Daily Air Quality Index summaries from EPA monitors in Dona Ana, New Mexico, 1980–2025.
27%
Good days in 2025
61
Median daily AQI, 2025
48
Days above 100 in 2025
365
Days with an AQI in 2025 (of 365)
In 2025, EPA reported a daily Air Quality Index (AQI) for Dona Ana, New Mexico on 365 days. 100 of those days (27%) were in the Good range, and the median daily AQI was 61. That median is higher than the typical monitored county in New Mexico (median 44 across 13 counties), and higher than the typical monitored U.S. county (40). The main pollutant was ozone on 148 days. Across the years with fuller monitoring, the share of Good days fell: an average of 74% in 1980–1982 versus 33% in 2023–2025.
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
Ozone
148
41%
Fine particles (PM2.5)
122
33%
Coarse particles (PM10)
95
26%
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
365
100
217
27
6
5
10
61
115
528
Ozone
2024
366
97
237
19
6
3
4
62
97
692
Ozone
2023
365
162
189
11
3
0
0
52
87
196
Ozone
2022
365
157
179
24
1
2
2
53
93
367
Ozone
2021
365
126
208
20
8
1
2
56
94
683
Ozone
2020
366
144
201
15
3
1
2
54
88
389
Ozone
2019
365
156
185
17
3
2
2
54
87
645
Ozone
2018
365
121
212
28
4
0
0
58
100
187
Ozone
2017
365
116
215
27
4
0
3
58
100
630
Ozone
2016
366
111
240
12
2
0
1
56
87
594
Ozone
2015
365
109
244
11
1
0
0
55
82
157
PM2.5
2014
365
179
166
13
4
2
1
51
82
450
Ozone
2013
365
149
162
39
8
2
5
58
112
453
Ozone
2012
366
136
199
23
1
1
6
54
97
1762
Ozone
2011
365
116
219
22
3
1
4
59
95
818
Ozone
2010
365
120
233
7
1
0
4
56
84
690
Ozone
2009
365
97
254
13
1
0
0
58
85
157
Ozone
2008
366
94
228
32
5
4
3
59
105
411
PM2.5
2007
365
130
210
22
3
0
0
58
93
187
Ozone
2006
365
102
224
27
7
3
2
58
101
385
Ozone
2005
365
122
213
29
0
0
1
57
97
916
Ozone
2004
366
114
215
30
4
2
1
59
101
1063
Ozone
2003
365
69
238
49
4
2
3
64
112
1061
Ozone
2002
365
85
237
37
6
0
0
62
105
188
PM2.5
2001
365
101
233
26
4
1
0
61
100
240
Ozone
2000
366
86
235
38
7
0
0
67
105
200
Ozone
1999
365
52
277
33
3
0
0
64
100
190
PM2.5
1998
365
112
204
33
9
3
4
61
119
1471
Ozone
1997
365
125
190
42
1
1
6
58
108
1234
Ozone
1996
366
86
215
50
8
2
5
63
122
1512
PM10
1995
365
123
214
24
4
0
0
57
97
178
Ozone
1994
365
156
185
20
2
1
1
54
93
373
Ozone
1993
365
224
127
11
3
0
0
46
80
197
Ozone
1992
366
233
118
15
0
0
0
46
76
140
Ozone
1991
365
206
153
6
0
0
0
47
72
112
Ozone
1990
365
225
131
9
0
0
0
47
74
140
Ozone
1989
365
143
207
13
2
0
0
55
90
172
Ozone
1988
366
172
171
21
2
0
0
52
90
182
Ozone
1987
365
223
127
14
1
0
0
47
79
152
Ozone
1986
365
225
126
11
3
0
0
46
87
179
Ozone
1985
365
267
88
10
0
0
0
43
74
143
Ozone
1984
366
279
82
4
1
0
0
44
65
154
Ozone
1983
365
262
97
6
0
0
0
44
71
126
Ozone
1982
365
284
76
5
0
0
0
42
62
136
Ozone
1981
365
232
123
9
1
0
0
46
80
156
Ozone
1980
366
290
76
0
0
0
0
40
60
97
CO
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 New Mexico with a similar median AQI in 2025
