Country Background

Prospect Harbor, Maine, 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+

October Air Quality Analysis

Prospect Harbor, Maine, United States

2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
8th Oct 2025
44AQI
Lowest AQI recorded on
1st Oct 2025
14AQI


Same Day Analysis (19th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 23 of Good air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 19th Oct - 20th Oct 2025

Prospect Harbor, Maine, United States

AQI
Day
Night
.

6 AM19th Oct 2025

6 PM

5 AM20th Oct 2025

Day time
Avg. Highest Time
2PM19th Oct

31AQI

Avg. Lowest Time
8AM19th Oct

21AQI

Night time
Avg. Highest Time
6PM19th Oct

27AQI

Avg. Lowest Time
9PM19th Oct

17AQI

In the last 24 hours,

Prospect Harbor's AQI reached its highest point of 31 at 2 PM during the Day, while the lowest point, undefined, was recorded at 5 AM during the Night between 19th Oct and 20th Oct 2025.

Day & Night AQI Trend : Sep - Oct 2025

Prospect Harbor, Maine, United States

SepOct
20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th
Day
Night
20th Sep 2025156 AMAQI
20th Sep 2025177 AMAQI
20th Sep 2025168 AMAQI
20th Sep 2025169 AMAQI
20th Sep 20251710 AMAQI
20th Sep 20251811 AMAQI
20th Sep 20251612 PMAQI
20th Sep 2025141 PMAQI
20th Sep 2025152 PMAQI
20th Sep 2025143 PMAQI
20th Sep 2025144 PMAQI
20th Sep 2025145 PMAQI
20th Sep 2025126 PMAQI
20th Sep 2025157 PMAQI
20th Sep 2025148 PMAQI
20th Sep 2025129 PMAQI
20th Sep 20251310 PMAQI
20th Sep 20251611 PMAQI
21st Sep 20251712 AMAQI
21st Sep 2025171 AMAQI
21st Sep 2025172 AMAQI
21st Sep 2025163 AMAQI
21st Sep 2025164 AMAQI
21st Sep 2025165 AMAQI

12°C8/17°C

21st Sep 2025176 AMAQI
21st Sep 2025187 AMAQI
21st Sep 2025198 AMAQI
21st Sep 2025189 AMAQI
21st Sep 20251610 AMAQI
21st Sep 20251611 AMAQI
21st Sep 20251612 PMAQI
21st Sep 2025151 PMAQI
21st Sep 2025162 PMAQI
21st Sep 2025163 PMAQI
21st Sep 2025164 PMAQI
21st Sep 2025155 PMAQI
21st Sep 2025156 PMAQI
21st Sep 2025167 PMAQI
21st Sep 2025168 PMAQI
21st Sep 2025149 PMAQI
21st Sep 20251610 PMAQI
21st Sep 20251511 PMAQI
22nd Sep 20251612 AMAQI
22nd Sep 2025161 AMAQI
22nd Sep 2025142 AMAQI
22nd Sep 2025173 AMAQI
22nd Sep 2025164 AMAQI
22nd Sep 2025165 AMAQI

11°C7/15°C

22nd Sep 2025166 AMAQI
22nd Sep 2025167 AMAQI
22nd Sep 2025168 AMAQI
22nd Sep 2025199 AMAQI
22nd Sep 20252410 AMAQI
22nd Sep 20252411 AMAQI
22nd Sep 20252012 PMAQI
22nd Sep 2025181 PMAQI
22nd Sep 2025192 PMAQI
22nd Sep 2025173 PMAQI
22nd Sep 2025164 PMAQI
22nd Sep 2025165 PMAQI
22nd Sep 2025156 PMAQI
22nd Sep 2025177 PMAQI
22nd Sep 2025178 PMAQI
22nd Sep 2025159 PMAQI
22nd Sep 20251510 PMAQI
22nd Sep 20251611 PMAQI
23rd Sep 20251712 AMAQI
23rd Sep 2025161 AMAQI
23rd Sep 2025162 AMAQI
23rd Sep 2025153 AMAQI
23rd Sep 2025134 AMAQI
23rd Sep 2025145 AMAQI

13°C9/17°C

23rd Sep 2025156 AMAQI
23rd Sep 2025207 AMAQI
23rd Sep 2025208 AMAQI
23rd Sep 2025209 AMAQI
23rd Sep 20252010 AMAQI
23rd Sep 20252011 AMAQI
23rd Sep 20252012 PMAQI
23rd Sep 2025201 PMAQI
23rd Sep 2025192 PMAQI
23rd Sep 2025203 PMAQI
23rd Sep 2025264 PMAQI
23rd Sep 2025275 PMAQI
23rd Sep 2025246 PMAQI
23rd Sep 2025187 PMAQI
23rd Sep 2025178 PMAQI
23rd Sep 2025209 PMAQI
23rd Sep 20252010 PMAQI
23rd Sep 20251811 PMAQI
24th Sep 20251712 AMAQI
24th Sep 2025151 AMAQI
24th Sep 2025142 AMAQI
24th Sep 2025143 AMAQI
24th Sep 2025174 AMAQI
24th Sep 2025205 AMAQI

14°C13/17°C

24th Sep 2025246 AMAQI
24th Sep 2025267 AMAQI
24th Sep 2025288 AMAQI
24th Sep 2025259 AMAQI
24th Sep 20252210 AMAQI
24th Sep 20251811 AMAQI
24th Sep 20251612 PMAQI
24th Sep 2025161 PMAQI
24th Sep 2025162 PMAQI
24th Sep 2025173 PMAQI
24th Sep 2025184 PMAQI
24th Sep 2025185 PMAQI
24th Sep 2025186 PMAQI
24th Sep 2025187 PMAQI
24th Sep 2025198 PMAQI
24th Sep 2025179 PMAQI
24th Sep 20251710 PMAQI
24th Sep 20251511 PMAQI
25th Sep 20251512 AMAQI
25th Sep 2025141 AMAQI
25th Sep 2025132 AMAQI
25th Sep 2025123 AMAQI
25th Sep 2025164 AMAQI
25th Sep 2025165 AMAQI

14°C13/16°C

25th Sep 2025156 AMAQI
25th Sep 2025177 AMAQI
25th Sep 2025178 AMAQI
25th Sep 2025179 AMAQI
25th Sep 20251610 AMAQI
25th Sep 20251611 AMAQI
25th Sep 20251912 PMAQI
25th Sep 2025211 PMAQI
25th Sep 2025202 PMAQI
25th Sep 2025203 PMAQI
25th Sep 2025204 PMAQI
25th Sep 2025185 PMAQI
25th Sep 2025186 PMAQI
25th Sep 2025187 PMAQI
25th Sep 2025188 PMAQI
25th Sep 2025199 PMAQI
25th Sep 20251910 PMAQI
25th Sep 20251911 PMAQI
26th Sep 20251912 AMAQI
26th Sep 2025191 AMAQI
26th Sep 2025202 AMAQI
26th Sep 2025203 AMAQI
26th Sep 2025204 AMAQI
26th Sep 2025195 AMAQI

13°C10/16°C

26th Sep 2025186 AMAQI
26th Sep 2025147 AMAQI
26th Sep 2025128 AMAQI
26th Sep 2025119 AMAQI
26th Sep 20251110 AMAQI
26th Sep 20251111 AMAQI
26th Sep 20251212 PMAQI
26th Sep 2025131 PMAQI
26th Sep 2025142 PMAQI
26th Sep 2025153 PMAQI
26th Sep 2025164 PMAQI
26th Sep 2025145 PMAQI
26th Sep 2025136 PMAQI
26th Sep 2025157 PMAQI
26th Sep 2025148 PMAQI
26th Sep 2025169 PMAQI
26th Sep 20251710 PMAQI
26th Sep 20251711 PMAQI
27th Sep 20251712 AMAQI
27th Sep 2025171 AMAQI
27th Sep 2025242 AMAQI
27th Sep 2025243 AMAQI
27th Sep 2025184 AMAQI
27th Sep 2025175 AMAQI

17°C14/21°C

27th Sep 2025176 AMAQI
27th Sep 2025177 AMAQI
27th Sep 2025178 AMAQI
27th Sep 2025179 AMAQI
27th Sep 20252110 AMAQI
27th Sep 20252611 AMAQI
27th Sep 20252412 PMAQI
27th Sep 2025201 PMAQI
27th Sep 2025172 PMAQI
27th Sep 2025173 PMAQI
27th Sep 2025174 PMAQI
27th Sep 2025175 PMAQI
27th Sep 2025176 PMAQI
27th Sep 2025177 PMAQI
27th Sep 2025188 PMAQI
27th Sep 2025189 PMAQI
27th Sep 20252110 PMAQI
27th Sep 20252411 PMAQI
28th Sep 20252512 AMAQI
28th Sep 2025241 AMAQI
28th Sep 2025252 AMAQI
28th Sep 2025253 AMAQI
28th Sep 2025234 AMAQI
28th Sep 2025225 AMAQI

15°C13/19°C

28th Sep 2025226 AMAQI
28th Sep 2025207 AMAQI
28th Sep 2025228 AMAQI
28th Sep 2025229 AMAQI
28th Sep 20252310 AMAQI
28th Sep 20252311 AMAQI
28th Sep 20252112 PMAQI
28th Sep 2025201 PMAQI
28th Sep 2025282 PMAQI
28th Sep 2025293 PMAQI
28th Sep 2025254 PMAQI
28th Sep 2025315 PMAQI
28th Sep 2025326 PMAQI
28th Sep 2025397 PMAQI
28th Sep 2025428 PMAQI
28th Sep 2025449 PMAQI
28th Sep 20254110 PMAQI
28th Sep 20253511 PMAQI
29th Sep 20253412 AMAQI
29th Sep 2025291 AMAQI
29th Sep 2025272 AMAQI
29th Sep 2025213 AMAQI
29th Sep 2025214 AMAQI
29th Sep 2025265 AMAQI

15°C12/18°C

29th Sep 2025216 AMAQI
29th Sep 2025207 AMAQI
29th Sep 2025268 AMAQI
29th Sep 2025209 AMAQI
29th Sep 20252210 AMAQI
29th Sep 20252311 AMAQI
29th Sep 20251612 PMAQI
29th Sep 2025121 PMAQI
29th Sep 2025102 PMAQI
29th Sep 2025123 PMAQI
29th Sep 2025134 PMAQI
29th Sep 2025225 PMAQI
29th Sep 2025256 PMAQI
29th Sep 2025167 PMAQI
29th Sep 2025138 PMAQI
29th Sep 2025209 PMAQI
29th Sep 20251810 PMAQI
29th Sep 20252311 PMAQI
30th Sep 20252512 AMAQI
30th Sep 2025301 AMAQI
30th Sep 2025312 AMAQI
30th Sep 2025353 AMAQI
30th Sep 2025254 AMAQI
30th Sep 2025235 AMAQI

16°C12/23°C

30th Sep 2025206 AMAQI
30th Sep 2025187 AMAQI
30th Sep 2025308 AMAQI
30th Sep 2025219 AMAQI
30th Sep 20251810 AMAQI
30th Sep 20251611 AMAQI
30th Sep 20251512 PMAQI
30th Sep 2025101 PMAQI
30th Sep 2025102 PMAQI
30th Sep 2025113 PMAQI
30th Sep 2025134 PMAQI
30th Sep 2025175 PMAQI
30th Sep 2025186 PMAQI
30th Sep 2025197 PMAQI
30th Sep 2025138 PMAQI
30th Sep 2025139 PMAQI
30th Sep 20251110 PMAQI
30th Sep 20251211 PMAQI
1st Oct 20251812 AMAQI
1st Oct 2025211 AMAQI
1st Oct 2025172 AMAQI
1st Oct 2025173 AMAQI
1st Oct 202574 AMAQI
1st Oct 2025105 AMAQI

14°C12/18°C

1st Oct 202576 AMAQI
1st Oct 202567 AMAQI
1st Oct 202568 AMAQI
1st Oct 2025109 AMAQI
1st Oct 20251110 AMAQI
1st Oct 20251111 AMAQI
1st Oct 20251912 PMAQI
1st Oct 2025161 PMAQI
1st Oct 2025122 PMAQI
1st Oct 2025123 PMAQI
1st Oct 2025124 PMAQI
1st Oct 2025115 PMAQI
1st Oct 2025106 PMAQI
1st Oct 2025107 PMAQI
1st Oct 2025188 PMAQI
1st Oct 2025199 PMAQI
1st Oct 20251810 PMAQI
1st Oct 20252011 PMAQI
2nd Oct 20252012 AMAQI
2nd Oct 2025181 AMAQI
2nd Oct 2025182 AMAQI
2nd Oct 2025203 AMAQI
2nd Oct 2025184 AMAQI
2nd Oct 2025205 AMAQI

12°C9/15°C

2nd Oct 2025206 AMAQI
2nd Oct 2025207 AMAQI
2nd Oct 2025208 AMAQI
2nd Oct 2025189 AMAQI
2nd Oct 20252110 AMAQI
2nd Oct 20252011 AMAQI
2nd Oct 20252012 PMAQI
2nd Oct 2025161 PMAQI
2nd Oct 2025142 PMAQI
2nd Oct 2025123 PMAQI
2nd Oct 2025124 PMAQI
2nd Oct 2025115 PMAQI
2nd Oct 2025116 PMAQI
2nd Oct 2025117 PMAQI
2nd Oct 2025128 PMAQI
2nd Oct 2025129 PMAQI
2nd Oct 20251610 PMAQI
2nd Oct 20251811 PMAQI
3rd Oct 20251812 AMAQI
3rd Oct 2025201 AMAQI
3rd Oct 2025192 AMAQI
3rd Oct 2025193 AMAQI
3rd Oct 2025194 AMAQI
3rd Oct 2025195 AMAQI

11°C7/15°C

3rd Oct 2025196 AMAQI
3rd Oct 2025187 AMAQI
3rd Oct 2025248 AMAQI
3rd Oct 2025349 AMAQI
3rd Oct 20252910 AMAQI
3rd Oct 20252511 AMAQI
3rd Oct 20251812 PMAQI
3rd Oct 2025301 PMAQI
3rd Oct 2025222 PMAQI
3rd Oct 2025163 PMAQI
3rd Oct 2025334 PMAQI
3rd Oct 2025495 PMAQI
3rd Oct 2025496 PMAQI
3rd Oct 2025427 PMAQI
3rd Oct 2025368 PMAQI
3rd Oct 2025389 PMAQI
3rd Oct 20254110 PMAQI
3rd Oct 20254511 PMAQI
4th Oct 20254412 AMAQI
4th Oct 2025401 AMAQI
4th Oct 2025292 AMAQI
4th Oct 2025353 AMAQI
4th Oct 2025284 AMAQI
4th Oct 2025285 AMAQI

13°C9/17°C

4th Oct 2025406 AMAQI
4th Oct 2025447 AMAQI
4th Oct 2025388 AMAQI
4th Oct 2025299 AMAQI
4th Oct 20252210 AMAQI
4th Oct 20252211 AMAQI
4th Oct 20253412 PMAQI
4th Oct 2025391 PMAQI
4th Oct 2025432 PMAQI
4th Oct 2025523 PMAQI
4th Oct 2025504 PMAQI
4th Oct 2025515 PMAQI
4th Oct 2025466 PMAQI
4th Oct 2025347 PMAQI
4th Oct 2025348 PMAQI
4th Oct 2025289 PMAQI
4th Oct 20253810 PMAQI
4th Oct 20254411 PMAQI
5th Oct 20254312 AMAQI
5th Oct 2025391 AMAQI
5th Oct 2025402 AMAQI
5th Oct 2025393 AMAQI
5th Oct 2025414 AMAQI
5th Oct 2025405 AMAQI

15°C11/21°C

5th Oct 2025426 AMAQI
5th Oct 2025427 AMAQI
5th Oct 2025398 AMAQI
5th Oct 2025399 AMAQI
5th Oct 20252110 AMAQI
5th Oct 20251311 AMAQI
5th Oct 20251512 PMAQI
5th Oct 2025411 PMAQI
5th Oct 2025612 PMAQI
5th Oct 2025723 PMAQI
5th Oct 2025624 PMAQI
5th Oct 2025565 PMAQI
5th Oct 2025536 PMAQI
5th Oct 2025507 PMAQI
5th Oct 2025438 PMAQI
5th Oct 2025259 PMAQI
5th Oct 20251610 PMAQI
5th Oct 20251411 PMAQI
6th Oct 20252812 AMAQI
6th Oct 2025411 AMAQI
6th Oct 2025402 AMAQI
6th Oct 2025383 AMAQI
6th Oct 2025384 AMAQI
6th Oct 2025405 AMAQI

14°C12/18°C

6th Oct 2025386 AMAQI
6th Oct 2025417 AMAQI
6th Oct 2025388 AMAQI
6th Oct 2025399 AMAQI
6th Oct 20253610 AMAQI
6th Oct 20254511 AMAQI
6th Oct 20254912 PMAQI
6th Oct 2025501 PMAQI

15°C13/21°C

7th Oct 2025397 AMAQI
7th Oct 2025548 AMAQI
7th Oct 2025569 AMAQI
7th Oct 20255910 AMAQI
7th Oct 20255511 AMAQI
7th Oct 20254912 PMAQI
7th Oct 2025441 PMAQI
7th Oct 2025502 PMAQI
7th Oct 2025543 PMAQI
7th Oct 2025574 PMAQI
7th Oct 2025465 PMAQI
7th Oct 2025286 PMAQI
7th Oct 2025187 PMAQI
7th Oct 2025188 PMAQI
7th Oct 2025189 PMAQI
7th Oct 20251810 PMAQI
7th Oct 20251811 PMAQI
8th Oct 20253512 AMAQI
8th Oct 2025511 AMAQI
8th Oct 2025552 AMAQI
8th Oct 2025553 AMAQI
8th Oct 2025574 AMAQI
8th Oct 2025565 AMAQI

14°C13/17°C

8th Oct 2025566 AMAQI
8th Oct 2025567 AMAQI
8th Oct 2025588 AMAQI
8th Oct 2025569 AMAQI
8th Oct 20255710 AMAQI
8th Oct 20255811 AMAQI
8th Oct 20255612 PMAQI
8th Oct 2025591 PMAQI
8th Oct 2025562 PMAQI
8th Oct 2025533 PMAQI
8th Oct 2025464 PMAQI
8th Oct 2025445 PMAQI
8th Oct 2025296 PMAQI
8th Oct 2025227 PMAQI
8th Oct 2025248 PMAQI
8th Oct 2025239 PMAQI
8th Oct 20252210 PMAQI
8th Oct 20252311 PMAQI
9th Oct 20252312 AMAQI
9th Oct 2025221 AMAQI
9th Oct 2025232 AMAQI
9th Oct 2025233 AMAQI
9th Oct 2025224 AMAQI
9th Oct 2025225 AMAQI

14°C9/15°C

9th Oct 2025466 AMAQI
9th Oct 2025577 AMAQI
9th Oct 2025608 AMAQI
9th Oct 2025569 AMAQI
9th Oct 20255310 AMAQI
9th Oct 20253111 AMAQI
9th Oct 20252412 PMAQI
9th Oct 2025221 PMAQI
9th Oct 2025232 PMAQI
9th Oct 2025273 PMAQI
9th Oct 2025274 PMAQI
9th Oct 2025295 PMAQI
9th Oct 2025276 PMAQI
9th Oct 2025327 PMAQI
9th Oct 2025408 PMAQI
9th Oct 2025389 PMAQI
9th Oct 20255310 PMAQI
9th Oct 20255911 PMAQI
10th Oct 20255212 AMAQI
10th Oct 2025481 AMAQI
10th Oct 2025542 AMAQI
10th Oct 2025313 AMAQI
10th Oct 2025314 AMAQI
10th Oct 2025285 AMAQI

9°C6/12°C

10th Oct 2025246 AMAQI
10th Oct 2025217 AMAQI
10th Oct 2025368 AMAQI
10th Oct 2025399 AMAQI
10th Oct 20253610 AMAQI
10th Oct 20255011 AMAQI
10th Oct 20253512 PMAQI
10th Oct 2025261 PMAQI
10th Oct 2025272 PMAQI
10th Oct 2025233 PMAQI
10th Oct 2025234 PMAQI
10th Oct 2025265 PMAQI
10th Oct 2025266 PMAQI
10th Oct 2025247 PMAQI
10th Oct 2025228 PMAQI
10th Oct 2025229 PMAQI
10th Oct 20253010 PMAQI
10th Oct 20253811 PMAQI
11th Oct 20253612 AMAQI
11th Oct 2025251 AMAQI
11th Oct 2025382 AMAQI
11th Oct 2025503 AMAQI
11th Oct 2025334 AMAQI
11th Oct 2025275 AMAQI

9°C4/14°C

11th Oct 2025276 AMAQI
11th Oct 2025337 AMAQI
11th Oct 2025408 AMAQI
11th Oct 2025309 AMAQI
11th Oct 20252410 AMAQI
11th Oct 20251511 AMAQI
11th Oct 20251712 PMAQI
11th Oct 2025231 PMAQI
11th Oct 2025152 PMAQI
11th Oct 2025133 PMAQI
11th Oct 2025144 PMAQI
11th Oct 2025155 PMAQI
11th Oct 2025216 PMAQI
11th Oct 2025177 PMAQI
11th Oct 2025218 PMAQI
11th Oct 2025169 PMAQI
11th Oct 20253510 PMAQI
11th Oct 20254311 PMAQI
12th Oct 20254212 AMAQI
12th Oct 2025441 AMAQI
12th Oct 2025492 AMAQI
12th Oct 2025483 AMAQI
12th Oct 2025424 AMAQI
12th Oct 2025375 AMAQI

12°C9/16°C

12th Oct 2025406 AMAQI
12th Oct 2025297 AMAQI
12th Oct 2025298 AMAQI
12th Oct 2025259 AMAQI
12th Oct 20252510 AMAQI
12th Oct 20252211 AMAQI
12th Oct 20252312 PMAQI
12th Oct 2025241 PMAQI
12th Oct 2025242 PMAQI
12th Oct 2025263 PMAQI
12th Oct 2025284 PMAQI
12th Oct 2025235 PMAQI
12th Oct 2025226 PMAQI
12th Oct 2025267 PMAQI
12th Oct 2025248 PMAQI
12th Oct 2025289 PMAQI
12th Oct 20252710 PMAQI
12th Oct 20252311 PMAQI
13th Oct 20252612 AMAQI
13th Oct 2025261 AMAQI
13th Oct 2025252 AMAQI
13th Oct 2025243 AMAQI
13th Oct 2025234 AMAQI
13th Oct 2025265 AMAQI

12°C9/14°C

13th Oct 2025256 AMAQI
13th Oct 2025267 AMAQI
13th Oct 2025258 AMAQI
13th Oct 2025269 AMAQI
13th Oct 20252610 AMAQI
13th Oct 20252511 AMAQI
13th Oct 20252712 PMAQI
13th Oct 2025291 PMAQI
13th Oct 2025292 PMAQI
13th Oct 2025303 PMAQI
13th Oct 2025264 PMAQI
13th Oct 2025335 PMAQI
13th Oct 2025366 PMAQI
13th Oct 2025327 PMAQI
13th Oct 2025268 PMAQI
13th Oct 2025279 PMAQI
13th Oct 20252610 PMAQI
13th Oct 20252611 PMAQI
14th Oct 20252612 AMAQI
14th Oct 2025291 AMAQI
14th Oct 2025272 AMAQI
14th Oct 2025283 AMAQI
14th Oct 2025284 AMAQI
14th Oct 2025285 AMAQI

11°C9/14°C

14th Oct 2025276 AMAQI
14th Oct 2025267 AMAQI
14th Oct 2025298 AMAQI
14th Oct 2025249 AMAQI
14th Oct 20252510 AMAQI
14th Oct 20252411 AMAQI
14th Oct 20252612 PMAQI
14th Oct 2025281 PMAQI
14th Oct 2025302 PMAQI
14th Oct 2025193 PMAQI
14th Oct 2025244 PMAQI
14th Oct 2025305 PMAQI
14th Oct 2025406 PMAQI
14th Oct 2025437 PMAQI
14th Oct 2025548 PMAQI
14th Oct 2025569 PMAQI
14th Oct 20253710 PMAQI
14th Oct 20253011 PMAQI
15th Oct 20252412 AMAQI
15th Oct 2025241 AMAQI
15th Oct 2025262 AMAQI
15th Oct 2025283 AMAQI
15th Oct 2025274 AMAQI
15th Oct 2025255 AMAQI

12°C10/15°C

15th Oct 2025256 AMAQI
15th Oct 2025227 AMAQI
15th Oct 2025248 AMAQI
15th Oct 2025229 AMAQI
15th Oct 20251610 AMAQI
15th Oct 20253111 AMAQI
15th Oct 20252412 PMAQI
15th Oct 2025371 PMAQI
15th Oct 2025362 PMAQI
15th Oct 2025363 PMAQI
15th Oct 2025394 PMAQI
15th Oct 2025415 PMAQI
15th Oct 2025316 PMAQI
15th Oct 2025297 PMAQI
15th Oct 2025278 PMAQI
15th Oct 2025249 PMAQI
15th Oct 20252610 PMAQI
15th Oct 20252611 PMAQI
16th Oct 20252612 AMAQI
16th Oct 2025311 AMAQI
16th Oct 2025282 AMAQI
16th Oct 2025333 AMAQI
16th Oct 2025284 AMAQI
16th Oct 2025285 AMAQI

11°C9/14°C

16th Oct 2025286 AMAQI
16th Oct 2025277 AMAQI
16th Oct 2025248 AMAQI
16th Oct 2025269 AMAQI
16th Oct 20252510 AMAQI
16th Oct 20252511 AMAQI
16th Oct 20253012 PMAQI
16th Oct 2025311 PMAQI
16th Oct 2025262 PMAQI
16th Oct 2025263 PMAQI
16th Oct 2025274 PMAQI
16th Oct 2025255 PMAQI
16th Oct 2025286 PMAQI
16th Oct 2025297 PMAQI
16th Oct 2025248 PMAQI
16th Oct 2025309 PMAQI
16th Oct 20252710 PMAQI
16th Oct 20252411 PMAQI
17th Oct 20252412 AMAQI
17th Oct 2025321 AMAQI
17th Oct 2025292 AMAQI
17th Oct 2025223 AMAQI
17th Oct 2025304 AMAQI
17th Oct 2025265 AMAQI

9°C8/11°C

17th Oct 2025256 AMAQI
17th Oct 2025277 AMAQI
17th Oct 2025278 AMAQI
17th Oct 2025249 AMAQI
17th Oct 20252510 AMAQI
17th Oct 20252311 AMAQI
17th Oct 20252612 PMAQI
17th Oct 2025291 PMAQI
17th Oct 2025282 PMAQI
17th Oct 2025283 PMAQI
17th Oct 2025274 PMAQI
17th Oct 2025265 PMAQI
17th Oct 2025286 PMAQI
17th Oct 2025247 PMAQI
17th Oct 2025248 PMAQI
17th Oct 2025249 PMAQI
17th Oct 20252310 PMAQI
17th Oct 20252411 PMAQI
18th Oct 20253412 AMAQI
18th Oct 2025231 AMAQI
18th Oct 2025242 AMAQI
18th Oct 2025283 AMAQI
18th Oct 2025234 AMAQI
18th Oct 2025275 AMAQI

11°C10/13°C

18th Oct 2025246 AMAQI
18th Oct 2025247 AMAQI
18th Oct 2025258 AMAQI
18th Oct 2025319 AMAQI
18th Oct 20252710 AMAQI
18th Oct 20252311 AMAQI
18th Oct 20253412 PMAQI
18th Oct 2025311 PMAQI
18th Oct 2025362 PMAQI
18th Oct 2025313 PMAQI
18th Oct 2025274 PMAQI
18th Oct 2025265 PMAQI
18th Oct 2025256 PMAQI
18th Oct 2025287 PMAQI
18th Oct 2025308 PMAQI
18th Oct 2025479 PMAQI
18th Oct 20254010 PMAQI
18th Oct 20253011 PMAQI
19th Oct 20252412 AMAQI
19th Oct 2025231 AMAQI
19th Oct 2025222 AMAQI
19th Oct 2025213 AMAQI
19th Oct 2025224 AMAQI
19th Oct 2025235 AMAQI

11°C10/14°C

19th Oct 2025216 AMAQI
19th Oct 2025217 AMAQI
19th Oct 2025218 AMAQI
19th Oct 2025249 AMAQI
19th Oct 20252210 AMAQI
19th Oct 20252511 AMAQI
19th Oct 20252512 PMAQI
19th Oct 2025241 PMAQI
19th Oct 2025312 PMAQI
19th Oct 2025223 PMAQI
19th Oct 2025244 PMAQI
19th Oct 2025245 PMAQI
19th Oct 2025276 PMAQI
19th Oct 2025247 PMAQI
19th Oct 2025218 PMAQI
19th Oct 2025179 PMAQI
19th Oct 20252010 PMAQI
19th Oct 20252111 PMAQI
20th Oct 20252212 AMAQI
20th Oct 2025201 AMAQI
20th Oct 2025222 AMAQI
20th Oct 2025223 AMAQI

10°C7/13°C

6 AM
12 PM
6 PM
12 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
8 AM

28AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
6 AM

25AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 AM to 8 AM (Avg. 28), while the lowest AQI was between 6 AM to 6 AM (Avg. 25).
Night time
Avg. Highest Time
2 AM - 3 AM

27AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
7 PM - 9 PM

24AQI

3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 AM to 3 AM (Avg. 27), while the lowest AQI was between 7 PM to 9 PM (Avg. 24).

2025 Days Vs Air Quality

Prospect Harbor, Maine, United States

2025

95%

196

5%

11

Total number of days with different AQI categories in last 293 days in 2025 (72 days remaining)

Good
196 Days
Moderate
11 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days



Under WHO’s Safe Air Quality Limits: 95%

Health Risk Level:

Very Low

In 2025, 95% of 293 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

Prospect Harbor, Maine, 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
2nd January 2025
3rd January 2025
4th January 2025
5th January 2025
6th January 2025
7th January 2025
8th January 2025
9th January 2025
10th January 2025
11th January 2025
12th January 2025
13th January 2025
14th January 2025
15th January 2025
16th January 2025
17th January 2025
18th January 2025
19th January 2025
20th January 2025
21st January 2025
22nd January 2025
23rd January 2025
24th January 2025
25th January 2025
26th January 2025
27th January 2025
28th January 2025
29th January 2025
30th January 2025
31st January 2025
1st February 2025
2nd February 2025
3rd February 2025
4th February 2025
5th February 2025
6th February 2025
7th February 2025
8th February 2025
9th February 2025
10th February 2025
11th February 2025
12th February 2025
13th February 2025
14th February 2025
15th February 2025
16th February 2025
17th February 2025
18th February 2025
19th February 2025
20th February 2025
21st February 2025
22nd February 2025
23rd February 2025
24th February 2025
25th February 2025
26th February 2025
27th February 2025
28th February 2025
1st March 2025
2nd March 2025
3rd March 2025
4th March 2025
5th March 2025
6th March 2025
7th March 2025
8th March 2025
9th March 2025
10th March 2025
11th March 2025
12th March 2025
13th March 2025
14th March 2025
15th March 2025
16th March 2025
17th March 2025
18th March 2025
19th March 2025
20th March 2025
21st March 2025
22nd March 2025
23rd March 2025
24th March 2025
25th March 2025
26th March 2025
27th March 2025
21AQI
28th March 2025
19AQI
29th March 2025
19AQI
30th March 2025
21AQI
31st March 2025
18AQI
1st April 2025
17AQI
2nd April 2025
19AQI
3rd April 2025
21AQI
4th April 2025
20AQI
5th April 2025
16AQI
6th April 2025
15AQI
7th April 2025
19AQI
8th April 2025
19AQI
9th April 2025
17AQI
10th April 2025
17AQI
11th April 2025
14AQI
12th April 2025
16AQI
13th April 2025
11AQI
14th April 2025
15AQI
15th April 2025
14AQI
16th April 2025
11AQI
17th April 2025
14AQI
18th April 2025
14AQI
19th April 2025
14AQI
20th April 2025
14AQI
21st April 2025
15AQI
22nd April 2025
16AQI
23rd April 2025
16AQI
24th April 2025
20AQI
25th April 2025
23AQI
26th April 2025
24AQI
27th April 2025
13AQI
28th April 2025
19AQI
29th April 2025
28AQI
30th April 2025
30AQI
1st May 2025
16AQI
2nd May 2025
22AQI
3rd May 2025
25AQI
4th May 2025
21AQI
5th May 2025
17AQI
6th May 2025
21AQI
7th May 2025
15AQI
8th May 2025
21AQI
9th May 2025
17AQI
10th May 2025
13AQI
11th May 2025
15AQI
12th May 2025
18AQI
13th May 2025
18AQI
14th May 2025
19AQI
15th May 2025
25AQI
16th May 2025
23AQI
17th May 2025
23AQI
18th May 2025
15AQI
19th May 2025
15AQI
20th May 2025
13AQI
21st May 2025
15AQI
22nd May 2025
19AQI
23rd May 2025
15AQI
24th May 2025
12AQI
25th May 2025
12AQI
26th May 2025
15AQI
27th May 2025
23AQI
28th May 2025
26AQI
29th May 2025
26AQI
30th May 2025
20AQI
31st May 2025
18AQI
1st June 2025
21AQI
2nd June 2025
19AQI
3rd June 2025
22AQI
4th June 2025
33AQI
5th June 2025
44AQI
6th June 2025
53AQI
7th June 2025
49AQI
8th June 2025
51AQI
9th June 2025
55AQI
10th June 2025
40AQI
11th June 2025
36AQI
12th June 2025
56AQI
13th June 2025
30AQI
14th June 2025
28AQI
15th June 2025
28AQI
16th June 2025
27AQI
17th June 2025
21AQI
18th June 2025
19AQI
19th June 2025
21AQI
20th June 2025
25AQI
21st June 2025
20AQI
22nd June 2025
27AQI
23rd June 2025
38AQI
24th June 2025
46AQI
25th June 2025
48AQI
26th June 2025
21AQI
27th June 2025
22AQI
28th June 2025
22AQI
29th June 2025
17AQI
30th June 2025
21AQI
1st July 2025
28AQI
2nd July 2025
29AQI
3rd July 2025
37AQI
4th July 2025
34AQI
5th July 2025
23AQI
6th July 2025
35AQI
7th July 2025
47AQI
8th July 2025
21AQI
9th July 2025
23AQI
10th July 2025
27AQI
11th July 2025
28AQI
12th July 2025
21AQI
13th July 2025
19AQI
14th July 2025
17AQI
15th July 2025
30AQI
16th July 2025
50AQI
17th July 2025
21AQI
18th July 2025
16AQI
19th July 2025
26AQI
20th July 2025
25AQI
21st July 2025
24AQI
22nd July 2025
17AQI
23rd July 2025
27AQI
24th July 2025
31AQI
25th July 2025
43AQI
26th July 2025
59AQI
27th July 2025
55AQI
28th July 2025
53AQI
29th July 2025
49AQI
30th July 2025
47AQI
31st July 2025
57AQI
1st August 2025
28AQI
2nd August 2025
22AQI
3rd August 2025
48AQI
4th August 2025
69AQI
5th August 2025
39AQI
6th August 2025
24AQI
7th August 2025
31AQI
8th August 2025
43AQI
9th August 2025
31AQI
10th August 2025
28AQI
11th August 2025
38AQI
12th August 2025
56AQI
13th August 2025
59AQI
14th August 2025
39AQI
15th August 2025
23AQI
16th August 2025
25AQI
17th August 2025
25AQI
18th August 2025
14AQI
19th August 2025
15AQI
20th August 2025
20AQI
21st August 2025
23AQI
22nd August 2025
22AQI
23rd August 2025
28AQI
24th August 2025
32AQI
25th August 2025
23AQI
26th August 2025
16AQI
27th August 2025
17AQI
28th August 2025
19AQI
29th August 2025
20AQI
30th August 2025
18AQI
31st August 2025
17AQI
1st September 2025
24AQI
2nd September 2025
28AQI
3rd September 2025
27AQI
4th September 2025
21AQI
5th September 2025
20AQI
6th September 2025
25AQI
7th September 2025
22AQI
8th September 2025
20AQI
9th September 2025
18AQI
10th September 2025
19AQI
11th September 2025
21AQI
12th September 2025
18AQI
13th September 2025
18AQI
14th September 2025
16AQI
15th September 2025
20AQI
16th September 2025
23AQI
17th September 2025
23AQI
18th September 2025
20AQI
19th September 2025
18AQI
20th September 2025
15AQI
21st September 2025
16AQI
22nd September 2025
17AQI
23rd September 2025
19AQI
24th September 2025
18AQI
25th September 2025
17AQI
26th September 2025
16AQI
27th September 2025
19AQI
28th September 2025
28AQI
29th September 2025
21AQI
30th September 2025
19AQI
1st October 2025
14AQI
2nd October 2025
16AQI
3rd October 2025
29AQI
4th October 2025
37AQI
5th October 2025
39AQI
6th October 2025
38AQI
7th October 2025
38AQI
8th October 2025
44AQI
9th October 2025
35AQI
10th October 2025
32AQI
11th October 2025
27AQI
12th October 2025
31AQI
13th October 2025
27AQI
14th October 2025
32AQI
15th October 2025
28AQI
16th October 2025
27AQI
17th October 2025
26AQI
18th October 2025
29AQI
19th October 2025
23AQI
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
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

20AQI

17AQI

18AQI

32AQI

33AQI

29AQI

20AQI

30AQI


No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202525AQI

5
30
31
26
4
27
4
28
3
30
19
196
11

Highest AQI recorded in

July

33AQI


Lowest AQI recorded in

April

17AQI


Most & Least Polluted Years Over the Last 1 Years

Most Polluted Year Recorded
2025(Avg.)
25AQI
Least Polluted Year Recorded
2025(Avg.)
25AQI


Prospect Harbor's annual 2025 AQI (25) shows an average percentage change of NaN% (improved AQI) compared to previous years: .