Milton Blue Hill Observatory, Milton, Massachusetts, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
November Air Quality Analysis
Milton Blue Hill Observatory, Milton, Massachusetts, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
17th Nov 2023
65AQILowest AQI recorded on
11th Nov 2025
11AQISame Day Analysis (19th November ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 24 of Good air quality, showing improvement over 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 19th Nov - 20th Nov 2025
Milton Blue Hill Observatory, Milton, Massachusetts, United States
AQI
Day
Night
.
6 AM19th Nov 2025
4 PM
5 AM20th Nov 2025
Day time
Avg. Highest Time
8AM19th Nov
22AQI
Avg. Lowest Time
7AM19th Nov
17AQI
Night time
Avg. Highest Time
7PM19th Nov
83AQI
Avg. Lowest Time
9PM19th Nov
21AQI
In the last 24 hours,
Milton Blue Hill Observatory's AQI reached its highest point of 83 at 7 PM during the Night, while the lowest point, 17, was recorded at 7 AM during the Day between 19th Nov and 20th Nov 2025.
Day & Night AQI Trend : Oct - Nov 2025
Milton Blue Hill Observatory, Milton, Massachusetts, United States
OctNov
21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th
Day
Night
21st Oct 2025246 AMAQI
21st Oct 2025247 AMAQI
21st Oct 2025278 AMAQI
21st Oct 2025269 AMAQI
21st Oct 20251210 AMAQI
21st Oct 20251111 AMAQI
21st Oct 20251112 PMAQI
21st Oct 2025161 PMAQI
21st Oct 2025172 PMAQI
21st Oct 2025173 PMAQI
21st Oct 2025214 PMAQI
21st Oct 2025225 PMAQI
21st Oct 2025186 PMAQI
21st Oct 2025177 PMAQI
21st Oct 2025128 PMAQI
21st Oct 2025169 PMAQI
21st Oct 20251710 PMAQI
21st Oct 20251711 PMAQI
22nd Oct 20252112 AMAQI
22nd Oct 2025181 AMAQI
22nd Oct 2025252 AMAQI
22nd Oct 2025193 AMAQI
22nd Oct 2025174 AMAQI
22nd Oct 2025265 AMAQI
--°C/°C
22nd Oct 2025196 AMAQI
22nd Oct 2025177 AMAQI
22nd Oct 2025178 AMAQI
22nd Oct 2025179 AMAQI
22nd Oct 20251710 AMAQI
22nd Oct 20251711 AMAQI
22nd Oct 20251712 PMAQI
22nd Oct 2025171 PMAQI
22nd Oct 2025262 PMAQI
22nd Oct 2025283 PMAQI
22nd Oct 2025234 PMAQI
22nd Oct 2025275 PMAQI
22nd Oct 2025236 PMAQI
22nd Oct 2025227 PMAQI
22nd Oct 2025188 PMAQI
22nd Oct 2025179 PMAQI
22nd Oct 20251710 PMAQI
22nd Oct 20251711 PMAQI
23rd Oct 20251712 AMAQI
23rd Oct 2025171 AMAQI
23rd Oct 2025172 AMAQI
23rd Oct 2025123 AMAQI
23rd Oct 2025114 AMAQI
23rd Oct 2025165 AMAQI
13°C9/19°C
23rd Oct 2025176 AMAQI
23rd Oct 2025177 AMAQI
23rd Oct 2025178 AMAQI
23rd Oct 2025179 AMAQI
23rd Oct 20251710 AMAQI
23rd Oct 20251711 AMAQI
23rd Oct 20251712 PMAQI
23rd Oct 2025171 PMAQI
23rd Oct 2025172 PMAQI
23rd Oct 2025173 PMAQI
23rd Oct 2025124 PMAQI
23rd Oct 2025165 PMAQI
23rd Oct 2025176 PMAQI
23rd Oct 2025127 PMAQI
23rd Oct 2025118 PMAQI
23rd Oct 2025169 PMAQI
23rd Oct 20251710 PMAQI
23rd Oct 20251711 PMAQI
24th Oct 20251712 AMAQI
24th Oct 2025171 AMAQI
24th Oct 2025172 AMAQI
24th Oct 2025173 AMAQI
24th Oct 2025174 AMAQI
24th Oct 2025125 AMAQI
11°C8/17°C
24th Oct 2025166 AMAQI
24th Oct 2025127 AMAQI
24th Oct 2025168 AMAQI
24th Oct 2025179 AMAQI
24th Oct 20251710 AMAQI
24th Oct 20251711 AMAQI
24th Oct 20252112 PMAQI
24th Oct 2025221 PMAQI
24th Oct 2025182 PMAQI
24th Oct 2025173 PMAQI
24th Oct 2025174 PMAQI
24th Oct 2025175 PMAQI
24th Oct 2025126 PMAQI
24th Oct 2025117 PMAQI
24th Oct 2025118 PMAQI
24th Oct 2025119 PMAQI
24th Oct 20251110 PMAQI
24th Oct 20251511 PMAQI
25th Oct 20251712 AMAQI
25th Oct 2025171 AMAQI
25th Oct 2025172 AMAQI
25th Oct 2025173 AMAQI
25th Oct 2025174 AMAQI
25th Oct 2025175 AMAQI
9°C4/15°C
25th Oct 2025126 AMAQI
25th Oct 2025117 AMAQI
25th Oct 2025118 AMAQI
25th Oct 2025119 AMAQI
25th Oct 20251610 AMAQI
25th Oct 20251711 AMAQI
25th Oct 20251212 PMAQI
25th Oct 2025161 PMAQI
25th Oct 2025172 PMAQI
25th Oct 2025173 PMAQI
25th Oct 2025174 PMAQI
25th Oct 2025175 PMAQI
25th Oct 2025126 PMAQI
25th Oct 2025167 PMAQI
25th Oct 2025178 PMAQI
25th Oct 2025219 PMAQI
25th Oct 20252210 PMAQI
25th Oct 20252611 PMAQI
26th Oct 20252812 AMAQI
26th Oct 2025281 AMAQI
26th Oct 2025282 AMAQI
26th Oct 2025283 AMAQI
26th Oct 2025324 AMAQI
26th Oct 2025285 AMAQI
7°C2/13°C
26th Oct 2025286 AMAQI
26th Oct 2025327 AMAQI
26th Oct 2025298 AMAQI
26th Oct 2025289 AMAQI
26th Oct 20252310 AMAQI
26th Oct 20251811 AMAQI
26th Oct 20251712 PMAQI
26th Oct 2025171 PMAQI
26th Oct 2025172 PMAQI
26th Oct 2025173 PMAQI
26th Oct 2025174 PMAQI
26th Oct 2025175 PMAQI
26th Oct 2025176 PMAQI
26th Oct 2025177 PMAQI
26th Oct 2025218 PMAQI
26th Oct 2025229 PMAQI
26th Oct 20252210 PMAQI
26th Oct 20252211 PMAQI
27th Oct 20252212 AMAQI
27th Oct 2025181 AMAQI
27th Oct 2025172 AMAQI
27th Oct 2025173 AMAQI
27th Oct 2025174 AMAQI
27th Oct 2025125 AMAQI
7°C2/11°C
27th Oct 2025166 AMAQI
27th Oct 2025177 AMAQI
27th Oct 2025178 AMAQI
27th Oct 2025179 AMAQI
27th Oct 20251710 AMAQI
27th Oct 20252611 AMAQI
27th Oct 20251812 PMAQI
27th Oct 2025171 PMAQI
27th Oct 2025172 PMAQI
27th Oct 2025173 PMAQI
27th Oct 2025174 PMAQI
27th Oct 2025175 PMAQI
27th Oct 2025176 PMAQI
27th Oct 2025207 PMAQI
27th Oct 2025178 PMAQI
27th Oct 2025179 PMAQI
27th Oct 20252210 PMAQI
27th Oct 20252211 PMAQI
28th Oct 20252212 AMAQI
28th Oct 2025181 AMAQI
28th Oct 2025172 AMAQI
28th Oct 2025173 AMAQI
28th Oct 2025174 AMAQI
28th Oct 2025125 AMAQI
5°C0/11°C
28th Oct 2025116 AMAQI
28th Oct 2025117 AMAQI
28th Oct 2025118 AMAQI
28th Oct 2025169 AMAQI
28th Oct 20251310 AMAQI
28th Oct 20251111 AMAQI
28th Oct 20251112 PMAQI
28th Oct 2025111 PMAQI
28th Oct 2025132 PMAQI
28th Oct 2025133 PMAQI
28th Oct 2025154 PMAQI
28th Oct 2025115 PMAQI
28th Oct 2025116 PMAQI
28th Oct 2025117 PMAQI
28th Oct 2025118 PMAQI
28th Oct 2025119 PMAQI
28th Oct 20251110 PMAQI
28th Oct 20251111 PMAQI
29th Oct 20251112 AMAQI
29th Oct 2025131 AMAQI
29th Oct 2025112 AMAQI
29th Oct 2025113 AMAQI
29th Oct 2025114 AMAQI
29th Oct 2025115 AMAQI
6°C2/10°C
29th Oct 2025116 AMAQI
29th Oct 2025117 AMAQI
29th Oct 2025208 AMAQI
29th Oct 2025129 AMAQI
29th Oct 20251110 AMAQI
29th Oct 20251111 AMAQI
29th Oct 20251512 PMAQI
29th Oct 2025211 PMAQI
29th Oct 2025222 PMAQI
29th Oct 2025193 PMAQI
29th Oct 2025124 PMAQI
29th Oct 2025135 PMAQI
29th Oct 2025136 PMAQI
29th Oct 2025167 PMAQI
29th Oct 2025178 PMAQI
29th Oct 2025179 PMAQI
29th Oct 20251710 PMAQI
29th Oct 20251711 PMAQI
30th Oct 20251712 AMAQI
30th Oct 2025171 AMAQI
30th Oct 2025172 AMAQI
30th Oct 2025123 AMAQI
30th Oct 2025114 AMAQI
30th Oct 2025115 AMAQI
8°C7/8°C
30th Oct 2025116 AMAQI
30th Oct 2025117 AMAQI
30th Oct 2025168 AMAQI
30th Oct 2025129 AMAQI
30th Oct 20251610 AMAQI
30th Oct 20251711 AMAQI
30th Oct 20251812 PMAQI
30th Oct 2025131 PMAQI
30th Oct 2025202 PMAQI
30th Oct 2025143 PMAQI
30th Oct 2025354 PMAQI
30th Oct 2025295 PMAQI
30th Oct 2025186 PMAQI
30th Oct 2025277 PMAQI
30th Oct 2025168 PMAQI
30th Oct 2025319 PMAQI
30th Oct 20252910 PMAQI
30th Oct 20254611 PMAQI
31st Oct 20254012 AMAQI
31st Oct 2025271 AMAQI
31st Oct 2025182 AMAQI
31st Oct 2025173 AMAQI
31st Oct 2025174 AMAQI
31st Oct 2025125 AMAQI
10°C8/11°C
31st Oct 2025116 AMAQI
31st Oct 2025117 AMAQI
31st Oct 2025118 AMAQI
31st Oct 2025119 AMAQI
31st Oct 20252110 AMAQI
31st Oct 20251311 AMAQI
31st Oct 20251112 PMAQI
31st Oct 2025111 PMAQI
31st Oct 2025112 PMAQI
31st Oct 2025163 PMAQI
31st Oct 2025124 PMAQI
31st Oct 2025115 PMAQI
31st Oct 2025116 PMAQI
31st Oct 2025117 PMAQI
31st Oct 2025118 PMAQI
31st Oct 2025119 PMAQI
31st Oct 20251110 PMAQI
31st Oct 20251111 PMAQI
1st Nov 20251112 AMAQI
1st Nov 2025111 AMAQI
1st Nov 2025112 AMAQI
1st Nov 2025113 AMAQI
1st Nov 202594 AMAQI
1st Nov 202585 AMAQI
11°C9/16°C
1st Nov 2025116 AMAQI
1st Nov 2025137 AMAQI
1st Nov 202598 AMAQI
1st Nov 2025109 AMAQI
1st Nov 20251010 AMAQI
1st Nov 20251111 AMAQI
1st Nov 20251612 PMAQI
1st Nov 2025171 PMAQI
1st Nov 2025172 PMAQI
1st Nov 2025173 PMAQI
1st Nov 2025174 PMAQI
1st Nov 2025175 PMAQI
1st Nov 2025176 PMAQI
1st Nov 2025127 PMAQI
1st Nov 2025168 PMAQI
1st Nov 2025179 PMAQI
1st Nov 20251710 PMAQI
1st Nov 20251211 PMAQI
2nd Nov 20251112 AMAQI
2nd Nov 2025111 AMAQI
2nd Nov 2025112 AMAQI
2nd Nov 2025113 AMAQI
2nd Nov 2025114 AMAQI
2nd Nov 2025115 AMAQI
8°C4/14°C
2nd Nov 2025116 AMAQI
2nd Nov 2025117 AMAQI
2nd Nov 2025118 AMAQI
2nd Nov 2025119 AMAQI
2nd Nov 20251110 AMAQI
2nd Nov 20251111 AMAQI
2nd Nov 20251612 PMAQI
2nd Nov 2025171 PMAQI
2nd Nov 2025172 PMAQI
2nd Nov 2025173 PMAQI
2nd Nov 2025174 PMAQI
2nd Nov 2025175 PMAQI
2nd Nov 2025176 PMAQI
2nd Nov 2025217 PMAQI
2nd Nov 2025228 PMAQI
2nd Nov 2025279 PMAQI
2nd Nov 20252810 PMAQI
2nd Nov 20252811 PMAQI
3rd Nov 20252812 AMAQI
3rd Nov 2025281 AMAQI
3rd Nov 2025232 AMAQI
3rd Nov 2025273 AMAQI
3rd Nov 2025324 AMAQI
3rd Nov 2025295 AMAQI
6°C1/11°C
3rd Nov 2025286 AMAQI
3rd Nov 2025287 AMAQI
3rd Nov 2025328 AMAQI
3rd Nov 2025389 AMAQI
3rd Nov 20254310 AMAQI
3rd Nov 20252611 AMAQI
3rd Nov 20252212 PMAQI
3rd Nov 2025221 PMAQI
3rd Nov 2025222 PMAQI
3rd Nov 2025223 PMAQI
3rd Nov 2025224 PMAQI
3rd Nov 2025185 PMAQI
3rd Nov 2025216 PMAQI
3rd Nov 2025227 PMAQI
3rd Nov 2025188 PMAQI
3rd Nov 2025179 PMAQI
3rd Nov 20251710 PMAQI
3rd Nov 20251311 PMAQI
4th Nov 20251112 AMAQI
4th Nov 2025231 AMAQI
4th Nov 2025152 AMAQI
4th Nov 2025113 AMAQI
4th Nov 2025114 AMAQI
4th Nov 2025115 AMAQI
7°C1/12°C
4th Nov 202586 AMAQI
4th Nov 2025107 AMAQI
4th Nov 2025118 AMAQI
4th Nov 2025119 AMAQI
4th Nov 20251110 AMAQI
4th Nov 20251111 AMAQI
4th Nov 20251112 PMAQI
4th Nov 2025111 PMAQI
4th Nov 2025112 PMAQI
4th Nov 2025163 PMAQI
4th Nov 2025174 PMAQI
4th Nov 2025125 PMAQI
4th Nov 2025116 PMAQI
4th Nov 2025167 PMAQI
4th Nov 2025178 PMAQI
4th Nov 2025179 PMAQI
4th Nov 20251710 PMAQI
4th Nov 20251711 PMAQI
5th Nov 20251712 AMAQI
5th Nov 2025171 AMAQI
5th Nov 2025172 AMAQI
5th Nov 2025133 AMAQI
5th Nov 2025114 AMAQI
5th Nov 2025115 AMAQI
8°C4/14°C
5th Nov 2025116 AMAQI
5th Nov 2025117 AMAQI
5th Nov 2025118 AMAQI
5th Nov 2025119 AMAQI
5th Nov 20251610 AMAQI
5th Nov 20251711 AMAQI
5th Nov 20251712 PMAQI
5th Nov 2025171 PMAQI
5th Nov 2025212 PMAQI
5th Nov 2025223 PMAQI
5th Nov 2025424 PMAQI
5th Nov 2025445 PMAQI
5th Nov 2025186 PMAQI
5th Nov 2025117 PMAQI
5th Nov 2025168 PMAQI
5th Nov 2025269 PMAQI
5th Nov 20252810 PMAQI
5th Nov 20252811 PMAQI
6th Nov 20254612 AMAQI
6th Nov 2025281 AMAQI
6th Nov 2025182 AMAQI
6th Nov 2025133 AMAQI
6th Nov 2025114 AMAQI
6th Nov 2025115 AMAQI
8°C2/15°C
6th Nov 2025176 AMAQI
6th Nov 2025157 AMAQI
6th Nov 2025208 AMAQI
6th Nov 2025129 AMAQI
6th Nov 20251110 AMAQI
6th Nov 20251111 AMAQI
6th Nov 20251112 PMAQI
6th Nov 2025111 PMAQI
6th Nov 2025112 PMAQI
6th Nov 2025113 PMAQI
6th Nov 2025114 PMAQI
6th Nov 2025165 PMAQI
6th Nov 2025176 PMAQI
6th Nov 2025177 PMAQI
6th Nov 2025178 PMAQI
6th Nov 2025179 PMAQI
6th Nov 20251710 PMAQI
6th Nov 20252111 PMAQI
7th Nov 20251312 AMAQI
7th Nov 2025111 AMAQI
7th Nov 2025112 AMAQI
7th Nov 2025113 AMAQI
7th Nov 2025114 AMAQI
7th Nov 2025115 AMAQI
7°C2/9°C
7th Nov 2025116 AMAQI
7th Nov 2025117 AMAQI
7th Nov 2025118 AMAQI
7th Nov 2025119 AMAQI
7th Nov 20251610 AMAQI
7th Nov 20251711 AMAQI
7th Nov 20251712 PMAQI
7th Nov 2025171 PMAQI
7th Nov 2025172 PMAQI
7th Nov 2025173 PMAQI
7th Nov 2025174 PMAQI
7th Nov 2025125 PMAQI
7th Nov 2025116 PMAQI
7th Nov 2025117 PMAQI
7th Nov 2025118 PMAQI
7th Nov 2025119 PMAQI
7th Nov 20251110 PMAQI
7th Nov 20251111 PMAQI
8th Nov 20251112 AMAQI
8th Nov 2025111 AMAQI
8th Nov 2025112 AMAQI
8th Nov 2025113 AMAQI
8th Nov 2025164 AMAQI
8th Nov 2025175 AMAQI
6°C-1/13°C
8th Nov 2025216 AMAQI
8th Nov 2025227 AMAQI
8th Nov 2025268 AMAQI
8th Nov 2025289 AMAQI
8th Nov 20253710 AMAQI
8th Nov 20253911 AMAQI
8th Nov 20253912 PMAQI
8th Nov 2025391 PMAQI
8th Nov 2025392 PMAQI
8th Nov 2025343 PMAQI
8th Nov 2025294 PMAQI
8th Nov 2025235 PMAQI
8th Nov 2025226 PMAQI
8th Nov 2025227 PMAQI
8th Nov 2025228 PMAQI
8th Nov 2025229 PMAQI
8th Nov 20252210 PMAQI
8th Nov 20252211 PMAQI
9th Nov 20252212 AMAQI
9th Nov 2025221 AMAQI
9th Nov 2025312 AMAQI
9th Nov 2025333 AMAQI
9th Nov 2025284 AMAQI
9th Nov 2025235 AMAQI
11°C6/17°C
9th Nov 2025226 AMAQI
9th Nov 2025227 AMAQI
9th Nov 2025228 AMAQI
9th Nov 2025189 AMAQI
9th Nov 20251710 AMAQI
9th Nov 20252211 AMAQI
9th Nov 20253212 PMAQI
9th Nov 2025431 PMAQI
9th Nov 2025402 PMAQI
9th Nov 2025393 PMAQI
9th Nov 2025394 PMAQI
9th Nov 2025445 PMAQI
9th Nov 2025446 PMAQI
9th Nov 2025347 PMAQI
9th Nov 2025418 PMAQI
9th Nov 2025449 PMAQI
9th Nov 20252610 PMAQI
9th Nov 20253511 PMAQI
10th Nov 20254412 AMAQI
10th Nov 2025521 AMAQI
10th Nov 2025532 AMAQI
10th Nov 2025353 AMAQI
10th Nov 2025334 AMAQI
10th Nov 2025335 AMAQI
10°C4/16°C
10th Nov 2025386 AMAQI
10th Nov 2025347 AMAQI
10th Nov 2025438 AMAQI
10th Nov 2025349 AMAQI
10th Nov 20252310 AMAQI
10th Nov 20255111 AMAQI
10th Nov 20251512 PMAQI
10th Nov 2025161 PMAQI
10th Nov 2025212 PMAQI
10th Nov 2025183 PMAQI
10th Nov 2025174 PMAQI
10th Nov 2025175 PMAQI
10th Nov 2025146 PMAQI
10th Nov 2025167 PMAQI
10th Nov 2025278 PMAQI
10th Nov 2025139 PMAQI
10th Nov 20251110 PMAQI
10th Nov 20251511 PMAQI
11th Nov 20251212 AMAQI
11th Nov 2025111 AMAQI
11th Nov 2025102 AMAQI
11th Nov 2025103 AMAQI
11th Nov 2025114 AMAQI
11th Nov 2025115 AMAQI
10°C5/12°C
11th Nov 2025116 AMAQI
11th Nov 2025117 AMAQI
11th Nov 2025108 AMAQI
11th Nov 2025109 AMAQI
11th Nov 20251110 AMAQI
11th Nov 20251111 AMAQI
11th Nov 20251112 PMAQI
11th Nov 2025111 PMAQI
11th Nov 2025112 PMAQI
11th Nov 2025113 PMAQI
11th Nov 2025114 PMAQI
11th Nov 2025115 PMAQI
11th Nov 2025116 PMAQI
11th Nov 2025117 PMAQI
11th Nov 2025118 PMAQI
11th Nov 2025119 PMAQI
11th Nov 20251110 PMAQI
11th Nov 20251111 PMAQI
12th Nov 20251112 AMAQI
12th Nov 2025111 AMAQI
12th Nov 2025112 AMAQI
12th Nov 2025113 AMAQI
12th Nov 2025114 AMAQI
12th Nov 2025115 AMAQI
1°C-1/2°C
12th Nov 2025116 AMAQI
12th Nov 2025117 AMAQI
12th Nov 2025168 AMAQI
12th Nov 2025129 AMAQI
12th Nov 20251610 AMAQI
12th Nov 20251711 AMAQI
12th Nov 20251712 PMAQI
12th Nov 2025211 PMAQI
12th Nov 2025222 PMAQI
12th Nov 2025273 PMAQI
12th Nov 2025284 PMAQI
12th Nov 2025285 PMAQI
12th Nov 2025286 PMAQI
12th Nov 2025287 PMAQI
12th Nov 2025288 PMAQI
12th Nov 2025289 PMAQI
12th Nov 20252810 PMAQI
12th Nov 20253211 PMAQI
13th Nov 20253312 AMAQI
13th Nov 2025331 AMAQI
13th Nov 2025332 AMAQI
13th Nov 2025333 AMAQI
13th Nov 2025334 AMAQI
13th Nov 2025285 AMAQI
2°C-1/8°C
13th Nov 2025236 AMAQI
13th Nov 2025187 AMAQI
13th Nov 2025178 AMAQI
13th Nov 2025179 AMAQI
13th Nov 20251710 AMAQI
13th Nov 20251211 AMAQI
13th Nov 20251612 PMAQI
13th Nov 2025111 PMAQI
13th Nov 2025112 PMAQI
13th Nov 2025163 PMAQI
13th Nov 2025124 PMAQI
13th Nov 2025115 PMAQI
13th Nov 2025166 PMAQI
13th Nov 2025177 PMAQI
13th Nov 2025178 PMAQI
13th Nov 2025129 PMAQI
13th Nov 20251110 PMAQI
13th Nov 20251111 PMAQI
14th Nov 20251112 AMAQI
14th Nov 2025111 AMAQI
14th Nov 2025112 AMAQI
14th Nov 2025113 AMAQI
14th Nov 2025114 AMAQI
14th Nov 2025115 AMAQI
4°C1/8°C
14th Nov 2025116 AMAQI
14th Nov 2025117 AMAQI
14th Nov 2025168 AMAQI
14th Nov 2025129 AMAQI
14th Nov 20251110 AMAQI
14th Nov 20251611 AMAQI
14th Nov 20251212 PMAQI
14th Nov 2025111 PMAQI
14th Nov 2025162 PMAQI
14th Nov 2025173 PMAQI
14th Nov 2025174 PMAQI
14th Nov 2025135 PMAQI
14th Nov 2025156 PMAQI
14th Nov 2025177 PMAQI
14th Nov 2025218 PMAQI
14th Nov 2025229 PMAQI
14th Nov 20252710 PMAQI
14th Nov 20252311 PMAQI
15th Nov 20251812 AMAQI
15th Nov 2025171 AMAQI
15th Nov 2025122 AMAQI
15th Nov 2025113 AMAQI
15th Nov 2025114 AMAQI
15th Nov 2025115 AMAQI
3°C0/7°C
15th Nov 2025116 AMAQI
15th Nov 2025117 AMAQI
15th Nov 2025168 AMAQI
15th Nov 2025179 AMAQI
15th Nov 20251710 AMAQI
15th Nov 20251711 AMAQI
15th Nov 20251712 PMAQI
15th Nov 2025211 PMAQI
15th Nov 2025222 PMAQI
15th Nov 2025223 PMAQI
15th Nov 2025224 PMAQI
15th Nov 2025225 PMAQI
15th Nov 2025226 PMAQI
15th Nov 2025227 PMAQI
15th Nov 2025328 PMAQI
15th Nov 2025389 PMAQI
15th Nov 20253410 PMAQI
15th Nov 20253311 PMAQI
16th Nov 20252312 AMAQI
16th Nov 2025221 AMAQI
16th Nov 2025182 AMAQI
16th Nov 2025123 AMAQI
16th Nov 2025204 AMAQI
16th Nov 2025125 AMAQI
3°C-1/7°C
16th Nov 2025166 AMAQI
16th Nov 2025267 AMAQI
16th Nov 2025418 AMAQI
16th Nov 2025449 AMAQI
16th Nov 20254010 AMAQI
16th Nov 20253911 AMAQI
16th Nov 20251712 PMAQI
16th Nov 2025111 PMAQI
16th Nov 2025142 PMAQI
16th Nov 2025163 PMAQI
16th Nov 2025204 PMAQI
16th Nov 2025185 PMAQI
16th Nov 2025176 PMAQI
16th Nov 2025127 PMAQI
16th Nov 2025118 PMAQI
16th Nov 2025119 PMAQI
16th Nov 20251110 PMAQI
16th Nov 20251611 PMAQI
17th Nov 20251412 AMAQI
17th Nov 2025211 AMAQI
17th Nov 2025132 AMAQI
17th Nov 2025203 AMAQI
17th Nov 2025224 AMAQI
17th Nov 2025195 AMAQI
6°C0/10°C
17th Nov 2025196 AMAQI
17th Nov 2025107 AMAQI
17th Nov 202588 AMAQI
17th Nov 2025129 AMAQI
17th Nov 20251110 AMAQI
17th Nov 20251311 AMAQI
17th Nov 20251312 PMAQI
17th Nov 2025121 PMAQI
17th Nov 2025112 PMAQI
17th Nov 2025113 PMAQI
17th Nov 2025114 PMAQI
17th Nov 2025115 PMAQI
17th Nov 2025116 PMAQI
17th Nov 2025117 PMAQI
17th Nov 2025118 PMAQI
17th Nov 2025119 PMAQI
17th Nov 20251110 PMAQI
17th Nov 20251111 PMAQI
18th Nov 20251112 AMAQI
18th Nov 2025111 AMAQI
18th Nov 2025112 AMAQI
18th Nov 2025113 AMAQI
18th Nov 2025114 AMAQI
18th Nov 2025115 AMAQI
1°C-1/5°C
18th Nov 2025116 AMAQI
18th Nov 2025117 AMAQI
18th Nov 2025118 AMAQI
18th Nov 2025169 AMAQI
18th Nov 20251310 AMAQI
18th Nov 20251111 AMAQI
18th Nov 20251612 PMAQI
18th Nov 2025171 PMAQI
18th Nov 2025122 PMAQI
18th Nov 2025113 PMAQI
18th Nov 2025164 PMAQI
18th Nov 2025175 PMAQI
18th Nov 2025176 PMAQI
18th Nov 2025177 PMAQI
18th Nov 2025178 PMAQI
18th Nov 2025179 PMAQI
18th Nov 20251710 PMAQI
18th Nov 20251711 PMAQI
19th Nov 20251712 AMAQI
19th Nov 2025201 AMAQI
19th Nov 2025182 AMAQI
19th Nov 2025173 AMAQI
19th Nov 2025174 AMAQI
19th Nov 2025175 AMAQI
3°C-1/10°C
19th Nov 2025176 AMAQI
19th Nov 2025177 AMAQI
19th Nov 2025228 AMAQI
19th Nov 2025229 AMAQI
19th Nov 20252210 AMAQI
19th Nov 20252211 AMAQI
19th Nov 20251812 PMAQI
19th Nov 2025211 PMAQI
19th Nov 2025222 PMAQI
19th Nov 2025223 PMAQI
19th Nov 2025224 PMAQI
19th Nov 2025225 PMAQI
19th Nov 2025236 PMAQI
19th Nov 2025837 PMAQI
19th Nov 2025318 PMAQI
19th Nov 2025219 PMAQI
19th Nov 20252710 PMAQI
19th Nov 20252811 PMAQI
20th Nov 20253712 AMAQI
20th Nov 2025391 AMAQI
20th Nov 2025392 AMAQI
20th Nov 2025343 AMAQI
20th Nov 2025284 AMAQI
20th Nov 2025325 AMAQI
2°C-2/8°C
20th Nov 2025336 AMAQI
6 AM20th Nov 2025337 AMAQI
20th Nov 2025338 AMAQI
20th Nov 2025339 AMAQI
20th Nov 20253310 AMAQI
20th Nov 20253311 AMAQI
11 AM20th Nov 20253312 PMAQI
20th Nov 2025291 PMAQI
20th Nov 2025232 PMAQI
20th Nov 2025763 PMAQI
20th Nov 2025484 PMAQI
4 PM20th Nov 2025845 PMAQI
20th Nov 2025366 PMAQI
20th Nov 2025247 PMAQI
11 PM
5 AM
1°C-3/6°C
Day time
Avg. Highest Time
3 PM - 4 PM
20AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
7 AM
16AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 3 PM to 4 PM (Avg. 20), while the lowest AQI was between 7 AM to 7 AM (Avg. 16).
Night time
Avg. Highest Time
12 AM
21AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
5 AM
16AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 12 AM (Avg. 21), while the lowest AQI was between 5 AM to 5 AM (Avg. 16).
2025 Days Vs Air Quality
Milton Blue Hill Observatory, Milton, Massachusetts, United States
2025
91%
294
9%
29
Total number of days with different AQI categories in last 325 days in 2025 (40 days remaining)
Good
294 DaysModerate
29 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2025, 91% of 325 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Milton Blue Hill Observatory, Milton, Massachusetts, United States
AQI levels in 2025
AQI
PM2.5
PM10
CO
SO2
NO2
O3
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
26AQI
26AQI
2nd January 2025
24AQI
24AQI
3rd January 2025
23AQI
23AQI
4th January 2025
27AQI
27AQI
5th January 2025
27AQI
27AQI
6th January 2025
24AQI
24AQI
7th January 2025
23AQI
23AQI
8th January 2025
25AQI
25AQI
9th January 2025
26AQI
26AQI
10th January 2025
27AQI
27AQI
11th January 2025
26AQI
26AQI
12th January 2025
31AQI
31AQI
13th January 2025
48AQI
48AQI
14th January 2025
28AQI
28AQI
15th January 2025
27AQI
27AQI
16th January 2025
31AQI
31AQI
17th January 2025
54AQI
54AQI
18th January 2025
43AQI
43AQI
19th January 2025
28AQI
28AQI
20th January 2025
26AQI
26AQI
21st January 2025
37AQI
37AQI
22nd January 2025
45AQI
45AQI
23rd January 2025
45AQI
45AQI
24th January 2025
50AQI
50AQI
25th January 2025
41AQI
41AQI
26th January 2025
42AQI
42AQI
27th January 2025
28AQI
28AQI
28th January 2025
30AQI
30AQI
29th January 2025
29AQI
29AQI
30th January 2025
31AQI
31AQI
31st January 2025
36AQI
36AQI
1st February 2025
28AQI
28AQI
2nd February 2025
27AQI
27AQI
3rd February 2025
37AQI
37AQI
4th February 2025
29AQI
29AQI
5th February 2025
26AQI
26AQI
6th February 2025
34AQI
34AQI
7th February 2025
33AQI
33AQI
8th February 2025
32AQI
32AQI
9th February 2025
30AQI
30AQI
10th February 2025
28AQI
28AQI
11th February 2025
39AQI
39AQI
12th February 2025
38AQI
38AQI
13th February 2025
28AQI
28AQI
14th February 2025
29AQI
29AQI
15th February 2025
30AQI
30AQI
16th February 2025
29AQI
29AQI
17th February 2025
30AQI
30AQI
18th February 2025
29AQI
29AQI
19th February 2025
26AQI
26AQI
20th February 2025
23AQI
23AQI
21st February 2025
27AQI
27AQI
22nd February 2025
31AQI
31AQI
23rd February 2025
39AQI
39AQI
24th February 2025
46AQI
46AQI
25th February 2025
42AQI
42AQI
26th February 2025
33AQI
33AQI
27th February 2025
39AQI
39AQI
28th February 2025
31AQI
31AQI
1st March 2025
31AQI
31AQI
2nd March 2025
30AQI
30AQI
3rd March 2025
28AQI
28AQI
4th March 2025
35AQI
35AQI
5th March 2025
33AQI
33AQI
6th March 2025
28AQI
28AQI
7th March 2025
32AQI
32AQI
8th March 2025
33AQI
33AQI
9th March 2025
33AQI
33AQI
10th March 2025
31AQI
31AQI
11th March 2025
36AQI
36AQI
12th March 2025
31AQI
31AQI
13th March 2025
23AQI
23AQI
14th March 2025
27AQI
27AQI
15th March 2025
27AQI
27AQI
16th March 2025
31AQI
31AQI
17th March 2025
18AQI
18AQI
18th March 2025
17AQI
17AQI
19th March 2025
21AQI
21AQI
20th March 2025
18AQI
18AQI
21st March 2025
14AQI
14AQI
22nd March 2025
18AQI
18AQI
23rd March 2025
17AQI
17AQI
24th March 2025
21AQI
21AQI
25th March 2025
24AQI
24AQI
26th March 2025
22AQI
22AQI
27th March 2025
17AQI
17AQI
28th March 2025
22AQI
22AQI
29th March 2025
21AQI
21AQI
30th March 2025
21AQI
21AQI
31st March 2025
29AQI
29AQI
1st April 2025
16AQI
16AQI
2nd April 2025
17AQI
17AQI
3rd April 2025
20AQI
20AQI
4th April 2025
22AQI
22AQI
5th April 2025
21AQI
21AQI
6th April 2025
16AQI
16AQI
7th April 2025
15AQI
15AQI
8th April 2025
13AQI
13AQI
9th April 2025
15AQI
15AQI
10th April 2025
24AQI
24AQI
11th April 2025
20AQI
20AQI
12th April 2025
16AQI
16AQI
13th April 2025
17AQI
17AQI
14th April 2025
20AQI
20AQI
15th April 2025
23AQI
23AQI
16th April 2025
10AQI
10AQI
17th April 2025
15AQI
15AQI
18th April 2025
21AQI
21AQI
19th April 2025
44AQI
44AQI
20th April 2025
20AQI
20AQI
21st April 2025
15AQI
15AQI
22nd April 2025
35AQI
35AQI
23rd April 2025
24AQI
24AQI
24th April 2025
23AQI
23AQI
25th April 2025
51AQI
51AQI
26th April 2025
27AQI
27AQI
27th April 2025
13AQI
13AQI
28th April 2025
16AQI
16AQI
29th April 2025
25AQI
25AQI
30th April 2025
19AQI
19AQI
1st May 2025
16AQI
16AQI
2nd May 2025
35AQI
35AQI
3rd May 2025
39AQI
39AQI
4th May 2025
31AQI
31AQI
5th May 2025
21AQI
21AQI
6th May 2025
25AQI
25AQI
7th May 2025
24AQI
24AQI
8th May 2025
21AQI
21AQI
9th May 2025
27AQI
27AQI
10th May 2025
14AQI
14AQI
11th May 2025
18AQI
18AQI
12th May 2025
21AQI
21AQI
13th May 2025
27AQI
27AQI
14th May 2025
27AQI
27AQI
15th May 2025
31AQI
31AQI
16th May 2025
31AQI
31AQI
17th May 2025
32AQI
32AQI
18th May 2025
17AQI
17AQI
19th May 2025
13AQI
13AQI
20th May 2025
13AQI
13AQI
21st May 2025
15AQI
15AQI
22nd May 2025
19AQI
19AQI
23rd May 2025
16AQI
16AQI
24th May 2025
13AQI
13AQI
25th May 2025
14AQI
14AQI
26th May 2025
18AQI
18AQI
27th May 2025
23AQI
23AQI
28th May 2025
24AQI
24AQI
29th May 2025
19AQI
19AQI
30th May 2025
29AQI
29AQI
31st May 2025
19AQI
19AQI
1st June 2025
12AQI
12AQI
2nd June 2025
16AQI
16AQI
3rd June 2025
22AQI
22AQI
4th June 2025
42AQI
42AQI
5th June 2025
60AQI
60AQI
6th June 2025
61AQI
61AQI
7th June 2025
55AQI
55AQI
8th June 2025
88AQI
88AQI
9th June 2025
80AQI
80AQI
10th June 2025
59AQI
59AQI
11th June 2025
50AQI
50AQI
12th June 2025
66AQI
66AQI
13th June 2025
52AQI
52AQI
14th June 2025
45AQI
45AQI
15th June 2025
32AQI
32AQI
16th June 2025
32AQI
32AQI
17th June 2025
27AQI
27AQI
18th June 2025
22AQI
22AQI
19th June 2025
23AQI
23AQI
20th June 2025
28AQI
28AQI
21st June 2025
45AQI
45AQI
22nd June 2025
47AQI
47AQI
23rd June 2025
48AQI
48AQI
24th June 2025
53AQI
53AQI
25th June 2025
49AQI
49AQI
26th June 2025
40AQI
40AQI
27th June 2025
29AQI
29AQI
28th June 2025
23AQI
23AQI
29th June 2025
34AQI
34AQI
30th June 2025
33AQI
33AQI
1st July 2025
34AQI
34AQI
2nd July 2025
30AQI
30AQI
3rd July 2025
42AQI
42AQI
4th July 2025
44AQI
44AQI
5th July 2025
52AQI
52AQI
6th July 2025
54AQI
54AQI
7th July 2025
44AQI
44AQI
8th July 2025
35AQI
35AQI
9th July 2025
30AQI
30AQI
10th July 2025
30AQI
30AQI
11th July 2025
32AQI
32AQI
12th July 2025
33AQI
33AQI
13th July 2025
26AQI
26AQI
14th July 2025
24AQI
24AQI
15th July 2025
30AQI
30AQI
16th July 2025
39AQI
39AQI
17th July 2025
35AQI
35AQI
18th July 2025
20AQI
20AQI
19th July 2025
22AQI
22AQI
20th July 2025
19AQI
19AQI
21st July 2025
27AQI
27AQI
22nd July 2025
18AQI
18AQI
23rd July 2025
21AQI
21AQI
24th July 2025
25AQI
25AQI
25th July 2025
34AQI
34AQI
26th July 2025
67AQI
67AQI
27th July 2025
78AQI
78AQI
28th July 2025
67AQI
67AQI
29th July 2025
57AQI
57AQI
30th July 2025
45AQI
45AQI
31st July 2025
64AQI
64AQI
1st August 2025
48AQI
48AQI
2nd August 2025
33AQI
33AQI
3rd August 2025
62AQI
62AQI
4th August 2025
85AQI
85AQI
5th August 2025
89AQI
89AQI
6th August 2025
56AQI
56AQI
7th August 2025
64AQI
64AQI
8th August 2025
42AQI
42AQI
9th August 2025
37AQI
37AQI
10th August 2025
36AQI
36AQI
11th August 2025
54AQI
54AQI
12th August 2025
57AQI
57AQI
13th August 2025
49AQI
49AQI
14th August 2025
43AQI
43AQI
15th August 2025
57AQI
57AQI
16th August 2025
53AQI
53AQI
17th August 2025
52AQI
52AQI
18th August 2025
16AQI
16AQI
19th August 2025
19AQI
19AQI
20th August 2025
16AQI
16AQI
21st August 2025
17AQI
17AQI
22nd August 2025
24AQI
24AQI
23rd August 2025
30AQI
30AQI
24th August 2025
26AQI
26AQI
25th August 2025
25AQI
25AQI
26th August 2025
17AQI
17AQI
27th August 2025
17AQI
17AQI
28th August 2025
20AQI
20AQI
29th August 2025
21AQI
21AQI
30th August 2025
17AQI
17AQI
31st August 2025
21AQI
21AQI
1st September 2025
25AQI
25AQI
2nd September 2025
26AQI
26AQI
3rd September 2025
28AQI
28AQI
4th September 2025
24AQI
24AQI
5th September 2025
30AQI
30AQI
6th September 2025
43AQI
43AQI
7th September 2025
32AQI
32AQI
8th September 2025
23AQI
23AQI
9th September 2025
21AQI
21AQI
10th September 2025
23AQI
23AQI
11th September 2025
27AQI
27AQI
12th September 2025
32AQI
32AQI
13th September 2025
34AQI
34AQI
14th September 2025
40AQI
40AQI
15th September 2025
43AQI
43AQI
16th September 2025
34AQI
34AQI
17th September 2025
26AQI
26AQI
18th September 2025
21AQI
21AQI
19th September 2025
25AQI
25AQI
20th September 2025
18AQI
18AQI
21st September 2025
20AQI
20AQI
22nd September 2025
19AQI
19AQI
23rd September 2025
22AQI
22AQI
24th September 2025
25AQI
25AQI
25th September 2025
21AQI
21AQI
26th September 2025
25AQI
25AQI
27th September 2025
19AQI
19AQI
28th September 2025
22AQI
22AQI
29th September 2025
24AQI
24AQI
30th September 2025
22AQI
22AQI
1st October 2025
40AQI
40AQI
2nd October 2025
17AQI
17AQI
3rd October 2025
26AQI
26AQI
4th October 2025
40AQI
40AQI
5th October 2025
50AQI
50AQI
6th October 2025
55AQI
55AQI
7th October 2025
35AQI
35AQI
8th October 2025
11AQI
11AQI
9th October 2025
13AQI
13AQI
10th October 2025
14AQI
14AQI
11th October 2025
19AQI
19AQI
12th October 2025
32AQI
32AQI
13th October 2025
43AQI
43AQI
14th October 2025
23AQI
23AQI
15th October 2025
17AQI
17AQI
16th October 2025
20AQI
20AQI
17th October 2025
23AQI
23AQI
18th October 2025
37AQI
37AQI
19th October 2025
34AQI
34AQI
20th October 2025
24AQI
24AQI
21st October 2025
20AQI
20AQI
22nd October 2025
20AQI
20AQI
23rd October 2025
16AQI
16AQI
24th October 2025
15AQI
15AQI
25th October 2025
17AQI
17AQI
26th October 2025
23AQI
23AQI
27th October 2025
18AQI
18AQI
28th October 2025
13AQI
13AQI
29th October 2025
14AQI
14AQI
30th October 2025
19AQI
19AQI
31st October 2025
15AQI
15AQI
1st November 2025
13AQI
13AQI
2nd November 2025
16AQI
16AQI
3rd November 2025
25AQI
25AQI
4th November 2025
13AQI
13AQI
5th November 2025
19AQI
19AQI
6th November 2025
17AQI
17AQI
7th November 2025
12AQI
12AQI
8th November 2025
22AQI
22AQI
9th November 2025
31AQI
31AQI
10th November 2025
29AQI
29AQI
11th November 2025
11AQI
11AQI
12th November 2025
19AQI
19AQI
13th November 2025
20AQI
20AQI
14th November 2025
15AQI
15AQI
15th November 2025
20AQI
20AQI
16th November 2025
19AQI
19AQI
17th November 2025
14AQI
14AQI
18th November 2025
14AQI
14AQI
19th November 2025
24AQI
24AQI
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025
33AQI
32AQI
25AQI
21AQI
22AQI
42AQI
38AQI
39AQI
26AQI
25AQI
19AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202530AQI
30
1
28
31
29
1
31
21
9
24
7
21
10
30
30
1
19
294
29
Highest AQI recorded in
June42AQI
Lowest AQI recorded in
November19AQI
202432AQI
29
2
29
31
30
31
29
1
27
4
23
8
30
31
30
29
2
349
17
Highest AQI recorded in
August39AQI
Lowest AQI recorded in
November25AQI
202335AQI
31
28
30
1
27
3
31
21
9
21
10
26
5
23
7
29
2
28
1
30
1
325
39
Highest AQI recorded in
July45AQI
Lowest AQI recorded in
November29AQI
202233AQI
24
7
20
1
27
4
17
30
1
30
22
1
1
27
2
31
30
25
3
284
19
Highest AQI recorded in
January38AQI
Lowest AQI recorded in
August28AQI
202130AQI
28
2
28
31
30
31
28
1
26
5
30
1
25
30
22
2
22
3
331
14
Highest AQI recorded in
December33AQI
Lowest AQI recorded in
September23AQI
202030AQI
2
21
18
30
30
1
30
1
28
2
31
27
3
27
4
244
11
Highest AQI recorded in
August36AQI
Lowest AQI recorded in
May27AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
35AQILeast Polluted Year Recorded
2025(Avg.)
30AQIMilton Blue Hill Observatory's annual 2025 AQI (30) shows an average percentage change of -7.1% (improved AQI) compared to previous years: 2020 (30), 2021 (30), 2022 (33), 2023 (35), 2024 (32).
