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

The PM10 concentration in Walnut, California is 55.436 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 0.942 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 74.871 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 6.759 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 12.91 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)

9.63 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

36.12 μg/m³

155

255

425

605+

Ozone (O₃)

56.41 ppb

201

201+

Sulfur Dioxide (SO₂)

0.76 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.81 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.31 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Walnut, California

Get Live Pollen Counts

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
2026-08-07T02:00:00.000Z	54 \| moderate	11.494 \| good	43.684 \| good	45.212 \| good	0.683 \| good	8.447 \| good	0.339 \| good
2026-08-07T03:00:00.000Z	54 \| moderate	10.927 \| good	48.043 \| good	28.249 \| good	1.872 \| good	10.112 \| good	0.144 \| good
2026-08-07T04:00:00.000Z	54 \| moderate	10.624 \| good	34.779 \| good	38.108 \| good	0.489 \| good	8.912 \| good	0.336 \| good
2026-08-07T05:00:00.000Z	54 \| moderate	10.68 \| good	37.912 \| good	37.429 \| good	0.575 \| good	8.08 \| good	0.357 \| good
2026-08-07T06:00:00.000Z	52 \| moderate	10.248 \| good	35.634 \| good	33.456 \| good	0.476 \| good	7.892 \| good	0.386 \| good
2026-08-07T07:00:00.000Z	52 \| moderate	10.487 \| good	36.24 \| good	33.016 \| good	0.46 \| good	7.892 \| good	0.386 \| good
2026-08-07T08:00:00.000Z	52 \| moderate	10.139 \| good	39.352 \| good	29.031 \| good	0.364 \| good	8.07 \| good	0.342 \| good
2026-08-07T09:00:00.000Z	52 \| moderate	10.3 \| good	37.132 \| good	26.521 \| good	0.431 \| good	7.448 \| good	0.353 \| good
2026-08-07T10:00:00.000Z	49 \| good	9.436 \| good	37.025 \| good	24.751 \| good	0.384 \| good	6.982 \| good	0.259 \| good
2026-08-07T11:00:00.000Z	49 \| good	9.264 \| good	30.268 \| good	22.506 \| good	0.558 \| good	7.417 \| good	0.306 \| good
2026-08-07T12:00:00.000Z	52 \| moderate	9.918 \| good	30.564 \| good	20.904 \| good	0.573 \| good	7.417 \| good	0.306 \| good
2026-08-07T13:00:00.000Z	49 \| good	9.006 \| good	30.366 \| good	20.573 \| good	0.395 \| good	7.722 \| good	0.332 \| good
2026-08-07T14:00:00.000Z	54 \| moderate	11.109 \| good	47.481 \| good	15.757 \| good	0.463 \| good	13.11 \| good	0.574 \| good
2026-08-07T15:00:00.000Z	54 \| moderate	11.318 \| good	60.471 \| fine	18.339 \| good	0.666 \| good	13.336 \| good	0.515 \| good
2026-08-07T16:00:00.000Z	64 \| moderate	13.424 \| fine	81.711 \| fine	22.906 \| good	0.718 \| good	12.773 \| good	0.509 \| good
2026-08-07T17:00:00.000Z	60 \| moderate	14.172 \| fine	49.16 \| good	27.373 \| good	0.658 \| good	12.707 \| good	0.403 \| good
2026-08-07T18:00:00.000Z	62 \| moderate	15.015 \| fine	57.212 \| fine	35.153 \| good	0.589 \| good	12.105 \| good	0.389 \| good
2026-08-07T19:00:00.000Z	60 \| moderate	14.341 \| fine	54.467 \| good	44.751 \| good	0.625 \| good	10.934 \| good	0.441 \| good
2026-08-07T20:00:00.000Z	62 \| moderate	14.676 \| fine	54.099 \| good	48.993 \| good	0.697 \| good	9.869 \| good	0.353 \| good
2026-08-07T21:00:00.000Z	60 \| moderate	14.186 \| fine	53.98 \| good	53.628 \| good	0.718 \| good	8.082 \| good	0.365 \| good
2026-08-07T22:00:00.000Z	64 \| moderate	13.589 \| fine	51.752 \| good	58.716 \| fine	0.631 \| good	6.104 \| good	0.306 \| good
2026-08-07T23:00:00.000Z	62 \| moderate	14.945 \| fine	60.68 \| fine	57.759 \| fine	0.597 \| good	6.24 \| good	0.353 \| good
2026-08-08T00:00:00.000Z	64 \| moderate	13.522 \| fine	60.612 \| fine	59.179 \| fine	0.818 \| good	7.17 \| good	0.412 \| good
2026-08-08T01:00:00.000Z	52 \| moderate	9.575 \| good	35.188 \| good	53.496 \| good	0.787 \| good	8.258 \| good	0.386 \| good
2026-08-08T02:00:00.000Z	52 \| moderate	9.608 \| good	36.603 \| good	48.961 \| good	0.527 \| good	9.491 \| good	0.386 \| good
2026-08-08T03:00:00.000Z	58 \| moderate	12.898 \| fine	57.073 \| fine	29.525 \| good	2.012 \| good	9.174 \| good	0.159 \| good
2026-08-08T04:00:00.000Z	49 \| good	8.656 \| good	34.777 \| good	37.04 \| good	0.567 \| good	10.114 \| good	0.412 \| good
2026-08-08T05:00:00.000Z	49 \| good	8.973 \| good	33.552 \| good	33.288 \| good	0.669 \| good	11.134 \| good	0.412 \| good
2026-08-08T06:00:00.000Z	54 \| moderate	10.925 \| good	43.469 \| good	30.908 \| good	0.455 \| good	10.621 \| good	0.421 \| good
2026-08-08T07:00:00.000Z	52 \| moderate	9.579 \| good	35.765 \| good	30.693 \| good	0.448 \| good	10.621 \| good	0.421 \| good
2026-08-08T08:00:00.000Z	54 \| moderate	10.927 \| good	38.626 \| good	22.209 \| good	0.428 \| good	10.882 \| good	0.456 \| good
2026-08-08T09:00:00.000Z	56 \| moderate	11.799 \| good	41.771 \| good	17.64 \| good	0.528 \| good	12.367 \| good	0.409 \| good
2026-08-08T10:00:00.000Z	56 \| moderate	12.42 \| fine	50.487 \| good	16.771 \| good	0.481 \| good	11.917 \| good	0.409 \| good
2026-08-08T11:00:00.000Z	56 \| moderate	11.694 \| good	43.806 \| good	14.284 \| good	0.58 \| good	12.517 \| good	0.361 \| good
2026-08-08T12:00:00.000Z	52 \| moderate	10.416 \| good	29.023 \| good	11.88 \| good	0.461 \| good	12.516 \| good	0.419 \| good
2026-08-08T13:00:00.000Z	52 \| moderate	10.19 \| good	31.757 \| good	12.144 \| good	0.462 \| good	12.516 \| good	0.419 \| good
2026-08-08T14:00:00.000Z	54 \| moderate	10.55 \| good	37.571 \| good	11.223 \| good	0.437 \| good	14.348 \| good	0.509 \| good
2026-08-08T15:00:00.000Z	54 \| moderate	11.266 \| good	36.962 \| good	16.081 \| good	0.739 \| good	13.295 \| good	0.485 \| good
2026-08-08T16:00:00.000Z	56 \| moderate	12.209 \| fine	47.214 \| good	22.201 \| good	0.739 \| good	11.258 \| good	0.465 \| good
2026-08-08T17:00:00.000Z	58 \| moderate	12.756 \| fine	42.964 \| good	28.3 \| good	0.984 \| good	11.49 \| good	0.5 \| good
2026-08-08T18:00:00.000Z	60 \| moderate	14.494 \| fine	45.741 \| good	36.78 \| good	1.001 \| good	12.384 \| good	0.5 \| good
2026-08-08T19:00:00.000Z	64 \| moderate	15.867 \| fine	57.264 \| fine	49.889 \| good	0.848 \| good	9.536 \| good	0.415 \| good
2026-08-08T20:00:00.000Z	77 \| moderate	12.614 \| fine	50.675 \| good	62.885 \| fine	0.808 \| good	7.635 \| good	0.412 \| good
2026-08-08T21:00:00.000Z	108 \| sensitive	12.592 \| fine	54.366 \| good	72.546 \| moderate	0.799 \| good	7.545 \| good	0.401 \| good
2026-08-08T22:00:00.000Z	100 \| moderate	12.405 \| fine	54.275 \| good	70.159 \| fine	0.959 \| good	6.883 \| good	0.348 \| good
2026-08-08T23:00:00.000Z	80 \| moderate	11.821 \| good	52.066 \| good	63.534 \| fine	0.983 \| good	5.778 \| good	0.333 \| good
2026-08-09T00:00:00.000Z	61 \| moderate	10.833 \| good	39.701 \| good	58.401 \| fine	0.974 \| good	5.556 \| good	0.333 \| good
2026-08-09T01:00:00.000Z	47 \| good	8.274 \| good	30.052 \| good	50.604 \| good	0.759 \| good	5.772 \| good	0.35 \| good
2026-08-09T01:00:00.000Z	54 \| moderate	9.629 \| good	36.122 \| good	56.406 \| fine	0.756 \| good	5.81 \| good	0.312 \| good
2026-08-08T23:00:00.000Z	151 \| unhealthy	15.111 \| fine	67.245 \| fine	85.663 \| moderate	1.789 \| good	2.374 \| good	0.137 \| good
2026-08-09T00:00:00.000Z	115 \| sensitive	16.09 \| fine	71.613 \| fine	75.262 \| moderate	1.774 \| good	2.402 \| good	0.136 \| good
2026-08-09T01:00:00.000Z	74 \| moderate	12.72 \| fine	57.364 \| fine	61.737 \| fine	1.738 \| good	2.843 \| good	0.135 \| good
2026-08-09T02:00:00.000Z	56 \| moderate	11.817 \| good	52.645 \| good	45.365 \| good	1.702 \| good	3.958 \| good	0.136 \| good
2026-08-09T03:00:00.000Z	60 \| moderate	14.079 \| fine	63.229 \| fine	41.741 \| good	1.656 \| good	5.826 \| good	0.139 \| good
2026-08-09T04:00:00.000Z	60 \| moderate	14.185 \| fine	63.407 \| fine	29.455 \| good	1.615 \| good	7.38 \| good	0.142 \| good
2026-08-09T05:00:00.000Z	58 \| moderate	12.712 \| fine	56.675 \| fine	23.352 \| good	1.554 \| good	9.192 \| good	0.147 \| good
2026-08-09T06:00:00.000Z	58 \| moderate	13.029 \| fine	58.766 \| fine	22.159 \| good	1.497 \| good	11.36 \| good	0.152 \| good
2026-08-09T07:00:00.000Z	56 \| moderate	11.518 \| good	50.869 \| good	22.516 \| good	1.429 \| good	13.268 \| good	0.159 \| good
2026-08-09T08:00:00.000Z	52 \| moderate	10.401 \| good	46.163 \| good	21.018 \| good	1.349 \| good	14.013 \| good	0.164 \| good
2026-08-09T09:00:00.000Z	54 \| moderate	11.35 \| good	50.069 \| good	18.457 \| good	1.306 \| good	14.919 \| good	0.169 \| good
2026-08-09T10:00:00.000Z	56 \| moderate	11.58 \| good	51.413 \| good	14.242 \| good	1.277 \| good	16.256 \| good	0.175 \| good
2026-08-09T11:00:00.000Z	58 \| moderate	12.788 \| fine	57.661 \| fine	13.396 \| good	1.261 \| good	17.733 \| good	0.181 \| good
2026-08-09T12:00:00.000Z	54 \| moderate	11.391 \| good	50.437 \| good	14.077 \| good	1.257 \| good	19.39 \| good	0.189 \| good
2026-08-09T13:00:00.000Z	58 \| moderate	12.611 \| fine	56.266 \| fine	14.31 \| good	1.258 \| good	20.898 \| good	0.199 \| good
2026-08-09T14:00:00.000Z	58 \| moderate	12.607 \| fine	56.18 \| fine	17.561 \| good	1.269 \| good	18.544 \| good	0.212 \| good
2026-08-09T15:00:00.000Z	66 \| moderate	17.373 \| fine	77.45 \| fine	25.366 \| good	1.466 \| good	12.158 \| good	0.172 \| good
2026-08-09T16:00:00.000Z	75 \| moderate	22.184 \| fine	97.523 \| fine	35.542 \| good	1.522 \| good	8.129 \| good	0.145 \| good
2026-08-09T17:00:00.000Z	81 \| moderate	24.771 \| fine	107.706 \| fine	51.355 \| good	1.514 \| good	6.64 \| good	0.141 \| good
2026-08-09T18:00:00.000Z	93 \| moderate	18.557 \| fine	81.826 \| fine	67.563 \| fine	1.461 \| good	5.604 \| good	0.139 \| good
2026-08-09T19:00:00.000Z	129 \| sensitive	17.886 \| fine	79.521 \| fine	79.473 \| moderate	1.421 \| good	4.661 \| good	0.138 \| good
2026-08-09T20:00:00.000Z	147 \| sensitive	16.042 \| fine	71.574 \| fine	83.708 \| moderate	1.406 \| good	3.979 \| good	0.137 \| good
2026-08-09T21:00:00.000Z	154 \| unhealthy	17.158 \| fine	75.896 \| fine	86.501 \| poor	1.399 \| good	3.497 \| good	0.135 \| good
2026-08-09T22:00:00.000Z	154 \| unhealthy	13.575 \| fine	60.819 \| fine	87.419 \| poor	1.409 \| good	3.164 \| good	0.134 \| good
2026-08-09T23:00:00.000Z	151 \| unhealthy	17.595 \| fine	78.378 \| fine	86.099 \| poor	1.448 \| good	2.997 \| good	0.133 \| good
2026-08-10T00:00:00.000Z	122 \| sensitive	17.701 \| fine	78.88 \| fine	76.601 \| moderate	1.487 \| good	3.133 \| good	0.132 \| good
2026-08-10T01:00:00.000Z	67 \| moderate	13.985 \| fine	63.081 \| fine	59.689 \| fine	1.547 \| good	3.962 \| good	0.133 \| good
2026-08-10T02:00:00.000Z	44 \| good	7.981 \| good	35.284 \| good	38.129 \| good	1.595 \| good	5.419 \| good	0.134 \| good
2026-08-10T03:00:00.000Z	54 \| moderate	11.367 \| good	50.246 \| good	36.325 \| good	1.585 \| good	7.303 \| good	0.137 \| good
2026-08-10T04:00:00.000Z	58 \| moderate	12.877 \| fine	57.362 \| fine	29.792 \| good	1.59 \| good	8.333 \| good	0.137 \| good
2026-08-10T05:00:00.000Z	54 \| moderate	10.837 \| good	48.275 \| good	24.539 \| good	1.569 \| good	9.385 \| good	0.138 \| good
2026-08-10T06:00:00.000Z	54 \| moderate	11.217 \| good	49.981 \| good	23.851 \| good	1.539 \| good	10.557 \| good	0.141 \| good
2026-08-10T07:00:00.000Z	44 \| good	8.314 \| good	36.781 \| good	22.045 \| good	1.492 \| good	11.978 \| good	0.145 \| good
2026-08-10T08:00:00.000Z	49 \| good	9.029 \| good	39.411 \| good	20.329 \| good	1.434 \| good	12.541 \| good	0.147 \| good
2026-08-10T09:00:00.000Z	52 \| moderate	9.684 \| good	43.148 \| good	16.56 \| good	1.405 \| good	14.085 \| good	0.154 \| good
2026-08-10T10:00:00.000Z	56 \| moderate	11.671 \| good	51.311 \| good	13.759 \| good	1.406 \| good	16.334 \| good	0.163 \| good
2026-08-10T11:00:00.000Z	56 \| moderate	11.518 \| good	51.067 \| good	12.072 \| good	1.4 \| good	19.242 \| good	0.175 \| good
2026-08-10T12:00:00.000Z	52 \| moderate	10.19 \| good	44.948 \| good	11.156 \| good	1.393 \| good	20.537 \| good	0.185 \| good
2026-08-10T13:00:00.000Z	58 \| moderate	12.934 \| fine	58.535 \| fine	8.231 \| good	1.407 \| good	21.061 \| good	0.194 \| good
2026-08-10T14:00:00.000Z	58 \| moderate	13.311 \| fine	60.196 \| fine	11.159 \| good	1.441 \| good	18.445 \| good	0.207 \| good
2026-08-10T15:00:00.000Z	67 \| moderate	17.62 \| fine	77.89 \| fine	17.291 \| good	1.593 \| good	12.073 \| good	0.168 \| good
2026-08-10T16:00:00.000Z	71 \| moderate	20.115 \| fine	88.167 \| fine	26.043 \| good	1.596 \| good	8.625 \| good	0.152 \| good
2026-08-10T17:00:00.000Z	79 \| moderate	23.861 \| fine	104.348 \| fine	38.441 \| good	1.547 \| good	6.79 \| good	0.147 \| good
2026-08-10T18:00:00.000Z	66 \| moderate	17.105 \| fine	76.304 \| fine	51.433 \| good	1.471 \| good	5.41 \| good	0.142 \| good
2026-08-10T19:00:00.000Z	80 \| moderate	17.274 \| fine	76.35 \| fine	63.722 \| fine	1.379 \| good	4.343 \| good	0.138 \| good
2026-08-10T20:00:00.000Z	112 \| sensitive	17.312 \| fine	76.604 \| fine	73.955 \| moderate	1.314 \| good	3.678 \| good	0.135 \| good
2026-08-10T21:00:00.000Z	136 \| sensitive	17.662 \| fine	78.654 \| fine	81.442 \| moderate	1.268 \| good	3.32 \| good	0.132 \| good
2026-08-10T22:00:00.000Z	143 \| sensitive	14.163 \| fine	63.406 \| fine	82.94 \| moderate	1.236 \| good	3.121 \| good	0.129 \| good

Walnut

Get reliable air quality data to drive your business

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

0.32ppm

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 09:00:00 on 2026-08-08.

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 04:00:00 on 2026-08-08.

What is the AQI in Walnut, California right now?

As of now, the AQI in Walnut, California is 115, indicating Unhealthy for Sensitive Groups 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 12.91 μg/m³.

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

The PM₁₀ concentration in Walnut, California is 55.436 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 0.308 ppm.

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

Currently, Walnut, California has a sulfur dioxide (SO₂) concentration of 0.942 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 74.871 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 6.759 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-08-07T02:00:00.000Z	54 \| moderate	11.494 \| good	43.684 \| good	45.212 \| good	0.683 \| good	8.447 \| good	0.339 \| good
2026-08-07T03:00:00.000Z	54 \| moderate	10.927 \| good	48.043 \| good	28.249 \| good	1.872 \| good	10.112 \| good	0.144 \| good
2026-08-07T04:00:00.000Z	54 \| moderate	10.624 \| good	34.779 \| good	38.108 \| good	0.489 \| good	8.912 \| good	0.336 \| good
2026-08-07T05:00:00.000Z	54 \| moderate	10.68 \| good	37.912 \| good	37.429 \| good	0.575 \| good	8.08 \| good	0.357 \| good
2026-08-07T06:00:00.000Z	52 \| moderate	10.248 \| good	35.634 \| good	33.456 \| good	0.476 \| good	7.892 \| good	0.386 \| good
2026-08-07T07:00:00.000Z	52 \| moderate	10.487 \| good	36.24 \| good	33.016 \| good	0.46 \| good	7.892 \| good	0.386 \| good
2026-08-07T08:00:00.000Z	52 \| moderate	10.139 \| good	39.352 \| good	29.031 \| good	0.364 \| good	8.07 \| good	0.342 \| good
2026-08-07T09:00:00.000Z	52 \| moderate	10.3 \| good	37.132 \| good	26.521 \| good	0.431 \| good	7.448 \| good	0.353 \| good
2026-08-07T10:00:00.000Z	49 \| good	9.436 \| good	37.025 \| good	24.751 \| good	0.384 \| good	6.982 \| good	0.259 \| good
2026-08-07T11:00:00.000Z	49 \| good	9.264 \| good	30.268 \| good	22.506 \| good	0.558 \| good	7.417 \| good	0.306 \| good
2026-08-07T12:00:00.000Z	52 \| moderate	9.918 \| good	30.564 \| good	20.904 \| good	0.573 \| good	7.417 \| good	0.306 \| good
2026-08-07T13:00:00.000Z	49 \| good	9.006 \| good	30.366 \| good	20.573 \| good	0.395 \| good	7.722 \| good	0.332 \| good
2026-08-07T14:00:00.000Z	54 \| moderate	11.109 \| good	47.481 \| good	15.757 \| good	0.463 \| good	13.11 \| good	0.574 \| good
2026-08-07T15:00:00.000Z	54 \| moderate	11.318 \| good	60.471 \| fine	18.339 \| good	0.666 \| good	13.336 \| good	0.515 \| good
2026-08-07T16:00:00.000Z	64 \| moderate	13.424 \| fine	81.711 \| fine	22.906 \| good	0.718 \| good	12.773 \| good	0.509 \| good
2026-08-07T17:00:00.000Z	60 \| moderate	14.172 \| fine	49.16 \| good	27.373 \| good	0.658 \| good	12.707 \| good	0.403 \| good
2026-08-07T18:00:00.000Z	62 \| moderate	15.015 \| fine	57.212 \| fine	35.153 \| good	0.589 \| good	12.105 \| good	0.389 \| good
2026-08-07T19:00:00.000Z	60 \| moderate	14.341 \| fine	54.467 \| good	44.751 \| good	0.625 \| good	10.934 \| good	0.441 \| good
2026-08-07T20:00:00.000Z	62 \| moderate	14.676 \| fine	54.099 \| good	48.993 \| good	0.697 \| good	9.869 \| good	0.353 \| good
2026-08-07T21:00:00.000Z	60 \| moderate	14.186 \| fine	53.98 \| good	53.628 \| good	0.718 \| good	8.082 \| good	0.365 \| good
2026-08-07T22:00:00.000Z	64 \| moderate	13.589 \| fine	51.752 \| good	58.716 \| fine	0.631 \| good	6.104 \| good	0.306 \| good
2026-08-07T23:00:00.000Z	62 \| moderate	14.945 \| fine	60.68 \| fine	57.759 \| fine	0.597 \| good	6.24 \| good	0.353 \| good
2026-08-08T00:00:00.000Z	64 \| moderate	13.522 \| fine	60.612 \| fine	59.179 \| fine	0.818 \| good	7.17 \| good	0.412 \| good
2026-08-08T01:00:00.000Z	52 \| moderate	9.575 \| good	35.188 \| good	53.496 \| good	0.787 \| good	8.258 \| good	0.386 \| good
2026-08-08T02:00:00.000Z	52 \| moderate	9.608 \| good	36.603 \| good	48.961 \| good	0.527 \| good	9.491 \| good	0.386 \| good
2026-08-08T03:00:00.000Z	58 \| moderate	12.898 \| fine	57.073 \| fine	29.525 \| good	2.012 \| good	9.174 \| good	0.159 \| good
2026-08-08T04:00:00.000Z	49 \| good	8.656 \| good	34.777 \| good	37.04 \| good	0.567 \| good	10.114 \| good	0.412 \| good
2026-08-08T05:00:00.000Z	49 \| good	8.973 \| good	33.552 \| good	33.288 \| good	0.669 \| good	11.134 \| good	0.412 \| good
2026-08-08T06:00:00.000Z	54 \| moderate	10.925 \| good	43.469 \| good	30.908 \| good	0.455 \| good	10.621 \| good	0.421 \| good
2026-08-08T07:00:00.000Z	52 \| moderate	9.579 \| good	35.765 \| good	30.693 \| good	0.448 \| good	10.621 \| good	0.421 \| good
2026-08-08T08:00:00.000Z	54 \| moderate	10.927 \| good	38.626 \| good	22.209 \| good	0.428 \| good	10.882 \| good	0.456 \| good
2026-08-08T09:00:00.000Z	56 \| moderate	11.799 \| good	41.771 \| good	17.64 \| good	0.528 \| good	12.367 \| good	0.409 \| good
2026-08-08T10:00:00.000Z	56 \| moderate	12.42 \| fine	50.487 \| good	16.771 \| good	0.481 \| good	11.917 \| good	0.409 \| good
2026-08-08T11:00:00.000Z	56 \| moderate	11.694 \| good	43.806 \| good	14.284 \| good	0.58 \| good	12.517 \| good	0.361 \| good
2026-08-08T12:00:00.000Z	52 \| moderate	10.416 \| good	29.023 \| good	11.88 \| good	0.461 \| good	12.516 \| good	0.419 \| good
2026-08-08T13:00:00.000Z	52 \| moderate	10.19 \| good	31.757 \| good	12.144 \| good	0.462 \| good	12.516 \| good	0.419 \| good
2026-08-08T14:00:00.000Z	54 \| moderate	10.55 \| good	37.571 \| good	11.223 \| good	0.437 \| good	14.348 \| good	0.509 \| good
2026-08-08T15:00:00.000Z	54 \| moderate	11.266 \| good	36.962 \| good	16.081 \| good	0.739 \| good	13.295 \| good	0.485 \| good
2026-08-08T16:00:00.000Z	56 \| moderate	12.209 \| fine	47.214 \| good	22.201 \| good	0.739 \| good	11.258 \| good	0.465 \| good
2026-08-08T17:00:00.000Z	58 \| moderate	12.756 \| fine	42.964 \| good	28.3 \| good	0.984 \| good	11.49 \| good	0.5 \| good
2026-08-08T18:00:00.000Z	60 \| moderate	14.494 \| fine	45.741 \| good	36.78 \| good	1.001 \| good	12.384 \| good	0.5 \| good
2026-08-08T19:00:00.000Z	64 \| moderate	15.867 \| fine	57.264 \| fine	49.889 \| good	0.848 \| good	9.536 \| good	0.415 \| good
2026-08-08T20:00:00.000Z	77 \| moderate	12.614 \| fine	50.675 \| good	62.885 \| fine	0.808 \| good	7.635 \| good	0.412 \| good
2026-08-08T21:00:00.000Z	108 \| sensitive	12.592 \| fine	54.366 \| good	72.546 \| moderate	0.799 \| good	7.545 \| good	0.401 \| good
2026-08-08T22:00:00.000Z	100 \| moderate	12.405 \| fine	54.275 \| good	70.159 \| fine	0.959 \| good	6.883 \| good	0.348 \| good
2026-08-08T23:00:00.000Z	80 \| moderate	11.821 \| good	52.066 \| good	63.534 \| fine	0.983 \| good	5.778 \| good	0.333 \| good
2026-08-09T00:00:00.000Z	61 \| moderate	10.833 \| good	39.701 \| good	58.401 \| fine	0.974 \| good	5.556 \| good	0.333 \| good
2026-08-09T01:00:00.000Z	47 \| good	8.274 \| good	30.052 \| good	50.604 \| good	0.759 \| good	5.772 \| good	0.35 \| good
2026-08-09T01:00:00.000Z	54 \| moderate	9.629 \| good	36.122 \| good	56.406 \| fine	0.756 \| good	5.81 \| good	0.312 \| good
2026-08-08T23:00:00.000Z	151 \| unhealthy	15.111 \| fine	67.245 \| fine	85.663 \| moderate	1.789 \| good	2.374 \| good	0.137 \| good
2026-08-09T00:00:00.000Z	115 \| sensitive	16.09 \| fine	71.613 \| fine	75.262 \| moderate	1.774 \| good	2.402 \| good	0.136 \| good
2026-08-09T01:00:00.000Z	74 \| moderate	12.72 \| fine	57.364 \| fine	61.737 \| fine	1.738 \| good	2.843 \| good	0.135 \| good
2026-08-09T02:00:00.000Z	56 \| moderate	11.817 \| good	52.645 \| good	45.365 \| good	1.702 \| good	3.958 \| good	0.136 \| good
2026-08-09T03:00:00.000Z	60 \| moderate	14.079 \| fine	63.229 \| fine	41.741 \| good	1.656 \| good	5.826 \| good	0.139 \| good
2026-08-09T04:00:00.000Z	60 \| moderate	14.185 \| fine	63.407 \| fine	29.455 \| good	1.615 \| good	7.38 \| good	0.142 \| good
2026-08-09T05:00:00.000Z	58 \| moderate	12.712 \| fine	56.675 \| fine	23.352 \| good	1.554 \| good	9.192 \| good	0.147 \| good
2026-08-09T06:00:00.000Z	58 \| moderate	13.029 \| fine	58.766 \| fine	22.159 \| good	1.497 \| good	11.36 \| good	0.152 \| good
2026-08-09T07:00:00.000Z	56 \| moderate	11.518 \| good	50.869 \| good	22.516 \| good	1.429 \| good	13.268 \| good	0.159 \| good
2026-08-09T08:00:00.000Z	52 \| moderate	10.401 \| good	46.163 \| good	21.018 \| good	1.349 \| good	14.013 \| good	0.164 \| good
2026-08-09T09:00:00.000Z	54 \| moderate	11.35 \| good	50.069 \| good	18.457 \| good	1.306 \| good	14.919 \| good	0.169 \| good
2026-08-09T10:00:00.000Z	56 \| moderate	11.58 \| good	51.413 \| good	14.242 \| good	1.277 \| good	16.256 \| good	0.175 \| good
2026-08-09T11:00:00.000Z	58 \| moderate	12.788 \| fine	57.661 \| fine	13.396 \| good	1.261 \| good	17.733 \| good	0.181 \| good
2026-08-09T12:00:00.000Z	54 \| moderate	11.391 \| good	50.437 \| good	14.077 \| good	1.257 \| good	19.39 \| good	0.189 \| good
2026-08-09T13:00:00.000Z	58 \| moderate	12.611 \| fine	56.266 \| fine	14.31 \| good	1.258 \| good	20.898 \| good	0.199 \| good
2026-08-09T14:00:00.000Z	58 \| moderate	12.607 \| fine	56.18 \| fine	17.561 \| good	1.269 \| good	18.544 \| good	0.212 \| good
2026-08-09T15:00:00.000Z	66 \| moderate	17.373 \| fine	77.45 \| fine	25.366 \| good	1.466 \| good	12.158 \| good	0.172 \| good
2026-08-09T16:00:00.000Z	75 \| moderate	22.184 \| fine	97.523 \| fine	35.542 \| good	1.522 \| good	8.129 \| good	0.145 \| good
2026-08-09T17:00:00.000Z	81 \| moderate	24.771 \| fine	107.706 \| fine	51.355 \| good	1.514 \| good	6.64 \| good	0.141 \| good
2026-08-09T18:00:00.000Z	93 \| moderate	18.557 \| fine	81.826 \| fine	67.563 \| fine	1.461 \| good	5.604 \| good	0.139 \| good
2026-08-09T19:00:00.000Z	129 \| sensitive	17.886 \| fine	79.521 \| fine	79.473 \| moderate	1.421 \| good	4.661 \| good	0.138 \| good
2026-08-09T20:00:00.000Z	147 \| sensitive	16.042 \| fine	71.574 \| fine	83.708 \| moderate	1.406 \| good	3.979 \| good	0.137 \| good
2026-08-09T21:00:00.000Z	154 \| unhealthy	17.158 \| fine	75.896 \| fine	86.501 \| poor	1.399 \| good	3.497 \| good	0.135 \| good
2026-08-09T22:00:00.000Z	154 \| unhealthy	13.575 \| fine	60.819 \| fine	87.419 \| poor	1.409 \| good	3.164 \| good	0.134 \| good
2026-08-09T23:00:00.000Z	151 \| unhealthy	17.595 \| fine	78.378 \| fine	86.099 \| poor	1.448 \| good	2.997 \| good	0.133 \| good
2026-08-10T00:00:00.000Z	122 \| sensitive	17.701 \| fine	78.88 \| fine	76.601 \| moderate	1.487 \| good	3.133 \| good	0.132 \| good
2026-08-10T01:00:00.000Z	67 \| moderate	13.985 \| fine	63.081 \| fine	59.689 \| fine	1.547 \| good	3.962 \| good	0.133 \| good
2026-08-10T02:00:00.000Z	44 \| good	7.981 \| good	35.284 \| good	38.129 \| good	1.595 \| good	5.419 \| good	0.134 \| good
2026-08-10T03:00:00.000Z	54 \| moderate	11.367 \| good	50.246 \| good	36.325 \| good	1.585 \| good	7.303 \| good	0.137 \| good
2026-08-10T04:00:00.000Z	58 \| moderate	12.877 \| fine	57.362 \| fine	29.792 \| good	1.59 \| good	8.333 \| good	0.137 \| good
2026-08-10T05:00:00.000Z	54 \| moderate	10.837 \| good	48.275 \| good	24.539 \| good	1.569 \| good	9.385 \| good	0.138 \| good
2026-08-10T06:00:00.000Z	54 \| moderate	11.217 \| good	49.981 \| good	23.851 \| good	1.539 \| good	10.557 \| good	0.141 \| good
2026-08-10T07:00:00.000Z	44 \| good	8.314 \| good	36.781 \| good	22.045 \| good	1.492 \| good	11.978 \| good	0.145 \| good
2026-08-10T08:00:00.000Z	49 \| good	9.029 \| good	39.411 \| good	20.329 \| good	1.434 \| good	12.541 \| good	0.147 \| good
2026-08-10T09:00:00.000Z	52 \| moderate	9.684 \| good	43.148 \| good	16.56 \| good	1.405 \| good	14.085 \| good	0.154 \| good
2026-08-10T10:00:00.000Z	56 \| moderate	11.671 \| good	51.311 \| good	13.759 \| good	1.406 \| good	16.334 \| good	0.163 \| good
2026-08-10T11:00:00.000Z	56 \| moderate	11.518 \| good	51.067 \| good	12.072 \| good	1.4 \| good	19.242 \| good	0.175 \| good
2026-08-10T12:00:00.000Z	52 \| moderate	10.19 \| good	44.948 \| good	11.156 \| good	1.393 \| good	20.537 \| good	0.185 \| good
2026-08-10T13:00:00.000Z	58 \| moderate	12.934 \| fine	58.535 \| fine	8.231 \| good	1.407 \| good	21.061 \| good	0.194 \| good
2026-08-10T14:00:00.000Z	58 \| moderate	13.311 \| fine	60.196 \| fine	11.159 \| good	1.441 \| good	18.445 \| good	0.207 \| good
2026-08-10T15:00:00.000Z	67 \| moderate	17.62 \| fine	77.89 \| fine	17.291 \| good	1.593 \| good	12.073 \| good	0.168 \| good
2026-08-10T16:00:00.000Z	71 \| moderate	20.115 \| fine	88.167 \| fine	26.043 \| good	1.596 \| good	8.625 \| good	0.152 \| good
2026-08-10T17:00:00.000Z	79 \| moderate	23.861 \| fine	104.348 \| fine	38.441 \| good	1.547 \| good	6.79 \| good	0.147 \| good
2026-08-10T18:00:00.000Z	66 \| moderate	17.105 \| fine	76.304 \| fine	51.433 \| good	1.471 \| good	5.41 \| good	0.142 \| good
2026-08-10T19:00:00.000Z	80 \| moderate	17.274 \| fine	76.35 \| fine	63.722 \| fine	1.379 \| good	4.343 \| good	0.138 \| good
2026-08-10T20:00:00.000Z	112 \| sensitive	17.312 \| fine	76.604 \| fine	73.955 \| moderate	1.314 \| good	3.678 \| good	0.135 \| good
2026-08-10T21:00:00.000Z	136 \| sensitive	17.662 \| fine	78.654 \| fine	81.442 \| moderate	1.268 \| good	3.32 \| good	0.132 \| good
2026-08-10T22:00:00.000Z	143 \| sensitive	14.163 \| fine	63.406 \| fine	82.94 \| moderate	1.236 \| good	3.121 \| good	0.129 \| good

Live air quality index in Walnut, California today

Major air pollutants in Walnut, California

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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

Air quality in nearby cities

South San Jose Hills, California

Diamond Bar, California

Rowland Heights, California

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