Chester, Susanville, California, 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
Chester, Susanville, California, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
17th Aug 2021
267AQILowest AQI recorded on
27th Aug 2023
4AQISame Day Analysis (12th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 28 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 12th Aug - 13th Aug 2025
Chester, Susanville, California, United States
AQI
Day
Night
.
6 AM12th Aug 2025
8 PM
5 AM13th Aug 2025
Day time
Avg. Highest Time
11AM12th Aug
36AQI
Avg. Lowest Time
7AM12th Aug
23AQI
Night time
Avg. Highest Time
4AM13th Aug
29AQI
Avg. Lowest Time
2AM13th Aug
25AQI
In the last 24 hours,
Chester's AQI reached its highest point of 36 at 11 AM during the Day, while the lowest point, 23, was recorded at 7 AM during the Day between 12th Aug and 13th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Chester, Susanville, California, United States
JulAug
14th - 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 - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th
Day
Night
14th Jul 2025626 AMAQI
14th Jul 2025627 AMAQI
14th Jul 2025608 AMAQI
14th Jul 2025669 AMAQI
14th Jul 20256410 AMAQI
14th Jul 20256311 AMAQI
14th Jul 20256912 PMAQI
14th Jul 2025651 PMAQI
14th Jul 2025682 PMAQI
14th Jul 2025643 PMAQI
14th Jul 2025624 PMAQI
14th Jul 2025625 PMAQI
14th Jul 2025586 PMAQI
14th Jul 2025587 PMAQI
14th Jul 2025578 PMAQI
14th Jul 2025559 PMAQI
14th Jul 20255410 PMAQI
14th Jul 20255411 PMAQI
15th Jul 20255412 AMAQI
15th Jul 2025541 AMAQI
15th Jul 2025542 AMAQI
15th Jul 2025543 AMAQI
15th Jul 2025364 AMAQI
15th Jul 2025365 AMAQI
25°C19/33°C
15th Jul 2025406 AMAQI
15th Jul 2025467 AMAQI
15th Jul 2025438 AMAQI
15th Jul 2025459 AMAQI
15th Jul 20254810 AMAQI
15th Jul 20255011 AMAQI
15th Jul 20254812 PMAQI
15th Jul 2025501 PMAQI
15th Jul 2025522 PMAQI
15th Jul 2025503 PMAQI
15th Jul 2025474 PMAQI
15th Jul 2025485 PMAQI
15th Jul 2025476 PMAQI
15th Jul 2025487 PMAQI
15th Jul 2025478 PMAQI
15th Jul 2025459 PMAQI
15th Jul 20254610 PMAQI
15th Jul 20254611 PMAQI
16th Jul 20254412 AMAQI
16th Jul 2025431 AMAQI
16th Jul 2025452 AMAQI
16th Jul 2025433 AMAQI
16th Jul 2025334 AMAQI
16th Jul 2025325 AMAQI
23°C17/30°C
16th Jul 2025336 AMAQI
16th Jul 2025377 AMAQI
16th Jul 2025348 AMAQI
16th Jul 2025409 AMAQI
16th Jul 20254310 AMAQI
16th Jul 20254111 AMAQI
16th Jul 20253612 PMAQI
16th Jul 2025411 PMAQI
16th Jul 2025432 PMAQI
16th Jul 2025393 PMAQI
16th Jul 2025384 PMAQI
16th Jul 2025385 PMAQI
16th Jul 2025406 PMAQI
16th Jul 2025427 PMAQI
16th Jul 2025398 PMAQI
16th Jul 2025379 PMAQI
16th Jul 20253310 PMAQI
16th Jul 20253811 PMAQI
17th Jul 20253612 AMAQI
17th Jul 2025381 AMAQI
17th Jul 2025372 AMAQI
17th Jul 2025363 AMAQI
17th Jul 2025254 AMAQI
17th Jul 2025245 AMAQI
22°C16/28°C
17th Jul 2025306 AMAQI
17th Jul 2025377 AMAQI
17th Jul 2025348 AMAQI
17th Jul 2025339 AMAQI
17th Jul 20253010 AMAQI
17th Jul 20253411 AMAQI
17th Jul 20253712 PMAQI
17th Jul 2025401 PMAQI
17th Jul 2025342 PMAQI
17th Jul 2025413 PMAQI
17th Jul 2025314 PMAQI
17th Jul 2025325 PMAQI
17th Jul 2025306 PMAQI
17th Jul 2025367 PMAQI
17th Jul 2025368 PMAQI
17th Jul 2025359 PMAQI
17th Jul 20253510 PMAQI
17th Jul 20253411 PMAQI
18th Jul 20253312 AMAQI
18th Jul 2025331 AMAQI
18th Jul 2025332 AMAQI
18th Jul 2025323 AMAQI
18th Jul 2025264 AMAQI
18th Jul 2025215 AMAQI
20°C13/28°C
18th Jul 2025226 AMAQI
18th Jul 2025287 AMAQI
18th Jul 2025298 AMAQI
18th Jul 2025349 AMAQI
18th Jul 20254210 AMAQI
18th Jul 20254211 AMAQI
18th Jul 20254112 PMAQI
18th Jul 2025421 PMAQI
18th Jul 2025342 PMAQI
18th Jul 2025363 PMAQI
18th Jul 2025324 PMAQI
18th Jul 2025285 PMAQI
18th Jul 2025296 PMAQI
18th Jul 2025307 PMAQI
18th Jul 2025368 PMAQI
18th Jul 2025319 PMAQI
18th Jul 20252910 PMAQI
18th Jul 20253011 PMAQI
19th Jul 20252912 AMAQI
19th Jul 2025281 AMAQI
19th Jul 2025302 AMAQI
19th Jul 2025323 AMAQI
19th Jul 2025274 AMAQI
19th Jul 2025235 AMAQI
21°C14/28°C
19th Jul 2025266 AMAQI
19th Jul 2025337 AMAQI
19th Jul 2025378 AMAQI
19th Jul 2025389 AMAQI
19th Jul 20253510 AMAQI
19th Jul 20254611 AMAQI
19th Jul 20254112 PMAQI
19th Jul 2025351 PMAQI
19th Jul 2025282 PMAQI
19th Jul 2025313 PMAQI
19th Jul 2025354 PMAQI
19th Jul 2025345 PMAQI
19th Jul 2025326 PMAQI
19th Jul 2025297 PMAQI
19th Jul 2025308 PMAQI
19th Jul 2025299 PMAQI
19th Jul 20252910 PMAQI
19th Jul 20252911 PMAQI
20th Jul 20253012 AMAQI
20th Jul 2025361 AMAQI
20th Jul 2025382 AMAQI
20th Jul 2025383 AMAQI
20th Jul 2025354 AMAQI
20th Jul 2025375 AMAQI
22°C14/29°C
20th Jul 2025456 AMAQI
20th Jul 2025397 AMAQI
20th Jul 2025408 AMAQI
20th Jul 2025429 AMAQI
20th Jul 20253810 AMAQI
20th Jul 20253011 AMAQI
20th Jul 20252612 PMAQI
20th Jul 2025261 PMAQI
20th Jul 2025302 PMAQI
20th Jul 2025343 PMAQI
20th Jul 2025324 PMAQI
20th Jul 2025305 PMAQI
20th Jul 2025296 PMAQI
20th Jul 2025297 PMAQI
20th Jul 2025308 PMAQI
20th Jul 2025299 PMAQI
20th Jul 20252710 PMAQI
20th Jul 20252711 PMAQI
21st Jul 20253012 AMAQI
21st Jul 2025291 AMAQI
21st Jul 2025342 AMAQI
21st Jul 2025353 AMAQI
21st Jul 2025404 AMAQI
21st Jul 2025275 AMAQI
21°C14/28°C
21st Jul 2025236 AMAQI
21st Jul 2025267 AMAQI
21st Jul 2025238 AMAQI
21st Jul 2025229 AMAQI
21st Jul 20252410 AMAQI
21st Jul 20252611 AMAQI
21st Jul 20252412 PMAQI
21st Jul 2025221 PMAQI
21st Jul 2025252 PMAQI
21st Jul 2025263 PMAQI
21st Jul 2025264 PMAQI
21st Jul 2025265 PMAQI
21st Jul 2025246 PMAQI
21st Jul 2025257 PMAQI
21st Jul 2025248 PMAQI
21st Jul 2025249 PMAQI
21st Jul 20252410 PMAQI
21st Jul 20252411 PMAQI
22nd Jul 20252612 AMAQI
22nd Jul 2025251 AMAQI
22nd Jul 2025232 AMAQI
22nd Jul 2025183 AMAQI
22nd Jul 2025164 AMAQI
22nd Jul 2025165 AMAQI
17°C12/24°C
22nd Jul 2025166 AMAQI
22nd Jul 2025167 AMAQI
22nd Jul 2025158 AMAQI
22nd Jul 2025169 AMAQI
22nd Jul 20251810 AMAQI
22nd Jul 20251811 AMAQI
22nd Jul 20251712 PMAQI
22nd Jul 2025181 PMAQI
22nd Jul 2025172 PMAQI
22nd Jul 2025173 PMAQI
22nd Jul 2025194 PMAQI
22nd Jul 2025195 PMAQI
22nd Jul 2025216 PMAQI
22nd Jul 2025187 PMAQI
22nd Jul 2025178 PMAQI
22nd Jul 2025189 PMAQI
22nd Jul 20251710 PMAQI
22nd Jul 20251511 PMAQI
23rd Jul 20251712 AMAQI
23rd Jul 2025171 AMAQI
23rd Jul 2025182 AMAQI
23rd Jul 2025203 AMAQI
23rd Jul 2025164 AMAQI
23rd Jul 2025155 AMAQI
17°C10/24°C
23rd Jul 2025146 AMAQI
23rd Jul 2025147 AMAQI
23rd Jul 2025178 AMAQI
23rd Jul 2025199 AMAQI
23rd Jul 20251810 AMAQI
23rd Jul 20251811 AMAQI
23rd Jul 20251712 PMAQI
23rd Jul 2025171 PMAQI
23rd Jul 2025172 PMAQI
23rd Jul 2025173 PMAQI
23rd Jul 2025194 PMAQI
23rd Jul 2025185 PMAQI
23rd Jul 2025176 PMAQI
23rd Jul 2025207 PMAQI
23rd Jul 2025188 PMAQI
23rd Jul 2025209 PMAQI
23rd Jul 20252110 PMAQI
23rd Jul 20252011 PMAQI
24th Jul 20251912 AMAQI
24th Jul 2025191 AMAQI
24th Jul 2025182 AMAQI
24th Jul 2025183 AMAQI
24th Jul 2025184 AMAQI
24th Jul 2025185 AMAQI
18°C11/26°C
24th Jul 2025156 AMAQI
24th Jul 2025167 AMAQI
24th Jul 2025168 AMAQI
24th Jul 2025219 AMAQI
24th Jul 20251510 AMAQI
24th Jul 20251611 AMAQI
24th Jul 20252112 PMAQI
24th Jul 2025191 PMAQI
24th Jul 2025212 PMAQI
24th Jul 2025193 PMAQI
24th Jul 2025194 PMAQI
24th Jul 2025205 PMAQI
24th Jul 2025246 PMAQI
24th Jul 2025227 PMAQI
24th Jul 2025208 PMAQI
24th Jul 2025199 PMAQI
24th Jul 20252010 PMAQI
24th Jul 20252011 PMAQI
25th Jul 20252412 AMAQI
25th Jul 2025181 AMAQI
25th Jul 2025202 AMAQI
25th Jul 2025203 AMAQI
25th Jul 2025224 AMAQI
25th Jul 2025235 AMAQI
19°C12/27°C
25th Jul 2025216 AMAQI
25th Jul 2025217 AMAQI
25th Jul 2025218 AMAQI
25th Jul 2025229 AMAQI
25th Jul 20252610 AMAQI
25th Jul 20252611 AMAQI
25th Jul 20252612 PMAQI
25th Jul 2025201 PMAQI
25th Jul 2025212 PMAQI
25th Jul 2025223 PMAQI
25th Jul 2025284 PMAQI
25th Jul 2025215 PMAQI
25th Jul 2025206 PMAQI
25th Jul 2025217 PMAQI
25th Jul 2025228 PMAQI
25th Jul 2025229 PMAQI
25th Jul 20252210 PMAQI
25th Jul 20252111 PMAQI
26th Jul 20252212 AMAQI
26th Jul 2025231 AMAQI
26th Jul 2025222 AMAQI
26th Jul 2025233 AMAQI
26th Jul 2025164 AMAQI
26th Jul 2025165 AMAQI
18°C11/26°C
26th Jul 2025166 AMAQI
26th Jul 2025167 AMAQI
26th Jul 2025208 AMAQI
26th Jul 2025189 AMAQI
26th Jul 20252110 AMAQI
26th Jul 20252111 AMAQI
26th Jul 20252212 PMAQI
26th Jul 2025231 PMAQI
26th Jul 2025222 PMAQI
26th Jul 2025233 PMAQI
26th Jul 2025234 PMAQI
26th Jul 2025225 PMAQI
26th Jul 2025206 PMAQI
26th Jul 2025227 PMAQI
26th Jul 2025228 PMAQI
26th Jul 2025249 PMAQI
26th Jul 20252610 PMAQI
26th Jul 20252611 PMAQI
27th Jul 20252212 AMAQI
27th Jul 2025221 AMAQI
27th Jul 2025262 AMAQI
27th Jul 2025253 AMAQI
27th Jul 2025324 AMAQI
27th Jul 2025175 AMAQI
17°C10/23°C
27th Jul 2025176 AMAQI
27th Jul 2025187 AMAQI
27th Jul 2025168 AMAQI
27th Jul 2025189 AMAQI
27th Jul 20252010 AMAQI
27th Jul 20252211 AMAQI
27th Jul 20252912 PMAQI
27th Jul 2025291 PMAQI
27th Jul 2025262 PMAQI
27th Jul 2025253 PMAQI
27th Jul 2025264 PMAQI
27th Jul 2025235 PMAQI
27th Jul 2025216 PMAQI
27th Jul 2025247 PMAQI
27th Jul 2025238 PMAQI
27th Jul 2025189 PMAQI
27th Jul 20252110 PMAQI
27th Jul 20252011 PMAQI
28th Jul 20251912 AMAQI
28th Jul 2025191 AMAQI
28th Jul 2025202 AMAQI
28th Jul 2025233 AMAQI
28th Jul 2025204 AMAQI
28th Jul 2025355 AMAQI
18°C12/24°C
28th Jul 2025396 AMAQI
28th Jul 2025317 AMAQI
28th Jul 2025268 AMAQI
28th Jul 2025279 AMAQI
28th Jul 20252110 AMAQI
28th Jul 20251911 AMAQI
28th Jul 20252312 PMAQI
28th Jul 2025231 PMAQI
28th Jul 2025262 PMAQI
28th Jul 2025253 PMAQI
28th Jul 2025254 PMAQI
28th Jul 2025255 PMAQI
28th Jul 2025236 PMAQI
28th Jul 2025237 PMAQI
28th Jul 2025228 PMAQI
28th Jul 2025239 PMAQI
28th Jul 20252210 PMAQI
28th Jul 20252411 PMAQI
29th Jul 20252712 AMAQI
29th Jul 2025271 AMAQI
29th Jul 2025252 AMAQI
29th Jul 2025283 AMAQI
29th Jul 2025284 AMAQI
29th Jul 2025175 AMAQI
19°C12/27°C
29th Jul 2025226 AMAQI
29th Jul 2025277 AMAQI
29th Jul 2025288 AMAQI
29th Jul 2025249 AMAQI
29th Jul 20252410 AMAQI
29th Jul 20252411 AMAQI
29th Jul 20252612 PMAQI
29th Jul 2025321 PMAQI
29th Jul 2025282 PMAQI
29th Jul 2025293 PMAQI
29th Jul 2025284 PMAQI
29th Jul 2025275 PMAQI
29th Jul 2025236 PMAQI
29th Jul 2025287 PMAQI
29th Jul 2025288 PMAQI
29th Jul 2025239 PMAQI
29th Jul 20252210 PMAQI
29th Jul 20252311 PMAQI
30th Jul 20252412 AMAQI
30th Jul 2025251 AMAQI
30th Jul 2025272 AMAQI
30th Jul 2025283 AMAQI
30th Jul 2025174 AMAQI
30th Jul 2025185 AMAQI
21°C13/28°C
30th Jul 2025186 AMAQI
30th Jul 2025227 AMAQI
30th Jul 2025248 AMAQI
30th Jul 2025209 AMAQI
30th Jul 20252310 AMAQI
30th Jul 20253011 AMAQI
30th Jul 20253412 PMAQI
30th Jul 2025311 PMAQI
30th Jul 2025282 PMAQI
30th Jul 2025293 PMAQI
30th Jul 2025294 PMAQI
30th Jul 2025295 PMAQI
30th Jul 2025296 PMAQI
30th Jul 2025297 PMAQI
30th Jul 2025298 PMAQI
30th Jul 2025269 PMAQI
30th Jul 20252510 PMAQI
30th Jul 20252711 PMAQI
31st Jul 20252612 AMAQI
31st Jul 2025241 AMAQI
31st Jul 2025232 AMAQI
31st Jul 2025263 AMAQI
31st Jul 2025204 AMAQI
31st Jul 2025175 AMAQI
19°C14/25°C
31st Jul 2025226 AMAQI
31st Jul 2025207 AMAQI
31st Jul 2025278 AMAQI
31st Jul 2025249 AMAQI
31st Jul 20252710 AMAQI
31st Jul 20252911 AMAQI
31st Jul 20252612 PMAQI
31st Jul 2025251 PMAQI
31st Jul 2025232 PMAQI
31st Jul 2025203 PMAQI
31st Jul 2025204 PMAQI
31st Jul 2025205 PMAQI
31st Jul 2025206 PMAQI
31st Jul 2025207 PMAQI
31st Jul 2025208 PMAQI
31st Jul 2025199 PMAQI
31st Jul 20252110 PMAQI
31st Jul 20252411 PMAQI
1st Aug 20252312 AMAQI
1st Aug 2025211 AMAQI
1st Aug 2025202 AMAQI
1st Aug 2025233 AMAQI
1st Aug 2025244 AMAQI
1st Aug 2025265 AMAQI
19°C12/26°C
1st Aug 2025266 AMAQI
1st Aug 2025267 AMAQI
1st Aug 2025288 AMAQI
1st Aug 2025329 AMAQI
1st Aug 20253810 AMAQI
1st Aug 20254011 AMAQI
1st Aug 20253812 PMAQI
1st Aug 2025371 PMAQI
1st Aug 2025322 PMAQI
1st Aug 2025283 PMAQI
1st Aug 2025224 PMAQI
1st Aug 2025205 PMAQI
1st Aug 2025206 PMAQI
1st Aug 2025267 PMAQI
1st Aug 2025248 PMAQI
1st Aug 2025219 PMAQI
1st Aug 20252010 PMAQI
1st Aug 20252011 PMAQI
2nd Aug 20252112 AMAQI
2nd Aug 2025201 AMAQI
2nd Aug 2025202 AMAQI
2nd Aug 2025223 AMAQI
2nd Aug 2025224 AMAQI
2nd Aug 2025225 AMAQI
20°C13/27°C
2nd Aug 2025246 AMAQI
2nd Aug 2025267 AMAQI
2nd Aug 2025268 AMAQI
2nd Aug 2025319 AMAQI
2nd Aug 20253610 AMAQI
2nd Aug 20254011 AMAQI
2nd Aug 20253212 PMAQI
2nd Aug 2025301 PMAQI
2nd Aug 2025262 PMAQI
2nd Aug 2025233 PMAQI
2nd Aug 2025204 PMAQI
2nd Aug 2025195 PMAQI
2nd Aug 2025196 PMAQI
2nd Aug 2025227 PMAQI
2nd Aug 2025238 PMAQI
2nd Aug 2025269 PMAQI
2nd Aug 20253310 PMAQI
2nd Aug 20253811 PMAQI
3rd Aug 20253012 AMAQI
3rd Aug 2025251 AMAQI
3rd Aug 2025282 AMAQI
3rd Aug 2025263 AMAQI
3rd Aug 2025244 AMAQI
3rd Aug 2025215 AMAQI
20°C14/27°C
3rd Aug 2025226 AMAQI
3rd Aug 2025227 AMAQI
3rd Aug 2025188 AMAQI
3rd Aug 2025209 AMAQI
3rd Aug 20252310 AMAQI
3rd Aug 20252611 AMAQI
3rd Aug 20252712 PMAQI
3rd Aug 2025241 PMAQI
3rd Aug 2025212 PMAQI
3rd Aug 2025203 PMAQI
3rd Aug 2025204 PMAQI
3rd Aug 2025205 PMAQI
3rd Aug 2025196 PMAQI
3rd Aug 2025217 PMAQI
3rd Aug 2025208 PMAQI
3rd Aug 2025209 PMAQI
3rd Aug 20251910 PMAQI
3rd Aug 20251911 PMAQI
4th Aug 20252312 AMAQI
4th Aug 2025231 AMAQI
4th Aug 2025252 AMAQI
4th Aug 2025223 AMAQI
4th Aug 2025234 AMAQI
4th Aug 2025205 AMAQI
19°C13/26°C
4th Aug 2025216 AMAQI
4th Aug 2025227 AMAQI
4th Aug 2025208 AMAQI
4th Aug 2025229 AMAQI
4th Aug 20252510 AMAQI
4th Aug 20253011 AMAQI
4th Aug 20253012 PMAQI
4th Aug 2025261 PMAQI
4th Aug 2025262 PMAQI
4th Aug 2025243 PMAQI
4th Aug 2025224 PMAQI
4th Aug 2025225 PMAQI
4th Aug 2025196 PMAQI
4th Aug 2025237 PMAQI
4th Aug 2025218 PMAQI
4th Aug 2025199 PMAQI
4th Aug 20251910 PMAQI
4th Aug 20252011 PMAQI
5th Aug 20252312 AMAQI
5th Aug 2025221 AMAQI
5th Aug 2025212 AMAQI
5th Aug 2025233 AMAQI
5th Aug 2025224 AMAQI
5th Aug 2025225 AMAQI
18°C11/24°C
5th Aug 2025216 AMAQI
5th Aug 2025257 AMAQI
5th Aug 2025288 AMAQI
5th Aug 2025289 AMAQI
5th Aug 20252410 AMAQI
5th Aug 20252711 AMAQI
5th Aug 20253012 PMAQI
5th Aug 2025301 PMAQI
5th Aug 2025252 PMAQI
5th Aug 2025253 PMAQI
5th Aug 2025214 PMAQI
5th Aug 2025225 PMAQI
5th Aug 2025196 PMAQI
5th Aug 2025247 PMAQI
5th Aug 2025228 PMAQI
5th Aug 2025209 PMAQI
5th Aug 20252010 PMAQI
5th Aug 20252111 PMAQI
6th Aug 20252212 AMAQI
6th Aug 2025241 AMAQI
6th Aug 2025262 AMAQI
6th Aug 2025263 AMAQI
6th Aug 2025264 AMAQI
6th Aug 2025265 AMAQI
18°C11/26°C
6th Aug 2025226 AMAQI
6th Aug 2025247 AMAQI
6th Aug 2025288 AMAQI
6th Aug 2025289 AMAQI
6th Aug 20252710 AMAQI
6th Aug 20252811 AMAQI
6th Aug 20252912 PMAQI
6th Aug 2025341 PMAQI
6th Aug 2025312 PMAQI
6th Aug 2025233 PMAQI
6th Aug 2025204 PMAQI
6th Aug 2025205 PMAQI
6th Aug 2025176 PMAQI
6th Aug 2025237 PMAQI
6th Aug 2025188 PMAQI
6th Aug 2025169 PMAQI
6th Aug 20251710 PMAQI
6th Aug 20251811 PMAQI
7th Aug 20252212 AMAQI
7th Aug 2025241 AMAQI
7th Aug 2025242 AMAQI
7th Aug 2025243 AMAQI
7th Aug 2025184 AMAQI
7th Aug 2025185 AMAQI
19°C12/26°C
7th Aug 2025186 AMAQI
7th Aug 2025207 AMAQI
7th Aug 2025228 AMAQI
7th Aug 2025209 AMAQI
7th Aug 20252210 AMAQI
7th Aug 20251911 AMAQI
7th Aug 20252012 PMAQI
7th Aug 2025221 PMAQI
7th Aug 2025212 PMAQI
7th Aug 2025213 PMAQI
7th Aug 2025254 PMAQI
7th Aug 2025185 PMAQI
7th Aug 2025196 PMAQI
7th Aug 2025197 PMAQI
7th Aug 2025218 PMAQI
7th Aug 2025249 PMAQI
7th Aug 20252010 PMAQI
7th Aug 20252011 PMAQI
8th Aug 20252212 AMAQI
8th Aug 2025211 AMAQI
8th Aug 2025222 AMAQI
8th Aug 2025203 AMAQI
8th Aug 2025194 AMAQI
8th Aug 2025195 AMAQI
20°C12/27°C
8th Aug 2025196 AMAQI
8th Aug 2025197 AMAQI
8th Aug 2025218 AMAQI
8th Aug 2025209 AMAQI
8th Aug 20253010 AMAQI
8th Aug 20253711 AMAQI
8th Aug 20252912 PMAQI
8th Aug 2025221 PMAQI
8th Aug 2025202 PMAQI
8th Aug 2025233 PMAQI
8th Aug 2025244 PMAQI
8th Aug 2025285 PMAQI
8th Aug 2025286 PMAQI
8th Aug 2025247 PMAQI
8th Aug 2025228 PMAQI
8th Aug 2025219 PMAQI
8th Aug 20252110 PMAQI
8th Aug 20252111 PMAQI
9th Aug 20252112 AMAQI
9th Aug 2025221 AMAQI
9th Aug 2025222 AMAQI
9th Aug 2025213 AMAQI
9th Aug 2025224 AMAQI
9th Aug 2025205 AMAQI
22°C14/29°C
9th Aug 2025216 AMAQI
9th Aug 2025207 AMAQI
9th Aug 2025198 AMAQI
9th Aug 2025209 AMAQI
9th Aug 20252110 AMAQI
9th Aug 20252011 AMAQI
9th Aug 20252212 PMAQI
9th Aug 2025211 PMAQI
9th Aug 2025212 PMAQI
9th Aug 2025223 PMAQI
9th Aug 2025204 PMAQI
9th Aug 2025255 PMAQI
9th Aug 2025296 PMAQI
9th Aug 2025237 PMAQI
9th Aug 2025188 PMAQI
9th Aug 2025209 PMAQI
9th Aug 20251910 PMAQI
9th Aug 20252011 PMAQI
10th Aug 20252212 AMAQI
10th Aug 2025221 AMAQI
10th Aug 2025282 AMAQI
10th Aug 2025223 AMAQI
10th Aug 2025274 AMAQI
10th Aug 2025215 AMAQI
24°C16/31°C
10th Aug 2025236 AMAQI
10th Aug 2025217 AMAQI
10th Aug 2025228 AMAQI
10th Aug 2025219 AMAQI
10th Aug 20252010 AMAQI
10th Aug 20252111 AMAQI
10th Aug 20252412 PMAQI
10th Aug 2025281 PMAQI
10th Aug 2025252 PMAQI
10th Aug 2025233 PMAQI
10th Aug 2025234 PMAQI
10th Aug 2025225 PMAQI
10th Aug 2025226 PMAQI
10th Aug 2025217 PMAQI
10th Aug 2025198 PMAQI
10th Aug 2025189 PMAQI
10th Aug 20251710 PMAQI
10th Aug 20252011 PMAQI
11th Aug 20252112 AMAQI
11th Aug 2025301 AMAQI
11th Aug 2025182 AMAQI
11th Aug 2025213 AMAQI
11th Aug 2025224 AMAQI
11th Aug 2025225 AMAQI
24°C17/32°C
11th Aug 2025236 AMAQI
11th Aug 2025217 AMAQI
11th Aug 2025218 AMAQI
11th Aug 2025239 AMAQI
11th Aug 20252610 AMAQI
11th Aug 20253111 AMAQI
11th Aug 20252912 PMAQI
11th Aug 2025301 PMAQI
11th Aug 2025322 PMAQI
11th Aug 2025303 PMAQI
11th Aug 2025254 PMAQI
11th Aug 2025245 PMAQI
11th Aug 2025226 PMAQI
11th Aug 2025267 PMAQI
11th Aug 2025248 PMAQI
11th Aug 2025209 PMAQI
11th Aug 20252010 PMAQI
11th Aug 20252211 PMAQI
12th Aug 20252412 AMAQI
12th Aug 2025281 AMAQI
12th Aug 2025262 AMAQI
12th Aug 2025283 AMAQI
12th Aug 2025264 AMAQI
12th Aug 2025255 AMAQI
25°C18/33°C
12th Aug 2025236 AMAQI
12th Aug 2025237 AMAQI
12th Aug 2025268 AMAQI
12th Aug 2025259 AMAQI
12th Aug 20252910 AMAQI
12th Aug 20253611 AMAQI
12th Aug 20253512 PMAQI
12th Aug 2025331 PMAQI
12th Aug 2025322 PMAQI
12th Aug 2025303 PMAQI
12th Aug 2025304 PMAQI
12th Aug 2025325 PMAQI
12th Aug 2025266 PMAQI
12th Aug 2025287 PMAQI
12th Aug 2025278 PMAQI
12th Aug 2025289 PMAQI
12th Aug 20252610 PMAQI
12th Aug 20252811 PMAQI
13th Aug 20252612 AMAQI
13th Aug 2025251 AMAQI
13th Aug 2025252 AMAQI
13th Aug 2025263 AMAQI
13th Aug 2025294 AMAQI
13th Aug 2025265 AMAQI
25°C18/33°C
13th Aug 2025266 AMAQI
6 AM13th Aug 2025247 AMAQI
13th Aug 2025248 AMAQI
13th Aug 2025269 AMAQI
13th Aug 20253010 AMAQI
13th Aug 20253711 AMAQI
13th Aug 20253612 PMAQI
13th Aug 2025421 PMAQI
1 PM13th Aug 2025402 PMAQI
13th Aug 2025383 PMAQI
13th Aug 2025284 PMAQI
8 PM
1 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
11 AM - 8 PM
28AQI
10 hours / Day
300 hours / Month
Avg. Lowest Time
6 AM - 9 AM
26AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 AM to 8 PM (Avg. 28), while the lowest AQI was between 6 AM to 9 AM (Avg. 26).
Night time
Avg. Highest Time
12 AM - 3 AM
28AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
5 AM - 11 PM
25AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 3 AM (Avg. 28), while the lowest AQI was between 5 AM to 11 PM (Avg. 25).
2025 Days Vs Air Quality
Chester, Susanville, California, United States
2025
88%
197
12%
27
Total number of days with different AQI categories in last 225 days in 2025 (140 days remaining)
Good
197 DaysModerate
27 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 88%
Health Risk Level:
Low
In 2025, 88% of 225 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
Chester, Susanville, California, 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
64AQI
64AQI
2nd January 2025
67AQI
67AQI
3rd January 2025
54AQI
54AQI
4th January 2025
52AQI
52AQI
5th January 2025
62AQI
62AQI
6th January 2025
52AQI
52AQI
7th January 2025
44AQI
44AQI
8th January 2025
48AQI
48AQI
9th January 2025
54AQI
54AQI
10th January 2025
52AQI
52AQI
11th January 2025
44AQI
44AQI
12th January 2025
45AQI
45AQI
13th January 2025
43AQI
43AQI
14th January 2025
71AQI
71AQI
15th January 2025
66AQI
66AQI
16th January 2025
74AQI
74AQI
17th January 2025
81AQI
81AQI
18th January 2025
66AQI
66AQI
19th January 2025
66AQI
66AQI
20th January 2025
58AQI
58AQI
21st January 2025
62AQI
62AQI
22nd January 2025
57AQI
57AQI
23rd January 2025
54AQI
54AQI
24th January 2025
71AQI
71AQI
25th January 2025
43AQI
43AQI
26th January 2025
35AQI
35AQI
27th January 2025
48AQI
48AQI
28th January 2025
55AQI
55AQI
29th January 2025
58AQI
58AQI
30th January 2025
65AQI
65AQI
31st January 2025
57AQI
57AQI
1st February 2025
50AQI
50AQI
2nd February 2025
37AQI
37AQI
3rd February 2025
33AQI
33AQI
4th February 2025
39AQI
39AQI
5th February 2025
32AQI
32AQI
6th February 2025
45AQI
45AQI
7th February 2025
30AQI
30AQI
8th February 2025
40AQI
40AQI
9th February 2025
34AQI
34AQI
10th February 2025
35AQI
35AQI
11th February 2025
44AQI
44AQI
12th February 2025
48AQI
48AQI
13th February 2025
38AQI
38AQI
14th February 2025
20AQI
20AQI
15th February 2025
20AQI
20AQI
16th February 2025
29AQI
29AQI
17th February 2025
23AQI
23AQI
18th February 2025
29AQI
29AQI
19th February 2025
38AQI
38AQI
20th February 2025
27AQI
27AQI
21st February 2025
27AQI
27AQI
22nd February 2025
33AQI
33AQI
23rd February 2025
25AQI
25AQI
24th February 2025
25AQI
25AQI
25th February 2025
23AQI
23AQI
26th February 2025
25AQI
25AQI
27th February 2025
30AQI
30AQI
28th February 2025
25AQI
25AQI
1st March 2025
23AQI
23AQI
2nd March 2025
23AQI
23AQI
3rd March 2025
19AQI
19AQI
4th March 2025
27AQI
27AQI
5th March 2025
31AQI
31AQI
6th March 2025
23AQI
23AQI
7th March 2025
26AQI
26AQI
8th March 2025
25AQI
25AQI
9th March 2025
26AQI
26AQI
10th March 2025
26AQI
26AQI
11th March 2025
22AQI
22AQI
12th March 2025
14AQI
14AQI
13th March 2025
25AQI
25AQI
14th March 2025
24AQI
24AQI
15th March 2025
32AQI
32AQI
16th March 2025
26AQI
26AQI
17th March 2025
29AQI
29AQI
18th March 2025
28AQI
28AQI
19th March 2025
35AQI
35AQI
20th March 2025
28AQI
28AQI
21st March 2025
28AQI
28AQI
22nd March 2025
30AQI
30AQI
23rd March 2025
28AQI
28AQI
24th March 2025
36AQI
36AQI
25th March 2025
34AQI
34AQI
26th March 2025
46AQI
46AQI
27th March 2025
22AQI
22AQI
28th March 2025
30AQI
30AQI
29th March 2025
31AQI
31AQI
30th March 2025
31AQI
31AQI
31st March 2025
25AQI
25AQI
1st April 2025
34AQI
34AQI
2nd April 2025
38AQI
38AQI
3rd April 2025
31AQI
31AQI
4th April 2025
31AQI
31AQI
5th April 2025
31AQI
31AQI
6th April 2025
29AQI
29AQI
7th April 2025
22AQI
22AQI
8th April 2025
29AQI
29AQI
9th April 2025
36AQI
36AQI
10th April 2025
34AQI
34AQI
11th April 2025
30AQI
30AQI
12th April 2025
26AQI
26AQI
13th April 2025
26AQI
26AQI
14th April 2025
30AQI
30AQI
15th April 2025
34AQI
34AQI
16th April 2025
36AQI
36AQI
17th April 2025
28AQI
28AQI
18th April 2025
24AQI
24AQI
19th April 2025
27AQI
27AQI
20th April 2025
25AQI
25AQI
21st April 2025
23AQI
23AQI
22nd April 2025
28AQI
28AQI
23rd April 2025
27AQI
27AQI
24th April 2025
31AQI
31AQI
25th April 2025
29AQI
29AQI
26th April 2025
28AQI
28AQI
27th April 2025
24AQI
24AQI
28th April 2025
24AQI
24AQI
29th April 2025
23AQI
23AQI
30th April 2025
24AQI
24AQI
1st May 2025
21AQI
21AQI
2nd May 2025
23AQI
23AQI
3rd May 2025
22AQI
22AQI
4th May 2025
20AQI
20AQI
5th May 2025
20AQI
20AQI
6th May 2025
19AQI
19AQI
7th May 2025
27AQI
27AQI
8th May 2025
23AQI
23AQI
9th May 2025
25AQI
25AQI
10th May 2025
24AQI
24AQI
11th May 2025
25AQI
25AQI
12th May 2025
30AQI
30AQI
13th May 2025
23AQI
23AQI
14th May 2025
23AQI
23AQI
15th May 2025
19AQI
19AQI
16th May 2025
20AQI
20AQI
17th May 2025
19AQI
19AQI
18th May 2025
19AQI
19AQI
19th May 2025
19AQI
19AQI
20th May 2025
17AQI
17AQI
21st May 2025
19AQI
19AQI
22nd May 2025
19AQI
19AQI
23rd May 2025
20AQI
20AQI
24th May 2025
23AQI
23AQI
25th May 2025
21AQI
21AQI
26th May 2025
17AQI
17AQI
27th May 2025
19AQI
19AQI
28th May 2025
22AQI
22AQI
29th May 2025
18AQI
18AQI
30th May 2025
20AQI
20AQI
31st May 2025
19AQI
19AQI
1st June 2025
21AQI
21AQI
2nd June 2025
18AQI
18AQI
3rd June 2025
20AQI
20AQI
4th June 2025
20AQI
20AQI
5th June 2025
24AQI
24AQI
6th June 2025
24AQI
24AQI
7th June 2025
26AQI
26AQI
8th June 2025
25AQI
25AQI
9th June 2025
28AQI
28AQI
10th June 2025
23AQI
23AQI
11th June 2025
29AQI
29AQI
12th June 2025
26AQI
26AQI
13th June 2025
24AQI
24AQI
14th June 2025
24AQI
24AQI
15th June 2025
22AQI
22AQI
16th June 2025
21AQI
21AQI
17th June 2025
22AQI
22AQI
18th June 2025
20AQI
20AQI
19th June 2025
20AQI
20AQI
20th June 2025
28AQI
28AQI
21st June 2025
25AQI
25AQI
22nd June 2025
25AQI
25AQI
23rd June 2025
24AQI
24AQI
24th June 2025
24AQI
24AQI
25th June 2025
28AQI
28AQI
26th June 2025
28AQI
28AQI
27th June 2025
28AQI
28AQI
28th June 2025
25AQI
25AQI
29th June 2025
24AQI
24AQI
30th June 2025
31AQI
31AQI
1st July 2025
29AQI
29AQI
2nd July 2025
25AQI
25AQI
3rd July 2025
29AQI
29AQI
4th July 2025
25AQI
25AQI
5th July 2025
24AQI
24AQI
6th July 2025
29AQI
29AQI
7th July 2025
40AQI
40AQI
8th July 2025
26AQI
26AQI
9th July 2025
21AQI
21AQI
10th July 2025
41AQI
41AQI
11th July 2025
53AQI
53AQI
12th July 2025
55AQI
55AQI
13th July 2025
59AQI
59AQI
14th July 2025
60AQI
60AQI
15th July 2025
47AQI
47AQI
16th July 2025
39AQI
39AQI
17th July 2025
34AQI
34AQI
18th July 2025
32AQI
32AQI
19th July 2025
31AQI
31AQI
20th July 2025
33AQI
33AQI
21st July 2025
27AQI
27AQI
22nd July 2025
18AQI
18AQI
23rd July 2025
18AQI
18AQI
24th July 2025
19AQI
19AQI
25th July 2025
22AQI
22AQI
26th July 2025
21AQI
21AQI
27th July 2025
23AQI
23AQI
28th July 2025
24AQI
24AQI
29th July 2025
25AQI
25AQI
30th July 2025
26AQI
26AQI
31st July 2025
22AQI
22AQI
1st August 2025
26AQI
26AQI
2nd August 2025
25AQI
25AQI
3rd August 2025
23AQI
23AQI
4th August 2025
23AQI
23AQI
5th August 2025
23AQI
23AQI
6th August 2025
23AQI
23AQI
7th August 2025
21AQI
21AQI
8th August 2025
23AQI
23AQI
9th August 2025
21AQI
21AQI
10th August 2025
22AQI
22AQI
11th August 2025
24AQI
24AQI
12th August 2025
28AQI
28AQI
57AQI
32AQI
28AQI
29AQI
21AQI
24AQI
32AQI
24AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202531AQI
8
23
28
31
30
31
30
27
4
12
197
27
Highest AQI recorded in
January57AQI
Lowest AQI recorded in
May21AQI
202434AQI
16
10
26
3
31
29
1
31
29
24
2
1
1
3
25
2
4
30
31
18
12
11
20
301
50
5
1
3
Highest AQI recorded in
December56AQI
Lowest AQI recorded in
May15AQI
202330AQI
2
5
12
13
26
5
30
31
23
20
25
6
3
22
9
200
32
Highest AQI recorded in
January56AQI
Lowest AQI recorded in
May13AQI
202238AQI
12
6
1
1
20
2
18
2
22
1
31
23
24
2
1
21
8
26
3
16
14
10
17
3
1
225
54
4
2
Highest AQI recorded in
December66AQI
Lowest AQI recorded in
July18AQI
202158AQI
9
21
19
9
31
30
21
16
1
3
3
8
5
1
5
8
7
9
12
11
5
2
27
4
20
10
10
6
199
70
21
12
11
Highest AQI recorded in
August160AQI
Lowest AQI recorded in
May19AQI
202044AQI
13
19
1
18
28
28
3
18
5
4
4
6
11
6
4
3
26
2
2
26
3
1
15
16
197
41
13
8
3
Highest AQI recorded in
September100AQI
Lowest AQI recorded in
June19AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2021(Avg.)
58AQILeast Polluted Year Recorded
2023(Avg.)
30AQIChester's annual 2025 AQI (31) shows an average percentage change of -18.6% (improved AQI) compared to previous years: 2020 (44), 2021 (58), 2022 (38), 2023 (30), 2024 (34).
