the sum of ≥ USG from 1985 to 1989,
from 1990 to 1994, etc.
To simplify the discussion in this report, only four of the cities from across the state are provided in the
main body. They are Bend, Klamath Falls, Medford and Portland. The trends for the number of days
≥USG for these cities are provided in Figures 3 through 6 and in Table 2. The graphs for the remaining
cities are shown in the appendix.
5
Air Quality Division
Figure 2. Map of wildfire AQI trends across Oregon.
The charts’ vertical axis are the number of days per year that have an AQI of ≥USG (Unhealthy for Sensitive Groups or worse). ND = No data collected for
these years. The charts’ horizontal axis are the five year total of the <USG for each block. The increments are shown in the key on the graph.
‘85 90 95 00 05 10 15
‘85 90 95 00 05 10 15
‘85 90 95 00 05 10 15
‘85 90 95 00 05 10 15
‘85 90 95 00 05 10 15
‘85 90 95 00 05 10 15
‘85 90 95 00 05 10 15
‘85 90 95 00 05 10 15
ND
‘85 90 95 00 05 10 15
‘85 90 95 00 05 10 15
ND
ND
ND
ND
Roseburg
Medford
Eugene
Salem
Portland
The Dalles
Bend
Klamath Falls
La Grande
Baker City
Burns
Lakeview
ND
ND ND
‘85 90 95 00 05 10 15
‘85 90 95 00 05 10 15
Axis Key:
Sum of >USG for
the five year block
‘85 = 1985 to 1989
‘90 = 1990 to 1994
‘95 = 1995 to 1999
‘00 = 2000 to 2004
‘05 = 2005 to 2009
‘10 = 2010 to 2014
‘15 = 2015 to 2019
AQI days ≥USG caused by wildfire smoke in five year totals
6
Air Quality Division
7. Discussion Wildfire smoke impacts are increasing across the state. There are more ≥USG days per year
and more years with at least one ≥USG. The most significant impacts from fires are in
Southern Oregon. Eastern Oregon also experiences more ≥USG than in the past. Portland
did not experience smoke impacts at all from 1985 until 2015, and then three out of the next
five years had smoke impacts.
Based on the AQI, associated health impact levels are also increasing. There are more
“unhealthy,” “very unhealthy” and “hazardous” days than in the past.
Between 1987 and 2014, Bend had five unhealthy days. Between 2015 to 2019, Bend has
had 13 unhealthy days. In 2017, Bend had three “very unhealthy” days for the first time
since monitoring started in 1987.
Klamath Falls had 22 “unhealthy” days before 2015 and had 35 “unhealthy” days
between 2015 and 2019. Klamath Falls had two “very unhealthy” days before 2015 and
four between 2015 and 2019.
Medford had 18 “unhealthy” days between 1985 and 2014 and had 41 between 2015 and
2019. Medford had nine “very unhealthy” days between 1985 and 2014, mostly in 1987.
From 2015 to 2019, Medford had 10. Medford had one “hazardous” day in 1987 and did
not have another one until 2017.
Portland had no “unhealthy” days between 1985 and 2014 and had five from 2015 to
2019.
7
Air Quality Division
Table 2. Number of USG or worse days from Wildfire Smoke Impacts.
a. Errata: Earlier data released for Portland showed one unhealthy for sensitive groups
day in 1985 and one in 1990 but these were subsequently changed to zero because they
were determined to be from field burning.
b. Data does not include July 4 Fireworks.
c. “-“ = no data collected
d. Federal Reference Method data and correlated nephelometer light scattering data used
US
G
Un
healt
hy
Very
Un
healt
hy
Su
m
% D
ata
Co
mp
lete
ness
US
G
Un
healt
hy
Very
Un
healt
hy
Su
m
% D
ata
Co
mp
lete
ness
US
G
Un
healt
hy
Very
Un
healt
hy
Hazard
ou
s
Su
m
% D
ata
Co
mp
lete
ness
US
G
Un
healt
hy
Su
m
% D
ata
Co
mp
lete
ness
1985 - - - - - - - - - - 93% 98%
1986 - - - - - - - - - - 99% 50%
1987 - - - - - - - - - - 3 8 7 1 19 99% 100%
1988 - - - - - - - - - - 99% 95%
1989 - - - - - 93% 100% 98%
1990 2 2 95% 100% 97% 98%
1991 98% - 97% 100%
1992 100% - - - - - 1 1 100% 99%
1993 90% - - - - - 97% 97%
1994 97% - - - - - 97% 100%
1995 98% - - - - - 97% 97%
1996 1 1 84% - 89% 60%
1997 97% - - - - - 93% 70%
1998 100% - - - - - 97% 98%
1999 97% 80% 88% 100%
2000 100% 100% 100% 98%
2001 100% 100% 100% 100%
2002 94% 9 13 2 24 100% 8 4 12 100% 100%
2003 100% 100% 1 100% 100%
2004 100% 100% 98% 100%
2005 100% 100% 100% 97%
2006 98% 98% 100% 98%
2007 100% 99% 100% 99%
2008 100% 1 1 100% 7 7 100% 98%
2009 1 1 91% 1 2 3 98% 1 1 2 96% 100%
2010 99% 97% 100% 100%
2011 99% 100% 98% 100%
2012 2 2 4 99% 1 3 4 100% 100% 100%
2013 100% 1 4 5 98% 1 4 2 7 98% 99%
2014 1 1 100% 1 1 100% 100% 100%
2015 1 1 2 100% 7 2 9 100% 6 7 13 100% 2 2 100%
2016 99% 100% 100% 100%
2017 4 8 3 15 94% 7 8 1 16 100% 6 9 4 1 20 100% 4 2 6 98%
2018 4 4 8 100% 10 25 3 38 99% 8 22 3 33 100% 5 1 6 100%
2019 94% 100% 3 3 6 100% 100%
Bend Klamath Falls Medford Portland
8
Air Quality Division
Figure 3. Bend ≥ USG AQI wildfire smoke trends.
Figure 4. Klamath Falls ≥ USG AQI wildfire smoke trends. Notes: No data was collected during the summer from 1991 through 1995, 1997, and 1998.
12
1
4 42
1
2
8
4
3
0
2
4
6
8
10
12
14
16
198
9
1990
199
1
199
2
199
3
199
4
199
5
199
6
199
7
199
8
199
9
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
2010
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Bend Wildfire Smoke by AQI Category
USG Unhealthy Very Unhealthy
15
8
2
4
9
1 1
7 7
10
13
23 4
2
8
252
1
3
0
5
10
15
20
25
30
35
40
198
9
199
0
199
9
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Klamath Falls Wildfire Smokeby AQI Category
USG Unhealthy Very Unhealthy
24
9
16
38
34
5
9
Air Quality Division
Figure 5. Medford ≥ USG AQI wildfire smoke trends.
Figure 6. Portland ≥ USG AQI wildfire smoke trends.
Note: Not included: There were four USG days in Portland in mid to late September, two in 1985, one in 1987,
and one in 1990. These were likely from field burning and are not shown here.
3
8
1
7
6 68
3
8
1
4
4
79
22
3
7
2
4
3
11
0
5
10
15
20
25
30
35
198
5
198
6
198
7
198
8
198
9
199
0
199
1
199
2
199
3
199
4
199
5
199
6
199
7
199
8
199
9
200
0
200
1
200
2
2003
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Medford Wildfire Smoke by AQI Category
USG Unhealthy Very Unhealthy Hazardous
19
12
2
7
13
20
33
6
4
5
2
2
1
0
1
2
3
4
5
6
7
198
5
198
6
198
7
198
8
198
9
199
0
199
1
199
2
199
3
199
4
199
5
199
6
199
7
199
8
199
9
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Portland Wildfires Smokeby AQI Category
USG Unhealthy Very Unhealthy Hazardous
6 6
10
Air Quality Division
8. Conclusion This report is intended to show the AQI trends from wildfire smoke impacts. The data shows that
AQI categories from wildfire smoke have been increasing starting around 2012 and there have been much
more frequent days at a more “unhealthy” level. If these trends continue, Oregon should expect to see an
increasing number of ≥USG during the summer, and not just in Southern Oregon but also across the state.
Learn More
EPA’s Wildland Fire Publications, Fact Sheets and Other Resources
AQI – A Guide to Air Quality and Your Health
Track current air quality on DEQ’s online Air Quality Index or the free smart phone app.
During wildfire season, you can also track air quality on the Oregon Smoke Blog.
Wildfire Smoke and Your Health, Public Health Division, Oregon Health Authority.
Alternative Formats DEQ can provide documents in an alternate format or in a language other than English upon request.
Call DEQ at 800-452-4011 or email [email protected].
11
Air Quality Division
Appendix Wildfire Trends for Individual Communities The graphs below show the number of days with an AQI ≥USG for 20 communities with monitoring data.
The horizontal axis (or date) varies for each chart depending on when monitoring was started.
Figure 7. Albany wildfire ≥ USG AQI wildfire smoke trends.
1
3
3
2
3
0
1
2
3
4
5
6
7
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Albany Wildfire Smoke by AQI Category
USG Unhealthy
6
12
Air Quality Division
Figure 8. Baker City wildfire ≥ USG AQI wildfire smoke trends.
Figure 9. Burns wildfire ≥ USG AQI wildfire smoke trends.
2 2
8
3
1
2
3
1
0
2
4
6
8
10
12
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Baker City Wildfire Smoke by AQI Category
USG Unhealthy
2
6
10
3
1
3
2
3
21
2 2
2
0
1
2
3
4
5
6
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Burns Wildfire Smoke by AQI Category
USG Unhealthy
5 5
4
13
Air Quality Division
Figure 10. Cave Junction wildfire ≥ USG AQI wildfire smoke trends.
Figure 11. Corvallis wildfire ≥ USG AQI wildfire smoke trends.
51 4
1 24
14
3
9
1 7
1
10
15
1
1
1
1
0
5
10
15
20
25
30
35
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
2011
2012
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Cave Junction Wildfire Smoke by AQI Category
USG Unhealthy Very Unhealthy Hazardous
15
29
10
5
3
15
1
1
2 2
1
0
1
2
3
199
9
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Corvallis Wildfire Smoke by AQI Category
USG Unhealthy
2
14
Air Quality Division
Figure 12. Cottage Grove wildfire ≥ USG AQI wildfire smoke trends.
Figure 13. Enterprise wildfire ≥ USG AQI wildfire smoke trends.
2
1
31
1
7
0
2
4
6
8
10
12
2008
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Cottage Grove Wildfire Smoke by AQI Category
USG Unhealthy
2
10
1
2
1
2
3
6
2
1
5
3
0
1
2
3
4
5
6
7
8
9
10
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Enterprise Wildfire Smoke by AQI Category
USG Unhealthy
8
9
15
Air Quality Division
Figure 14. Eugene/Springfield wildfire ≥ USG AQI wildfire smoke trends.
1985 and 1987 was likely field burning.
Figure 15. Grants Pass wildfire ≥ USG AQI wildfire smoke trends.
1
2 2
7
1
4
3
0
2
4
6
8
10
12
14
16
198
5
198
6
198
7
198
8
198
9
199
0
199
1
199
2
199
3
199
4
199
5
199
6
199
7
199
8
199
9
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Eugene/Springfield Wildfire Smoke by AQI Category
USG Unhealthy Very Unhealthy Hazardous
14
1
2
1
12 2
9
31
6
1
9
13
2
2
4
1
1
0
5
10
15
20
25
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber o
f Day
s
Grants Pass Wildfire Smoke by AQI Category
USG Unhealthy Very Unhealthy Hazardous
10
2
3
16
22
5
16
Air Quality Division
Figure 16. John Day wildfire ≥ USG AQI wildfire smoke trends.
Figure 17. Lakeview wildfire ≥ USG AQI wildfire smoke trends.
21
1
4
5
1
1
1
5
2
2
0
1
2
3
4
5
6
7
8
9
10
200
0
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
John Day Wildfire Smoke by AQI Category
USG Unhealthy
3
2
9
3
7
8
3
2
1 3
12
1
9
0
5
10
15
20
25
199
9
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Lakeview Wildfire Smoke by AQI Category
USG Unhealthy
21
4
17
Air Quality Division
Figure 18. La Grande wildfire ≥ USG AQI wildfire smoke trends.
Figure 19. Oakridge wildfire ≥ USG AQI wildfire smoke trends.
1 1 12
1
4 4
51
2
3 1
0
1
2
3
4
5
6
7
8
198
9
199
0
199
1
199
2
199
3
199
4
199
5
199
6
199
7
199
8
199
9
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
La Grande Wildfire Smoke by AQI Category
USG Unhealthy
6
3
6
7
21
1
7
2
1
1
8
1
2
0
2
4
6
8
10
12
14
16
18
199
7
199
8
199
9
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Oakridge Wildfire Smoke by AQI Category
USG Unhealthy Very Unhealthy
3
2
17
3
18
Air Quality Division
Figure 20. Pendleton wildfire ≥ USG AQI wildfire smoke trends.
Figure 21. Prineville wildfire ≥ USG AQI wildfire smoke trends.
2
7
5
2
2
3
1
1
0
2
4
6
8
10
12
199
9
200
0
200
1
200
2
200
3
200
4
200
5
2006
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
2019
Num
ber
of D
ays
Pendleton Wildfire Smoke by AQI Category
USG Unhealthy Very Unhealthy Hazardous
4
10
9
13
5
3
2
2
7
2
0
2
4
6
8
10
12
14
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Prineville Wildfire Smoke by AQI Category
USG Unhealthy
5
12
5
19
Air Quality Division
Figure 22. Roseburg wildfire ≥ USG AQI wildfire smoke trends.
Figure 23. Salem wildfire ≥ USG AQI wildfire smoke trends.
1 1
42
3
0
1
2
3
4
5
6
7
8
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Roseburg Wildfire Smoke by AQI Category
USG Unhealthy
7
1
2
4
2
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
199
3
199
4
199
5
199
6
199
7
199
8
199
9
200
0
200
1
200
2
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Salem Wildfire Smoke by AQI Category
USG Unhealthy
20
Air Quality Division
Figure 24. Sisters wildfire ≥ USG AQI wildfire smoke trends.
Figure 25. Sweet Home wildfire ≥ USG AQI wildfire smoke trends.
1 32
610
1
14
2
2
8
4
3
0
5
10
15
20
25
30
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Sisters Wildfire Smoke by AQI Category
USG Unhealthy Very Unhealthy Hazardous
17
27
4
8
4
1
2
5
0
1
2
3
4
5
6
7
8
9
10
200
7
2008
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber
of D
ays
Sweet Home Wildfire Smoke by AQI Category
USG Unhealthy
9
21
Air Quality Division
Figure 26. The Dalles wildfire ≥ USG AQI wildfire smoke trends.
2
6 4
1 2
8
2
1
0
2
4
6
8
10
12
14
16
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
201
4
201
5
201
6
201
7
201
8
201
9
Num
ber o
f Day
sThe Dalles Wildfire Smoke
by AQI Category
USG Unhealthy Very Unhealthy Hazardous
6
15
3