What is the PM10 level in Walnut, California at the moment?

The PM10 concentration in Walnut, California is 30.583 μg/m3 at the moment.

What is the sulfur dioxide (SO2) level in Walnut, California at the moment?

Currently, Walnut, California has a sulfur dioxide (SO2) concentration of 0.469 ppb.

What is the ozone (O3) level in Walnut, California at the moment?

The current ozone (O3) level in Walnut, California at the moment is 46.232 ppm.

What is the nitrogen dioxide (NO2) level in Walnut, California at the moment?

Nitrogen dioxide (NO2) level in Walnut, California at the moment is 5.357 ppb.

Live air quality index in Walnut, California today

Q: What is the PM2.5 level in Walnut, California at the moment?

PM2.5 levels in Walnut, California are currently 6.345 μg/m3.

Stay updated with real-time air quality in Walnut, California 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)

Good

Walnut, California

Last updated: ... (Local time)

Major air pollutants in Walnut, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

6.34 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

30.58 μg/m³

155

255

425

605+

Ozone (O₃)

46.23 ppb

201

201+

Sulfur Dioxide (SO₂)

0.47 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.36 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.29 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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Walnut, California

Scroll To Air Quality Map

Track live Walnut, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-03-08T01:00:00.000Z	36 \| good	2.17 \| good	14.431 \| good	39.076 \| good	0.396 \| good	1.127 \| good	0.133 \| good
2026-03-08T02:00:00.000Z	36 \| good	1.472 \| good	13.732 \| good	38.581 \| good	0.367 \| good	1.428 \| good	0.154 \| good
2026-03-08T03:00:00.000Z	27 \| good	4.894 \| good	21.146 \| good	28.686 \| good	0.903 \| good	11.233 \| good	0.167 \| good
2026-03-08T04:00:00.000Z	35 \| good	3.436 \| good	17.259 \| good	38.481 \| good	0.411 \| good	5.573 \| good	0.264 \| good
2026-03-08T05:00:00.000Z	31 \| good	3.795 \| good	18.868 \| good	33.149 \| good	0.498 \| good	13.518 \| good	0.409 \| good
2026-03-08T06:00:00.000Z	31 \| good	3.564 \| good	18.733 \| good	33.149 \| good	0.362 \| good	13.06 \| good	0.509 \| good
2026-03-08T07:00:00.000Z	30 \| good	3.689 \| good	17.735 \| good	32.21 \| good	0.358 \| good	13.122 \| good	0.509 \| good
2026-03-08T08:00:00.000Z	27 \| good	3.097 \| good	15.098 \| good	28.674 \| good	0.38 \| good	13.824 \| good	0.368 \| good
2026-03-08T09:00:00.000Z	25 \| good	3.207 \| good	16.699 \| good	26.619 \| good	0.329 \| good	10.67 \| good	0.316 \| good
2026-03-08T10:00:00.000Z	25 \| good	2.368 \| good	21.566 \| good	26.619 \| good	0.334 \| good	10.711 \| good	0.316 \| good
2026-03-08T11:00:00.000Z	25 \| good	3.827 \| good	27.297 \| good	26.619 \| good	0.342 \| good	9.849 \| good	0.316 \| good
2026-03-08T12:00:00.000Z	25 \| good	4.165 \| good	20.753 \| good	26.619 \| good	0.404 \| good	7.528 \| good	0.297 \| good
2026-03-08T13:00:00.000Z	33 \| good	6.498 \| good	27.48 \| good	26.619 \| good	0.5 \| good	6.607 \| good	0.297 \| good
2026-03-08T14:00:00.000Z	23 \| good	3.09 \| good	13.71 \| good	25.32 \| good	0.451 \| good	14.654 \| good	0.608 \| good
2026-03-08T15:00:00.000Z	27 \| good	4.765 \| good	15.541 \| good	23.346 \| good	0.61 \| good	16.735 \| good	0.687 \| good
2026-03-08T16:00:00.000Z	23 \| good	3.483 \| good	12.21 \| good	25.425 \| good	0.57 \| good	14.357 \| good	0.698 \| good
2026-03-08T17:00:00.000Z	26 \| good	3.702 \| good	14.455 \| good	27.56 \| good	0.527 \| good	10.4 \| good	0.531 \| good
2026-03-08T18:00:00.000Z	31 \| good	4.563 \| good	19.729 \| good	34.001 \| good	0.468 \| good	6.157 \| good	0.369 \| good
2026-03-08T19:00:00.000Z	36 \| good	6.475 \| good	24.75 \| good	38.73 \| good	0.41 \| good	2.441 \| good	0.256 \| good
2026-03-08T20:00:00.000Z	39 \| good	3.309 \| good	18.53 \| good	42.432 \| good	0.384 \| good	2.208 \| good	0.206 \| good
2026-03-08T21:00:00.000Z	40 \| good	2.528 \| good	11.236 \| good	43.409 \| good	0.447 \| good	1.268 \| good	0.177 \| good
2026-03-08T22:00:00.000Z	44 \| good	2.73 \| good	11.715 \| good	46.656 \| good	0.677 \| good	1.508 \| good	0.177 \| good
2026-03-08T23:00:00.000Z	45 \| good	1.038 \| good	9.77 \| good	48.883 \| good	0.44 \| good	1.592 \| good	0.166 \| good
2026-03-09T00:00:00.000Z	44 \| good	2.204 \| good	10.406 \| good	47.194 \| good	0.379 \| good	1.565 \| good	0.199 \| good
2026-03-09T01:00:00.000Z	42 \| good	2.302 \| good	12.032 \| good	45.3 \| good	0.425 \| good	2.159 \| good	0.167 \| good
2026-03-09T02:00:00.000Z	41 \| good	2.316 \| good	16.167 \| good	43.545 \| good	0.456 \| good	3.732 \| good	0.187 \| good
2026-03-09T03:00:00.000Z	49 \| good	8.974 \| good	39.864 \| good	28.196 \| good	1.957 \| good	38.159 \| good	0.362 \| good
2026-03-09T04:00:00.000Z	33 \| good	5.393 \| good	20.321 \| good	36.346 \| good	0.467 \| good	16.168 \| good	0.566 \| good
2026-03-09T05:00:00.000Z	34 \| good	5.658 \| good	24.072 \| good	36.995 \| good	0.593 \| good	11.016 \| good	0.43 \| good
2026-03-09T06:00:00.000Z	35 \| good	4.582 \| good	21.421 \| good	37.864 \| good	0.379 \| good	5.074 \| good	0.346 \| good
2026-03-09T07:00:00.000Z	35 \| good	4.693 \| good	22.463 \| good	37.864 \| good	0.399 \| good	5.074 \| good	0.347 \| good
2026-03-09T08:00:00.000Z	30 \| good	4.879 \| good	20.827 \| good	31.803 \| good	0.567 \| good	6.341 \| good	0.304 \| good
2026-03-09T09:00:00.000Z	33 \| good	4.47 \| good	19.194 \| good	36.376 \| good	0.528 \| good	3.507 \| good	0.197 \| good
2026-03-09T10:00:00.000Z	33 \| good	4.888 \| good	21.131 \| good	35.961 \| good	0.494 \| good	1.623 \| good	0.193 \| good
2026-03-09T11:00:00.000Z	31 \| good	4.432 \| good	19.815 \| good	33.371 \| good	0.6 \| good	3.748 \| good	0.233 \| good
2026-03-09T12:00:00.000Z	28 \| good	3.884 \| good	18.839 \| good	29.965 \| good	0.502 \| good	7.727 \| good	0.294 \| good
2026-03-09T13:00:00.000Z	28 \| good	3.729 \| good	19.667 \| good	29.965 \| good	0.51 \| good	7.727 \| good	0.294 \| good
2026-03-09T14:00:00.000Z	27 \| good	5.034 \| good	25.803 \| good	25.265 \| good	0.615 \| good	17.087 \| good	0.59 \| good
2026-03-09T15:00:00.000Z	33 \| good	6.25 \| good	25.18 \| good	22.166 \| good	0.729 \| good	19.377 \| good	0.693 \| good
2026-03-09T16:00:00.000Z	33 \| good	5.694 \| good	26.678 \| good	22.529 \| good	0.757 \| good	18.345 \| good	0.585 \| good
2026-03-09T17:00:00.000Z	38 \| good	6.812 \| good	30.1 \| good	28.191 \| good	0.722 \| good	9.823 \| good	0.358 \| good
2026-03-09T18:00:00.000Z	33 \| good	5.761 \| good	28.881 \| good	34.283 \| good	0.622 \| good	5.032 \| good	0.307 \| good
2026-03-09T19:00:00.000Z	35 \| good	5.038 \| good	26.842 \| good	37.889 \| good	0.565 \| good	3.236 \| good	0.246 \| good
2026-03-09T20:00:00.000Z	38 \| good	5.214 \| good	27.857 \| good	41.253 \| good	0.524 \| good	2.866 \| good	0.246 \| good
2026-03-09T21:00:00.000Z	42 \| good	5.351 \| good	28.611 \| good	45.411 \| good	0.536 \| good	2.937 \| good	0.279 \| good
2026-03-09T22:00:00.000Z	44 \| good	5.07 \| good	23.467 \| good	48.043 \| good	0.442 \| good	2.71 \| good	0.267 \| good
2026-03-09T23:00:00.000Z	44 \| good	4.589 \| good	27.13 \| good	47.733 \| good	0.459 \| good	4.383 \| good	0.288 \| good
2026-03-10T00:00:00.000Z	43 \| good	6.345 \| good	30.583 \| good	46.232 \| good	0.469 \| good	5.357 \| good	0.295 \| good
2026-03-10T00:00:00.000Z	43 \| good	6.345 \| good	30.583 \| good	46.232 \| good	0.469 \| good	5.357 \| good	0.295 \| good
2026-03-10T01:00:00.000Z	40 \| good	3.268 \| good	13.425 \| good	42.977 \| good	2.801 \| good	9.742 \| good	0.158 \| good
2026-03-10T02:00:00.000Z	32 \| good	3.912 \| good	17.163 \| good	35.102 \| good	3.01 \| good	13.757 \| good	0.171 \| good
2026-03-10T03:00:00.000Z	34 \| good	5.306 \| good	22.824 \| good	36.651 \| good	3.219 \| good	17.773 \| good	0.185 \| good
2026-03-10T04:00:00.000Z	31 \| good	3.534 \| good	15.638 \| good	33.409 \| good	3.571 \| good	22.424 \| good	0.2 \| good
2026-03-10T05:00:00.000Z	33 \| good	5.703 \| good	25.347 \| good	28.897 \| good	3.923 \| good	27.075 \| good	0.214 \| good
2026-03-10T06:00:00.000Z	38 \| good	7.132 \| good	31.295 \| good	24.053 \| good	4.275 \| good	31.726 \| good	0.229 \| good
2026-03-10T07:00:00.000Z	44 \| good	7.572 \| good	33.391 \| good	18.091 \| good	4.35 \| good	33.708 \| good	0.24 \| good
2026-03-10T08:00:00.000Z	54 \| moderate	10.528 \| good	46.686 \| good	14.134 \| good	4.424 \| good	35.69 \| good	0.251 \| good
2026-03-10T09:00:00.000Z	54 \| moderate	11.218 \| good	49.494 \| good	12.386 \| good	4.499 \| good	37.672 \| good	0.263 \| good
2026-03-10T10:00:00.000Z	56 \| moderate	12.438 \| fine	56.213 \| fine	11.886 \| good	4.424 \| good	36.148 \| good	0.261 \| good
2026-03-10T11:00:00.000Z	60 \| moderate	14.07 \| fine	63.295 \| fine	13.482 \| good	4.35 \| good	34.625 \| good	0.259 \| good
2026-03-10T12:00:00.000Z	62 \| moderate	15.466 \| fine	68.973 \| fine	8.007 \| good	4.275 \| good	33.101 \| good	0.258 \| good
2026-03-10T13:00:00.000Z	66 \| moderate	17.413 \| fine	77.047 \| fine	8.533 \| good	4.202 \| good	31.546 \| good	0.287 \| good
2026-03-10T14:00:00.000Z	66 \| moderate	17.108 \| fine	75.681 \| fine	11.25 \| good	4.129 \| good	29.991 \| good	0.316 \| good
2026-03-10T15:00:00.000Z	64 \| moderate	15.932 \| fine	71.601 \| fine	14.664 \| good	4.055 \| good	28.436 \| good	0.345 \| good
2026-03-10T16:00:00.000Z	54 \| moderate	11.428 \| good	50.724 \| good	24.422 \| good	4.56 \| good	23.336 \| good	0.29 \| good
2026-03-10T17:00:00.000Z	52 \| moderate	9.938 \| good	43.932 \| good	32.37 \| good	5.064 \| good	18.236 \| good	0.235 \| good
2026-03-10T18:00:00.000Z	44 \| good	7.819 \| good	34.495 \| good	34.126 \| good	5.568 \| good	13.135 \| good	0.18 \| good
2026-03-10T19:00:00.000Z	44 \| good	7.748 \| good	34.085 \| good	36.686 \| good	5.228 \| good	11.705 \| good	0.174 \| good
2026-03-10T20:00:00.000Z	38 \| good	7.141 \| good	31.332 \| good	39.58 \| good	4.888 \| good	10.274 \| good	0.169 \| good
2026-03-10T21:00:00.000Z	44 \| good	7.957 \| good	35.117 \| good	43.05 \| good	4.548 \| good	8.843 \| good	0.163 \| good
2026-03-10T22:00:00.000Z	44 \| good	6.85 \| good	30.132 \| good	47.034 \| good	4.374 \| good	8.756 \| good	0.161 \| good
2026-03-10T23:00:00.000Z	44 \| good	4.735 \| good	20.5 \| good	47.644 \| good	4.2 \| good	8.669 \| good	0.159 \| good
2026-03-11T00:00:00.000Z	44 \| good	5.517 \| good	23.847 \| good	47.158 \| good	4.026 \| good	8.582 \| good	0.157 \| good
2026-03-11T01:00:00.000Z	37 \| good	5.273 \| good	22.62 \| good	39.777 \| good	3.976 \| good	11.985 \| good	0.168 \| good
2026-03-11T02:00:00.000Z	30 \| good	4.231 \| good	18.732 \| good	31.522 \| good	3.927 \| good	15.388 \| good	0.18 \| good
2026-03-11T03:00:00.000Z	28 \| good	4.965 \| good	21.498 \| good	30.123 \| good	3.878 \| good	18.791 \| good	0.192 \| good
2026-03-11T04:00:00.000Z	27 \| good	4.682 \| good	20.437 \| good	23.892 \| good	4.132 \| good	23.792 \| good	0.207 \| good
2026-03-11T05:00:00.000Z	33 \| good	6.38 \| good	28.119 \| good	16.432 \| good	4.387 \| good	28.792 \| good	0.222 \| good
2026-03-11T06:00:00.000Z	75 \| moderate	21.616 \| fine	26.148 \| good	9.989 \| good	4.682 \| good	33.743 \| good	0.236 \| good
2026-03-11T07:00:00.000Z	52 \| moderate	9.555 \| good	42.425 \| good	9.766 \| good	4.502 \| good	34.58 \| good	0.249 \| good
2026-03-11T08:00:00.000Z	54 \| moderate	11.478 \| good	50.705 \| good	17.137 \| good	4.362 \| good	35.367 \| good	0.261 \| good
2026-03-11T09:00:00.000Z	54 \| moderate	10.674 \| good	47.17 \| good	13.724 \| good	4.223 \| good	36.155 \| good	0.272 \| good
2026-03-11T10:00:00.000Z	56 \| moderate	11.698 \| good	52.194 \| good	8.226 \| good	3.768 \| good	34.802 \| good	0.279 \| good
2026-03-11T11:00:00.000Z	56 \| moderate	12.359 \| fine	56.021 \| fine	9.613 \| good	3.313 \| good	33.45 \| good	0.286 \| good
2026-03-11T12:00:00.000Z	86 \| moderate	27.554 \| fine	29.004 \| good	2.9 \| good	2.887 \| good	32.233 \| good	0.292 \| good
2026-03-11T13:00:00.000Z	84 \| moderate	26.959 \| fine	28.343 \| good	4.53 \| good	3.13 \| good	30.489 \| good	0.303 \| good
2026-03-11T14:00:00.000Z	84 \| moderate	27.059 \| fine	28.539 \| good	6.159 \| good	3.373 \| good	28.746 \| good	0.314 \| good
2026-03-11T15:00:00.000Z	88 \| moderate	29.254 \| fine	31.1 \| good	7.788 \| good	3.617 \| good	27.002 \| good	0.325 \| good
2026-03-11T16:00:00.000Z	88 \| moderate	28.617 \| fine	30.581 \| good	17.901 \| good	4.058 \| good	23.346 \| good	0.294 \| good
2026-03-11T17:00:00.000Z	56 \| moderate	11.872 \| good	52.476 \| good	27.176 \| good	4.427 \| good	19.491 \| good	0.262 \| good
2026-03-11T18:00:00.000Z	69 \| moderate	19.381 \| fine	24.193 \| good	38.125 \| good	4.942 \| good	16.032 \| good	0.231 \| good
2026-03-11T19:00:00.000Z	69 \| moderate	19.016 \| fine	23.705 \| good	42.123 \| good	5.117 \| good	15.27 \| good	0.223 \| good
2026-03-11T20:00:00.000Z	69 \| moderate	18.813 \| fine	23.407 \| good	46.12 \| good	5.293 \| good	14.508 \| good	0.215 \| good
2026-03-11T21:00:00.000Z	67 \| moderate	18.462 \| fine	22.965 \| good	50.117 \| good	5.468 \| good	13.746 \| good	0.207 \| good
2026-03-11T22:00:00.000Z	67 \| moderate	18.019 \| fine	22.446 \| good	50.342 \| good	5.496 \| good	13.646 \| good	0.203 \| good
2026-03-11T23:00:00.000Z	66 \| moderate	17.424 \| fine	21.709 \| good	50.566 \| good	5.523 \| good	13.545 \| good	0.199 \| good
2026-03-12T00:00:00.000Z	66 \| moderate	16.956 \| fine	21.044 \| good	50.79 \| good	5.551 \| good	13.445 \| good	0.195 \| good

Walnut

Get reliable air quality data to drive your business

Walnut, California air quality map: Stay updated on AQI near you

0.26ppm

How accurate is California, USA air quality data?

Air quality and pollutant data for California, 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 Walnut, California?

The air quality information for Walnut, California is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Walnut, California at its worst?

In the past 24 hours, the air quality in Walnut, California was at its worst at 03:00:00 on 2026-03-09.

When did Walnut, California experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Walnut, California was observed at 02:00:00 on 2026-03-09.

What is the AQI in Walnut, California right now?

As of now, the AQI in Walnut, California is 43, indicating Good conditions.

What is the most common type of pollution in Walnut, California?

Walnut, California air has the highest levels of O3.

What should I do in case of poor air quality in Walnut, California?

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

What is the PM_2.5 level in Walnut, California at the moment?

PM_2.5 levels in Walnut, California are currently 6.345 μg/m³.

What is the PM₁₀ level in Walnut, California at the moment?

The PM₁₀ concentration in Walnut, California is 30.583 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Walnut, California at the moment?

The current carbon monoxide (CO) concentration in Walnut, California is 0.295 ppm.

What is the sulfur dioxide (SO₂) level in Walnut, California at the moment?

Currently, Walnut, California has a sulfur dioxide (SO₂) concentration of 0.469 ppb.

What is the ozone (O₃) level in Walnut, California at the moment?

The current ozone (O₃) level in Walnut, California at the moment is 46.232 ppm.

What is the nitrogen dioxide (NO₂) level in Walnut, California at the moment?

Nitrogen dioxide (NO₂) level in Walnut, California at the moment is 5.357 ppb.

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