Daily Air Quality Index summaries from EPA monitors in Benewah, Idaho, 2000–2025.
63%
Good days in 2025
41
Median daily AQI, 2025
0
Days above 100 in 2025
363
Days with an AQI in 2025 (of 365)
In 2025, EPA reported a daily Air Quality Index (AQI) for Benewah, Idaho on 363 days. 230 of those days (63%) were in the Good range, and the median daily AQI was 41. That median is higher than the typical monitored county in Idaho (median 35 across 18 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 363 days. Across the years with fuller monitoring, the share of Good days fell: an average of 75% in 2001–2004 versus 60% in 2023–2025.
Years with fewer than 120 monitored days (2000, 2002) are shown in the table but left out of comparisons and trend statements.
How the days broke down each year
Each bar is one year. The colored segments show the share of monitored days that fell in each AQI category.
Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous
Typical and high-end AQI over time
The median is the middle day of the year. The 90th percentile is the level that only the highest 10% of days exceeded.
Median daily AQI
90th-percentile daily AQI
Main pollutant by day, 2025
On each monitored day, the AQI reflects whichever measured pollutant had the highest index. This counts how many days each pollutant set the AQI. A pollutant that was not measured here cannot appear.
Pollutant
Days as main pollutant
Share of monitored days
Fine particles (PM2.5)
363
100%
Year-by-year data
Annual AQI summary by year
Year
Days with AQI
Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous
Median AQI
90th pct.
Max AQI
Main pollutant
2025
363
230
133
0
0
0
0
41
66
92
PM2.5
2024
365
225
136
4
0
0
0
43
65
112
PM2.5
2023
365
201
160
2
2
0
0
48
72
164
PM2.5
2022
365
187
167
8
3
0
0
49
69
177
PM2.5
2021
364
182
168
7
7
0
0
51
74
197
PM2.5
2020
366
218
139
2
3
3
1
42
69
492
PM2.5
2019
364
188
165
9
2
0
0
49
77
155
PM2.5
2018
361
156
192
11
2
0
0
53
80
164
PM2.5
2017
365
158
177
20
8
1
1
53
96
362
PM2.5
2016
366
214
144
7
1
0
0
43
71
177
PM2.5
2015
365
123
219
18
5
0
0
55
81
190
PM2.5
2014
362
199
150
13
0
0
0
46
77
136
PM2.5
2013
359
233
125
0
1
0
0
41
62
163
PM2.5
2012
360
260
99
1
0
0
0
34
63
105
PM2.5
2011
361
282
79
0
0
0
0
32
57
99
PM2.5
2010
363
214
147
2
0
0
0
43
66
131
PM2.5
2009
364
237
119
8
0
0
0
42
68
148
PM2.5
2008
356
256
99
1
0
0
0
37
60
108
PM2.5
2007
303
221
81
1
0
0
0
37
60
108
PM2.5
2006
365
281
82
2
0
0
0
33
60
131
PM2.5
2005
362
274
86
2
0
0
0
38
57
126
PM2.5
2004
209
121
86
2
0
0
0
43
67
133
PM2.5
2003
120
89
28
2
1
0
0
37
61
161
PM10
2002
116
109
7
0
0
0
0
24
45
77
PM10
2001
122
115
7
0
0
0
0
21
41
93
PM10
2000
64
62
2
0
0
0
0
23
44
59
PM10
What this data can and can’t tell you
It is a county-level summary. EPA reports one AQI per day for the county, based on the monitors operating there. Air at a particular street, school or home can differ, especially near roads, industry or wildfire smoke.
It is not a health assessment. The AQI is EPA’s scale for communicating daily air quality. A county’s history can’t tell you what the health risk is for any particular person. For daily conditions and health guidance, see AirNow.
Rules change over time. EPA has revised AQI breakpoints, most recently for fine particles in 2024, so some year-to-year change can reflect the scale rather than the air.
Counties in Idaho with a similar median AQI in 2025
