What is the sulfur dioxide (SO2) level in Walla Walla, Washington at the moment?

Currently, Walla Walla, Washington has a sulfur dioxide (SO2) concentration of 0.934 ppb.

What is the ozone (O3) level in Walla Walla, Washington at the moment?

The current ozone (O3) level in Walla Walla, Washington at the moment is 18.486 ppm.

What is the nitrogen dioxide (NO2) level in Walla Walla, Washington at the moment?

Nitrogen dioxide (NO2) level in Walla Walla, Washington at the moment is 13.434 ppb.

Live air quality index in Walla Walla, Washington today

Q: What is the PM2.5 level in Walla Walla, Washington at the moment?

PM2.5 levels in Walla Walla, Washington are currently 11.987 μg/m3.

Q: What is the PM10 level in Walla Walla, Washington at the moment?

The PM10 concentration in Walla Walla, Washington is 53.951 μg/m3 at the moment.

Stay updated with real-time air quality in Walla Walla, Washington featuring accurate data on AQI, PM_2.5, PM₁₀, O₃, NO₂, SO₂, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.

Live AQI (Air Quality Index)

Moderate

Walla Walla, Washington

Last updated: ... (Local time)

Major air pollutants in Walla Walla, Washington

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

11.99 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

53.95 μg/m³

155

255

425

605+

Ozone (O₃)

18.49 ppb

201

201+

Sulfur Dioxide (SO₂)

0.93 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

13.43 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.33 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Walla Walla, Washington

Get Live Pollen Counts

Walla Walla, Washington

Scroll To Air Quality Map

Track live Walla Walla, Washington air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T20:00:00.000Z	38 \| good	7.3 \| good	32 \| good	20.796 \| good	0.94 \| good	6.926 \| good	0.163 \| good
2026-10-20T21:00:00.000Z	38 \| good	7 \| good	31 \| good	23.984 \| good	0.941 \| good	4.167 \| good	0.156 \| good
2026-10-20T22:00:00.000Z	38 \| good	7 \| good	31 \| good	29.642 \| good	0.941 \| good	3.168 \| good	0.175 \| good
2026-10-20T23:00:00.000Z	38 \| good	7.2 \| good	32 \| good	33.307 \| good	0.86 \| good	3.953 \| good	0.175 \| good
2026-10-21T00:00:00.000Z	38 \| good	7.1 \| good	32 \| good	24.504 \| good	0.875 \| good	3.794 \| good	0.2 \| good
2026-10-21T01:00:00.000Z	38 \| good	6.9 \| good	31 \| good	28.532 \| good	0.897 \| good	6.904 \| good	0.219 \| good
2026-10-21T02:00:00.000Z	38 \| good	7.1 \| good	32 \| good	29.419 \| good	0.881 \| good	12.157 \| good	0.2 \| good
2026-10-21T03:00:00.000Z	66 \| moderate	17.404 \| fine	76.982 \| fine	19.899 \| good	0.275 \| good	7.398 \| good	0.23 \| good
2026-10-21T04:00:00.000Z	49 \| good	8.7 \| good	38 \| good	23.239 \| good	0.622 \| good	11.741 \| good	0.219 \| good
2026-10-21T05:00:00.000Z	49 \| good	8.5 \| good	37 \| good	19.574 \| good	0.622 \| good	10.061 \| good	0.225 \| good
2026-10-21T06:00:00.000Z	44 \| good	8.4 \| good	37 \| good	18.259 \| good	0.57 \| good	9.361 \| good	0.207 \| good
2026-10-21T07:00:00.000Z	44 \| good	8.3 \| good	37 \| good	15.847 \| good	0.57 \| good	9.352 \| good	0.232 \| good
2026-10-21T08:00:00.000Z	44 \| good	7.8 \| good	34 \| good	13.676 \| good	0.427 \| good	8.203 \| good	0.27 \| good
2026-10-21T09:00:00.000Z	44 \| good	7.6 \| good	34 \| good	12.976 \| good	0.833 \| good	8.53 \| good	0.306 \| good
2026-10-21T10:00:00.000Z	38 \| good	7.4 \| good	33 \| good	10.716 \| good	0.458 \| good	8.313 \| good	0.262 \| good
2026-10-21T11:00:00.000Z	38 \| good	6.9 \| good	31 \| good	11.079 \| good	0.549 \| good	7.17 \| good	0.319 \| good
2026-10-21T12:00:00.000Z	38 \| good	6.5 \| good	29 \| good	9.366 \| good	0.427 \| good	7.826 \| good	0.3 \| good
2026-10-21T13:00:00.000Z	33 \| good	6.4 \| good	29 \| good	7.13 \| good	0.427 \| good	7.821 \| good	0.292 \| good
2026-10-21T14:00:00.000Z	38 \| good	6.7 \| good	30 \| good	8.262 \| good	0.454 \| good	10.275 \| good	0.391 \| good
2026-10-21T15:00:00.000Z	38 \| good	6.9 \| good	31 \| good	4.759 \| good	0.528 \| good	12.018 \| good	0.43 \| good
2026-10-21T16:00:00.000Z	38 \| good	7 \| good	31 \| good	8.255 \| good	0.563 \| good	11.067 \| good	0.384 \| good
2026-10-21T17:00:00.000Z	49 \| good	8.9 \| good	39 \| good	11.369 \| good	0.582 \| good	9.568 \| good	0.513 \| good
2026-10-21T18:00:00.000Z	44 \| good	8.4 \| good	37 \| good	17.25 \| good	0.751 \| good	7.617 \| good	0.404 \| good
2026-10-21T19:00:00.000Z	44 \| good	8 \| good	35 \| good	25.548 \| good	0.731 \| good	3.792 \| good	0.366 \| good
2026-10-21T20:00:00.000Z	49 \| good	8.6 \| good	38 \| good	29.424 \| good	0.94 \| good	4.921 \| good	0.329 \| good
2026-10-21T21:00:00.000Z	52 \| moderate	9.7 \| good	43 \| good	32.323 \| good	1.162 \| good	3.98 \| good	0.33 \| good
2026-10-21T22:00:00.000Z	54 \| moderate	10.5 \| good	47 \| good	34.789 \| good	1.232 \| good	4.173 \| good	0.249 \| good
2026-10-21T23:00:00.000Z	52 \| moderate	10.1 \| good	45 \| good	32.025 \| good	1.774 \| good	8.311 \| good	0.268 \| good
2026-10-22T00:00:00.000Z	52 \| moderate	10.1 \| good	45 \| good	26.043 \| good	0.957 \| good	4.146 \| good	0.293 \| good
2026-10-22T01:00:00.000Z	54 \| moderate	10.9 \| good	48 \| good	31.571 \| good	0.972 \| good	7.757 \| good	0.293 \| good
2026-10-22T02:00:00.000Z	54 \| moderate	11.3 \| good	50 \| good	30.347 \| good	0.762 \| good	16.008 \| good	0.424 \| good
2026-10-22T03:00:00.000Z	56 \| moderate	12.093 \| good	54.905 \| good	23.528 \| good	0.281 \| good	6.939 \| good	0.226 \| good
2026-10-22T04:00:00.000Z	58 \| moderate	13 \| fine	59 \| fine	20.691 \| good	0.727 \| good	14.808 \| good	0.479 \| good
2026-10-22T05:00:00.000Z	58 \| moderate	13.4 \| fine	61 \| fine	17.788 \| good	0.625 \| good	14.482 \| good	0.466 \| good
2026-10-22T06:00:00.000Z	58 \| moderate	12.9 \| fine	59 \| fine	12.501 \| good	0.622 \| good	15.539 \| good	0.448 \| good
2026-10-22T07:00:00.000Z	58 \| moderate	12.5 \| fine	57 \| fine	13.664 \| good	0.622 \| good	15.536 \| good	0.454 \| good
2026-10-22T08:00:00.000Z	56 \| moderate	12.3 \| fine	55 \| fine	12.607 \| good	0.638 \| good	12.415 \| good	0.354 \| good
2026-10-22T09:00:00.000Z	56 \| moderate	12 \| good	54 \| good	10.206 \| good	0.497 \| good	9.329 \| good	0.336 \| good
2026-10-22T10:00:00.000Z	56 \| moderate	11.8 \| good	52 \| good	7.79 \| good	0.62 \| good	8.371 \| good	0.36 \| good
2026-10-22T11:00:00.000Z	56 \| moderate	11.6 \| good	51 \| good	10.657 \| good	0.527 \| good	7.185 \| good	0.36 \| good
2026-10-22T12:00:00.000Z	54 \| moderate	11.3 \| good	50 \| good	5.119 \| good	0.641 \| good	15.25 \| good	0.353 \| good
2026-10-22T13:00:00.000Z	54 \| moderate	11.1 \| good	49 \| good	5.333 \| good	0.51 \| good	14.494 \| good	0.334 \| good
2026-10-22T14:00:00.000Z	54 \| moderate	10.9 \| good	48 \| good	4.477 \| good	0.54 \| good	14.374 \| good	0.352 \| good
2026-10-22T15:00:00.000Z	54 \| moderate	11 \| good	49 \| good	6.521 \| good	0.59 \| good	13.706 \| good	0.416 \| good
2026-10-22T16:00:00.000Z	54 \| moderate	11.3 \| good	50 \| good	8.429 \| good	0.653 \| good	15.018 \| good	0.515 \| good
2026-10-22T17:00:00.000Z	56 \| moderate	11.6 \| good	51 \| good	12.312 \| good	0.703 \| good	12.738 \| good	0.471 \| good
2026-10-22T18:00:00.000Z	56 \| moderate	11.7 \| good	52 \| good	14.379 \| good	0.732 \| good	14.653 \| good	0.352 \| good
2026-10-22T19:00:00.000Z	56 \| moderate	12 \| good	54 \| good	18.464 \| good	0.933 \| good	13.466 \| good	0.327 \| good
2026-10-22T19:00:00.000Z	56 \| moderate	11.987 \| good	53.951 \| good	18.486 \| good	0.934 \| good	13.434 \| good	0.327 \| good
2026-10-22T20:00:00.000Z	33 \| good	5.797 \| good	25.099 \| good	30.456 \| good	0.219 \| good	3.352 \| good	0.2 \| good
2026-10-22T21:00:00.000Z	27 \| good	5.44 \| good	23.067 \| good	28.316 \| good	0.184 \| good	3.207 \| good	0.194 \| good
2026-10-22T22:00:00.000Z	38 \| good	6.86 \| good	30.038 \| good	28.673 \| good	0.165 \| good	3.249 \| good	0.194 \| good
2026-10-22T23:00:00.000Z	27 \| good	4.654 \| good	20.076 \| good	26.71 \| good	0.156 \| good	3.237 \| good	0.192 \| good
2026-10-23T00:00:00.000Z	26 \| good	2.519 \| good	10.09 \| good	28.308 \| good	0.148 \| good	3.483 \| good	0.192 \| good
2026-10-23T01:00:00.000Z	24 \| good	4.322 \| good	19.038 \| good	26.368 \| good	0.141 \| good	3.848 \| good	0.198 \| good
2026-10-23T02:00:00.000Z	38 \| good	6.926 \| good	30.946 \| good	25.108 \| good	0.138 \| good	3.925 \| good	0.205 \| good
2026-10-23T03:00:00.000Z	44 \| good	7.54 \| good	33.104 \| good	25.396 \| good	0.158 \| good	3.456 \| good	0.209 \| good
2026-10-23T04:00:00.000Z	28 \| good	5.276 \| good	23.249 \| good	30.417 \| good	0.195 \| good	2.902 \| good	0.217 \| good
2026-10-23T05:00:00.000Z	44 \| good	7.569 \| good	33.114 \| good	31.08 \| good	0.226 \| good	2.694 \| good	0.223 \| good
2026-10-23T06:00:00.000Z	33 \| good	6.108 \| good	26.962 \| good	31.995 \| good	0.262 \| good	2.623 \| good	0.215 \| good
2026-10-23T07:00:00.000Z	28 \| good	0.303 \| good	1.128 \| good	29.698 \| good	0.297 \| good	2.481 \| good	0.195 \| good
2026-10-23T08:00:00.000Z	23 \| good	0.133 \| good	0.062 \| good	24.815 \| good	0.32 \| good	2.279 \| good	0.176 \| good
2026-10-23T09:00:00.000Z	23 \| good	0.11 \| good	0.047 \| good	24.752 \| good	0.334 \| good	2.098 \| good	0.165 \| good
2026-10-23T10:00:00.000Z	22 \| good	0.102 \| good	0.038 \| good	24.44 \| good	0.345 \| good	1.922 \| good	0.159 \| good
2026-10-23T11:00:00.000Z	23 \| good	0.125 \| good	0.056 \| good	25.085 \| good	0.35 \| good	1.758 \| good	0.154 \| good
2026-10-23T12:00:00.000Z	24 \| good	0.102 \| good	0.041 \| good	26.386 \| good	0.355 \| good	1.588 \| good	0.15 \| good
2026-10-23T13:00:00.000Z	25 \| good	0.093 \| good	0.052 \| good	27.472 \| good	0.359 \| good	1.422 \| good	0.146 \| good
2026-10-23T14:00:00.000Z	22 \| good	0.465 \| good	1.992 \| good	24.249 \| good	0.354 \| good	1.375 \| good	0.144 \| good
2026-10-23T15:00:00.000Z	22 \| good	0.505 \| good	2.005 \| good	24.115 \| good	0.351 \| good	1.444 \| good	0.143 \| good
2026-10-23T16:00:00.000Z	24 \| good	0.585 \| good	2.04 \| good	26.47 \| good	0.354 \| good	1.329 \| good	0.143 \| good
2026-10-23T17:00:00.000Z	27 \| good	0.117 \| good	0.085 \| good	28.588 \| good	0.378 \| good	1.075 \| good	0.142 \| good
2026-10-23T18:00:00.000Z	31 \| good	0.099 \| good	0.086 \| good	33.29 \| good	0.432 \| good	0.889 \| good	0.143 \| good
2026-10-23T19:00:00.000Z	34 \| good	0.103 \| good	0.091 \| good	37.082 \| good	0.471 \| good	0.716 \| good	0.143 \| good
2026-10-23T20:00:00.000Z	36 \| good	0.223 \| good	1.061 \| good	38.894 \| good	0.485 \| good	0.603 \| good	0.143 \| good
2026-10-23T21:00:00.000Z	37 \| good	1.37 \| good	5.075 \| good	39.781 \| good	0.471 \| good	0.54 \| good	0.142 \| good
2026-10-23T22:00:00.000Z	39 \| good	2.798 \| good	11.95 \| good	41.905 \| good	0.448 \| good	0.535 \| good	0.142 \| good
2026-10-23T23:00:00.000Z	35 \| good	2.647 \| good	10.962 \| good	37.634 \| good	0.431 \| good	0.586 \| good	0.142 \| good
2026-10-24T00:00:00.000Z	31 \| good	1.166 \| good	4.998 \| good	34.139 \| good	0.413 \| good	0.916 \| good	0.145 \| good
2026-10-24T01:00:00.000Z	24 \| good	0.923 \| good	4.026 \| good	26.402 \| good	0.383 \| good	1.9 \| good	0.157 \| good
2026-10-24T02:00:00.000Z	19 \| good	3.012 \| good	12.063 \| good	19.633 \| good	0.376 \| good	2.626 \| good	0.168 \| good
2026-10-24T03:00:00.000Z	19 \| good	1.253 \| good	5.049 \| good	20.981 \| good	0.37 \| good	2.979 \| good	0.176 \| good
2026-10-24T04:00:00.000Z	19 \| good	0.277 \| good	1.051 \| good	20.992 \| good	0.363 \| good	3.147 \| good	0.181 \| good
2026-10-24T05:00:00.000Z	19 \| good	1.104 \| good	4.081 \| good	20.899 \| good	0.356 \| good	3.208 \| good	0.185 \| good
2026-10-24T06:00:00.000Z	19 \| good	1.283 \| good	5.047 \| good	20.856 \| good	0.347 \| good	3.244 \| good	0.187 \| good
2026-10-24T07:00:00.000Z	18 \| good	0.722 \| good	3.024 \| good	19.328 \| good	0.331 \| good	3.296 \| good	0.189 \| good
2026-10-24T08:00:00.000Z	16 \| good	0.635 \| good	2.069 \| good	16.996 \| good	0.31 \| good	3.36 \| good	0.191 \| good
2026-10-24T09:00:00.000Z	13 \| good	1.065 \| good	4.07 \| good	13.77 \| good	0.286 \| good	3.493 \| good	0.193 \| good
2026-10-24T10:00:00.000Z	12 \| good	0.808 \| good	3.067 \| good	13.066 \| good	0.259 \| good	3.716 \| good	0.195 \| good
2026-10-24T11:00:00.000Z	12 \| good	0.535 \| good	2.062 \| good	12.876 \| good	0.239 \| good	3.921 \| good	0.198 \| good
2026-10-24T12:00:00.000Z	12 \| good	0.831 \| good	3.019 \| good	13.143 \| good	0.219 \| good	4.172 \| good	0.201 \| good
2026-10-24T13:00:00.000Z	14 \| good	0.756 \| good	3.068 \| good	15.489 \| good	0.2 \| good	4.475 \| good	0.205 \| good
2026-10-24T14:00:00.000Z	9 \| good	0.201 \| good	0.125 \| good	10.272 \| good	0.189 \| good	4.822 \| good	0.209 \| good
2026-10-24T15:00:00.000Z	11 \| good	1.773 \| good	7.058 \| good	9.736 \| good	0.185 \| good	4.426 \| good	0.216 \| good
2026-10-24T16:00:00.000Z	17 \| good	1.506 \| good	6.074 \| good	18.076 \| good	0.21 \| good	3.022 \| good	0.215 \| good
2026-10-24T17:00:00.000Z	24 \| good	0.32 \| good	1.09 \| good	25.856 \| good	0.291 \| good	2.201 \| good	0.197 \| good
2026-10-24T18:00:00.000Z	31 \| good	0.422 \| good	2.021 \| good	33.964 \| good	0.379 \| good	0.943 \| good	0.16 \| good
2026-10-24T19:00:00.000Z	31 \| good	1.051 \| good	3.971 \| good	32.532 \| good	0.374 \| good	0.598 \| good	0.147 \| good

Walla Walla

Get reliable air quality data to drive your business

Walla Walla, Washington air quality map: Stay updated on AQI near you

0.35ppm

How accurate is Washington, USA air quality data?

Air quality and pollutant data for Washington, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

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Frequently asked questions

How often is air quality information updated for Walla Walla, Washington?

The air quality information for Walla Walla, Washington is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Walla Walla, Washington at its worst?

In the past 24 hours, the air quality in Walla Walla, Washington was at its worst at 07:00:00 on 2026-10-22.

When did Walla Walla, Washington experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Walla Walla, Washington was observed at 07:00:00 on 2026-10-21.

What is the AQI in Walla Walla, Washington right now?

As of now, the AQI in Walla Walla, Washington is 56, indicating Moderate conditions.

What is the most common type of pollution in Walla Walla, Washington?

Walla Walla, Washington air has the highest levels of PM2.5.

What should I do in case of poor air quality in Walla Walla, Washington?

Poor air quality in Walla Walla, Washington means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in Walla Walla, Washington at the moment?

PM_2.5 levels in Walla Walla, Washington are currently 11.987 μg/m³.

What is the PM₁₀ level in Walla Walla, Washington at the moment?

The PM₁₀ concentration in Walla Walla, Washington is 53.951 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Walla Walla, Washington at the moment?

The current carbon monoxide (CO) concentration in Walla Walla, Washington is 0.327 ppm.

What is the sulfur dioxide (SO₂) level in Walla Walla, Washington at the moment?

Currently, Walla Walla, Washington has a sulfur dioxide (SO₂) concentration of 0.934 ppb.

What is the ozone (O₃) level in Walla Walla, Washington at the moment?

The current ozone (O₃) level in Walla Walla, Washington at the moment is 18.486 ppm.

What is the nitrogen dioxide (NO₂) level in Walla Walla, Washington at the moment?

Nitrogen dioxide (NO₂) level in Walla Walla, Washington at the moment is 13.434 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T20:00:00.000Z	38 \| good	7.3 \| good	32 \| good	20.796 \| good	0.94 \| good	6.926 \| good	0.163 \| good
2026-10-20T21:00:00.000Z	38 \| good	7 \| good	31 \| good	23.984 \| good	0.941 \| good	4.167 \| good	0.156 \| good
2026-10-20T22:00:00.000Z	38 \| good	7 \| good	31 \| good	29.642 \| good	0.941 \| good	3.168 \| good	0.175 \| good
2026-10-20T23:00:00.000Z	38 \| good	7.2 \| good	32 \| good	33.307 \| good	0.86 \| good	3.953 \| good	0.175 \| good
2026-10-21T00:00:00.000Z	38 \| good	7.1 \| good	32 \| good	24.504 \| good	0.875 \| good	3.794 \| good	0.2 \| good
2026-10-21T01:00:00.000Z	38 \| good	6.9 \| good	31 \| good	28.532 \| good	0.897 \| good	6.904 \| good	0.219 \| good
2026-10-21T02:00:00.000Z	38 \| good	7.1 \| good	32 \| good	29.419 \| good	0.881 \| good	12.157 \| good	0.2 \| good
2026-10-21T03:00:00.000Z	66 \| moderate	17.404 \| fine	76.982 \| fine	19.899 \| good	0.275 \| good	7.398 \| good	0.23 \| good
2026-10-21T04:00:00.000Z	49 \| good	8.7 \| good	38 \| good	23.239 \| good	0.622 \| good	11.741 \| good	0.219 \| good
2026-10-21T05:00:00.000Z	49 \| good	8.5 \| good	37 \| good	19.574 \| good	0.622 \| good	10.061 \| good	0.225 \| good
2026-10-21T06:00:00.000Z	44 \| good	8.4 \| good	37 \| good	18.259 \| good	0.57 \| good	9.361 \| good	0.207 \| good
2026-10-21T07:00:00.000Z	44 \| good	8.3 \| good	37 \| good	15.847 \| good	0.57 \| good	9.352 \| good	0.232 \| good
2026-10-21T08:00:00.000Z	44 \| good	7.8 \| good	34 \| good	13.676 \| good	0.427 \| good	8.203 \| good	0.27 \| good
2026-10-21T09:00:00.000Z	44 \| good	7.6 \| good	34 \| good	12.976 \| good	0.833 \| good	8.53 \| good	0.306 \| good
2026-10-21T10:00:00.000Z	38 \| good	7.4 \| good	33 \| good	10.716 \| good	0.458 \| good	8.313 \| good	0.262 \| good
2026-10-21T11:00:00.000Z	38 \| good	6.9 \| good	31 \| good	11.079 \| good	0.549 \| good	7.17 \| good	0.319 \| good
2026-10-21T12:00:00.000Z	38 \| good	6.5 \| good	29 \| good	9.366 \| good	0.427 \| good	7.826 \| good	0.3 \| good
2026-10-21T13:00:00.000Z	33 \| good	6.4 \| good	29 \| good	7.13 \| good	0.427 \| good	7.821 \| good	0.292 \| good
2026-10-21T14:00:00.000Z	38 \| good	6.7 \| good	30 \| good	8.262 \| good	0.454 \| good	10.275 \| good	0.391 \| good
2026-10-21T15:00:00.000Z	38 \| good	6.9 \| good	31 \| good	4.759 \| good	0.528 \| good	12.018 \| good	0.43 \| good
2026-10-21T16:00:00.000Z	38 \| good	7 \| good	31 \| good	8.255 \| good	0.563 \| good	11.067 \| good	0.384 \| good
2026-10-21T17:00:00.000Z	49 \| good	8.9 \| good	39 \| good	11.369 \| good	0.582 \| good	9.568 \| good	0.513 \| good
2026-10-21T18:00:00.000Z	44 \| good	8.4 \| good	37 \| good	17.25 \| good	0.751 \| good	7.617 \| good	0.404 \| good
2026-10-21T19:00:00.000Z	44 \| good	8 \| good	35 \| good	25.548 \| good	0.731 \| good	3.792 \| good	0.366 \| good
2026-10-21T20:00:00.000Z	49 \| good	8.6 \| good	38 \| good	29.424 \| good	0.94 \| good	4.921 \| good	0.329 \| good
2026-10-21T21:00:00.000Z	52 \| moderate	9.7 \| good	43 \| good	32.323 \| good	1.162 \| good	3.98 \| good	0.33 \| good
2026-10-21T22:00:00.000Z	54 \| moderate	10.5 \| good	47 \| good	34.789 \| good	1.232 \| good	4.173 \| good	0.249 \| good
2026-10-21T23:00:00.000Z	52 \| moderate	10.1 \| good	45 \| good	32.025 \| good	1.774 \| good	8.311 \| good	0.268 \| good
2026-10-22T00:00:00.000Z	52 \| moderate	10.1 \| good	45 \| good	26.043 \| good	0.957 \| good	4.146 \| good	0.293 \| good
2026-10-22T01:00:00.000Z	54 \| moderate	10.9 \| good	48 \| good	31.571 \| good	0.972 \| good	7.757 \| good	0.293 \| good
2026-10-22T02:00:00.000Z	54 \| moderate	11.3 \| good	50 \| good	30.347 \| good	0.762 \| good	16.008 \| good	0.424 \| good
2026-10-22T03:00:00.000Z	56 \| moderate	12.093 \| good	54.905 \| good	23.528 \| good	0.281 \| good	6.939 \| good	0.226 \| good
2026-10-22T04:00:00.000Z	58 \| moderate	13 \| fine	59 \| fine	20.691 \| good	0.727 \| good	14.808 \| good	0.479 \| good
2026-10-22T05:00:00.000Z	58 \| moderate	13.4 \| fine	61 \| fine	17.788 \| good	0.625 \| good	14.482 \| good	0.466 \| good
2026-10-22T06:00:00.000Z	58 \| moderate	12.9 \| fine	59 \| fine	12.501 \| good	0.622 \| good	15.539 \| good	0.448 \| good
2026-10-22T07:00:00.000Z	58 \| moderate	12.5 \| fine	57 \| fine	13.664 \| good	0.622 \| good	15.536 \| good	0.454 \| good
2026-10-22T08:00:00.000Z	56 \| moderate	12.3 \| fine	55 \| fine	12.607 \| good	0.638 \| good	12.415 \| good	0.354 \| good
2026-10-22T09:00:00.000Z	56 \| moderate	12 \| good	54 \| good	10.206 \| good	0.497 \| good	9.329 \| good	0.336 \| good
2026-10-22T10:00:00.000Z	56 \| moderate	11.8 \| good	52 \| good	7.79 \| good	0.62 \| good	8.371 \| good	0.36 \| good
2026-10-22T11:00:00.000Z	56 \| moderate	11.6 \| good	51 \| good	10.657 \| good	0.527 \| good	7.185 \| good	0.36 \| good
2026-10-22T12:00:00.000Z	54 \| moderate	11.3 \| good	50 \| good	5.119 \| good	0.641 \| good	15.25 \| good	0.353 \| good
2026-10-22T13:00:00.000Z	54 \| moderate	11.1 \| good	49 \| good	5.333 \| good	0.51 \| good	14.494 \| good	0.334 \| good
2026-10-22T14:00:00.000Z	54 \| moderate	10.9 \| good	48 \| good	4.477 \| good	0.54 \| good	14.374 \| good	0.352 \| good
2026-10-22T15:00:00.000Z	54 \| moderate	11 \| good	49 \| good	6.521 \| good	0.59 \| good	13.706 \| good	0.416 \| good
2026-10-22T16:00:00.000Z	54 \| moderate	11.3 \| good	50 \| good	8.429 \| good	0.653 \| good	15.018 \| good	0.515 \| good
2026-10-22T17:00:00.000Z	56 \| moderate	11.6 \| good	51 \| good	12.312 \| good	0.703 \| good	12.738 \| good	0.471 \| good
2026-10-22T18:00:00.000Z	56 \| moderate	11.7 \| good	52 \| good	14.379 \| good	0.732 \| good	14.653 \| good	0.352 \| good
2026-10-22T19:00:00.000Z	56 \| moderate	12 \| good	54 \| good	18.464 \| good	0.933 \| good	13.466 \| good	0.327 \| good
2026-10-22T19:00:00.000Z	56 \| moderate	11.987 \| good	53.951 \| good	18.486 \| good	0.934 \| good	13.434 \| good	0.327 \| good
2026-10-22T20:00:00.000Z	33 \| good	5.797 \| good	25.099 \| good	30.456 \| good	0.219 \| good	3.352 \| good	0.2 \| good
2026-10-22T21:00:00.000Z	27 \| good	5.44 \| good	23.067 \| good	28.316 \| good	0.184 \| good	3.207 \| good	0.194 \| good
2026-10-22T22:00:00.000Z	38 \| good	6.86 \| good	30.038 \| good	28.673 \| good	0.165 \| good	3.249 \| good	0.194 \| good
2026-10-22T23:00:00.000Z	27 \| good	4.654 \| good	20.076 \| good	26.71 \| good	0.156 \| good	3.237 \| good	0.192 \| good
2026-10-23T00:00:00.000Z	26 \| good	2.519 \| good	10.09 \| good	28.308 \| good	0.148 \| good	3.483 \| good	0.192 \| good
2026-10-23T01:00:00.000Z	24 \| good	4.322 \| good	19.038 \| good	26.368 \| good	0.141 \| good	3.848 \| good	0.198 \| good
2026-10-23T02:00:00.000Z	38 \| good	6.926 \| good	30.946 \| good	25.108 \| good	0.138 \| good	3.925 \| good	0.205 \| good
2026-10-23T03:00:00.000Z	44 \| good	7.54 \| good	33.104 \| good	25.396 \| good	0.158 \| good	3.456 \| good	0.209 \| good
2026-10-23T04:00:00.000Z	28 \| good	5.276 \| good	23.249 \| good	30.417 \| good	0.195 \| good	2.902 \| good	0.217 \| good
2026-10-23T05:00:00.000Z	44 \| good	7.569 \| good	33.114 \| good	31.08 \| good	0.226 \| good	2.694 \| good	0.223 \| good
2026-10-23T06:00:00.000Z	33 \| good	6.108 \| good	26.962 \| good	31.995 \| good	0.262 \| good	2.623 \| good	0.215 \| good
2026-10-23T07:00:00.000Z	28 \| good	0.303 \| good	1.128 \| good	29.698 \| good	0.297 \| good	2.481 \| good	0.195 \| good
2026-10-23T08:00:00.000Z	23 \| good	0.133 \| good	0.062 \| good	24.815 \| good	0.32 \| good	2.279 \| good	0.176 \| good
2026-10-23T09:00:00.000Z	23 \| good	0.11 \| good	0.047 \| good	24.752 \| good	0.334 \| good	2.098 \| good	0.165 \| good
2026-10-23T10:00:00.000Z	22 \| good	0.102 \| good	0.038 \| good	24.44 \| good	0.345 \| good	1.922 \| good	0.159 \| good
2026-10-23T11:00:00.000Z	23 \| good	0.125 \| good	0.056 \| good	25.085 \| good	0.35 \| good	1.758 \| good	0.154 \| good
2026-10-23T12:00:00.000Z	24 \| good	0.102 \| good	0.041 \| good	26.386 \| good	0.355 \| good	1.588 \| good	0.15 \| good
2026-10-23T13:00:00.000Z	25 \| good	0.093 \| good	0.052 \| good	27.472 \| good	0.359 \| good	1.422 \| good	0.146 \| good
2026-10-23T14:00:00.000Z	22 \| good	0.465 \| good	1.992 \| good	24.249 \| good	0.354 \| good	1.375 \| good	0.144 \| good
2026-10-23T15:00:00.000Z	22 \| good	0.505 \| good	2.005 \| good	24.115 \| good	0.351 \| good	1.444 \| good	0.143 \| good
2026-10-23T16:00:00.000Z	24 \| good	0.585 \| good	2.04 \| good	26.47 \| good	0.354 \| good	1.329 \| good	0.143 \| good
2026-10-23T17:00:00.000Z	27 \| good	0.117 \| good	0.085 \| good	28.588 \| good	0.378 \| good	1.075 \| good	0.142 \| good
2026-10-23T18:00:00.000Z	31 \| good	0.099 \| good	0.086 \| good	33.29 \| good	0.432 \| good	0.889 \| good	0.143 \| good
2026-10-23T19:00:00.000Z	34 \| good	0.103 \| good	0.091 \| good	37.082 \| good	0.471 \| good	0.716 \| good	0.143 \| good
2026-10-23T20:00:00.000Z	36 \| good	0.223 \| good	1.061 \| good	38.894 \| good	0.485 \| good	0.603 \| good	0.143 \| good
2026-10-23T21:00:00.000Z	37 \| good	1.37 \| good	5.075 \| good	39.781 \| good	0.471 \| good	0.54 \| good	0.142 \| good
2026-10-23T22:00:00.000Z	39 \| good	2.798 \| good	11.95 \| good	41.905 \| good	0.448 \| good	0.535 \| good	0.142 \| good
2026-10-23T23:00:00.000Z	35 \| good	2.647 \| good	10.962 \| good	37.634 \| good	0.431 \| good	0.586 \| good	0.142 \| good
2026-10-24T00:00:00.000Z	31 \| good	1.166 \| good	4.998 \| good	34.139 \| good	0.413 \| good	0.916 \| good	0.145 \| good
2026-10-24T01:00:00.000Z	24 \| good	0.923 \| good	4.026 \| good	26.402 \| good	0.383 \| good	1.9 \| good	0.157 \| good
2026-10-24T02:00:00.000Z	19 \| good	3.012 \| good	12.063 \| good	19.633 \| good	0.376 \| good	2.626 \| good	0.168 \| good
2026-10-24T03:00:00.000Z	19 \| good	1.253 \| good	5.049 \| good	20.981 \| good	0.37 \| good	2.979 \| good	0.176 \| good
2026-10-24T04:00:00.000Z	19 \| good	0.277 \| good	1.051 \| good	20.992 \| good	0.363 \| good	3.147 \| good	0.181 \| good
2026-10-24T05:00:00.000Z	19 \| good	1.104 \| good	4.081 \| good	20.899 \| good	0.356 \| good	3.208 \| good	0.185 \| good
2026-10-24T06:00:00.000Z	19 \| good	1.283 \| good	5.047 \| good	20.856 \| good	0.347 \| good	3.244 \| good	0.187 \| good
2026-10-24T07:00:00.000Z	18 \| good	0.722 \| good	3.024 \| good	19.328 \| good	0.331 \| good	3.296 \| good	0.189 \| good
2026-10-24T08:00:00.000Z	16 \| good	0.635 \| good	2.069 \| good	16.996 \| good	0.31 \| good	3.36 \| good	0.191 \| good
2026-10-24T09:00:00.000Z	13 \| good	1.065 \| good	4.07 \| good	13.77 \| good	0.286 \| good	3.493 \| good	0.193 \| good
2026-10-24T10:00:00.000Z	12 \| good	0.808 \| good	3.067 \| good	13.066 \| good	0.259 \| good	3.716 \| good	0.195 \| good
2026-10-24T11:00:00.000Z	12 \| good	0.535 \| good	2.062 \| good	12.876 \| good	0.239 \| good	3.921 \| good	0.198 \| good
2026-10-24T12:00:00.000Z	12 \| good	0.831 \| good	3.019 \| good	13.143 \| good	0.219 \| good	4.172 \| good	0.201 \| good
2026-10-24T13:00:00.000Z	14 \| good	0.756 \| good	3.068 \| good	15.489 \| good	0.2 \| good	4.475 \| good	0.205 \| good
2026-10-24T14:00:00.000Z	9 \| good	0.201 \| good	0.125 \| good	10.272 \| good	0.189 \| good	4.822 \| good	0.209 \| good
2026-10-24T15:00:00.000Z	11 \| good	1.773 \| good	7.058 \| good	9.736 \| good	0.185 \| good	4.426 \| good	0.216 \| good
2026-10-24T16:00:00.000Z	17 \| good	1.506 \| good	6.074 \| good	18.076 \| good	0.21 \| good	3.022 \| good	0.215 \| good
2026-10-24T17:00:00.000Z	24 \| good	0.32 \| good	1.09 \| good	25.856 \| good	0.291 \| good	2.201 \| good	0.197 \| good
2026-10-24T18:00:00.000Z	31 \| good	0.422 \| good	2.021 \| good	33.964 \| good	0.379 \| good	0.943 \| good	0.16 \| good
2026-10-24T19:00:00.000Z	31 \| good	1.051 \| good	3.971 \| good	32.532 \| good	0.374 \| good	0.598 \| good	0.147 \| good

Live air quality index in Walla Walla, Washington today

Major air pollutants in Walla Walla, Washington

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Air quality in nearby cities

Pendleton, Oregon

Pasco, Washington

Kennewick, Washington

Richland, Washington

Hermiston, Oregon

West Richland, Washington

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Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

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What is the ozone (O₃) level in Walla Walla, Washington at the moment?

What is the nitrogen dioxide (NO₂) level in Walla Walla, Washington at the moment?