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

The PM10 concentration in Walnut, California is 37.903 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 0.733 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 18.338 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 20.023 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 11.483 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)

Moderate

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)

11.48 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

37.90 μg/m³

155

255

425

605+

Ozone (O₃)

18.34 ppb

201

201+

Sulfur Dioxide (SO₂)

0.73 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

20.02 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.57 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

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

Please contact us for custom requests

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
2026-03-12T15:00:00.000Z	58 \| moderate	12.855 \| fine	43.744 \| good	18.53 \| good	0.884 \| good	19.518 \| good	0.931 \| good
2026-03-12T16:00:00.000Z	58 \| moderate	12.635 \| fine	47.677 \| good	18.827 \| good	1.089 \| good	24.216 \| good	0.897 \| good
2026-03-12T17:00:00.000Z	56 \| moderate	12.154 \| fine	45.301 \| good	25.732 \| good	0.773 \| good	19.429 \| good	0.614 \| good
2026-03-12T18:00:00.000Z	60 \| moderate	13.917 \| fine	57.939 \| fine	30.217 \| good	0.516 \| good	17.142 \| good	0.531 \| good
2026-03-12T19:00:00.000Z	52 \| moderate	10.422 \| good	45.604 \| good	33.452 \| good	0.667 \| good	16.938 \| good	0.425 \| good
2026-03-12T20:00:00.000Z	44 \| good	8.056 \| good	31.764 \| good	43.529 \| good	0.404 \| good	9.699 \| good	0.218 \| good
2026-03-12T21:00:00.000Z	45 \| good	6.048 \| good	24.698 \| good	49.161 \| good	0.379 \| good	6.155 \| good	0.269 \| good
2026-03-12T22:00:00.000Z	51 \| moderate	5.745 \| good	26.511 \| good	54.628 \| good	0.471 \| good	4.276 \| good	0.237 \| good
2026-03-12T23:00:00.000Z	64 \| moderate	4.761 \| good	23.821 \| good	58.79 \| fine	0.469 \| good	4.108 \| good	0.27 \| good
2026-03-13T00:00:00.000Z	71 \| moderate	5.673 \| good	26.237 \| good	61.201 \| fine	0.547 \| good	4.826 \| good	0.238 \| good
2026-03-13T01:00:00.000Z	67 \| moderate	7.102 \| good	30.469 \| good	59.54 \| fine	1.13 \| good	7.17 \| good	0.305 \| good
2026-03-13T02:00:00.000Z	51 \| moderate	5.748 \| good	21.87 \| good	55.061 \| fine	0.886 \| good	8.71 \| good	0.317 \| good
2026-03-13T03:00:00.000Z	47 \| good	5.323 \| good	20.498 \| good	50.703 \| good	0.701 \| good	12.01 \| good	0.355 \| good
2026-03-13T04:00:00.000Z	37 \| good	4.002 \| good	19.077 \| good	40.01 \| good	0.615 \| good	20.931 \| good	0.481 \| good
2026-03-13T05:00:00.000Z	33 \| good	6.354 \| good	24.224 \| good	34.519 \| good	0.985 \| good	29.843 \| good	0.618 \| good
2026-03-13T06:00:00.000Z	44 \| good	8.125 \| good	34.377 \| good	26.427 \| good	0.641 \| good	32.39 \| good	0.634 \| good
2026-03-13T07:00:00.000Z	44 \| good	7.752 \| good	31.889 \| good	26.427 \| good	0.646 \| good	34.165 \| good	0.635 \| good
2026-03-13T08:00:00.000Z	38 \| good	7.222 \| good	30.49 \| good	19.236 \| good	0.819 \| good	32.423 \| good	0.636 \| good
2026-03-13T09:00:00.000Z	38 \| good	6.762 \| good	29.388 \| good	17.621 \| good	0.583 \| good	26.772 \| good	0.643 \| good
2026-03-13T10:00:00.000Z	33 \| good	6.237 \| good	25.217 \| good	15.965 \| good	0.611 \| good	26.177 \| good	0.631 \| good
2026-03-13T11:00:00.000Z	33 \| good	5.712 \| good	22.952 \| good	15.069 \| good	0.812 \| good	25.828 \| good	0.516 \| good
2026-03-13T12:00:00.000Z	33 \| good	5.787 \| good	23.958 \| good	15.069 \| good	0.807 \| good	26.899 \| good	0.516 \| good
2026-03-13T13:00:00.000Z	27 \| good	5.241 \| good	18.322 \| good	15.651 \| good	0.583 \| good	28.238 \| good	0.427 \| good
2026-03-13T14:00:00.000Z	27 \| good	5.489 \| good	20.321 \| good	15.444 \| good	0.775 \| good	28.497 \| good	0.822 \| good
2026-03-13T15:00:00.000Z	38 \| good	6.564 \| good	24.959 \| good	16.172 \| good	0.982 \| good	31.924 \| good	1.024 \| good
2026-03-13T16:00:00.000Z	33 \| good	6.187 \| good	23.999 \| good	18.007 \| good	1.553 \| good	34.504 \| good	0.92 \| good
2026-03-13T17:00:00.000Z	38 \| good	6.662 \| good	33.689 \| good	19.48 \| good	0.914 \| good	31.251 \| good	0.687 \| good
2026-03-13T18:00:00.000Z	44 \| good	8.073 \| good	39.006 \| good	23.162 \| good	0.631 \| good	22.409 \| good	0.6 \| good
2026-03-13T19:00:00.000Z	38 \| good	7.087 \| good	40.704 \| good	33.702 \| good	0.558 \| good	15.34 \| good	0.55 \| good
2026-03-13T20:00:00.000Z	39 \| good	7.021 \| good	35.965 \| good	42.011 \| good	0.462 \| good	14.5 \| good	0.453 \| good
2026-03-13T21:00:00.000Z	46 \| good	5.981 \| good	28.072 \| good	50.221 \| good	0.568 \| good	11.716 \| good	0.384 \| good
2026-03-13T22:00:00.000Z	51 \| moderate	6.484 \| good	32.926 \| good	55.107 \| fine	0.694 \| good	8.969 \| good	0.405 \| good
2026-03-13T23:00:00.000Z	61 \| moderate	6.445 \| good	37.709 \| good	58.437 \| fine	0.719 \| good	7.337 \| good	0.437 \| good
2026-03-14T00:00:00.000Z	61 \| moderate	7.019 \| good	30.943 \| good	57.946 \| fine	0.725 \| good	14.044 \| good	0.462 \| good
2026-03-14T01:00:00.000Z	64 \| moderate	6.708 \| good	27.997 \| good	59.351 \| fine	1.374 \| good	15.498 \| good	0.548 \| good
2026-03-14T02:00:00.000Z	58 \| moderate	6.146 \| good	36.859 \| good	57.397 \| fine	0.968 \| good	23.739 \| good	0.549 \| good
2026-03-14T03:00:00.000Z	45 \| good	8.378 \| good	35.841 \| good	48.69 \| good	0.723 \| good	27.739 \| good	0.602 \| good
2026-03-14T04:00:00.000Z	52 \| moderate	10 \| good	32.576 \| good	42.076 \| good	1.024 \| good	26.917 \| good	0.723 \| good
2026-03-14T05:00:00.000Z	58 \| moderate	12.63 \| fine	50.62 \| good	35.942 \| good	1.138 \| good	27.514 \| good	0.891 \| good
2026-03-14T06:00:00.000Z	56 \| moderate	11.934 \| good	44.323 \| good	30.16 \| good	0.896 \| good	26.481 \| good	0.843 \| good
2026-03-14T07:00:00.000Z	56 \| moderate	11.895 \| good	61.552 \| fine	30.16 \| good	0.918 \| good	26.481 \| good	0.843 \| good
2026-03-14T08:00:00.000Z	52 \| moderate	10.214 \| good	40.267 \| good	23.052 \| good	0.798 \| good	24.171 \| good	0.898 \| good
2026-03-14T09:00:00.000Z	58 \| moderate	12.757 \| fine	42.798 \| good	21.992 \| good	0.784 \| good	20.165 \| good	0.728 \| good
2026-03-14T10:00:00.000Z	58 \| moderate	12.606 \| fine	43.048 \| good	21.358 \| good	0.814 \| good	18.727 \| good	0.601 \| good
2026-03-14T11:00:00.000Z	56 \| moderate	12.142 \| fine	39.503 \| good	19.067 \| good	0.852 \| good	17.173 \| good	0.583 \| good
2026-03-14T12:00:00.000Z	58 \| moderate	12.786 \| fine	50.588 \| good	18.338 \| good	0.756 \| good	20.023 \| good	0.571 \| good
2026-03-14T13:00:00.000Z	54 \| moderate	11.483 \| good	37.903 \| good	18.338 \| good	0.733 \| good	20.023 \| good	0.571 \| good
2026-03-14T14:00:00.000Z	54 \| moderate	11.483 \| good	37.903 \| good	18.338 \| good	0.733 \| good	20.023 \| good	0.571 \| good
2026-03-14T15:00:00.000Z	99 \| moderate	34.605 \| fine	150.779 \| fine	16.891 \| good	5.916 \| good	34.483 \| good	0.42 \| good
2026-03-14T16:00:00.000Z	107 \| sensitive	38.137 \| moderate	168.083 \| moderate	25.768 \| good	6.043 \| good	30.095 \| good	0.378 \| good
2026-03-14T17:00:00.000Z	97 \| moderate	33.525 \| fine	145.301 \| fine	39.696 \| good	6.169 \| good	25.706 \| good	0.337 \| good
2026-03-14T18:00:00.000Z	71 \| moderate	19.939 \| fine	87.932 \| fine	55.16 \| fine	6.296 \| good	21.317 \| good	0.295 \| good
2026-03-14T19:00:00.000Z	74 \| moderate	17.223 \| fine	76.155 \| fine	62.322 \| fine	5.57 \| good	17.651 \| good	0.269 \| good
2026-03-14T20:00:00.000Z	87 \| moderate	15.19 \| fine	68.173 \| fine	66.415 \| fine	4.844 \| good	13.984 \| good	0.242 \| good
2026-03-14T21:00:00.000Z	97 \| moderate	14.672 \| fine	65.595 \| fine	69.391 \| fine	4.118 \| good	10.318 \| good	0.216 \| good
2026-03-14T22:00:00.000Z	93 \| moderate	13.651 \| fine	60.977 \| fine	68.468 \| fine	4.04 \| good	10.939 \| good	0.213 \| good
2026-03-14T23:00:00.000Z	77 \| moderate	9.856 \| good	43.981 \| good	62.797 \| fine	3.963 \| good	11.56 \| good	0.209 \| good
2026-03-15T00:00:00.000Z	51 \| moderate	9.455 \| good	42.006 \| good	54.838 \| good	3.885 \| good	12.182 \| good	0.206 \| good
2026-03-15T01:00:00.000Z	49 \| good	9.492 \| good	41.991 \| good	44.876 \| good	4.028 \| good	18.191 \| good	0.228 \| good
2026-03-15T02:00:00.000Z	38 \| good	6.661 \| good	29.919 \| good	33.898 \| good	4.171 \| good	24.201 \| good	0.249 \| good
2026-03-15T03:00:00.000Z	29 \| good	3.962 \| good	17.509 \| good	30.542 \| good	4.314 \| good	30.21 \| good	0.271 \| good
2026-03-15T04:00:00.000Z	33 \| good	5.566 \| good	24.556 \| good	24.785 \| good	4.501 \| good	35.036 \| good	0.289 \| good
2026-03-15T05:00:00.000Z	38 \| good	6.354 \| good	27.98 \| good	18.876 \| good	4.688 \| good	39.862 \| good	0.306 \| good
2026-03-15T06:00:00.000Z	44 \| good	7.549 \| good	33.126 \| good	14.885 \| good	4.875 \| good	44.688 \| good	0.324 \| good
2026-03-15T07:00:00.000Z	42 \| good	6.329 \| good	28.122 \| good	12.674 \| good	4.803 \| good	44.01 \| good	0.335 \| good
2026-03-15T08:00:00.000Z	41 \| good	6.65 \| good	29.502 \| good	14.746 \| good	4.73 \| good	43.331 \| good	0.346 \| good
2026-03-15T09:00:00.000Z	41 \| good	6.919 \| good	30.454 \| good	13.546 \| good	4.658 \| good	42.653 \| good	0.356 \| good
2026-03-15T10:00:00.000Z	38 \| good	7.256 \| good	32.381 \| good	14.383 \| good	4.433 \| good	39.219 \| good	0.347 \| good
2026-03-15T11:00:00.000Z	38 \| good	6.722 \| good	29.565 \| good	16.833 \| good	4.208 \| good	35.785 \| good	0.337 \| good
2026-03-15T12:00:00.000Z	38 \| good	6.968 \| good	31.049 \| good	16.58 \| good	3.983 \| good	32.351 \| good	0.328 \| good
2026-03-15T13:00:00.000Z	38 \| good	7.211 \| good	32.183 \| good	15.692 \| good	3.747 \| good	30.271 \| good	0.321 \| good
2026-03-15T14:00:00.000Z	52 \| moderate	9.69 \| good	43.112 \| good	15.743 \| good	3.512 \| good	28.191 \| good	0.314 \| good
2026-03-15T15:00:00.000Z	54 \| moderate	10.726 \| good	48.056 \| good	20.408 \| good	3.276 \| good	26.111 \| good	0.308 \| good
2026-03-15T16:00:00.000Z	58 \| moderate	12.979 \| fine	58.085 \| fine	27.066 \| good	3.603 \| good	24.086 \| good	0.288 \| good
2026-03-15T17:00:00.000Z	60 \| moderate	13.737 \| fine	61.978 \| fine	34.708 \| good	3.93 \| good	22.06 \| good	0.268 \| good
2026-03-15T18:00:00.000Z	60 \| moderate	13.877 \| fine	61.848 \| fine	42.402 \| good	4.257 \| good	20.034 \| good	0.247 \| good
2026-03-15T19:00:00.000Z	60 \| moderate	14.478 \| fine	64.401 \| fine	49.802 \| good	4.461 \| good	19.374 \| good	0.242 \| good
2026-03-15T20:00:00.000Z	66 \| moderate	17.002 \| fine	75.235 \| fine	56.49 \| fine	4.665 \| good	18.714 \| good	0.236 \| good
2026-03-15T21:00:00.000Z	80 \| moderate	17.463 \| fine	77.008 \| fine	64.365 \| fine	4.869 \| good	18.054 \| good	0.23 \| good
2026-03-15T22:00:00.000Z	97 \| moderate	16.629 \| fine	73.974 \| fine	69.309 \| fine	5.02 \| good	18.284 \| good	0.226 \| good
2026-03-15T23:00:00.000Z	112 \| sensitive	16.208 \| fine	72.345 \| fine	73.884 \| moderate	5.171 \| good	18.515 \| good	0.222 \| good
2026-03-16T00:00:00.000Z	101 \| sensitive	16.641 \| fine	74.17 \| fine	70.949 \| fine	5.322 \| good	18.745 \| good	0.218 \| good
2026-03-16T01:00:00.000Z	71 \| moderate	12.761 \| fine	57.25 \| fine	60.981 \| fine	5.288 \| good	26.193 \| good	0.244 \| good
2026-03-16T02:00:00.000Z	54 \| moderate	11.21 \| good	49.581 \| good	46.724 \| good	5.253 \| good	33.642 \| good	0.271 \| good
2026-03-16T03:00:00.000Z	52 \| moderate	9.596 \| good	42.144 \| good	36.025 \| good	5.219 \| good	41.09 \| good	0.297 \| good
2026-03-16T04:00:00.000Z	56 \| moderate	11.545 \| good	51.373 \| good	28.289 \| good	5.226 \| good	42.402 \| good	0.321 \| good
2026-03-16T05:00:00.000Z	60 \| moderate	13.93 \| fine	62.771 \| fine	21.524 \| good	5.232 \| good	43.714 \| good	0.345 \| good
2026-03-16T06:00:00.000Z	64 \| moderate	16.164 \| fine	72.225 \| fine	18.394 \| good	5.239 \| good	45.026 \| good	0.369 \| good
2026-03-16T07:00:00.000Z	64 \| moderate	16.452 \| fine	72.83 \| fine	17.449 \| good	4.949 \| good	43.236 \| good	0.375 \| good
2026-03-16T08:00:00.000Z	66 \| moderate	16.676 \| fine	73.656 \| fine	15.938 \| good	4.659 \| good	41.446 \| good	0.38 \| good
2026-03-16T09:00:00.000Z	62 \| moderate	14.854 \| fine	65.999 \| fine	13.38 \| good	4.37 \| good	39.655 \| good	0.386 \| good
2026-03-16T10:00:00.000Z	58 \| moderate	12.946 \| fine	58.037 \| fine	11.143 \| good	3.716 \| good	36.288 \| good	0.366 \| good
2026-03-16T11:00:00.000Z	54 \| moderate	11.292 \| good	50.259 \| good	10.882 \| good	3.062 \| good	32.92 \| good	0.345 \| good
2026-03-16T12:00:00.000Z	54 \| moderate	11.453 \| good	51.216 \| good	9.511 \| good	2.408 \| good	29.552 \| good	0.325 \| good
2026-03-16T13:00:00.000Z	49 \| good	9.335 \| good	41.12 \| good	5.779 \| good	2.303 \| good	28.165 \| good	0.328 \| good
2026-03-16T14:00:00.000Z	52 \| moderate	10.247 \| good	45.341 \| good	5.989 \| good	2.197 \| good	26.778 \| good	0.33 \| good

Walnut

Get reliable air quality data to drive your business

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

0.56ppm

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

Air quality levels in US

Check live rankings of places in the USA affected by air pollution.

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

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 01:00:00 on 2026-03-14.

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 2026-03-13.

What is the AQI in Walnut, California right now?

As of now, the AQI in Walnut, California is 54, indicating Moderate conditions.

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

Walnut, California air has the highest levels of PM2.5.

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 11.483 μg/m³.

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

The PM₁₀ concentration in Walnut, California is 37.903 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 0.571 ppm.

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

Currently, Walnut, California has a sulfur dioxide (SO₂) concentration of 0.733 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 18.338 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 20.023 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions