Highway 99, Eugene, Oregon, 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
Highway 99, Eugene, Oregon, United States
2021
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
12th Aug 2021
88AQILowest AQI recorded on
7th Aug 2021
8AQISame Day Analysis (1st August ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 3rd highest AQI at 19 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 1st Aug - 2nd Aug 2025
Highway 99, Eugene, Oregon, United States
AQI
Day
Night
.
5 AM1st Aug 2025
8 PM
4 AM2nd Aug 2025
Day time
Avg. Highest Time
4PM1st Aug
20AQI
Avg. Lowest Time
10AM1st Aug
14AQI
Night time
Avg. Highest Time
11PM1st Aug
20AQI
Avg. Lowest Time
4AM2nd Aug
18AQI
In the last 24 hours,
Highway 99's AQI reached its highest point of 20 at 4 PM during the Day, while the lowest point, 14, was recorded at 10 AM during the Day between 1st Aug and 2nd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Highway 99, Eugene, Oregon, United States
JulAug
03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd
Day
Night
3rd Jul 2025185 AMAQI
3rd Jul 2025176 AMAQI
3rd Jul 2025177 AMAQI
3rd Jul 2025188 AMAQI
3rd Jul 2025169 AMAQI
3rd Jul 20251410 AMAQI
3rd Jul 20251611 AMAQI
3rd Jul 20251712 PMAQI
3rd Jul 2025181 PMAQI
3rd Jul 2025182 PMAQI
3rd Jul 2025203 PMAQI
3rd Jul 2025184 PMAQI
3rd Jul 2025195 PMAQI
3rd Jul 2025186 PMAQI
3rd Jul 2025187 PMAQI
3rd Jul 2025178 PMAQI
3rd Jul 2025189 PMAQI
3rd Jul 20251810 PMAQI
3rd Jul 20251911 PMAQI
4th Jul 20251912 AMAQI
4th Jul 2025191 AMAQI
4th Jul 2025202 AMAQI
4th Jul 2025183 AMAQI
4th Jul 2025164 AMAQI
18°C13/25°C
4th Jul 2025165 AMAQI
4th Jul 2025186 AMAQI
4th Jul 2025187 AMAQI
4th Jul 2025188 AMAQI
4th Jul 2025189 AMAQI
4th Jul 20251910 AMAQI
4th Jul 20251811 AMAQI
4th Jul 20251812 PMAQI
4th Jul 2025171 PMAQI
4th Jul 2025182 PMAQI
4th Jul 2025193 PMAQI
4th Jul 2025184 PMAQI
4th Jul 2025185 PMAQI
4th Jul 2025186 PMAQI
4th Jul 2025187 PMAQI
4th Jul 2025188 PMAQI
4th Jul 2025209 PMAQI
4th Jul 20252010 PMAQI
4th Jul 20252111 PMAQI
5th Jul 20252112 AMAQI
5th Jul 2025251 AMAQI
5th Jul 2025182 AMAQI
5th Jul 2025203 AMAQI
5th Jul 2025294 AMAQI
16°C11/22°C
5th Jul 2025345 AMAQI
5th Jul 2025276 AMAQI
5th Jul 2025247 AMAQI
5th Jul 2025218 AMAQI
5th Jul 2025229 AMAQI
5th Jul 20252110 AMAQI
5th Jul 20252611 AMAQI
5th Jul 20252512 PMAQI
5th Jul 2025231 PMAQI
5th Jul 2025282 PMAQI
5th Jul 2025253 PMAQI
5th Jul 2025244 PMAQI
5th Jul 2025245 PMAQI
5th Jul 2025246 PMAQI
5th Jul 2025247 PMAQI
5th Jul 2025238 PMAQI
5th Jul 2025239 PMAQI
5th Jul 20252210 PMAQI
5th Jul 20252411 PMAQI
6th Jul 20252412 AMAQI
6th Jul 2025251 AMAQI
6th Jul 2025262 AMAQI
6th Jul 2025273 AMAQI
6th Jul 2025284 AMAQI
18°C11/28°C
6th Jul 2025245 AMAQI
6th Jul 2025296 AMAQI
6th Jul 2025257 AMAQI
6th Jul 2025258 AMAQI
6th Jul 2025259 AMAQI
6th Jul 20252410 AMAQI
6th Jul 20252411 AMAQI
6th Jul 20252712 PMAQI
6th Jul 2025241 PMAQI
6th Jul 2025252 PMAQI
6th Jul 2025263 PMAQI
6th Jul 2025254 PMAQI
6th Jul 2025255 PMAQI
6th Jul 2025256 PMAQI
6th Jul 2025257 PMAQI
6th Jul 2025248 PMAQI
6th Jul 2025249 PMAQI
6th Jul 20252210 PMAQI
6th Jul 20252411 PMAQI
7th Jul 20252312 AMAQI
7th Jul 2025231 AMAQI
7th Jul 2025262 AMAQI
7th Jul 2025243 AMAQI
7th Jul 2025264 AMAQI
20°C11/31°C
7th Jul 2025245 AMAQI
7th Jul 2025246 AMAQI
7th Jul 2025237 AMAQI
7th Jul 2025248 AMAQI
7th Jul 2025249 AMAQI
7th Jul 20252610 AMAQI
7th Jul 20252811 AMAQI
7th Jul 20252612 PMAQI
7th Jul 2025251 PMAQI
7th Jul 2025262 PMAQI
7th Jul 2025273 PMAQI
7th Jul 2025254 PMAQI
7th Jul 2025245 PMAQI
7th Jul 2025256 PMAQI
7th Jul 2025247 PMAQI
7th Jul 2025258 PMAQI
7th Jul 2025249 PMAQI
7th Jul 20252210 PMAQI
7th Jul 20252211 PMAQI
8th Jul 20252512 AMAQI
8th Jul 2025241 AMAQI
8th Jul 2025262 AMAQI
8th Jul 2025253 AMAQI
8th Jul 2025254 AMAQI
23°C13/33°C
8th Jul 2025275 AMAQI
8th Jul 2025316 AMAQI
8th Jul 2025287 AMAQI
8th Jul 2025288 AMAQI
8th Jul 2025319 AMAQI
8th Jul 20253110 AMAQI
8th Jul 20253611 AMAQI
8th Jul 20253112 PMAQI
8th Jul 2025341 PMAQI
8th Jul 2025342 PMAQI
8th Jul 2025343 PMAQI
8th Jul 2025324 PMAQI
8th Jul 2025315 PMAQI
8th Jul 2025316 PMAQI
8th Jul 2025307 PMAQI
8th Jul 2025288 PMAQI
8th Jul 2025279 PMAQI
8th Jul 20252710 PMAQI
8th Jul 20252611 PMAQI
9th Jul 20252512 AMAQI
9th Jul 2025231 AMAQI
9th Jul 2025222 AMAQI
9th Jul 2025183 AMAQI
9th Jul 2025154 AMAQI
21°C14/32°C
9th Jul 2025145 AMAQI
9th Jul 2025156 AMAQI
9th Jul 2025167 AMAQI
9th Jul 2025178 AMAQI
9th Jul 2025169 AMAQI
9th Jul 20251710 AMAQI
9th Jul 20251811 AMAQI
9th Jul 20251912 PMAQI
9th Jul 2025191 PMAQI
9th Jul 2025202 PMAQI
9th Jul 2025193 PMAQI
9th Jul 2025184 PMAQI
9th Jul 2025195 PMAQI
9th Jul 2025186 PMAQI
9th Jul 2025187 PMAQI
9th Jul 2025188 PMAQI
9th Jul 2025209 PMAQI
9th Jul 20252010 PMAQI
9th Jul 20251811 PMAQI
10th Jul 20251812 AMAQI
10th Jul 2025181 AMAQI
10th Jul 2025182 AMAQI
10th Jul 2025183 AMAQI
10th Jul 2025164 AMAQI
19°C14/26°C
10th Jul 2025145 AMAQI
10th Jul 2025136 AMAQI
10th Jul 2025157 AMAQI
10th Jul 2025148 AMAQI
10th Jul 2025159 AMAQI
10th Jul 20251510 AMAQI
10th Jul 20251511 AMAQI
10th Jul 20251512 PMAQI
10th Jul 2025171 PMAQI
10th Jul 2025172 PMAQI
10th Jul 2025163 PMAQI
10th Jul 2025184 PMAQI
10th Jul 2025175 PMAQI
10th Jul 2025166 PMAQI
10th Jul 2025177 PMAQI
10th Jul 2025188 PMAQI
10th Jul 2025199 PMAQI
10th Jul 20251810 PMAQI
10th Jul 20251811 PMAQI
11th Jul 20251912 AMAQI
11th Jul 2025191 AMAQI
11th Jul 2025182 AMAQI
11th Jul 2025183 AMAQI
11th Jul 2025194 AMAQI
21°C16/29°C
11th Jul 2025195 AMAQI
11th Jul 2025216 AMAQI
11th Jul 2025187 AMAQI
11th Jul 2025188 AMAQI
11th Jul 2025209 AMAQI
11th Jul 20252110 AMAQI
11th Jul 20252111 AMAQI
11th Jul 20252112 PMAQI
11th Jul 2025231 PMAQI
11th Jul 2025222 PMAQI
11th Jul 2025223 PMAQI
11th Jul 2025234 PMAQI
11th Jul 2025235 PMAQI
11th Jul 2025246 PMAQI
11th Jul 2025217 PMAQI
11th Jul 2025228 PMAQI
11th Jul 2025249 PMAQI
11th Jul 20252410 PMAQI
11th Jul 20252611 PMAQI
12th Jul 20252512 AMAQI
12th Jul 2025241 AMAQI
12th Jul 2025222 AMAQI
12th Jul 2025233 AMAQI
12th Jul 2025234 AMAQI
22°C14/31°C
12th Jul 2025215 AMAQI
12th Jul 2025236 AMAQI
12th Jul 2025227 AMAQI
12th Jul 2025228 AMAQI
12th Jul 2025249 AMAQI
12th Jul 20252410 AMAQI
12th Jul 20252611 AMAQI
12th Jul 20252612 PMAQI
12th Jul 2025241 PMAQI
12th Jul 2025242 PMAQI
12th Jul 2025233 PMAQI
12th Jul 2025234 PMAQI
12th Jul 2025235 PMAQI
12th Jul 2025226 PMAQI
12th Jul 2025227 PMAQI
12th Jul 2025248 PMAQI
12th Jul 2025229 PMAQI
12th Jul 20252210 PMAQI
12th Jul 20252211 PMAQI
13th Jul 20252212 AMAQI
13th Jul 2025221 AMAQI
13th Jul 2025232 AMAQI
13th Jul 2025223 AMAQI
13th Jul 2025224 AMAQI
24°C14/34°C
13th Jul 2025235 AMAQI
13th Jul 2025236 AMAQI
13th Jul 2025227 AMAQI
13th Jul 2025238 AMAQI
13th Jul 2025239 AMAQI
13th Jul 20252510 AMAQI
13th Jul 20252711 AMAQI
13th Jul 20252612 PMAQI
13th Jul 2025251 PMAQI
13th Jul 2025242 PMAQI
13th Jul 2025243 PMAQI
13th Jul 2025244 PMAQI
13th Jul 2025245 PMAQI
13th Jul 2025246 PMAQI
13th Jul 2025247 PMAQI
13th Jul 2025228 PMAQI
13th Jul 2025259 PMAQI
13th Jul 20252310 PMAQI
13th Jul 20252211 PMAQI
14th Jul 20252212 AMAQI
14th Jul 2025231 AMAQI
14th Jul 2025222 AMAQI
14th Jul 2025233 AMAQI
14th Jul 2025214 AMAQI
26°C17/36°C
14th Jul 2025195 AMAQI
14th Jul 2025206 AMAQI
14th Jul 2025197 AMAQI
14th Jul 2025198 AMAQI
14th Jul 2025189 AMAQI
14th Jul 20251910 AMAQI
14th Jul 20252111 AMAQI
14th Jul 20252012 PMAQI
14th Jul 2025211 PMAQI
14th Jul 2025202 PMAQI
14th Jul 2025203 PMAQI
14th Jul 2025194 PMAQI
14th Jul 2025215 PMAQI
14th Jul 2025206 PMAQI
14th Jul 2025217 PMAQI
14th Jul 2025228 PMAQI
14th Jul 2025209 PMAQI
14th Jul 20252110 PMAQI
14th Jul 20252111 PMAQI
15th Jul 20252212 AMAQI
15th Jul 2025221 AMAQI
15th Jul 2025232 AMAQI
15th Jul 2025233 AMAQI
15th Jul 2025194 AMAQI
24°C16/33°C
15th Jul 2025205 AMAQI
15th Jul 2025236 AMAQI
15th Jul 2025217 AMAQI
15th Jul 2025228 AMAQI
15th Jul 2025229 AMAQI
15th Jul 20252210 AMAQI
15th Jul 20252211 AMAQI
15th Jul 20252312 PMAQI
15th Jul 2025271 PMAQI
15th Jul 2025272 PMAQI
15th Jul 2025243 PMAQI
15th Jul 2025264 PMAQI
15th Jul 2025265 PMAQI
15th Jul 2025266 PMAQI
15th Jul 2025247 PMAQI
15th Jul 2025268 PMAQI
15th Jul 2025299 PMAQI
15th Jul 20253010 PMAQI
15th Jul 20252911 PMAQI
16th Jul 20252912 AMAQI
16th Jul 2025291 AMAQI
16th Jul 2025302 AMAQI
16th Jul 2025303 AMAQI
16th Jul 2025364 AMAQI
21°C11/34°C
16th Jul 2025405 AMAQI
16th Jul 2025416 AMAQI
16th Jul 2025387 AMAQI
16th Jul 2025378 AMAQI
16th Jul 2025379 AMAQI
16th Jul 20253710 AMAQI
16th Jul 20254211 AMAQI
16th Jul 20254012 PMAQI
16th Jul 2025371 PMAQI
16th Jul 2025402 PMAQI
16th Jul 2025403 PMAQI
16th Jul 2025394 PMAQI
16th Jul 2025385 PMAQI
16th Jul 2025366 PMAQI
16th Jul 2025397 PMAQI
16th Jul 2025408 PMAQI
16th Jul 2025379 PMAQI
16th Jul 20253610 PMAQI
16th Jul 20253511 PMAQI
17th Jul 20253212 AMAQI
17th Jul 2025331 AMAQI
17th Jul 2025332 AMAQI
17th Jul 2025333 AMAQI
17th Jul 2025324 AMAQI
26°C17/37°C
17th Jul 2025305 AMAQI
17th Jul 2025326 AMAQI
17th Jul 2025337 AMAQI
17th Jul 2025308 AMAQI
17th Jul 2025299 AMAQI
17th Jul 20253010 AMAQI
17th Jul 20253111 AMAQI
17th Jul 20253012 PMAQI
17th Jul 2025301 PMAQI
17th Jul 2025322 PMAQI
17th Jul 2025323 PMAQI
17th Jul 2025324 PMAQI
17th Jul 2025325 PMAQI
17th Jul 2025306 PMAQI
17th Jul 2025327 PMAQI
17th Jul 2025328 PMAQI
17th Jul 2025289 PMAQI
17th Jul 20252810 PMAQI
17th Jul 20252811 PMAQI
18th Jul 20252812 AMAQI
18th Jul 2025291 AMAQI
18th Jul 2025292 AMAQI
18th Jul 2025283 AMAQI
18th Jul 2025254 AMAQI
20°C13/31°C
18th Jul 2025265 AMAQI
18th Jul 2025256 AMAQI
18th Jul 2025247 AMAQI
18th Jul 2025258 AMAQI
18th Jul 2025259 AMAQI
18th Jul 20252610 AMAQI
18th Jul 20252811 AMAQI
18th Jul 20253212 PMAQI
18th Jul 2025331 PMAQI
18th Jul 2025322 PMAQI
18th Jul 2025303 PMAQI
18th Jul 2025294 PMAQI
18th Jul 2025285 PMAQI
18th Jul 2025286 PMAQI
18th Jul 2025277 PMAQI
18th Jul 2025258 PMAQI
18th Jul 2025239 PMAQI
18th Jul 20252410 PMAQI
18th Jul 20252511 PMAQI
19th Jul 20252412 AMAQI
19th Jul 2025251 AMAQI
19th Jul 2025252 AMAQI
19th Jul 2025253 AMAQI
19th Jul 2025194 AMAQI
20°C13/32°C
19th Jul 2025195 AMAQI
19th Jul 2025186 AMAQI
19th Jul 2025197 AMAQI
19th Jul 2025198 AMAQI
19th Jul 2025199 AMAQI
19th Jul 20252010 AMAQI
19th Jul 20251911 AMAQI
19th Jul 20252012 PMAQI
19th Jul 2025201 PMAQI
19th Jul 2025222 PMAQI
19th Jul 2025223 PMAQI
19th Jul 2025224 PMAQI
19th Jul 2025215 PMAQI
19th Jul 2025216 PMAQI
19th Jul 2025207 PMAQI
19th Jul 2025218 PMAQI
19th Jul 2025229 PMAQI
19th Jul 20252210 PMAQI
19th Jul 20252211 PMAQI
20th Jul 20252112 AMAQI
20th Jul 2025211 AMAQI
20th Jul 2025202 AMAQI
20th Jul 2025203 AMAQI
20th Jul 2025174 AMAQI
21°C14/30°C
20th Jul 2025165 AMAQI
20th Jul 2025166 AMAQI
20th Jul 2025187 AMAQI
20th Jul 2025188 AMAQI
20th Jul 2025189 AMAQI
20th Jul 20252010 AMAQI
20th Jul 20252111 AMAQI
20th Jul 20252012 PMAQI
20th Jul 2025211 PMAQI
20th Jul 2025222 PMAQI
20th Jul 2025213 PMAQI
20th Jul 2025224 PMAQI
20th Jul 2025215 PMAQI
20th Jul 2025206 PMAQI
20th Jul 2025207 PMAQI
20th Jul 2025208 PMAQI
20th Jul 2025219 PMAQI
20th Jul 20252010 PMAQI
20th Jul 20252111 PMAQI
21st Jul 20252112 AMAQI
21st Jul 2025211 AMAQI
21st Jul 2025212 AMAQI
21st Jul 2025183 AMAQI
21st Jul 2025164 AMAQI
19°C13/26°C
21st Jul 2025165 AMAQI
21st Jul 2025176 AMAQI
21st Jul 2025187 AMAQI
21st Jul 2025188 AMAQI
21st Jul 2025189 AMAQI
21st Jul 20251710 AMAQI
21st Jul 20252011 AMAQI
21st Jul 20252012 PMAQI
21st Jul 2025211 PMAQI
21st Jul 2025202 PMAQI
21st Jul 2025203 PMAQI
21st Jul 2025214 PMAQI
21st Jul 2025205 PMAQI
21st Jul 2025206 PMAQI
21st Jul 2025207 PMAQI
21st Jul 2025208 PMAQI
21st Jul 2025209 PMAQI
21st Jul 20252010 PMAQI
21st Jul 20252011 PMAQI
22nd Jul 20251912 AMAQI
22nd Jul 2025181 AMAQI
22nd Jul 2025192 AMAQI
22nd Jul 2025183 AMAQI
22nd Jul 2025174 AMAQI
19°C15/24°C
22nd Jul 2025195 AMAQI
22nd Jul 2025176 AMAQI
22nd Jul 2025187 AMAQI
22nd Jul 2025188 AMAQI
22nd Jul 2025189 AMAQI
22nd Jul 20252010 AMAQI
22nd Jul 20252211 AMAQI
22nd Jul 20252312 PMAQI
22nd Jul 2025231 PMAQI
22nd Jul 2025232 PMAQI
22nd Jul 2025223 PMAQI
22nd Jul 2025224 PMAQI
22nd Jul 2025225 PMAQI
22nd Jul 2025226 PMAQI
22nd Jul 2025207 PMAQI
22nd Jul 2025208 PMAQI
22nd Jul 2025239 PMAQI
22nd Jul 20252210 PMAQI
22nd Jul 20252311 PMAQI
23rd Jul 20252212 AMAQI
23rd Jul 2025221 AMAQI
23rd Jul 2025222 AMAQI
23rd Jul 2025203 AMAQI
23rd Jul 2025184 AMAQI
20°C12/31°C
23rd Jul 2025205 AMAQI
23rd Jul 2025236 AMAQI
23rd Jul 2025247 AMAQI
23rd Jul 2025238 AMAQI
23rd Jul 2025279 AMAQI
23rd Jul 20252410 AMAQI
23rd Jul 20252911 AMAQI
23rd Jul 20253212 PMAQI
23rd Jul 2025271 PMAQI
23rd Jul 2025302 PMAQI
23rd Jul 2025283 PMAQI
23rd Jul 2025284 PMAQI
23rd Jul 2025265 PMAQI
23rd Jul 2025256 PMAQI
23rd Jul 2025247 PMAQI
23rd Jul 2025248 PMAQI
23rd Jul 2025249 PMAQI
23rd Jul 20252510 PMAQI
23rd Jul 20252511 PMAQI
24th Jul 20252312 AMAQI
24th Jul 2025221 AMAQI
24th Jul 2025222 AMAQI
24th Jul 2025223 AMAQI
24th Jul 2025164 AMAQI
23°C14/34°C
24th Jul 2025165 AMAQI
24th Jul 2025186 AMAQI
24th Jul 2025187 AMAQI
24th Jul 2025188 AMAQI
24th Jul 2025189 AMAQI
24th Jul 20251610 AMAQI
24th Jul 20251611 AMAQI
24th Jul 20251612 PMAQI
24th Jul 2025151 PMAQI
24th Jul 2025162 PMAQI
24th Jul 2025183 PMAQI
24th Jul 2025184 PMAQI
24th Jul 2025195 PMAQI
24th Jul 2025186 PMAQI
24th Jul 2025207 PMAQI
24th Jul 2025208 PMAQI
24th Jul 2025219 PMAQI
24th Jul 20252110 PMAQI
24th Jul 20251911 PMAQI
25th Jul 20251812 AMAQI
25th Jul 2025181 AMAQI
25th Jul 2025172 AMAQI
25th Jul 2025163 AMAQI
25th Jul 2025144 AMAQI
20°C14/31°C
25th Jul 2025145 AMAQI
25th Jul 2025136 AMAQI
25th Jul 2025147 AMAQI
25th Jul 2025158 AMAQI
25th Jul 2025159 AMAQI
25th Jul 20251610 AMAQI
25th Jul 20251711 AMAQI
25th Jul 20251612 PMAQI
25th Jul 2025171 PMAQI
25th Jul 2025162 PMAQI
25th Jul 2025173 PMAQI
25th Jul 2025174 PMAQI
25th Jul 2025175 PMAQI
25th Jul 2025166 PMAQI
25th Jul 2025177 PMAQI
25th Jul 2025168 PMAQI
25th Jul 2025179 PMAQI
25th Jul 20251710 PMAQI
25th Jul 20251611 PMAQI
26th Jul 20251712 AMAQI
26th Jul 2025161 AMAQI
26th Jul 2025162 AMAQI
26th Jul 2025163 AMAQI
26th Jul 2025124 AMAQI
20°C14/30°C
26th Jul 2025135 AMAQI
26th Jul 2025136 AMAQI
26th Jul 2025137 AMAQI
26th Jul 2025158 AMAQI
26th Jul 2025179 AMAQI
26th Jul 20251810 AMAQI
26th Jul 20251711 AMAQI
26th Jul 20251512 PMAQI
26th Jul 2025141 PMAQI
26th Jul 2025162 PMAQI
26th Jul 2025163 PMAQI
26th Jul 2025174 PMAQI
26th Jul 2025185 PMAQI
26th Jul 2025176 PMAQI
26th Jul 2025177 PMAQI
26th Jul 2025178 PMAQI
26th Jul 2025189 PMAQI
26th Jul 20251710 PMAQI
26th Jul 20251811 PMAQI
27th Jul 20251812 AMAQI
27th Jul 2025181 AMAQI
27th Jul 2025172 AMAQI
27th Jul 2025163 AMAQI
27th Jul 2025164 AMAQI
17°C12/22°C
27th Jul 2025145 AMAQI
27th Jul 2025146 AMAQI
27th Jul 2025167 AMAQI
27th Jul 2025208 AMAQI
27th Jul 2025199 AMAQI
27th Jul 20251710 AMAQI
27th Jul 20251711 AMAQI
27th Jul 20251812 PMAQI
27th Jul 2025201 PMAQI
27th Jul 2025172 PMAQI
27th Jul 2025173 PMAQI
27th Jul 2025174 PMAQI
27th Jul 2025165 PMAQI
27th Jul 2025166 PMAQI
27th Jul 2025177 PMAQI
27th Jul 2025178 PMAQI
27th Jul 2025179 PMAQI
27th Jul 20251810 PMAQI
27th Jul 20251811 PMAQI
28th Jul 20251812 AMAQI
28th Jul 2025181 AMAQI
28th Jul 2025172 AMAQI
28th Jul 2025163 AMAQI
28th Jul 2025154 AMAQI
20°C12/29°C
28th Jul 2025155 AMAQI
28th Jul 2025166 AMAQI
28th Jul 2025177 AMAQI
28th Jul 2025178 AMAQI
28th Jul 2025189 AMAQI
28th Jul 20251810 AMAQI
28th Jul 20251811 AMAQI
28th Jul 20252012 PMAQI
28th Jul 2025221 PMAQI
28th Jul 2025202 PMAQI
28th Jul 2025203 PMAQI
28th Jul 2025194 PMAQI
28th Jul 2025185 PMAQI
28th Jul 2025186 PMAQI
28th Jul 2025197 PMAQI
28th Jul 2025198 PMAQI
28th Jul 2025199 PMAQI
28th Jul 20251910 PMAQI
28th Jul 20251911 PMAQI
29th Jul 20251912 AMAQI
29th Jul 2025191 AMAQI
29th Jul 2025182 AMAQI
29th Jul 2025173 AMAQI
29th Jul 2025154 AMAQI
21°C13/32°C
29th Jul 2025165 AMAQI
29th Jul 2025156 AMAQI
29th Jul 2025167 AMAQI
29th Jul 2025178 AMAQI
29th Jul 2025179 AMAQI
29th Jul 20251710 AMAQI
29th Jul 20252211 AMAQI
29th Jul 20252212 PMAQI
29th Jul 2025201 PMAQI
29th Jul 2025202 PMAQI
29th Jul 2025203 PMAQI
29th Jul 2025194 PMAQI
29th Jul 2025205 PMAQI
29th Jul 2025206 PMAQI
29th Jul 2025197 PMAQI
29th Jul 2025208 PMAQI
29th Jul 2025199 PMAQI
29th Jul 20252010 PMAQI
29th Jul 20251911 PMAQI
30th Jul 20251912 AMAQI
30th Jul 2025181 AMAQI
30th Jul 2025182 AMAQI
30th Jul 2025163 AMAQI
30th Jul 2025144 AMAQI
22°C13/35°C
30th Jul 2025155 AMAQI
30th Jul 2025186 AMAQI
30th Jul 2025177 AMAQI
30th Jul 2025168 AMAQI
30th Jul 2025169 AMAQI
30th Jul 20251610 AMAQI
30th Jul 20251711 AMAQI
30th Jul 20251812 PMAQI
30th Jul 2025171 PMAQI
30th Jul 2025182 PMAQI
30th Jul 2025183 PMAQI
30th Jul 2025184 PMAQI
30th Jul 2025185 PMAQI
30th Jul 2025186 PMAQI
30th Jul 2025187 PMAQI
30th Jul 2025188 PMAQI
30th Jul 2025229 PMAQI
30th Jul 20252210 PMAQI
30th Jul 20252211 PMAQI
31st Jul 20252112 AMAQI
31st Jul 2025201 AMAQI
31st Jul 2025192 AMAQI
31st Jul 2025153 AMAQI
31st Jul 2025154 AMAQI
22°C13/34°C
31st Jul 2025135 AMAQI
31st Jul 2025196 AMAQI
31st Jul 2025277 AMAQI
31st Jul 2025248 AMAQI
31st Jul 2025229 AMAQI
31st Jul 20252610 AMAQI
31st Jul 20252911 AMAQI
31st Jul 20253012 PMAQI
31st Jul 2025301 PMAQI
31st Jul 2025252 PMAQI
31st Jul 2025233 PMAQI
31st Jul 2025254 PMAQI
31st Jul 2025265 PMAQI
31st Jul 2025276 PMAQI
31st Jul 2025267 PMAQI
31st Jul 2025278 PMAQI
31st Jul 2025269 PMAQI
31st Jul 20252910 PMAQI
31st Jul 20252811 PMAQI
1st Aug 20252612 AMAQI
1st Aug 2025231 AMAQI
1st Aug 2025202 AMAQI
1st Aug 2025203 AMAQI
1st Aug 2025204 AMAQI
22°C15/31°C
1st Aug 2025195 AMAQI
1st Aug 2025186 AMAQI
1st Aug 2025167 AMAQI
1st Aug 2025148 AMAQI
1st Aug 2025149 AMAQI
1st Aug 20251410 AMAQI
1st Aug 20251711 AMAQI
1st Aug 20251712 PMAQI
1st Aug 2025161 PMAQI
1st Aug 2025172 PMAQI
1st Aug 2025193 PMAQI
1st Aug 2025204 PMAQI
1st Aug 2025205 PMAQI
1st Aug 2025196 PMAQI
1st Aug 2025187 PMAQI
1st Aug 2025188 PMAQI
1st Aug 2025199 PMAQI
1st Aug 20251810 PMAQI
1st Aug 20252011 PMAQI
2nd Aug 20251912 AMAQI
2nd Aug 2025181 AMAQI
2nd Aug 2025192 AMAQI
2nd Aug 2025193 AMAQI
2nd Aug 2025184 AMAQI
23°C16/32°C
2nd Aug 2025165 AMAQI
5 AM2nd Aug 2025166 AMAQI
2nd Aug 2025157 AMAQI
2nd Aug 2025158 AMAQI
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
11 AM - 8 PM
23AQI
10 hours / Day
300 hours / Month
Avg. Lowest Time
5 AM - 10 AM
20AQI
6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 AM to 8 PM (Avg. 23), while the lowest AQI was between 5 AM to 10 AM (Avg. 20).
Night time
Avg. Highest Time
12 AM - 11 PM
22AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 4 AM
21AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 22), while the lowest AQI was between 12 AM to 4 AM (Avg. 21).
2025 Days Vs Air Quality
Highway 99, Eugene, Oregon, United States
2025
95%
202
5%
11
Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)
Good
202 DaysModerate
11 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 214 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
Highway 99, Eugene, Oregon, 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
30AQI
30AQI
2nd January 2025
38AQI
38AQI
3rd January 2025
24AQI
24AQI
4th January 2025
21AQI
21AQI
5th January 2025
20AQI
20AQI
6th January 2025
30AQI
30AQI
7th January 2025
45AQI
45AQI
8th January 2025
60AQI
60AQI
9th January 2025
59AQI
59AQI
10th January 2025
34AQI
34AQI
11th January 2025
37AQI
37AQI
12th January 2025
41AQI
41AQI
13th January 2025
36AQI
36AQI
14th January 2025
38AQI
38AQI
15th January 2025
40AQI
40AQI
16th January 2025
40AQI
40AQI
17th January 2025
42AQI
42AQI
18th January 2025
36AQI
36AQI
19th January 2025
57AQI
57AQI
20th January 2025
71AQI
71AQI
21st January 2025
63AQI
63AQI
22nd January 2025
82AQI
82AQI
23rd January 2025
91AQI
91AQI
24th January 2025
74AQI
74AQI
25th January 2025
47AQI
47AQI
26th January 2025
49AQI
49AQI
27th January 2025
76AQI
76AQI
28th January 2025
80AQI
80AQI
29th January 2025
59AQI
59AQI
30th January 2025
45AQI
45AQI
31st January 2025
29AQI
29AQI
1st February 2025
21AQI
21AQI
2nd February 2025
26AQI
26AQI
3rd February 2025
26AQI
26AQI
4th February 2025
32AQI
32AQI
5th February 2025
22AQI
22AQI
6th February 2025
25AQI
25AQI
7th February 2025
23AQI
23AQI
8th February 2025
22AQI
22AQI
9th February 2025
28AQI
28AQI
10th February 2025
32AQI
32AQI
11th February 2025
28AQI
28AQI
12th February 2025
33AQI
33AQI
13th February 2025
27AQI
27AQI
14th February 2025
25AQI
25AQI
15th February 2025
23AQI
23AQI
16th February 2025
19AQI
19AQI
17th February 2025
19AQI
19AQI
18th February 2025
19AQI
19AQI
19th February 2025
19AQI
19AQI
20th February 2025
19AQI
19AQI
21st February 2025
23AQI
23AQI
22nd February 2025
20AQI
20AQI
23rd February 2025
17AQI
17AQI
24th February 2025
20AQI
20AQI
25th February 2025
19AQI
19AQI
26th February 2025
27AQI
27AQI
27th February 2025
29AQI
29AQI
28th February 2025
34AQI
34AQI
1st March 2025
34AQI
34AQI
2nd March 2025
20AQI
20AQI
3rd March 2025
17AQI
17AQI
4th March 2025
21AQI
21AQI
5th March 2025
22AQI
22AQI
6th March 2025
22AQI
22AQI
7th March 2025
23AQI
23AQI
8th March 2025
22AQI
22AQI
9th March 2025
23AQI
23AQI
10th March 2025
19AQI
19AQI
11th March 2025
26AQI
26AQI
12th March 2025
18AQI
18AQI
13th March 2025
16AQI
16AQI
14th March 2025
16AQI
16AQI
15th March 2025
16AQI
16AQI
16th March 2025
15AQI
15AQI
17th March 2025
16AQI
16AQI
18th March 2025
15AQI
15AQI
19th March 2025
16AQI
16AQI
20th March 2025
14AQI
14AQI
21st March 2025
14AQI
14AQI
22nd March 2025
15AQI
15AQI
23rd March 2025
15AQI
15AQI
24th March 2025
18AQI
18AQI
25th March 2025
31AQI
31AQI
26th March 2025
36AQI
36AQI
27th March 2025
17AQI
17AQI
28th March 2025
17AQI
17AQI
29th March 2025
16AQI
16AQI
30th March 2025
27AQI
27AQI
31st March 2025
16AQI
16AQI
1st April 2025
18AQI
18AQI
2nd April 2025
21AQI
21AQI
3rd April 2025
24AQI
24AQI
4th April 2025
32AQI
32AQI
5th April 2025
28AQI
28AQI
6th April 2025
21AQI
21AQI
7th April 2025
16AQI
16AQI
8th April 2025
15AQI
15AQI
9th April 2025
15AQI
15AQI
10th April 2025
18AQI
18AQI
11th April 2025
17AQI
17AQI
12th April 2025
18AQI
18AQI
13th April 2025
20AQI
20AQI
14th April 2025
25AQI
25AQI
15th April 2025
24AQI
24AQI
16th April 2025
24AQI
24AQI
17th April 2025
25AQI
25AQI
18th April 2025
26AQI
26AQI
19th April 2025
19AQI
19AQI
20th April 2025
19AQI
19AQI
21st April 2025
16AQI
16AQI
22nd April 2025
16AQI
16AQI
23rd April 2025
24AQI
24AQI
24th April 2025
32AQI
32AQI
25th April 2025
21AQI
21AQI
26th April 2025
21AQI
21AQI
27th April 2025
20AQI
20AQI
28th April 2025
15AQI
15AQI
29th April 2025
17AQI
17AQI
30th April 2025
20AQI
20AQI
1st May 2025
31AQI
31AQI
2nd May 2025
19AQI
19AQI
3rd May 2025
14AQI
14AQI
4th May 2025
15AQI
15AQI
5th May 2025
18AQI
18AQI
6th May 2025
23AQI
23AQI
7th May 2025
17AQI
17AQI
8th May 2025
18AQI
18AQI
9th May 2025
27AQI
27AQI
10th May 2025
19AQI
19AQI
11th May 2025
16AQI
16AQI
12th May 2025
15AQI
15AQI
13th May 2025
14AQI
14AQI
14th May 2025
18AQI
18AQI
15th May 2025
19AQI
19AQI
16th May 2025
20AQI
20AQI
17th May 2025
15AQI
15AQI
18th May 2025
18AQI
18AQI
19th May 2025
21AQI
21AQI
20th May 2025
15AQI
15AQI
21st May 2025
18AQI
18AQI
22nd May 2025
19AQI
19AQI
23rd May 2025
21AQI
21AQI
24th May 2025
27AQI
27AQI
25th May 2025
17AQI
17AQI
26th May 2025
15AQI
15AQI
27th May 2025
24AQI
24AQI
28th May 2025
26AQI
26AQI
29th May 2025
19AQI
19AQI
30th May 2025
24AQI
24AQI
31st May 2025
27AQI
27AQI
1st June 2025
19AQI
19AQI
2nd June 2025
25AQI
25AQI
3rd June 2025
26AQI
26AQI
4th June 2025
20AQI
20AQI
5th June 2025
23AQI
23AQI
6th June 2025
28AQI
28AQI
7th June 2025
20AQI
20AQI
8th June 2025
30AQI
30AQI
9th June 2025
31AQI
31AQI
10th June 2025
37AQI
37AQI
11th June 2025
36AQI
36AQI
12th June 2025
35AQI
35AQI
13th June 2025
27AQI
27AQI
14th June 2025
23AQI
23AQI
15th June 2025
26AQI
26AQI
16th June 2025
24AQI
24AQI
17th June 2025
21AQI
21AQI
18th June 2025
17AQI
17AQI
19th June 2025
20AQI
20AQI
20th June 2025
20AQI
20AQI
21st June 2025
19AQI
19AQI
22nd June 2025
18AQI
18AQI
23rd June 2025
26AQI
26AQI
24th June 2025
37AQI
37AQI
25th June 2025
33AQI
33AQI
26th June 2025
20AQI
20AQI
27th June 2025
17AQI
17AQI
28th June 2025
17AQI
17AQI
29th June 2025
21AQI
21AQI
30th June 2025
29AQI
29AQI
1st July 2025
27AQI
27AQI
2nd July 2025
19AQI
19AQI
3rd July 2025
18AQI
18AQI
4th July 2025
18AQI
18AQI
5th July 2025
24AQI
24AQI
6th July 2025
25AQI
25AQI
7th July 2025
25AQI
25AQI
8th July 2025
29AQI
29AQI
9th July 2025
19AQI
19AQI
10th July 2025
17AQI
17AQI
11th July 2025
21AQI
21AQI
12th July 2025
23AQI
23AQI
13th July 2025
23AQI
23AQI
14th July 2025
21AQI
21AQI
15th July 2025
24AQI
24AQI
16th July 2025
36AQI
36AQI
17th July 2025
31AQI
31AQI
18th July 2025
27AQI
27AQI
19th July 2025
21AQI
21AQI
20th July 2025
20AQI
20AQI
21st July 2025
19AQI
19AQI
22nd July 2025
20AQI
20AQI
23rd July 2025
24AQI
24AQI
24th July 2025
19AQI
19AQI
25th July 2025
16AQI
16AQI
26th July 2025
16AQI
16AQI
27th July 2025
17AQI
17AQI
28th July 2025
18AQI
18AQI
29th July 2025
18AQI
18AQI
30th July 2025
18AQI
18AQI
31st July 2025
23AQI
23AQI
1st August 2025
19AQI
19AQI
48AQI
24AQI
20AQI
21AQI
20AQI
25AQI
22AQI
19AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202526AQI
20
11
28
31
30
31
30
31
1
202
11
Highest AQI recorded in
January48AQI
Lowest AQI recorded in
August19AQI
202426AQI
17
2
4
1
3
12
29
31
30
1
25
3
28
3
28
2
24
7
233
17
Highest AQI recorded in
December36AQI
Lowest AQI recorded in
April14AQI
202339AQI
1
2
27
4
27
5
2
Highest AQI recorded in
November100AQI
Lowest AQI recorded in
December33AQI
202128AQI
26
4
27
1
28
3
29
1
31
28
2
30
1
27
4
18
6
244
22
Highest AQI recorded in
September40AQI
Lowest AQI recorded in
May21AQI
202044AQI
12
1
19
1
13
26
29
30
1
15
5
3
7
19
11
23
5
25
6
211
30
3
7
Highest AQI recorded in
September153AQI
Lowest AQI recorded in
June16AQI
Most & Least Polluted Years Over the Last 5 Years
Most Polluted Year Recorded
2020(Avg.)
44AQILeast Polluted Year Recorded
2025(Avg.)
26AQIHighway 99's annual 2025 AQI (26) shows an average percentage change of -22.3% (improved AQI) compared to previous years: 2020 (44), 2021 (28), 2023 (39), 2024 (26).
