Contra Costa Centre, 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
Contra Costa Centre, California, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
28th Aug 2021
124AQILowest AQI recorded on
17th Aug 2024
11AQISame Day Analysis (13th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 22 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 13th Aug - 14th Aug 2025
Contra Costa Centre, California, United States
AQI
Day
Night
.
6 AM13th Aug 2025
8 PM
5 AM14th Aug 2025
Day time
Avg. Highest Time
6PM13th Aug
31AQI
Avg. Lowest Time
1PM13th Aug
18AQI
Night time
Avg. Highest Time
9PM13th Aug
30AQI
Avg. Lowest Time
2AM14th Aug
18AQI
In the last 24 hours,
Contra Costa Centre's AQI reached its highest point of 31 at 6 PM during the Day, while the lowest point, undefined, was recorded at 5 AM during the Night between 13th Aug and 14th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Contra Costa Centre, California, United States
JulAug
15th - 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 - 14th14th
Day
Night
15th Jul 2025146 AMAQI
15th Jul 2025147 AMAQI
15th Jul 2025148 AMAQI
15th Jul 2025159 AMAQI
15th Jul 20251510 AMAQI
15th Jul 20251411 AMAQI
15th Jul 20251612 PMAQI
15th Jul 2025171 PMAQI
15th Jul 2025152 PMAQI
15th Jul 2025163 PMAQI
15th Jul 2025174 PMAQI
15th Jul 2025185 PMAQI
15th Jul 2025196 PMAQI
15th Jul 2025187 PMAQI
15th Jul 2025198 PMAQI
15th Jul 2025209 PMAQI
15th Jul 20252310 PMAQI
15th Jul 20252411 PMAQI
16th Jul 20252412 AMAQI
16th Jul 2025251 AMAQI
16th Jul 2025242 AMAQI
16th Jul 2025243 AMAQI
16th Jul 2025254 AMAQI
16th Jul 2025195 AMAQI
16°C13/25°C
16th Jul 2025186 AMAQI
16th Jul 2025187 AMAQI
16th Jul 2025188 AMAQI
16th Jul 2025179 AMAQI
16th Jul 20251810 AMAQI
16th Jul 20251811 AMAQI
16th Jul 20251812 PMAQI
16th Jul 2025181 PMAQI
16th Jul 2025182 PMAQI
16th Jul 2025193 PMAQI
16th Jul 2025204 PMAQI
16th Jul 2025225 PMAQI
16th Jul 2025226 PMAQI
16th Jul 2025207 PMAQI
16th Jul 2025208 PMAQI
16th Jul 2025189 PMAQI
16th Jul 20251810 PMAQI
16th Jul 20252011 PMAQI
17th Jul 20252212 AMAQI
17th Jul 2025201 AMAQI
17th Jul 2025182 AMAQI
17th Jul 2025193 AMAQI
17th Jul 2025184 AMAQI
17th Jul 2025205 AMAQI
17°C14/22°C
17th Jul 2025206 AMAQI
17th Jul 2025187 AMAQI
17th Jul 2025168 AMAQI
17th Jul 2025159 AMAQI
17th Jul 20251610 AMAQI
17th Jul 20251711 AMAQI
17th Jul 20251612 PMAQI
17th Jul 2025181 PMAQI
17th Jul 2025172 PMAQI
17th Jul 2025173 PMAQI
17th Jul 2025184 PMAQI
17th Jul 2025195 PMAQI
17th Jul 2025196 PMAQI
17th Jul 2025187 PMAQI
17th Jul 2025188 PMAQI
17th Jul 2025189 PMAQI
17th Jul 20251810 PMAQI
17th Jul 20252011 PMAQI
18th Jul 20252112 AMAQI
18th Jul 2025191 AMAQI
18th Jul 2025202 AMAQI
18th Jul 2025193 AMAQI
18th Jul 2025134 AMAQI
18th Jul 2025165 AMAQI
19°C14/27°C
18th Jul 2025186 AMAQI
18th Jul 2025157 AMAQI
18th Jul 2025188 AMAQI
18th Jul 2025169 AMAQI
18th Jul 20251410 AMAQI
18th Jul 20251511 AMAQI
18th Jul 20251612 PMAQI
18th Jul 2025141 PMAQI
18th Jul 2025182 PMAQI
18th Jul 2025203 PMAQI
18th Jul 2025204 PMAQI
18th Jul 2025185 PMAQI
18th Jul 2025166 PMAQI
18th Jul 2025177 PMAQI
18th Jul 2025178 PMAQI
18th Jul 2025189 PMAQI
18th Jul 20251910 PMAQI
18th Jul 20252011 PMAQI
19th Jul 20251912 AMAQI
19th Jul 2025181 AMAQI
19th Jul 2025192 AMAQI
19th Jul 2025203 AMAQI
19th Jul 2025204 AMAQI
19th Jul 2025185 AMAQI
19°C14/27°C
19th Jul 2025186 AMAQI
19th Jul 2025207 AMAQI
19th Jul 2025188 AMAQI
19th Jul 2025189 AMAQI
19th Jul 20251910 AMAQI
19th Jul 20252811 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025221 PMAQI
19th Jul 2025202 PMAQI
19th Jul 2025213 PMAQI
19th Jul 2025204 PMAQI
19th Jul 2025195 PMAQI
19th Jul 2025206 PMAQI
19th Jul 2025207 PMAQI
19th Jul 2025208 PMAQI
19th Jul 2025229 PMAQI
19th Jul 20252210 PMAQI
19th Jul 20252211 PMAQI
20th Jul 20252012 AMAQI
20th Jul 2025181 AMAQI
20th Jul 2025202 AMAQI
20th Jul 2025213 AMAQI
20th Jul 2025214 AMAQI
20th Jul 2025205 AMAQI
18°C13/27°C
20th Jul 2025206 AMAQI
20th Jul 2025197 AMAQI
20th Jul 2025178 AMAQI
20th Jul 2025159 AMAQI
20th Jul 20251610 AMAQI
20th Jul 20251511 AMAQI
20th Jul 20251712 PMAQI
20th Jul 2025191 PMAQI
20th Jul 2025222 PMAQI
20th Jul 2025223 PMAQI
20th Jul 2025204 PMAQI
20th Jul 2025195 PMAQI
20th Jul 2025236 PMAQI
20th Jul 2025227 PMAQI
20th Jul 2025248 PMAQI
20th Jul 2025289 PMAQI
20th Jul 20252610 PMAQI
20th Jul 20252611 PMAQI
21st Jul 20252612 AMAQI
21st Jul 2025241 AMAQI
21st Jul 2025252 AMAQI
21st Jul 2025283 AMAQI
21st Jul 2025264 AMAQI
21st Jul 2025205 AMAQI
17°C12/24°C
21st Jul 2025216 AMAQI
21st Jul 2025237 AMAQI
21st Jul 2025218 AMAQI
21st Jul 2025229 AMAQI
21st Jul 20252110 AMAQI
21st Jul 20251811 AMAQI
21st Jul 20251712 PMAQI
21st Jul 2025161 PMAQI
21st Jul 2025192 PMAQI
21st Jul 2025213 PMAQI
21st Jul 2025204 PMAQI
21st Jul 2025205 PMAQI
21st Jul 2025206 PMAQI
21st Jul 2025237 PMAQI
21st Jul 2025238 PMAQI
21st Jul 2025189 PMAQI
21st Jul 20252010 PMAQI
21st Jul 20252011 PMAQI
22nd Jul 20251812 AMAQI
22nd Jul 2025161 AMAQI
22nd Jul 2025162 AMAQI
22nd Jul 2025153 AMAQI
22nd Jul 2025124 AMAQI
22nd Jul 2025145 AMAQI
16°C13/20°C
22nd Jul 2025146 AMAQI
22nd Jul 2025127 AMAQI
22nd Jul 2025138 AMAQI
22nd Jul 2025129 AMAQI
22nd Jul 20251310 AMAQI
22nd Jul 20251311 AMAQI
22nd Jul 20251312 PMAQI
22nd Jul 2025121 PMAQI
22nd Jul 2025132 PMAQI
22nd Jul 2025153 PMAQI
22nd Jul 2025144 PMAQI
22nd Jul 2025155 PMAQI
22nd Jul 2025146 PMAQI
22nd Jul 2025157 PMAQI
22nd Jul 2025148 PMAQI
22nd Jul 2025169 PMAQI
22nd Jul 20251610 PMAQI
22nd Jul 20251611 PMAQI
23rd Jul 20251512 AMAQI
23rd Jul 2025141 AMAQI
23rd Jul 2025142 AMAQI
23rd Jul 2025143 AMAQI
23rd Jul 2025124 AMAQI
23rd Jul 2025125 AMAQI
17°C14/23°C
23rd Jul 2025126 AMAQI
23rd Jul 2025127 AMAQI
23rd Jul 2025138 AMAQI
23rd Jul 2025169 AMAQI
23rd Jul 20251410 AMAQI
23rd Jul 20251611 AMAQI
23rd Jul 20251612 PMAQI
23rd Jul 2025161 PMAQI
23rd Jul 2025162 PMAQI
23rd Jul 2025143 PMAQI
23rd Jul 2025164 PMAQI
23rd Jul 2025155 PMAQI
23rd Jul 2025156 PMAQI
23rd Jul 2025157 PMAQI
23rd Jul 2025168 PMAQI
23rd Jul 2025159 PMAQI
23rd Jul 20251510 PMAQI
23rd Jul 20251611 PMAQI
24th Jul 20251512 AMAQI
24th Jul 2025151 AMAQI
24th Jul 2025142 AMAQI
24th Jul 2025153 AMAQI
24th Jul 2025144 AMAQI
24th Jul 2025135 AMAQI
18°C14/24°C
24th Jul 2025126 AMAQI
24th Jul 2025147 AMAQI
24th Jul 2025148 AMAQI
24th Jul 2025149 AMAQI
24th Jul 20251410 AMAQI
24th Jul 20251411 AMAQI
24th Jul 20251412 PMAQI
24th Jul 2025141 PMAQI
24th Jul 2025152 PMAQI
24th Jul 2025153 PMAQI
24th Jul 2025164 PMAQI
24th Jul 2025165 PMAQI
24th Jul 2025156 PMAQI
24th Jul 2025147 PMAQI
24th Jul 2025168 PMAQI
24th Jul 2025169 PMAQI
24th Jul 20251610 PMAQI
24th Jul 20251711 PMAQI
25th Jul 20251612 AMAQI
25th Jul 2025171 AMAQI
25th Jul 2025172 AMAQI
25th Jul 2025183 AMAQI
25th Jul 2025164 AMAQI
25th Jul 2025145 AMAQI
18°C14/25°C
25th Jul 2025146 AMAQI
25th Jul 2025147 AMAQI
25th Jul 2025148 AMAQI
25th Jul 2025149 AMAQI
25th Jul 20251410 AMAQI
25th Jul 20251411 AMAQI
25th Jul 20251412 PMAQI
25th Jul 2025141 PMAQI
25th Jul 2025152 PMAQI
25th Jul 2025153 PMAQI
25th Jul 2025164 PMAQI
25th Jul 2025165 PMAQI
25th Jul 2025166 PMAQI
25th Jul 2025167 PMAQI
25th Jul 2025168 PMAQI
25th Jul 2025169 PMAQI
25th Jul 20251610 PMAQI
25th Jul 20251611 PMAQI
26th Jul 20251612 AMAQI
26th Jul 2025161 AMAQI
26th Jul 2025162 AMAQI
26th Jul 2025153 AMAQI
26th Jul 2025144 AMAQI
26th Jul 2025145 AMAQI
17°C14/22°C
26th Jul 2025126 AMAQI
26th Jul 2025147 AMAQI
26th Jul 2025138 AMAQI
26th Jul 2025139 AMAQI
26th Jul 20251410 AMAQI
26th Jul 20251411 AMAQI
26th Jul 20251512 PMAQI
26th Jul 2025131 PMAQI
26th Jul 2025142 PMAQI
26th Jul 2025153 PMAQI
26th Jul 2025144 PMAQI
26th Jul 2025145 PMAQI
26th Jul 2025156 PMAQI
26th Jul 2025167 PMAQI
26th Jul 2025168 PMAQI
26th Jul 2025169 PMAQI
26th Jul 20251410 PMAQI
26th Jul 20251611 PMAQI
27th Jul 20251612 AMAQI
27th Jul 2025161 AMAQI
27th Jul 2025162 AMAQI
27th Jul 2025153 AMAQI
27th Jul 2025144 AMAQI
27th Jul 2025145 AMAQI
17°C14/22°C
27th Jul 2025146 AMAQI
27th Jul 2025157 AMAQI
27th Jul 2025148 AMAQI
27th Jul 2025149 AMAQI
27th Jul 20251410 AMAQI
27th Jul 20251411 AMAQI
27th Jul 20251412 PMAQI
27th Jul 2025141 PMAQI
27th Jul 2025142 PMAQI
27th Jul 2025153 PMAQI
27th Jul 2025154 PMAQI
27th Jul 2025155 PMAQI
27th Jul 2025166 PMAQI
27th Jul 2025157 PMAQI
27th Jul 2025168 PMAQI
27th Jul 2025169 PMAQI
27th Jul 20251710 PMAQI
27th Jul 20251711 PMAQI
28th Jul 20251812 AMAQI
28th Jul 2025181 AMAQI
28th Jul 2025192 AMAQI
28th Jul 2025193 AMAQI
28th Jul 2025194 AMAQI
28th Jul 2025195 AMAQI
17°C14/23°C
28th Jul 2025166 AMAQI
28th Jul 2025187 AMAQI
28th Jul 2025188 AMAQI
28th Jul 2025169 AMAQI
28th Jul 20251610 AMAQI
28th Jul 20251811 AMAQI
28th Jul 20251812 PMAQI
28th Jul 2025201 PMAQI
28th Jul 2025202 PMAQI
28th Jul 2025193 PMAQI
28th Jul 2025214 PMAQI
28th Jul 2025215 PMAQI
28th Jul 2025226 PMAQI
28th Jul 2025207 PMAQI
28th Jul 2025218 PMAQI
28th Jul 2025229 PMAQI
28th Jul 20252310 PMAQI
28th Jul 20252211 PMAQI
29th Jul 20252012 AMAQI
29th Jul 2025231 AMAQI
29th Jul 2025232 AMAQI
29th Jul 2025213 AMAQI
29th Jul 2025174 AMAQI
29th Jul 2025185 AMAQI
20°C14/29°C
29th Jul 2025186 AMAQI
29th Jul 2025207 AMAQI
29th Jul 2025208 AMAQI
29th Jul 2025209 AMAQI
29th Jul 20252310 AMAQI
29th Jul 20252311 AMAQI
29th Jul 20252012 PMAQI
29th Jul 2025211 PMAQI
29th Jul 2025232 PMAQI
29th Jul 2025233 PMAQI
29th Jul 2025244 PMAQI
29th Jul 2025245 PMAQI
29th Jul 2025256 PMAQI
29th Jul 2025247 PMAQI
29th Jul 2025238 PMAQI
29th Jul 2025249 PMAQI
29th Jul 20252310 PMAQI
29th Jul 20252211 PMAQI
30th Jul 20252212 AMAQI
30th Jul 2025221 AMAQI
30th Jul 2025232 AMAQI
30th Jul 2025233 AMAQI
30th Jul 2025224 AMAQI
30th Jul 2025185 AMAQI
19°C12/29°C
30th Jul 2025196 AMAQI
30th Jul 2025227 AMAQI
30th Jul 2025258 AMAQI
30th Jul 2025249 AMAQI
30th Jul 20252210 AMAQI
30th Jul 20251911 AMAQI
30th Jul 20251812 PMAQI
30th Jul 2025241 PMAQI
30th Jul 2025242 PMAQI
30th Jul 2025243 PMAQI
30th Jul 2025244 PMAQI
30th Jul 2025245 PMAQI
30th Jul 2025246 PMAQI
30th Jul 2025247 PMAQI
30th Jul 2025248 PMAQI
30th Jul 2025249 PMAQI
30th Jul 20252510 PMAQI
30th Jul 20252411 PMAQI
31st Jul 20252312 AMAQI
31st Jul 2025231 AMAQI
31st Jul 2025242 AMAQI
31st Jul 2025223 AMAQI
31st Jul 2025204 AMAQI
31st Jul 2025155 AMAQI
17°C13/23°C
31st Jul 2025186 AMAQI
31st Jul 2025227 AMAQI
31st Jul 2025228 AMAQI
31st Jul 2025209 AMAQI
31st Jul 20251910 AMAQI
31st Jul 20251811 AMAQI
31st Jul 20252212 PMAQI
31st Jul 2025201 PMAQI
31st Jul 2025222 PMAQI
31st Jul 2025223 PMAQI
31st Jul 2025284 PMAQI
31st Jul 2025285 PMAQI
31st Jul 2025286 PMAQI
31st Jul 2025237 PMAQI
31st Jul 2025288 PMAQI
31st Jul 2025329 PMAQI
31st Jul 20253010 PMAQI
31st Jul 20252711 PMAQI
1st Aug 20252912 AMAQI
1st Aug 2025251 AMAQI
1st Aug 2025242 AMAQI
1st Aug 2025233 AMAQI
1st Aug 2025214 AMAQI
1st Aug 2025275 AMAQI
20°C14/30°C
1st Aug 2025216 AMAQI
1st Aug 2025167 AMAQI
1st Aug 2025188 AMAQI
1st Aug 2025179 AMAQI
1st Aug 20251810 AMAQI
1st Aug 20251811 AMAQI
1st Aug 20252012 PMAQI
1st Aug 2025221 PMAQI
1st Aug 2025242 PMAQI
1st Aug 2025253 PMAQI
1st Aug 2025274 PMAQI
1st Aug 2025285 PMAQI
1st Aug 2025286 PMAQI
1st Aug 2025247 PMAQI
1st Aug 2025248 PMAQI
1st Aug 2025259 PMAQI
1st Aug 20252610 PMAQI
1st Aug 20252611 PMAQI
2nd Aug 20252412 AMAQI
2nd Aug 2025221 AMAQI
2nd Aug 2025202 AMAQI
2nd Aug 2025223 AMAQI
2nd Aug 2025224 AMAQI
2nd Aug 2025225 AMAQI
19°C14/27°C
2nd Aug 2025226 AMAQI
2nd Aug 2025227 AMAQI
2nd Aug 2025188 AMAQI
2nd Aug 2025189 AMAQI
2nd Aug 20251610 AMAQI
2nd Aug 20251811 AMAQI
2nd Aug 20251812 PMAQI
2nd Aug 2025181 PMAQI
2nd Aug 2025162 PMAQI
2nd Aug 2025183 PMAQI
2nd Aug 2025204 PMAQI
2nd Aug 2025205 PMAQI
2nd Aug 2025226 PMAQI
2nd Aug 2025227 PMAQI
2nd Aug 2025208 PMAQI
2nd Aug 2025209 PMAQI
2nd Aug 20252110 PMAQI
2nd Aug 20252011 PMAQI
3rd Aug 20252212 AMAQI
3rd Aug 2025241 AMAQI
3rd Aug 2025242 AMAQI
3rd Aug 2025263 AMAQI
3rd Aug 2025244 AMAQI
3rd Aug 2025215 AMAQI
19°C14/29°C
3rd Aug 2025226 AMAQI
3rd Aug 2025207 AMAQI
3rd Aug 2025288 AMAQI
3rd Aug 2025299 AMAQI
3rd Aug 20253210 AMAQI
3rd Aug 20253511 AMAQI
3rd Aug 20254012 PMAQI
3rd Aug 2025441 PMAQI
3rd Aug 2025452 PMAQI
3rd Aug 2025483 PMAQI
3rd Aug 2025444 PMAQI
3rd Aug 2025375 PMAQI
3rd Aug 2025376 PMAQI
3rd Aug 2025307 PMAQI
3rd Aug 2025388 PMAQI
3rd Aug 2025409 PMAQI
3rd Aug 20254510 PMAQI
3rd Aug 20254711 PMAQI
4th Aug 20254012 AMAQI
4th Aug 2025381 AMAQI
4th Aug 2025352 AMAQI
4th Aug 2025373 AMAQI
4th Aug 2025364 AMAQI
4th Aug 2025365 AMAQI
19°C13/28°C
4th Aug 2025326 AMAQI
4th Aug 2025347 AMAQI
4th Aug 2025318 AMAQI
4th Aug 2025309 AMAQI
4th Aug 20253410 AMAQI
4th Aug 20253611 AMAQI
4th Aug 20253912 PMAQI
4th Aug 2025401 PMAQI
4th Aug 2025382 PMAQI
4th Aug 2025353 PMAQI
4th Aug 2025344 PMAQI
4th Aug 2025345 PMAQI
4th Aug 2025346 PMAQI
4th Aug 2025357 PMAQI
4th Aug 2025328 PMAQI
4th Aug 2025319 PMAQI
4th Aug 20253010 PMAQI
4th Aug 20252911 PMAQI
5th Aug 20252912 AMAQI
5th Aug 2025281 AMAQI
5th Aug 2025282 AMAQI
5th Aug 2025263 AMAQI
5th Aug 2025244 AMAQI
5th Aug 2025285 AMAQI
20°C12/29°C
5th Aug 2025296 AMAQI
5th Aug 2025237 AMAQI
5th Aug 2025258 AMAQI
5th Aug 2025299 AMAQI
5th Aug 20253310 AMAQI
5th Aug 20253211 AMAQI
5th Aug 20253012 PMAQI
5th Aug 2025321 PMAQI
5th Aug 2025282 PMAQI
5th Aug 2025303 PMAQI
5th Aug 2025354 PMAQI
5th Aug 2025345 PMAQI
5th Aug 2025346 PMAQI
5th Aug 2025287 PMAQI
5th Aug 2025318 PMAQI
5th Aug 2025329 PMAQI
5th Aug 20253810 PMAQI
5th Aug 20253411 PMAQI
6th Aug 20253412 AMAQI
6th Aug 2025331 AMAQI
6th Aug 2025312 AMAQI
6th Aug 2025293 AMAQI
6th Aug 2025284 AMAQI
6th Aug 2025295 AMAQI
18°C11/28°C
6th Aug 2025306 AMAQI
6th Aug 2025327 AMAQI
6th Aug 2025318 AMAQI
6th Aug 2025329 AMAQI
6th Aug 20253210 AMAQI
6th Aug 20253111 AMAQI
6th Aug 20253412 PMAQI
6th Aug 2025331 PMAQI
6th Aug 2025372 PMAQI
6th Aug 2025353 PMAQI
6th Aug 2025364 PMAQI
6th Aug 2025345 PMAQI
6th Aug 2025336 PMAQI
6th Aug 2025327 PMAQI
6th Aug 2025318 PMAQI
6th Aug 2025319 PMAQI
6th Aug 20253110 PMAQI
6th Aug 20253011 PMAQI
7th Aug 20253112 AMAQI
7th Aug 2025281 AMAQI
7th Aug 2025282 AMAQI
7th Aug 2025273 AMAQI
7th Aug 2025184 AMAQI
7th Aug 2025185 AMAQI
22°C12/35°C
7th Aug 2025206 AMAQI
7th Aug 2025267 AMAQI
7th Aug 2025208 AMAQI
7th Aug 2025199 AMAQI
7th Aug 20252210 AMAQI
7th Aug 20253011 AMAQI
7th Aug 20252512 PMAQI
7th Aug 2025231 PMAQI
7th Aug 2025242 PMAQI
7th Aug 2025263 PMAQI
7th Aug 2025244 PMAQI
7th Aug 2025235 PMAQI
7th Aug 2025226 PMAQI
7th Aug 2025257 PMAQI
7th Aug 2025248 PMAQI
7th Aug 2025239 PMAQI
7th Aug 20252310 PMAQI
7th Aug 20252311 PMAQI
8th Aug 20252412 AMAQI
8th Aug 2025251 AMAQI
8th Aug 2025262 AMAQI
8th Aug 2025263 AMAQI
8th Aug 2025244 AMAQI
8th Aug 2025185 AMAQI
21°C14/32°C
8th Aug 2025196 AMAQI
8th Aug 2025247 AMAQI
8th Aug 2025318 AMAQI
8th Aug 2025309 AMAQI
8th Aug 20253810 AMAQI
8th Aug 20253711 AMAQI
8th Aug 20253312 PMAQI
8th Aug 2025321 PMAQI
8th Aug 2025292 PMAQI
8th Aug 2025343 PMAQI
8th Aug 2025344 PMAQI
8th Aug 2025335 PMAQI
8th Aug 2025326 PMAQI
8th Aug 2025307 PMAQI
8th Aug 2025308 PMAQI
8th Aug 2025289 PMAQI
8th Aug 20252810 PMAQI
8th Aug 20253011 PMAQI
9th Aug 20252912 AMAQI
9th Aug 2025291 AMAQI
9th Aug 2025322 AMAQI
9th Aug 2025323 AMAQI
9th Aug 2025324 AMAQI
9th Aug 2025405 AMAQI
22°C12/36°C
9th Aug 2025396 AMAQI
9th Aug 2025397 AMAQI
9th Aug 2025338 AMAQI
9th Aug 2025289 AMAQI
9th Aug 20252610 AMAQI
9th Aug 20253311 AMAQI
9th Aug 20253312 PMAQI
9th Aug 2025311 PMAQI
9th Aug 2025342 PMAQI
9th Aug 2025363 PMAQI
9th Aug 2025344 PMAQI
9th Aug 2025355 PMAQI
9th Aug 2025336 PMAQI
9th Aug 2025357 PMAQI
9th Aug 2025348 PMAQI
9th Aug 2025319 PMAQI
9th Aug 20252910 PMAQI
9th Aug 20253011 PMAQI
10th Aug 20253212 AMAQI
10th Aug 2025321 AMAQI
10th Aug 2025322 AMAQI
10th Aug 2025293 AMAQI
10th Aug 2025294 AMAQI
10th Aug 2025345 AMAQI
23°C14/33°C
10th Aug 2025346 AMAQI
10th Aug 2025377 AMAQI
10th Aug 2025268 AMAQI
10th Aug 2025279 AMAQI
10th Aug 20252410 AMAQI
10th Aug 20252211 AMAQI
10th Aug 20252112 PMAQI
10th Aug 2025261 PMAQI
10th Aug 2025292 PMAQI
10th Aug 2025283 PMAQI
10th Aug 2025284 PMAQI
10th Aug 2025285 PMAQI
10th Aug 2025286 PMAQI
10th Aug 2025287 PMAQI
10th Aug 2025268 PMAQI
10th Aug 2025279 PMAQI
10th Aug 20252710 PMAQI
10th Aug 20252611 PMAQI
11th Aug 20252812 AMAQI
11th Aug 2025231 AMAQI
11th Aug 2025252 AMAQI
11th Aug 2025183 AMAQI
11th Aug 2025224 AMAQI
11th Aug 2025205 AMAQI
21°C13/34°C
11th Aug 2025216 AMAQI
11th Aug 2025247 AMAQI
11th Aug 2025238 AMAQI
11th Aug 2025219 AMAQI
11th Aug 20252610 AMAQI
11th Aug 20252411 AMAQI
11th Aug 20252412 PMAQI
11th Aug 2025261 PMAQI
11th Aug 2025282 PMAQI
11th Aug 2025323 PMAQI
11th Aug 2025324 PMAQI
11th Aug 2025355 PMAQI
11th Aug 2025366 PMAQI
11th Aug 2025257 PMAQI
11th Aug 2025328 PMAQI
11th Aug 2025349 PMAQI
11th Aug 20253610 PMAQI
11th Aug 20253011 PMAQI
12th Aug 20252812 AMAQI
12th Aug 2025231 AMAQI
12th Aug 2025222 AMAQI
12th Aug 2025223 AMAQI
12th Aug 2025244 AMAQI
12th Aug 2025225 AMAQI
19°C11/29°C
12th Aug 2025216 AMAQI
12th Aug 2025217 AMAQI
12th Aug 2025238 AMAQI
12th Aug 2025229 AMAQI
12th Aug 20252210 AMAQI
12th Aug 20252011 AMAQI
12th Aug 20252312 PMAQI
12th Aug 2025241 PMAQI
12th Aug 2025252 PMAQI
12th Aug 2025323 PMAQI
12th Aug 2025364 PMAQI
12th Aug 2025395 PMAQI
12th Aug 2025386 PMAQI
12th Aug 2025337 PMAQI
12th Aug 2025348 PMAQI
12th Aug 2025369 PMAQI
12th Aug 20253810 PMAQI
12th Aug 20253411 PMAQI
13th Aug 20252612 AMAQI
13th Aug 2025261 AMAQI
13th Aug 2025242 AMAQI
13th Aug 2025223 AMAQI
13th Aug 2025224 AMAQI
13th Aug 2025225 AMAQI
18°C14/28°C
13th Aug 2025216 AMAQI
13th Aug 2025207 AMAQI
13th Aug 2025198 AMAQI
13th Aug 2025189 AMAQI
13th Aug 20251810 AMAQI
13th Aug 20252011 AMAQI
13th Aug 20251912 PMAQI
13th Aug 2025181 PMAQI
13th Aug 2025202 PMAQI
13th Aug 2025243 PMAQI
13th Aug 2025254 PMAQI
13th Aug 2025275 PMAQI
13th Aug 2025316 PMAQI
13th Aug 2025237 PMAQI
13th Aug 2025268 PMAQI
13th Aug 2025309 PMAQI
13th Aug 20252710 PMAQI
13th Aug 20252511 PMAQI
14th Aug 20252212 AMAQI
14th Aug 2025191 AMAQI
14th Aug 2025182 AMAQI
19°C14/25°C
6 AM
1 PM
8 PM
1 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 AM - 6 PM
22AQI
13 hours / Day
390 hours / Month
Avg. Lowest Time
6 AM - 8 PM
22AQI
15 hours / Day
450 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 6 PM (Avg. 22), while the lowest AQI was between 6 AM to 8 PM (Avg. 22).
Night time
Avg. Highest Time
9 PM - 11 PM
24AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
12 AM - 5 AM
22AQI
6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 11 PM (Avg. 24), while the lowest AQI was between 12 AM to 5 AM (Avg. 22).
2025 Days Vs Air Quality
Contra Costa Centre, California, United States
2025
100%
224
0.4%
1
Total number of days with different AQI categories in last 226 days in 2025 (139 days remaining)
Good
224 DaysModerate
1 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2025, 100% of 226 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
Contra Costa Centre, 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
46AQI
46AQI
2nd January 2025
40AQI
40AQI
3rd January 2025
34AQI
34AQI
4th January 2025
24AQI
24AQI
5th January 2025
30AQI
30AQI
6th January 2025
31AQI
31AQI
7th January 2025
25AQI
25AQI
8th January 2025
23AQI
23AQI
9th January 2025
30AQI
30AQI
10th January 2025
48AQI
48AQI
11th January 2025
30AQI
30AQI
12th January 2025
25AQI
25AQI
13th January 2025
29AQI
29AQI
14th January 2025
26AQI
26AQI
15th January 2025
42AQI
42AQI
16th January 2025
50AQI
50AQI
17th January 2025
39AQI
39AQI
18th January 2025
38AQI
38AQI
19th January 2025
49AQI
49AQI
20th January 2025
34AQI
34AQI
21st January 2025
37AQI
37AQI
22nd January 2025
36AQI
36AQI
23rd January 2025
43AQI
43AQI
24th January 2025
53AQI
53AQI
25th January 2025
44AQI
44AQI
26th January 2025
29AQI
29AQI
27th January 2025
27AQI
27AQI
28th January 2025
35AQI
35AQI
29th January 2025
34AQI
34AQI
30th January 2025
39AQI
39AQI
31st January 2025
37AQI
37AQI
1st February 2025
43AQI
43AQI
2nd February 2025
20AQI
20AQI
3rd February 2025
21AQI
21AQI
4th February 2025
20AQI
20AQI
5th February 2025
25AQI
25AQI
6th February 2025
23AQI
23AQI
7th February 2025
24AQI
24AQI
8th February 2025
22AQI
22AQI
9th February 2025
25AQI
25AQI
10th February 2025
24AQI
24AQI
11th February 2025
24AQI
24AQI
12th February 2025
24AQI
24AQI
13th February 2025
34AQI
34AQI
14th February 2025
27AQI
27AQI
15th February 2025
25AQI
25AQI
16th February 2025
22AQI
22AQI
17th February 2025
21AQI
21AQI
18th February 2025
21AQI
21AQI
19th February 2025
22AQI
22AQI
20th February 2025
23AQI
23AQI
21st February 2025
21AQI
21AQI
22nd February 2025
26AQI
26AQI
23rd February 2025
23AQI
23AQI
24th February 2025
21AQI
21AQI
25th February 2025
21AQI
21AQI
26th February 2025
23AQI
23AQI
27th February 2025
24AQI
24AQI
28th February 2025
28AQI
28AQI
1st March 2025
27AQI
27AQI
2nd March 2025
24AQI
24AQI
3rd March 2025
22AQI
22AQI
4th March 2025
21AQI
21AQI
5th March 2025
21AQI
21AQI
6th March 2025
25AQI
25AQI
7th March 2025
22AQI
22AQI
8th March 2025
23AQI
23AQI
9th March 2025
27AQI
27AQI
10th March 2025
25AQI
25AQI
11th March 2025
25AQI
25AQI
12th March 2025
25AQI
25AQI
13th March 2025
19AQI
19AQI
14th March 2025
19AQI
19AQI
15th March 2025
47AQI
47AQI
16th March 2025
30AQI
30AQI
17th March 2025
16AQI
16AQI
18th March 2025
23AQI
23AQI
19th March 2025
20AQI
20AQI
20th March 2025
15AQI
15AQI
21st March 2025
19AQI
19AQI
22nd March 2025
18AQI
18AQI
23rd March 2025
23AQI
23AQI
24th March 2025
22AQI
22AQI
25th March 2025
24AQI
24AQI
26th March 2025
21AQI
21AQI
27th March 2025
18AQI
18AQI
28th March 2025
21AQI
21AQI
29th March 2025
17AQI
17AQI
30th March 2025
19AQI
19AQI
31st March 2025
19AQI
19AQI
1st April 2025
18AQI
18AQI
2nd April 2025
19AQI
19AQI
3rd April 2025
19AQI
19AQI
4th April 2025
17AQI
17AQI
5th April 2025
16AQI
16AQI
6th April 2025
16AQI
16AQI
7th April 2025
14AQI
14AQI
8th April 2025
14AQI
14AQI
9th April 2025
20AQI
20AQI
10th April 2025
19AQI
19AQI
11th April 2025
18AQI
18AQI
12th April 2025
27AQI
27AQI
13th April 2025
30AQI
30AQI
14th April 2025
22AQI
22AQI
15th April 2025
26AQI
26AQI
16th April 2025
26AQI
26AQI
17th April 2025
22AQI
22AQI
18th April 2025
21AQI
21AQI
19th April 2025
27AQI
27AQI
20th April 2025
23AQI
23AQI
21st April 2025
21AQI
21AQI
22nd April 2025
35AQI
35AQI
23rd April 2025
42AQI
42AQI
24th April 2025
30AQI
30AQI
25th April 2025
18AQI
18AQI
26th April 2025
15AQI
15AQI
27th April 2025
19AQI
19AQI
28th April 2025
22AQI
22AQI
29th April 2025
23AQI
23AQI
30th April 2025
27AQI
27AQI
1st May 2025
36AQI
36AQI
2nd May 2025
26AQI
26AQI
3rd May 2025
21AQI
21AQI
4th May 2025
27AQI
27AQI
5th May 2025
21AQI
21AQI
6th May 2025
32AQI
32AQI
7th May 2025
41AQI
41AQI
8th May 2025
28AQI
28AQI
9th May 2025
22AQI
22AQI
10th May 2025
18AQI
18AQI
11th May 2025
19AQI
19AQI
12th May 2025
19AQI
19AQI
13th May 2025
16AQI
16AQI
14th May 2025
26AQI
26AQI
15th May 2025
28AQI
28AQI
16th May 2025
35AQI
35AQI
17th May 2025
22AQI
22AQI
18th May 2025
19AQI
19AQI
19th May 2025
21AQI
21AQI
20th May 2025
17AQI
17AQI
21st May 2025
30AQI
30AQI
22nd May 2025
28AQI
28AQI
23rd May 2025
19AQI
19AQI
24th May 2025
25AQI
25AQI
25th May 2025
17AQI
17AQI
26th May 2025
15AQI
15AQI
27th May 2025
19AQI
19AQI
28th May 2025
20AQI
20AQI
29th May 2025
16AQI
16AQI
30th May 2025
22AQI
22AQI
31st May 2025
32AQI
32AQI
1st June 2025
47AQI
47AQI
2nd June 2025
45AQI
45AQI
3rd June 2025
27AQI
27AQI
4th June 2025
42AQI
42AQI
5th June 2025
26AQI
26AQI
6th June 2025
20AQI
20AQI
7th June 2025
21AQI
21AQI
8th June 2025
18AQI
18AQI
9th June 2025
16AQI
16AQI
10th June 2025
18AQI
18AQI
11th June 2025
34AQI
34AQI
12th June 2025
40AQI
40AQI
13th June 2025
41AQI
41AQI
14th June 2025
37AQI
37AQI
15th June 2025
37AQI
37AQI
16th June 2025
36AQI
36AQI
17th June 2025
28AQI
28AQI
18th June 2025
26AQI
26AQI
19th June 2025
36AQI
36AQI
20th June 2025
35AQI
35AQI
21st June 2025
34AQI
34AQI
22nd June 2025
32AQI
32AQI
23rd June 2025
27AQI
27AQI
24th June 2025
22AQI
22AQI
25th June 2025
20AQI
20AQI
26th June 2025
23AQI
23AQI
27th June 2025
28AQI
28AQI
28th June 2025
32AQI
32AQI
29th June 2025
27AQI
27AQI
30th June 2025
22AQI
22AQI
1st July 2025
26AQI
26AQI
2nd July 2025
25AQI
25AQI
3rd July 2025
36AQI
36AQI
4th July 2025
31AQI
31AQI
5th July 2025
32AQI
32AQI
6th July 2025
32AQI
32AQI
7th July 2025
22AQI
22AQI
8th July 2025
19AQI
19AQI
9th July 2025
17AQI
17AQI
10th July 2025
22AQI
22AQI
11th July 2025
36AQI
36AQI
12th July 2025
39AQI
39AQI
13th July 2025
30AQI
30AQI
14th July 2025
19AQI
19AQI
15th July 2025
18AQI
18AQI
16th July 2025
20AQI
20AQI
17th July 2025
18AQI
18AQI
18th July 2025
18AQI
18AQI
19th July 2025
20AQI
20AQI
20th July 2025
21AQI
21AQI
21st July 2025
22AQI
22AQI
22nd July 2025
15AQI
15AQI
23rd July 2025
14AQI
14AQI
24th July 2025
15AQI
15AQI
25th July 2025
15AQI
15AQI
26th July 2025
15AQI
15AQI
27th July 2025
15AQI
15AQI
28th July 2025
19AQI
19AQI
29th July 2025
22AQI
22AQI
30th July 2025
23AQI
23AQI
31st July 2025
23AQI
23AQI
1st August 2025
24AQI
24AQI
2nd August 2025
20AQI
20AQI
3rd August 2025
33AQI
33AQI
4th August 2025
35AQI
35AQI
5th August 2025
30AQI
30AQI
6th August 2025
32AQI
32AQI
7th August 2025
24AQI
24AQI
8th August 2025
28AQI
28AQI
9th August 2025
33AQI
33AQI
10th August 2025
28AQI
28AQI
11th August 2025
27AQI
27AQI
12th August 2025
28AQI
28AQI
13th August 2025
22AQI
22AQI
36AQI
24AQI
22AQI
22AQI
24AQI
30AQI
23AQI
28AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202526AQI
30
1
28
31
30
31
30
31
13
224
1
Highest AQI recorded in
January36AQI
Lowest AQI recorded in
April22AQI
202429AQI
25
1
26
4
2
14
27
2
30
1
31
30
31
27
3
22
9
269
16
Highest AQI recorded in
December41AQI
Lowest AQI recorded in
April15AQI
202329AQI
31
27
1
30
30
31
30
28
3
28
3
25
4
1
31
28
1
26
5
345
17
1
Highest AQI recorded in
December35AQI
Lowest AQI recorded in
March24AQI
202232AQI
20
10
21
1
27
1
29
1
31
30
22
2
27
2
31
28
2
21
10
289
27
Highest AQI recorded in
January44AQI
Lowest AQI recorded in
July22AQI
202135AQI
26
4
27
1
28
29
1
31
29
1
31
17
12
2
24
6
30
1
19
11
21
10
312
47
2
Highest AQI recorded in
August49AQI
Lowest AQI recorded in
June26AQI
202043AQI
13
20
18
30
31
20
5
6
10
14
2
4
20
9
1
1
28
2
21
10
211
40
9
5
Highest AQI recorded in
September76AQI
Lowest AQI recorded in
March27AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2020(Avg.)
43AQILeast Polluted Year Recorded
2025(Avg.)
26AQIContra Costa Centre's annual 2025 AQI (26) shows an average percentage change of -21.4% (improved AQI) compared to previous years: 2020 (43), 2021 (35), 2022 (32), 2023 (29), 2024 (29).
