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+
August 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
5th Aug 2025
89AQILowest AQI recorded on
19th Aug 2021
18AQISame Day Analysis (7th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 65 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 7th Aug - 8th Aug 2025
Milton Blue Hill Observatory, Milton, Massachusetts, United States
AQI
Day
Night
.
5 AM7th Aug 2025
8 PM
4 AM8th Aug 2025
Day time
Avg. Highest Time
10AM7th Aug
68AQI
Avg. Lowest Time
1PM7th Aug
55AQI
Night time
Avg. Highest Time
8PM7th Aug
62AQI
Avg. Lowest Time
4AM8th Aug
32AQI
In the last 24 hours,
Milton Blue Hill Observatory's AQI reached its highest point of 68 at 10 AM during the Day, while the lowest point, 32, was recorded at 4 AM during the Night between 7th Aug and 8th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Milton Blue Hill Observatory, Milton, Massachusetts, United States
JulAug
09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th
Day
Night
9th Jul 2025245 AMAQI
9th Jul 2025266 AMAQI
9th Jul 2025277 AMAQI
9th Jul 2025308 AMAQI
9th Jul 2025289 AMAQI
9th Jul 20252610 AMAQI
9th Jul 20252511 AMAQI
9th Jul 20252612 PMAQI
9th Jul 2025261 PMAQI
9th Jul 2025282 PMAQI
9th Jul 2025303 PMAQI
9th Jul 2025324 PMAQI
9th Jul 2025335 PMAQI
9th Jul 2025346 PMAQI
9th Jul 2025327 PMAQI
9th Jul 2025308 PMAQI
9th Jul 2025309 PMAQI
9th Jul 20253210 PMAQI
9th Jul 20253211 PMAQI
10th Jul 20253212 AMAQI
10th Jul 2025331 AMAQI
10th Jul 2025332 AMAQI
10th Jul 2025323 AMAQI
10th Jul 2025304 AMAQI
23°C20/28°C
10th Jul 2025285 AMAQI
10th Jul 2025306 AMAQI
10th Jul 2025297 AMAQI
10th Jul 2025268 AMAQI
10th Jul 2025279 AMAQI
10th Jul 20252710 AMAQI
10th Jul 20252911 AMAQI
10th Jul 20252812 PMAQI
10th Jul 2025291 PMAQI
10th Jul 2025312 PMAQI
10th Jul 2025333 PMAQI
10th Jul 2025314 PMAQI
10th Jul 2025295 PMAQI
10th Jul 2025306 PMAQI
10th Jul 2025317 PMAQI
10th Jul 2025298 PMAQI
10th Jul 2025319 PMAQI
10th Jul 20253010 PMAQI
10th Jul 20253111 PMAQI
11th Jul 20253112 AMAQI
11th Jul 2025321 AMAQI
11th Jul 2025292 AMAQI
11th Jul 2025283 AMAQI
11th Jul 2025284 AMAQI
21°C19/24°C
11th Jul 2025305 AMAQI
11th Jul 2025326 AMAQI
11th Jul 2025337 AMAQI
11th Jul 2025348 AMAQI
11th Jul 2025339 AMAQI
11th Jul 20253610 AMAQI
11th Jul 20253211 AMAQI
11th Jul 20253012 PMAQI
11th Jul 2025301 PMAQI
11th Jul 2025312 PMAQI
11th Jul 2025333 PMAQI
11th Jul 2025344 PMAQI
11th Jul 2025335 PMAQI
11th Jul 2025346 PMAQI
11th Jul 2025327 PMAQI
11th Jul 2025348 PMAQI
11th Jul 2025349 PMAQI
11th Jul 20253310 PMAQI
11th Jul 20253411 PMAQI
12th Jul 20253512 AMAQI
12th Jul 2025341 AMAQI
12th Jul 2025292 AMAQI
12th Jul 2025303 AMAQI
12th Jul 2025304 AMAQI
22°C19/27°C
12th Jul 2025325 AMAQI
12th Jul 2025326 AMAQI
12th Jul 2025327 AMAQI
12th Jul 2025328 AMAQI
12th Jul 2025309 AMAQI
12th Jul 20253210 AMAQI
12th Jul 20253211 AMAQI
12th Jul 20253212 PMAQI
12th Jul 2025321 PMAQI
12th Jul 2025332 PMAQI
12th Jul 2025343 PMAQI
12th Jul 2025364 PMAQI
12th Jul 2025345 PMAQI
12th Jul 2025356 PMAQI
12th Jul 2025347 PMAQI
12th Jul 2025358 PMAQI
12th Jul 2025339 PMAQI
12th Jul 20253210 PMAQI
12th Jul 20253511 PMAQI
13th Jul 20253412 AMAQI
13th Jul 2025341 AMAQI
13th Jul 2025282 AMAQI
13th Jul 2025263 AMAQI
13th Jul 2025204 AMAQI
23°C21/30°C
13th Jul 2025195 AMAQI
13th Jul 2025206 AMAQI
13th Jul 2025237 AMAQI
13th Jul 2025228 AMAQI
13th Jul 2025229 AMAQI
13th Jul 20252210 AMAQI
13th Jul 20252311 AMAQI
13th Jul 20252412 PMAQI
13th Jul 2025241 PMAQI
13th Jul 2025262 PMAQI
13th Jul 2025273 PMAQI
13th Jul 2025274 PMAQI
13th Jul 2025275 PMAQI
13th Jul 2025276 PMAQI
13th Jul 2025277 PMAQI
13th Jul 2025268 PMAQI
13th Jul 2025289 PMAQI
13th Jul 20252810 PMAQI
13th Jul 20252811 PMAQI
14th Jul 20252612 AMAQI
14th Jul 2025261 AMAQI
14th Jul 2025222 AMAQI
14th Jul 2025213 AMAQI
14th Jul 2025214 AMAQI
22°C19/26°C
14th Jul 2025225 AMAQI
14th Jul 2025226 AMAQI
14th Jul 2025237 AMAQI
14th Jul 2025238 AMAQI
14th Jul 2025239 AMAQI
14th Jul 20252310 AMAQI
14th Jul 20252311 AMAQI
14th Jul 20252412 PMAQI
14th Jul 2025231 PMAQI
14th Jul 2025262 PMAQI
14th Jul 2025263 PMAQI
14th Jul 2025254 PMAQI
14th Jul 2025265 PMAQI
14th Jul 2025266 PMAQI
14th Jul 2025267 PMAQI
14th Jul 2025258 PMAQI
14th Jul 2025269 PMAQI
14th Jul 20252510 PMAQI
14th Jul 20252411 PMAQI
15th Jul 20252612 AMAQI
15th Jul 2025261 AMAQI
15th Jul 2025252 AMAQI
15th Jul 2025243 AMAQI
15th Jul 2025244 AMAQI
22°C20/26°C
15th Jul 2025245 AMAQI
15th Jul 2025246 AMAQI
15th Jul 2025257 AMAQI
15th Jul 2025248 AMAQI
15th Jul 2025289 AMAQI
15th Jul 20252910 AMAQI
15th Jul 20253211 AMAQI
15th Jul 20253812 PMAQI
15th Jul 2025351 PMAQI
15th Jul 2025382 PMAQI
15th Jul 2025333 PMAQI
15th Jul 2025384 PMAQI
15th Jul 2025375 PMAQI
15th Jul 2025326 PMAQI
15th Jul 2025307 PMAQI
15th Jul 2025308 PMAQI
15th Jul 2025329 PMAQI
15th Jul 20253210 PMAQI
15th Jul 20253411 PMAQI
16th Jul 20253412 AMAQI
16th Jul 2025391 AMAQI
16th Jul 2025362 AMAQI
16th Jul 2025343 AMAQI
16th Jul 2025324 AMAQI
27°C23/34°C
16th Jul 2025305 AMAQI
16th Jul 2025346 AMAQI
16th Jul 2025387 AMAQI
16th Jul 2025408 AMAQI
16th Jul 2025419 AMAQI
16th Jul 20254210 AMAQI
16th Jul 20254811 AMAQI
16th Jul 20254512 PMAQI
16th Jul 2025411 PMAQI
16th Jul 2025402 PMAQI
16th Jul 2025403 PMAQI
16th Jul 2025404 PMAQI
16th Jul 2025425 PMAQI
16th Jul 2025406 PMAQI
16th Jul 2025427 PMAQI
16th Jul 2025438 PMAQI
16th Jul 2025419 PMAQI
16th Jul 20254410 PMAQI
16th Jul 20254211 PMAQI
17th Jul 20254112 AMAQI
17th Jul 2025391 AMAQI
17th Jul 2025332 AMAQI
17th Jul 2025323 AMAQI
17th Jul 2025324 AMAQI
28°C23/35°C
17th Jul 2025325 AMAQI
17th Jul 2025336 AMAQI
17th Jul 2025367 AMAQI
17th Jul 2025358 AMAQI
17th Jul 2025389 AMAQI
17th Jul 20254110 AMAQI
17th Jul 20253611 AMAQI
17th Jul 20253612 PMAQI
17th Jul 2025331 PMAQI
17th Jul 2025322 PMAQI
17th Jul 2025353 PMAQI
17th Jul 2025354 PMAQI
17th Jul 2025345 PMAQI
17th Jul 2025336 PMAQI
17th Jul 2025357 PMAQI
17th Jul 2025348 PMAQI
17th Jul 2025349 PMAQI
17th Jul 20253210 PMAQI
17th Jul 20253311 PMAQI
18th Jul 20253212 AMAQI
18th Jul 2025321 AMAQI
18th Jul 2025272 AMAQI
18th Jul 2025223 AMAQI
18th Jul 2025154 AMAQI
26°C25/30°C
18th Jul 2025145 AMAQI
18th Jul 2025166 AMAQI
18th Jul 2025187 AMAQI
18th Jul 2025198 AMAQI
18th Jul 2025179 AMAQI
18th Jul 20251610 AMAQI
18th Jul 20251711 AMAQI
18th Jul 20251612 PMAQI
18th Jul 2025161 PMAQI
18th Jul 2025182 PMAQI
18th Jul 2025193 PMAQI
18th Jul 2025184 PMAQI
18th Jul 2025205 PMAQI
18th Jul 2025196 PMAQI
18th Jul 2025197 PMAQI
18th Jul 2025198 PMAQI
18th Jul 2025209 PMAQI
18th Jul 20252010 PMAQI
18th Jul 20252211 PMAQI
19th Jul 20252012 AMAQI
19th Jul 2025201 AMAQI
19th Jul 2025222 AMAQI
19th Jul 2025223 AMAQI
19th Jul 2025204 AMAQI
25°C20/28°C
19th Jul 2025215 AMAQI
19th Jul 2025226 AMAQI
19th Jul 2025237 AMAQI
19th Jul 2025238 AMAQI
19th Jul 2025229 AMAQI
19th Jul 20252210 AMAQI
19th Jul 20252011 AMAQI
19th Jul 20252112 PMAQI
19th Jul 2025221 PMAQI
19th Jul 2025232 PMAQI
19th Jul 2025233 PMAQI
19th Jul 2025234 PMAQI
19th Jul 2025225 PMAQI
19th Jul 2025226 PMAQI
19th Jul 2025227 PMAQI
19th Jul 2025228 PMAQI
19th Jul 2025239 PMAQI
19th Jul 20252210 PMAQI
19th Jul 20252311 PMAQI
20th Jul 20252312 AMAQI
20th Jul 2025221 AMAQI
20th Jul 2025182 AMAQI
20th Jul 2025163 AMAQI
20th Jul 2025164 AMAQI
24°C16/31°C
20th Jul 2025165 AMAQI
20th Jul 2025176 AMAQI
20th Jul 2025187 AMAQI
20th Jul 2025208 AMAQI
20th Jul 2025199 AMAQI
20th Jul 20251910 AMAQI
20th Jul 20251911 AMAQI
20th Jul 20251812 PMAQI
20th Jul 2025181 PMAQI
20th Jul 2025192 PMAQI
20th Jul 2025213 PMAQI
20th Jul 2025214 PMAQI
20th Jul 2025205 PMAQI
20th Jul 2025206 PMAQI
20th Jul 2025217 PMAQI
20th Jul 2025208 PMAQI
20th Jul 2025229 PMAQI
20th Jul 20252210 PMAQI
20th Jul 20252211 PMAQI
21st Jul 20252212 AMAQI
21st Jul 2025211 AMAQI
21st Jul 2025202 AMAQI
21st Jul 2025183 AMAQI
21st Jul 2025174 AMAQI
25°C20/31°C
21st Jul 2025195 AMAQI
21st Jul 2025216 AMAQI
21st Jul 2025267 AMAQI
21st Jul 2025298 AMAQI
21st Jul 2025369 AMAQI
21st Jul 20254510 AMAQI
21st Jul 20254811 AMAQI
21st Jul 20255112 PMAQI
21st Jul 2025481 PMAQI
21st Jul 2025402 PMAQI
21st Jul 2025343 PMAQI
21st Jul 2025324 PMAQI
21st Jul 2025255 PMAQI
21st Jul 2025246 PMAQI
21st Jul 2025237 PMAQI
21st Jul 2025238 PMAQI
21st Jul 2025229 PMAQI
21st Jul 20252410 PMAQI
21st Jul 20252411 PMAQI
22nd Jul 20252412 AMAQI
22nd Jul 2025241 AMAQI
22nd Jul 2025172 AMAQI
22nd Jul 2025163 AMAQI
22nd Jul 2025144 AMAQI
23°C19/27°C
22nd Jul 2025145 AMAQI
22nd Jul 2025156 AMAQI
22nd Jul 2025177 AMAQI
22nd Jul 2025178 AMAQI
22nd Jul 2025179 AMAQI
22nd Jul 20251710 AMAQI
22nd Jul 20251711 AMAQI
22nd Jul 20251812 PMAQI
22nd Jul 2025171 PMAQI
22nd Jul 2025182 PMAQI
22nd Jul 2025193 PMAQI
22nd Jul 2025194 PMAQI
22nd Jul 2025185 PMAQI
22nd Jul 2025186 PMAQI
22nd Jul 2025197 PMAQI
22nd Jul 2025198 PMAQI
22nd Jul 2025209 PMAQI
22nd Jul 20251910 PMAQI
22nd Jul 20252011 PMAQI
23rd Jul 20252012 AMAQI
23rd Jul 2025201 AMAQI
23rd Jul 2025182 AMAQI
23rd Jul 2025183 AMAQI
23rd Jul 2025184 AMAQI
21°C15/25°C
23rd Jul 2025175 AMAQI
23rd Jul 2025186 AMAQI
23rd Jul 2025187 AMAQI
23rd Jul 2025188 AMAQI
23rd Jul 2025199 AMAQI
23rd Jul 20252210 AMAQI
23rd Jul 20252211 AMAQI
23rd Jul 20252312 PMAQI
23rd Jul 2025251 PMAQI
23rd Jul 2025232 PMAQI
23rd Jul 2025213 PMAQI
23rd Jul 2025224 PMAQI
23rd Jul 2025215 PMAQI
23rd Jul 2025216 PMAQI
23rd Jul 2025227 PMAQI
23rd Jul 2025228 PMAQI
23rd Jul 2025219 PMAQI
23rd Jul 20252210 PMAQI
23rd Jul 20252211 PMAQI
24th Jul 20252212 AMAQI
24th Jul 2025221 AMAQI
24th Jul 2025182 AMAQI
24th Jul 2025183 AMAQI
24th Jul 2025184 AMAQI
24°C19/27°C
24th Jul 2025185 AMAQI
24th Jul 2025216 AMAQI
24th Jul 2025207 AMAQI
24th Jul 2025228 AMAQI
24th Jul 2025249 AMAQI
24th Jul 20252510 AMAQI
24th Jul 20252911 AMAQI
24th Jul 20253212 PMAQI
24th Jul 2025341 PMAQI
24th Jul 2025322 PMAQI
24th Jul 2025313 PMAQI
24th Jul 2025314 PMAQI
24th Jul 2025305 PMAQI
24th Jul 2025306 PMAQI
24th Jul 2025277 PMAQI
24th Jul 2025278 PMAQI
24th Jul 2025309 PMAQI
24th Jul 20252810 PMAQI
24th Jul 20252811 PMAQI
25th Jul 20253012 AMAQI
25th Jul 2025281 AMAQI
25th Jul 2025282 AMAQI
25th Jul 2025263 AMAQI
25th Jul 2025284 AMAQI
26°C20/32°C
25th Jul 2025305 AMAQI
25th Jul 2025336 AMAQI
25th Jul 2025347 AMAQI
25th Jul 2025368 AMAQI
25th Jul 2025369 AMAQI
25th Jul 20253810 AMAQI
25th Jul 20253811 AMAQI
25th Jul 20254312 PMAQI
25th Jul 2025421 PMAQI
25th Jul 2025402 PMAQI
25th Jul 2025393 PMAQI
25th Jul 2025374 PMAQI
25th Jul 2025345 PMAQI
25th Jul 2025346 PMAQI
25th Jul 2025357 PMAQI
25th Jul 2025328 PMAQI
25th Jul 2025329 PMAQI
25th Jul 20253410 PMAQI
25th Jul 20253611 PMAQI
26th Jul 20253712 AMAQI
26th Jul 2025381 AMAQI
26th Jul 2025352 AMAQI
26th Jul 2025423 AMAQI
26th Jul 2025614 AMAQI
28°C23/37°C
26th Jul 2025665 AMAQI
26th Jul 2025906 AMAQI
26th Jul 2025957 AMAQI
26th Jul 20251028 AMAQI
26th Jul 20251139 AMAQI
26th Jul 20259910 AMAQI
26th Jul 20259211 AMAQI
26th Jul 20258412 PMAQI
26th Jul 2025741 PMAQI
26th Jul 2025782 PMAQI
26th Jul 2025783 PMAQI
26th Jul 2025784 PMAQI
26th Jul 2025725 PMAQI
26th Jul 2025626 PMAQI
26th Jul 2025627 PMAQI
26th Jul 2025628 PMAQI
26th Jul 2025649 PMAQI
26th Jul 20256610 PMAQI
26th Jul 20257211 PMAQI
27th Jul 20257012 AMAQI
27th Jul 2025771 AMAQI
27th Jul 2025712 AMAQI
27th Jul 2025803 AMAQI
27th Jul 2025844 AMAQI
26°C23/30°C
27th Jul 2025825 AMAQI
27th Jul 2025846 AMAQI
27th Jul 2025817 AMAQI
27th Jul 2025808 AMAQI
27th Jul 2025789 AMAQI
27th Jul 20257610 AMAQI
27th Jul 20257811 AMAQI
27th Jul 20257812 PMAQI
27th Jul 2025791 PMAQI
27th Jul 2025782 PMAQI
27th Jul 2025843 PMAQI
27th Jul 2025794 PMAQI
27th Jul 2025805 PMAQI
27th Jul 2025796 PMAQI
27th Jul 2025787 PMAQI
27th Jul 2025818 PMAQI
27th Jul 2025779 PMAQI
27th Jul 20257610 PMAQI
27th Jul 20257611 PMAQI
28th Jul 20257612 AMAQI
28th Jul 2025711 AMAQI
28th Jul 2025702 AMAQI
28th Jul 2025753 AMAQI
28th Jul 2025724 AMAQI
22°C19/25°C
28th Jul 2025725 AMAQI
28th Jul 2025686 AMAQI
28th Jul 2025667 AMAQI
28th Jul 2025648 AMAQI
28th Jul 2025679 AMAQI
28th Jul 20256510 AMAQI
28th Jul 20256511 AMAQI
28th Jul 20256312 PMAQI
28th Jul 2025611 PMAQI
28th Jul 2025622 PMAQI
28th Jul 2025643 PMAQI
28th Jul 2025644 PMAQI
28th Jul 2025645 PMAQI
28th Jul 2025646 PMAQI
28th Jul 2025637 PMAQI
28th Jul 2025628 PMAQI
28th Jul 2025649 PMAQI
28th Jul 20256210 PMAQI
28th Jul 20256211 PMAQI
29th Jul 20256312 AMAQI
29th Jul 2025631 AMAQI
29th Jul 2025542 AMAQI
29th Jul 2025563 AMAQI
29th Jul 2025564 AMAQI
26°C21/33°C
29th Jul 2025555 AMAQI
29th Jul 2025576 AMAQI
29th Jul 2025577 AMAQI
29th Jul 2025588 AMAQI
29th Jul 2025589 AMAQI
29th Jul 20255810 AMAQI
29th Jul 20255811 AMAQI
29th Jul 20255612 PMAQI
29th Jul 2025551 PMAQI
29th Jul 2025562 PMAQI
29th Jul 2025563 PMAQI
29th Jul 2025574 PMAQI
29th Jul 2025565 PMAQI
29th Jul 2025576 PMAQI
29th Jul 2025577 PMAQI
29th Jul 2025588 PMAQI
29th Jul 2025579 PMAQI
29th Jul 20255610 PMAQI
29th Jul 20255611 PMAQI
30th Jul 20255512 AMAQI
30th Jul 2025551 AMAQI
30th Jul 2025432 AMAQI
30th Jul 2025423 AMAQI
30th Jul 2025374 AMAQI
31°C24/38°C
30th Jul 2025365 AMAQI
30th Jul 2025396 AMAQI
30th Jul 2025417 AMAQI
30th Jul 2025428 AMAQI
30th Jul 2025449 AMAQI
30th Jul 20254410 AMAQI
30th Jul 20254511 AMAQI
30th Jul 20254712 PMAQI
30th Jul 2025491 PMAQI
30th Jul 2025482 PMAQI
30th Jul 2025473 PMAQI
30th Jul 2025474 PMAQI
30th Jul 2025475 PMAQI
30th Jul 2025476 PMAQI
30th Jul 2025477 PMAQI
30th Jul 2025478 PMAQI
30th Jul 2025479 PMAQI
30th Jul 20254610 PMAQI
30th Jul 20254711 PMAQI
31st Jul 20254712 AMAQI
31st Jul 2025471 AMAQI
31st Jul 2025382 AMAQI
31st Jul 2025423 AMAQI
31st Jul 2025434 AMAQI
31°C26/36°C
31st Jul 2025525 AMAQI
31st Jul 2025606 AMAQI
31st Jul 2025667 AMAQI
31st Jul 2025698 AMAQI
31st Jul 2025769 AMAQI
31st Jul 20257910 AMAQI
31st Jul 20258111 AMAQI
31st Jul 20258412 PMAQI
31st Jul 2025831 PMAQI
31st Jul 2025832 PMAQI
31st Jul 2025833 PMAQI
31st Jul 2025834 PMAQI
31st Jul 2025765 PMAQI
31st Jul 2025766 PMAQI
31st Jul 2025687 PMAQI
31st Jul 2025678 PMAQI
31st Jul 2025689 PMAQI
31st Jul 20256710 PMAQI
31st Jul 20256411 PMAQI
1st Aug 20256212 AMAQI
1st Aug 2025591 AMAQI
1st Aug 2025562 AMAQI
1st Aug 2025563 AMAQI
1st Aug 2025554 AMAQI
24°C17/27°C
1st Aug 2025565 AMAQI
1st Aug 2025576 AMAQI
1st Aug 2025587 AMAQI
1st Aug 2025588 AMAQI
1st Aug 2025589 AMAQI
1st Aug 20255510 AMAQI
1st Aug 20255211 AMAQI
1st Aug 20255212 PMAQI
1st Aug 2025531 PMAQI
1st Aug 2025502 PMAQI
1st Aug 2025393 PMAQI
1st Aug 2025374 PMAQI
1st Aug 2025345 PMAQI
1st Aug 2025316 PMAQI
1st Aug 2025577 PMAQI
1st Aug 2025408 PMAQI
1st Aug 2025269 PMAQI
1st Aug 20252610 PMAQI
1st Aug 20253411 PMAQI
2nd Aug 20253412 AMAQI
2nd Aug 2025371 AMAQI
2nd Aug 2025342 AMAQI
2nd Aug 2025293 AMAQI
2nd Aug 2025284 AMAQI
19°C15/23°C
2nd Aug 2025255 AMAQI
2nd Aug 2025256 AMAQI
2nd Aug 2025247 AMAQI
2nd Aug 2025258 AMAQI
2nd Aug 2025259 AMAQI
2nd Aug 20252510 AMAQI
2nd Aug 20252211 AMAQI
2nd Aug 20252112 PMAQI
2nd Aug 2025231 PMAQI
2nd Aug 2025262 PMAQI
2nd Aug 2025313 PMAQI
2nd Aug 2025374 PMAQI
2nd Aug 2025425 PMAQI
2nd Aug 2025416 PMAQI
2nd Aug 2025297 PMAQI
2nd Aug 2025398 PMAQI
2nd Aug 2025469 PMAQI
2nd Aug 20255210 PMAQI
2nd Aug 20255311 PMAQI
3rd Aug 20255012 AMAQI
3rd Aug 2025551 AMAQI
3rd Aug 2025542 AMAQI
3rd Aug 2025523 AMAQI
3rd Aug 2025494 AMAQI
21°C14/26°C
3rd Aug 2025475 AMAQI
3rd Aug 2025496 AMAQI
3rd Aug 2025487 AMAQI
3rd Aug 2025518 AMAQI
3rd Aug 2025549 AMAQI
3rd Aug 20255810 AMAQI
3rd Aug 20256011 AMAQI
3rd Aug 20256812 PMAQI
3rd Aug 2025741 PMAQI
3rd Aug 2025762 PMAQI
3rd Aug 2025783 PMAQI
3rd Aug 2025794 PMAQI
3rd Aug 2025805 PMAQI
3rd Aug 2025816 PMAQI
3rd Aug 2025577 PMAQI
3rd Aug 2025688 PMAQI
3rd Aug 2025799 PMAQI
3rd Aug 20257510 PMAQI
3rd Aug 20257411 PMAQI
4th Aug 20257112 AMAQI
4th Aug 2025831 AMAQI
4th Aug 2025892 AMAQI
4th Aug 2025743 AMAQI
4th Aug 2025724 AMAQI
23°C15/31°C
4th Aug 2025745 AMAQI
4th Aug 2025756 AMAQI
4th Aug 2025747 AMAQI
4th Aug 2025758 AMAQI
4th Aug 2025789 AMAQI
4th Aug 20258010 AMAQI
4th Aug 20258411 AMAQI
4th Aug 20258612 PMAQI
4th Aug 2025901 PMAQI
4th Aug 20251002 PMAQI
4th Aug 2025983 PMAQI
4th Aug 2025914 PMAQI
4th Aug 2025925 PMAQI
4th Aug 2025986 PMAQI
4th Aug 2025817 PMAQI
4th Aug 2025928 PMAQI
4th Aug 20251019 PMAQI
4th Aug 202510010 PMAQI
4th Aug 20259511 PMAQI
5th Aug 202510012 AMAQI
5th Aug 20251081 AMAQI
5th Aug 2025952 AMAQI
5th Aug 2025983 AMAQI
5th Aug 2025934 AMAQI
25°C17/33°C
5th Aug 2025945 AMAQI
5th Aug 2025956 AMAQI
5th Aug 2025967 AMAQI
5th Aug 2025988 AMAQI
5th Aug 2025949 AMAQI
5th Aug 202510110 AMAQI
5th Aug 20259911 AMAQI
5th Aug 20259912 PMAQI
5th Aug 2025941 PMAQI
5th Aug 2025902 PMAQI
5th Aug 2025923 PMAQI
5th Aug 2025854 PMAQI
5th Aug 2025845 PMAQI
5th Aug 2025786 PMAQI
5th Aug 2025967 PMAQI
5th Aug 2025818 PMAQI
5th Aug 2025659 PMAQI
5th Aug 20255810 PMAQI
5th Aug 20256011 PMAQI
6th Aug 20255812 AMAQI
6th Aug 2025541 AMAQI
6th Aug 2025492 AMAQI
6th Aug 2025493 AMAQI
6th Aug 2025484 AMAQI
21°C19/23°C
6th Aug 2025495 AMAQI
6th Aug 2025506 AMAQI
6th Aug 2025527 AMAQI
6th Aug 2025508 AMAQI
6th Aug 2025559 AMAQI
6th Aug 20255610 AMAQI
6th Aug 20256011 AMAQI
6th Aug 20256312 PMAQI
6th Aug 2025641 PMAQI
6th Aug 2025672 PMAQI
6th Aug 2025673 PMAQI
6th Aug 2025614 PMAQI
6th Aug 2025605 PMAQI
6th Aug 2025606 PMAQI
6th Aug 2025567 PMAQI
6th Aug 2025568 PMAQI
6th Aug 2025589 PMAQI
6th Aug 20255910 PMAQI
6th Aug 20256311 PMAQI
7th Aug 20255812 AMAQI
7th Aug 2025731 AMAQI
7th Aug 2025742 AMAQI
7th Aug 2025703 AMAQI
7th Aug 2025694 AMAQI
21°C19/25°C
7th Aug 2025635 AMAQI
7th Aug 2025626 AMAQI
7th Aug 2025637 AMAQI
7th Aug 2025668 AMAQI
7th Aug 2025679 AMAQI
7th Aug 20256810 AMAQI
7th Aug 20255811 AMAQI
7th Aug 20255812 PMAQI
7th Aug 2025551 PMAQI
7th Aug 2025602 PMAQI
7th Aug 2025633 PMAQI
7th Aug 2025644 PMAQI
7th Aug 2025645 PMAQI
7th Aug 2025646 PMAQI
7th Aug 2025627 PMAQI
7th Aug 2025628 PMAQI
7th Aug 2025619 PMAQI
7th Aug 20256210 PMAQI
7th Aug 20256211 PMAQI
8th Aug 20256212 AMAQI
8th Aug 2025411 AMAQI
8th Aug 2025322 AMAQI
8th Aug 2025333 AMAQI
8th Aug 2025324 AMAQI
24°C18/30°C
8th Aug 2025345 AMAQI
5 AM8th Aug 2025366 AMAQI
8th Aug 2025387 AMAQI
8th Aug 2025428 AMAQI
8th Aug 2025429 AMAQI
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
44AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM
39AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 PM (Avg. 44), while the lowest AQI was between 5 AM to 5 AM (Avg. 39).
Night time
Avg. Highest Time
12 AM - 1 AM
44AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
2 AM - 4 AM
39AQI
3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 1 AM (Avg. 44), while the lowest AQI was between 2 AM to 4 AM (Avg. 39).
2025 Days Vs Air Quality
Milton Blue Hill Observatory, Milton, Massachusetts, United States
2025
89%
196
11%
23
Total number of days with different AQI categories in last 220 days in 2025 (145 days remaining)
Good
196 DaysModerate
23 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 220 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
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.
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
65AQI
65AQI
33AQI
32AQI
25AQI
21AQI
22AQI
42AQI
38AQI
63AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202532AQI
30
1
28
31
29
1
31
21
9
24
7
2
5
196
23
Highest AQI recorded in
August63AQI
Lowest AQI recorded in
April21AQI
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
2021(Avg.)
30AQIMilton Blue Hill Observatory's annual 2025 AQI (32) shows an average percentage change of -1.2% (improved AQI) compared to previous years: 2020 (30), 2021 (30), 2022 (33), 2023 (35), 2024 (32).
