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

The PM10 concentration in Walnut, California is 67.024 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 1.017 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 64.599 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 6.455 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 14.85 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)

14.85 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

67.02 μg/m³

155

255

425

605+

Ozone (O₃)

64.60 ppb

201

201+

Sulfur Dioxide (SO₂)

1.02 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

6.46 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.28 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
2026-07-22T00:00:00.000Z	54 \| moderate	10.996 \| good	60.1 \| fine	53.637 \| good	0.563 \| good	10.081 \| good	0.181 \| good
2026-07-22T01:00:00.000Z	49 \| good	8.817 \| good	33.985 \| good	43.4 \| good	0.57 \| good	10.33 \| good	0.209 \| good
2026-07-22T02:00:00.000Z	52 \| moderate	9.642 \| good	42.261 \| good	32.228 \| good	0.553 \| good	9.073 \| good	0.181 \| good
2026-07-22T03:00:00.000Z	38 \| good	6.572 \| good	24.342 \| good	31.034 \| good	0.476 \| good	8.62 \| good	0.209 \| good
2026-07-22T04:00:00.000Z	38 \| good	7.205 \| good	36.094 \| good	27.821 \| good	0.46 \| good	10.17 \| good	0.238 \| good
2026-07-22T05:00:00.000Z	33 \| good	5.828 \| good	23.282 \| good	23.118 \| good	0.625 \| good	10.017 \| good	0.277 \| good
2026-07-22T06:00:00.000Z	27 \| good	5.064 \| good	26.741 \| good	21.188 \| good	0.506 \| good	9.962 \| good	0.294 \| good
2026-07-22T07:00:00.000Z	33 \| good	5.936 \| good	25.007 \| good	24.409 \| good	0.507 \| good	10.407 \| good	0.294 \| good
2026-07-22T08:00:00.000Z	33 \| good	5.951 \| good	21.347 \| good	16.239 \| good	0.489 \| good	12.044 \| good	0.279 \| good
2026-07-22T09:00:00.000Z	44 \| good	7.697 \| good	41.851 \| good	9.211 \| good	0.508 \| good	13.523 \| good	0.223 \| good
2026-07-22T10:00:00.000Z	27 \| good	4.524 \| good	20.573 \| good	13.237 \| good	0.458 \| good	15.204 \| good	0.223 \| good
2026-07-22T11:00:00.000Z	33 \| good	6.075 \| good	27.127 \| good	12.9 \| good	0.594 \| good	14.849 \| good	0.195 \| good
2026-07-22T12:00:00.000Z	22 \| good	4.201 \| good	20.384 \| good	13.245 \| good	0.491 \| good	16.834 \| good	0.24 \| good
2026-07-22T13:00:00.000Z	44 \| good	7.802 \| good	23.67 \| good	11.028 \| good	0.491 \| good	16.111 \| good	0.24 \| good
2026-07-22T14:00:00.000Z	33 \| good	6.236 \| good	19.737 \| good	13.233 \| good	0.506 \| good	19.563 \| good	0.388 \| good
2026-07-22T15:00:00.000Z	49 \| good	9.166 \| good	40.337 \| good	15.533 \| good	0.703 \| good	15.548 \| good	0.343 \| good
2026-07-22T16:00:00.000Z	45 \| good	8.34 \| good	48.752 \| good	16.397 \| good	0.739 \| good	12.727 \| good	0.294 \| good
2026-07-22T17:00:00.000Z	49 \| good	9.129 \| good	38.354 \| good	19.638 \| good	0.716 \| good	12.887 \| good	0.266 \| good
2026-07-22T18:00:00.000Z	49 \| good	8.634 \| good	20.47 \| good	22.592 \| good	0.689 \| good	11.984 \| good	0.266 \| good
2026-07-22T19:00:00.000Z	49 \| good	9.406 \| good	30.735 \| good	29.283 \| good	0.677 \| good	11.939 \| good	0.288 \| good
2026-07-22T20:00:00.000Z	52 \| moderate	10.032 \| good	43.262 \| good	38.769 \| good	0.77 \| good	12.019 \| good	0.288 \| good
2026-07-22T21:00:00.000Z	54 \| moderate	10.507 \| good	52.752 \| good	47.269 \| good	0.75 \| good	10.83 \| good	0.266 \| good
2026-07-22T22:00:00.000Z	51 \| moderate	9.312 \| good	54.965 \| good	50.673 \| good	0.709 \| good	11.933 \| good	0.251 \| good
2026-07-22T23:00:00.000Z	64 \| moderate	9.738 \| good	38.241 \| good	58.776 \| fine	0.563 \| good	10.683 \| good	0.279 \| good
2026-07-23T00:00:00.000Z	71 \| moderate	9.926 \| good	41.33 \| good	61.023 \| fine	0.635 \| good	9.565 \| good	0.251 \| good
2026-07-23T01:00:00.000Z	43 \| good	7.324 \| good	26.086 \| good	46.234 \| good	0.71 \| good	7.977 \| good	0.251 \| good
2026-07-23T02:00:00.000Z	44 \| good	8.105 \| good	28.449 \| good	36.509 \| good	0.726 \| good	7.837 \| good	0.279 \| good
2026-07-23T03:00:00.000Z	49 \| good	8.728 \| good	38.626 \| good	27.946 \| good	1.193 \| good	5.827 \| good	0.113 \| good
2026-07-23T04:00:00.000Z	49 \| good	8.849 \| good	36.705 \| good	27.941 \| good	0.638 \| good	10.63 \| good	0.279 \| good
2026-07-23T05:00:00.000Z	44 \| good	7.977 \| good	35.648 \| good	22.682 \| good	0.758 \| good	9.996 \| good	0.279 \| good
2026-07-23T06:00:00.000Z	49 \| good	8.571 \| good	29.337 \| good	23.727 \| good	0.61 \| good	8.926 \| good	0.308 \| good
2026-07-23T07:00:00.000Z	33 \| good	6.228 \| good	30.052 \| good	23.736 \| good	0.594 \| good	8.186 \| good	0.308 \| good
2026-07-23T08:00:00.000Z	38 \| good	6.815 \| good	27.763 \| good	16.575 \| good	0.566 \| good	11.259 \| good	0.294 \| good
2026-07-23T09:00:00.000Z	38 \| good	6.732 \| good	29.062 \| good	12.198 \| good	0.634 \| good	12.214 \| good	0.237 \| good
2026-07-23T10:00:00.000Z	33 \| good	5.772 \| good	25.771 \| good	12.243 \| good	0.586 \| good	12.789 \| good	0.255 \| good
2026-07-23T11:00:00.000Z	49 \| good	8.535 \| good	47.401 \| good	10.575 \| good	0.771 \| good	15.421 \| good	0.237 \| good
2026-07-23T12:00:00.000Z	49 \| good	9.185 \| good	50.135 \| good	10.506 \| good	0.593 \| good	14.867 \| good	0.277 \| good
2026-07-23T13:00:00.000Z	44 \| good	8.181 \| good	21.397 \| good	9.192 \| good	0.596 \| good	18.974 \| good	0.277 \| good
2026-07-23T14:00:00.000Z	49 \| good	9.043 \| good	26.274 \| good	12.526 \| good	0.688 \| good	15.829 \| good	0.433 \| good
2026-07-23T15:00:00.000Z	49 \| good	9.176 \| good	39.762 \| good	15.97 \| good	0.883 \| good	15.366 \| good	0.459 \| good
2026-07-23T16:00:00.000Z	56 \| moderate	12.441 \| fine	39.331 \| good	18.451 \| good	0.917 \| good	14.895 \| good	0.415 \| good
2026-07-23T17:00:00.000Z	56 \| moderate	11.605 \| good	49.752 \| good	27.202 \| good	0.823 \| good	12.252 \| good	0.348 \| good
2026-07-23T18:00:00.000Z	96 \| moderate	13.598 \| fine	144.846 \| fine	44.614 \| good	0.868 \| good	19.662 \| good	0.352 \| good
2026-07-23T19:00:00.000Z	63 \| moderate	12.778 \| fine	79.108 \| fine	50.81 \| good	0.79 \| good	11.986 \| good	0.325 \| good
2026-07-23T20:00:00.000Z	97 \| moderate	13.995 \| fine	94.19 \| fine	68.563 \| fine	0.767 \| good	10.609 \| good	0.308 \| good
2026-07-23T21:00:00.000Z	101 \| sensitive	15.146 \| fine	81.666 \| fine	71.081 \| moderate	0.83 \| good	11.402 \| good	0.288 \| good
2026-07-23T22:00:00.000Z	108 \| sensitive	14.64 \| fine	53.974 \| good	72.613 \| moderate	0.99 \| good	10.493 \| good	0.29 \| good
2026-07-23T23:00:00.000Z	115 \| sensitive	14.327 \| fine	62.834 \| fine	74.516 \| moderate	1.01 \| good	8.185 \| good	0.294 \| good
2026-07-23T23:00:00.000Z	84 \| moderate	14.85 \| fine	67.024 \| fine	64.599 \| fine	1.017 \| good	6.455 \| good	0.277 \| good
2026-07-24T00:00:00.000Z	90 \| moderate	14.715 \| fine	66.067 \| fine	67.432 \| fine	1.35 \| good	3.652 \| good	0.127 \| good
2026-07-24T01:00:00.000Z	56 \| moderate	12.494 \| fine	56.163 \| fine	53.794 \| good	1.388 \| good	4.26 \| good	0.128 \| good
2026-07-24T02:00:00.000Z	58 \| moderate	12.979 \| fine	58.391 \| fine	42.745 \| good	1.429 \| good	5.694 \| good	0.131 \| good
2026-07-24T03:00:00.000Z	56 \| moderate	12.043 \| good	54.085 \| good	33.348 \| good	1.442 \| good	7.824 \| good	0.133 \| good
2026-07-24T04:00:00.000Z	56 \| moderate	12.105 \| fine	54.191 \| good	26.701 \| good	1.447 \| good	9.427 \| good	0.135 \| good
2026-07-24T05:00:00.000Z	60 \| moderate	13.721 \| fine	62.161 \| fine	22.283 \| good	1.424 \| good	10.677 \| good	0.137 \| good
2026-07-24T06:00:00.000Z	60 \| moderate	13.844 \| fine	62.317 \| fine	19.663 \| good	1.387 \| good	12.254 \| good	0.14 \| good
2026-07-24T07:00:00.000Z	58 \| moderate	13.168 \| fine	58.841 \| fine	19.354 \| good	1.326 \| good	13.95 \| good	0.146 \| good
2026-07-24T08:00:00.000Z	60 \| moderate	14.063 \| fine	62.555 \| fine	16.844 \| good	1.241 \| good	14.229 \| good	0.148 \| good
2026-07-24T09:00:00.000Z	60 \| moderate	13.999 \| fine	62.727 \| fine	15.021 \| good	1.183 \| good	14.692 \| good	0.15 \| good
2026-07-24T10:00:00.000Z	62 \| moderate	14.617 \| fine	64.737 \| fine	10.14 \| good	1.165 \| good	15.682 \| good	0.155 \| good
2026-07-24T11:00:00.000Z	60 \| moderate	13.765 \| fine	62.132 \| fine	9.487 \| good	1.174 \| good	16.89 \| good	0.16 \| good
2026-07-24T12:00:00.000Z	60 \| moderate	14.48 \| fine	64.4 \| fine	8.171 \| good	1.178 \| good	17.789 \| good	0.165 \| good
2026-07-24T13:00:00.000Z	62 \| moderate	15.435 \| fine	68.283 \| fine	7.701 \| good	1.184 \| good	18.144 \| good	0.17 \| good
2026-07-24T14:00:00.000Z	66 \| moderate	17.358 \| fine	77.441 \| fine	11.589 \| good	1.169 \| good	15.684 \| good	0.176 \| good
2026-07-24T15:00:00.000Z	69 \| moderate	19.466 \| fine	85.767 \| fine	18.232 \| good	1.132 \| good	9.813 \| good	0.145 \| good
2026-07-24T16:00:00.000Z	73 \| moderate	21.475 \| fine	94.242 \| fine	29.851 \| good	1.082 \| good	7.654 \| good	0.137 \| good
2026-07-24T17:00:00.000Z	81 \| moderate	24.879 \| fine	108.238 \| fine	47.801 \| good	1.101 \| good	6.537 \| good	0.135 \| good
2026-07-24T18:00:00.000Z	97 \| moderate	25.675 \| fine	111.701 \| fine	69.406 \| fine	1.12 \| good	5.642 \| good	0.133 \| good
2026-07-24T19:00:00.000Z	133 \| sensitive	22.388 \| fine	97.849 \| fine	79.808 \| moderate	1.119 \| good	4.684 \| good	0.131 \| good
2026-07-24T20:00:00.000Z	119 \| sensitive	16.355 \| fine	72.191 \| fine	76.183 \| moderate	1.103 \| good	3.906 \| good	0.127 \| good
2026-07-24T21:00:00.000Z	101 \| sensitive	11.637 \| good	51.584 \| good	70.878 \| fine	1.099 \| good	3.448 \| good	0.123 \| good
2026-07-24T22:00:00.000Z	90 \| moderate	12.148 \| fine	54.822 \| good	67.151 \| fine	1.111 \| good	3.17 \| good	0.121 \| good
2026-07-24T23:00:00.000Z	77 \| moderate	10.897 \| good	48.034 \| good	62.664 \| fine	1.123 \| good	3.044 \| good	0.118 \| good
2026-07-25T00:00:00.000Z	58 \| moderate	11.156 \| good	49.014 \| good	57.416 \| fine	1.134 \| good	3.198 \| good	0.117 \| good
2026-07-25T01:00:00.000Z	54 \| moderate	11.487 \| good	50.915 \| good	48.793 \| good	1.153 \| good	3.675 \| good	0.116 \| good
2026-07-25T02:00:00.000Z	52 \| moderate	10.484 \| good	46.689 \| good	39.278 \| good	1.171 \| good	4.793 \| good	0.116 \| good
2026-07-25T03:00:00.000Z	56 \| moderate	11.687 \| good	51.319 \| good	31.001 \| good	1.197 \| good	6.575 \| good	0.118 \| good
2026-07-25T04:00:00.000Z	54 \| moderate	10.829 \| good	47.814 \| good	25.437 \| good	1.216 \| good	8.007 \| good	0.12 \| good
2026-07-25T05:00:00.000Z	56 \| moderate	11.663 \| good	51.159 \| good	21.434 \| good	1.218 \| good	9.213 \| good	0.122 \| good
2026-07-25T06:00:00.000Z	54 \| moderate	11.143 \| good	49.554 \| good	19.569 \| good	1.209 \| good	10.813 \| good	0.126 \| good
2026-07-25T07:00:00.000Z	54 \| moderate	10.727 \| good	47.315 \| good	18.404 \| good	1.179 \| good	12.386 \| good	0.131 \| good
2026-07-25T08:00:00.000Z	56 \| moderate	11.925 \| good	53.492 \| good	15.225 \| good	1.14 \| good	13.405 \| good	0.137 \| good
2026-07-25T09:00:00.000Z	56 \| moderate	11.758 \| good	51.853 \| good	12.789 \| good	1.129 \| good	14.853 \| good	0.142 \| good
2026-07-25T10:00:00.000Z	56 \| moderate	11.575 \| good	51.304 \| good	10.982 \| good	1.144 \| good	16.147 \| good	0.148 \| good
2026-07-25T11:00:00.000Z	52 \| moderate	10.175 \| good	44.789 \| good	11.216 \| good	1.15 \| good	17.492 \| good	0.154 \| good
2026-07-25T12:00:00.000Z	54 \| moderate	10.751 \| good	47.464 \| good	9.151 \| good	1.146 \| good	19.622 \| good	0.162 \| good
2026-07-25T13:00:00.000Z	56 \| moderate	11.525 \| good	50.644 \| good	8.48 \| good	1.149 \| good	20.691 \| good	0.172 \| good
2026-07-25T14:00:00.000Z	62 \| moderate	14.857 \| fine	66.193 \| fine	10.705 \| good	1.167 \| good	17.802 \| good	0.181 \| good
2026-07-25T15:00:00.000Z	64 \| moderate	16.329 \| fine	72.262 \| fine	16.485 \| good	1.228 \| good	11.336 \| good	0.147 \| good
2026-07-25T16:00:00.000Z	66 \| moderate	17.488 \| fine	77.78 \| fine	27.645 \| good	1.251 \| good	8.71 \| good	0.135 \| good
2026-07-25T17:00:00.000Z	71 \| moderate	20.057 \| fine	88.071 \| fine	42.385 \| good	1.276 \| good	7.431 \| good	0.132 \| good
2026-07-25T18:00:00.000Z	71 \| moderate	20.011 \| fine	88.569 \| fine	54.903 \| good	1.267 \| good	6.273 \| good	0.129 \| good
2026-07-25T19:00:00.000Z	84 \| moderate	16.313 \| fine	72.315 \| fine	65.013 \| fine	1.246 \| good	5.1 \| good	0.127 \| good
2026-07-25T20:00:00.000Z	101 \| sensitive	15.961 \| fine	70.444 \| fine	71.404 \| moderate	1.222 \| good	4.223 \| good	0.124 \| good
2026-07-25T21:00:00.000Z	129 \| sensitive	14.587 \| fine	64.712 \| fine	79.105 \| moderate	1.23 \| good	3.676 \| good	0.121 \| good
2026-07-25T22:00:00.000Z	119 \| sensitive	14.465 \| fine	65.115 \| fine	76.48 \| moderate	1.266 \| good	3.279 \| good	0.119 \| good
2026-07-25T23:00:00.000Z	119 \| sensitive	11.766 \| good	52.275 \| good	75.659 \| moderate	1.313 \| good	3.036 \| good	0.118 \| good

Walnut

Get reliable air quality data to drive your business

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

0.27ppm

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 10:00:00 on 2026-07-23.

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 10:00:00 on 2026-07-23.

What is the AQI in Walnut, California right now?

As of now, the AQI in Walnut, California is 84, indicating Moderate 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 14.85 μg/m³.

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

The PM₁₀ concentration in Walnut, California is 67.024 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 0.277 ppm.

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

Currently, Walnut, California has a sulfur dioxide (SO₂) concentration of 1.017 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 64.599 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 6.455 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-22T00:00:00.000Z	54 \| moderate	10.996 \| good	60.1 \| fine	53.637 \| good	0.563 \| good	10.081 \| good	0.181 \| good
2026-07-22T01:00:00.000Z	49 \| good	8.817 \| good	33.985 \| good	43.4 \| good	0.57 \| good	10.33 \| good	0.209 \| good
2026-07-22T02:00:00.000Z	52 \| moderate	9.642 \| good	42.261 \| good	32.228 \| good	0.553 \| good	9.073 \| good	0.181 \| good
2026-07-22T03:00:00.000Z	38 \| good	6.572 \| good	24.342 \| good	31.034 \| good	0.476 \| good	8.62 \| good	0.209 \| good
2026-07-22T04:00:00.000Z	38 \| good	7.205 \| good	36.094 \| good	27.821 \| good	0.46 \| good	10.17 \| good	0.238 \| good
2026-07-22T05:00:00.000Z	33 \| good	5.828 \| good	23.282 \| good	23.118 \| good	0.625 \| good	10.017 \| good	0.277 \| good
2026-07-22T06:00:00.000Z	27 \| good	5.064 \| good	26.741 \| good	21.188 \| good	0.506 \| good	9.962 \| good	0.294 \| good
2026-07-22T07:00:00.000Z	33 \| good	5.936 \| good	25.007 \| good	24.409 \| good	0.507 \| good	10.407 \| good	0.294 \| good
2026-07-22T08:00:00.000Z	33 \| good	5.951 \| good	21.347 \| good	16.239 \| good	0.489 \| good	12.044 \| good	0.279 \| good
2026-07-22T09:00:00.000Z	44 \| good	7.697 \| good	41.851 \| good	9.211 \| good	0.508 \| good	13.523 \| good	0.223 \| good
2026-07-22T10:00:00.000Z	27 \| good	4.524 \| good	20.573 \| good	13.237 \| good	0.458 \| good	15.204 \| good	0.223 \| good
2026-07-22T11:00:00.000Z	33 \| good	6.075 \| good	27.127 \| good	12.9 \| good	0.594 \| good	14.849 \| good	0.195 \| good
2026-07-22T12:00:00.000Z	22 \| good	4.201 \| good	20.384 \| good	13.245 \| good	0.491 \| good	16.834 \| good	0.24 \| good
2026-07-22T13:00:00.000Z	44 \| good	7.802 \| good	23.67 \| good	11.028 \| good	0.491 \| good	16.111 \| good	0.24 \| good
2026-07-22T14:00:00.000Z	33 \| good	6.236 \| good	19.737 \| good	13.233 \| good	0.506 \| good	19.563 \| good	0.388 \| good
2026-07-22T15:00:00.000Z	49 \| good	9.166 \| good	40.337 \| good	15.533 \| good	0.703 \| good	15.548 \| good	0.343 \| good
2026-07-22T16:00:00.000Z	45 \| good	8.34 \| good	48.752 \| good	16.397 \| good	0.739 \| good	12.727 \| good	0.294 \| good
2026-07-22T17:00:00.000Z	49 \| good	9.129 \| good	38.354 \| good	19.638 \| good	0.716 \| good	12.887 \| good	0.266 \| good
2026-07-22T18:00:00.000Z	49 \| good	8.634 \| good	20.47 \| good	22.592 \| good	0.689 \| good	11.984 \| good	0.266 \| good
2026-07-22T19:00:00.000Z	49 \| good	9.406 \| good	30.735 \| good	29.283 \| good	0.677 \| good	11.939 \| good	0.288 \| good
2026-07-22T20:00:00.000Z	52 \| moderate	10.032 \| good	43.262 \| good	38.769 \| good	0.77 \| good	12.019 \| good	0.288 \| good
2026-07-22T21:00:00.000Z	54 \| moderate	10.507 \| good	52.752 \| good	47.269 \| good	0.75 \| good	10.83 \| good	0.266 \| good
2026-07-22T22:00:00.000Z	51 \| moderate	9.312 \| good	54.965 \| good	50.673 \| good	0.709 \| good	11.933 \| good	0.251 \| good
2026-07-22T23:00:00.000Z	64 \| moderate	9.738 \| good	38.241 \| good	58.776 \| fine	0.563 \| good	10.683 \| good	0.279 \| good
2026-07-23T00:00:00.000Z	71 \| moderate	9.926 \| good	41.33 \| good	61.023 \| fine	0.635 \| good	9.565 \| good	0.251 \| good
2026-07-23T01:00:00.000Z	43 \| good	7.324 \| good	26.086 \| good	46.234 \| good	0.71 \| good	7.977 \| good	0.251 \| good
2026-07-23T02:00:00.000Z	44 \| good	8.105 \| good	28.449 \| good	36.509 \| good	0.726 \| good	7.837 \| good	0.279 \| good
2026-07-23T03:00:00.000Z	49 \| good	8.728 \| good	38.626 \| good	27.946 \| good	1.193 \| good	5.827 \| good	0.113 \| good
2026-07-23T04:00:00.000Z	49 \| good	8.849 \| good	36.705 \| good	27.941 \| good	0.638 \| good	10.63 \| good	0.279 \| good
2026-07-23T05:00:00.000Z	44 \| good	7.977 \| good	35.648 \| good	22.682 \| good	0.758 \| good	9.996 \| good	0.279 \| good
2026-07-23T06:00:00.000Z	49 \| good	8.571 \| good	29.337 \| good	23.727 \| good	0.61 \| good	8.926 \| good	0.308 \| good
2026-07-23T07:00:00.000Z	33 \| good	6.228 \| good	30.052 \| good	23.736 \| good	0.594 \| good	8.186 \| good	0.308 \| good
2026-07-23T08:00:00.000Z	38 \| good	6.815 \| good	27.763 \| good	16.575 \| good	0.566 \| good	11.259 \| good	0.294 \| good
2026-07-23T09:00:00.000Z	38 \| good	6.732 \| good	29.062 \| good	12.198 \| good	0.634 \| good	12.214 \| good	0.237 \| good
2026-07-23T10:00:00.000Z	33 \| good	5.772 \| good	25.771 \| good	12.243 \| good	0.586 \| good	12.789 \| good	0.255 \| good
2026-07-23T11:00:00.000Z	49 \| good	8.535 \| good	47.401 \| good	10.575 \| good	0.771 \| good	15.421 \| good	0.237 \| good
2026-07-23T12:00:00.000Z	49 \| good	9.185 \| good	50.135 \| good	10.506 \| good	0.593 \| good	14.867 \| good	0.277 \| good
2026-07-23T13:00:00.000Z	44 \| good	8.181 \| good	21.397 \| good	9.192 \| good	0.596 \| good	18.974 \| good	0.277 \| good
2026-07-23T14:00:00.000Z	49 \| good	9.043 \| good	26.274 \| good	12.526 \| good	0.688 \| good	15.829 \| good	0.433 \| good
2026-07-23T15:00:00.000Z	49 \| good	9.176 \| good	39.762 \| good	15.97 \| good	0.883 \| good	15.366 \| good	0.459 \| good
2026-07-23T16:00:00.000Z	56 \| moderate	12.441 \| fine	39.331 \| good	18.451 \| good	0.917 \| good	14.895 \| good	0.415 \| good
2026-07-23T17:00:00.000Z	56 \| moderate	11.605 \| good	49.752 \| good	27.202 \| good	0.823 \| good	12.252 \| good	0.348 \| good
2026-07-23T18:00:00.000Z	96 \| moderate	13.598 \| fine	144.846 \| fine	44.614 \| good	0.868 \| good	19.662 \| good	0.352 \| good
2026-07-23T19:00:00.000Z	63 \| moderate	12.778 \| fine	79.108 \| fine	50.81 \| good	0.79 \| good	11.986 \| good	0.325 \| good
2026-07-23T20:00:00.000Z	97 \| moderate	13.995 \| fine	94.19 \| fine	68.563 \| fine	0.767 \| good	10.609 \| good	0.308 \| good
2026-07-23T21:00:00.000Z	101 \| sensitive	15.146 \| fine	81.666 \| fine	71.081 \| moderate	0.83 \| good	11.402 \| good	0.288 \| good
2026-07-23T22:00:00.000Z	108 \| sensitive	14.64 \| fine	53.974 \| good	72.613 \| moderate	0.99 \| good	10.493 \| good	0.29 \| good
2026-07-23T23:00:00.000Z	115 \| sensitive	14.327 \| fine	62.834 \| fine	74.516 \| moderate	1.01 \| good	8.185 \| good	0.294 \| good
2026-07-23T23:00:00.000Z	84 \| moderate	14.85 \| fine	67.024 \| fine	64.599 \| fine	1.017 \| good	6.455 \| good	0.277 \| good
2026-07-24T00:00:00.000Z	90 \| moderate	14.715 \| fine	66.067 \| fine	67.432 \| fine	1.35 \| good	3.652 \| good	0.127 \| good
2026-07-24T01:00:00.000Z	56 \| moderate	12.494 \| fine	56.163 \| fine	53.794 \| good	1.388 \| good	4.26 \| good	0.128 \| good
2026-07-24T02:00:00.000Z	58 \| moderate	12.979 \| fine	58.391 \| fine	42.745 \| good	1.429 \| good	5.694 \| good	0.131 \| good
2026-07-24T03:00:00.000Z	56 \| moderate	12.043 \| good	54.085 \| good	33.348 \| good	1.442 \| good	7.824 \| good	0.133 \| good
2026-07-24T04:00:00.000Z	56 \| moderate	12.105 \| fine	54.191 \| good	26.701 \| good	1.447 \| good	9.427 \| good	0.135 \| good
2026-07-24T05:00:00.000Z	60 \| moderate	13.721 \| fine	62.161 \| fine	22.283 \| good	1.424 \| good	10.677 \| good	0.137 \| good
2026-07-24T06:00:00.000Z	60 \| moderate	13.844 \| fine	62.317 \| fine	19.663 \| good	1.387 \| good	12.254 \| good	0.14 \| good
2026-07-24T07:00:00.000Z	58 \| moderate	13.168 \| fine	58.841 \| fine	19.354 \| good	1.326 \| good	13.95 \| good	0.146 \| good
2026-07-24T08:00:00.000Z	60 \| moderate	14.063 \| fine	62.555 \| fine	16.844 \| good	1.241 \| good	14.229 \| good	0.148 \| good
2026-07-24T09:00:00.000Z	60 \| moderate	13.999 \| fine	62.727 \| fine	15.021 \| good	1.183 \| good	14.692 \| good	0.15 \| good
2026-07-24T10:00:00.000Z	62 \| moderate	14.617 \| fine	64.737 \| fine	10.14 \| good	1.165 \| good	15.682 \| good	0.155 \| good
2026-07-24T11:00:00.000Z	60 \| moderate	13.765 \| fine	62.132 \| fine	9.487 \| good	1.174 \| good	16.89 \| good	0.16 \| good
2026-07-24T12:00:00.000Z	60 \| moderate	14.48 \| fine	64.4 \| fine	8.171 \| good	1.178 \| good	17.789 \| good	0.165 \| good
2026-07-24T13:00:00.000Z	62 \| moderate	15.435 \| fine	68.283 \| fine	7.701 \| good	1.184 \| good	18.144 \| good	0.17 \| good
2026-07-24T14:00:00.000Z	66 \| moderate	17.358 \| fine	77.441 \| fine	11.589 \| good	1.169 \| good	15.684 \| good	0.176 \| good
2026-07-24T15:00:00.000Z	69 \| moderate	19.466 \| fine	85.767 \| fine	18.232 \| good	1.132 \| good	9.813 \| good	0.145 \| good
2026-07-24T16:00:00.000Z	73 \| moderate	21.475 \| fine	94.242 \| fine	29.851 \| good	1.082 \| good	7.654 \| good	0.137 \| good
2026-07-24T17:00:00.000Z	81 \| moderate	24.879 \| fine	108.238 \| fine	47.801 \| good	1.101 \| good	6.537 \| good	0.135 \| good
2026-07-24T18:00:00.000Z	97 \| moderate	25.675 \| fine	111.701 \| fine	69.406 \| fine	1.12 \| good	5.642 \| good	0.133 \| good
2026-07-24T19:00:00.000Z	133 \| sensitive	22.388 \| fine	97.849 \| fine	79.808 \| moderate	1.119 \| good	4.684 \| good	0.131 \| good
2026-07-24T20:00:00.000Z	119 \| sensitive	16.355 \| fine	72.191 \| fine	76.183 \| moderate	1.103 \| good	3.906 \| good	0.127 \| good
2026-07-24T21:00:00.000Z	101 \| sensitive	11.637 \| good	51.584 \| good	70.878 \| fine	1.099 \| good	3.448 \| good	0.123 \| good
2026-07-24T22:00:00.000Z	90 \| moderate	12.148 \| fine	54.822 \| good	67.151 \| fine	1.111 \| good	3.17 \| good	0.121 \| good
2026-07-24T23:00:00.000Z	77 \| moderate	10.897 \| good	48.034 \| good	62.664 \| fine	1.123 \| good	3.044 \| good	0.118 \| good
2026-07-25T00:00:00.000Z	58 \| moderate	11.156 \| good	49.014 \| good	57.416 \| fine	1.134 \| good	3.198 \| good	0.117 \| good
2026-07-25T01:00:00.000Z	54 \| moderate	11.487 \| good	50.915 \| good	48.793 \| good	1.153 \| good	3.675 \| good	0.116 \| good
2026-07-25T02:00:00.000Z	52 \| moderate	10.484 \| good	46.689 \| good	39.278 \| good	1.171 \| good	4.793 \| good	0.116 \| good
2026-07-25T03:00:00.000Z	56 \| moderate	11.687 \| good	51.319 \| good	31.001 \| good	1.197 \| good	6.575 \| good	0.118 \| good
2026-07-25T04:00:00.000Z	54 \| moderate	10.829 \| good	47.814 \| good	25.437 \| good	1.216 \| good	8.007 \| good	0.12 \| good
2026-07-25T05:00:00.000Z	56 \| moderate	11.663 \| good	51.159 \| good	21.434 \| good	1.218 \| good	9.213 \| good	0.122 \| good
2026-07-25T06:00:00.000Z	54 \| moderate	11.143 \| good	49.554 \| good	19.569 \| good	1.209 \| good	10.813 \| good	0.126 \| good
2026-07-25T07:00:00.000Z	54 \| moderate	10.727 \| good	47.315 \| good	18.404 \| good	1.179 \| good	12.386 \| good	0.131 \| good
2026-07-25T08:00:00.000Z	56 \| moderate	11.925 \| good	53.492 \| good	15.225 \| good	1.14 \| good	13.405 \| good	0.137 \| good
2026-07-25T09:00:00.000Z	56 \| moderate	11.758 \| good	51.853 \| good	12.789 \| good	1.129 \| good	14.853 \| good	0.142 \| good
2026-07-25T10:00:00.000Z	56 \| moderate	11.575 \| good	51.304 \| good	10.982 \| good	1.144 \| good	16.147 \| good	0.148 \| good
2026-07-25T11:00:00.000Z	52 \| moderate	10.175 \| good	44.789 \| good	11.216 \| good	1.15 \| good	17.492 \| good	0.154 \| good
2026-07-25T12:00:00.000Z	54 \| moderate	10.751 \| good	47.464 \| good	9.151 \| good	1.146 \| good	19.622 \| good	0.162 \| good
2026-07-25T13:00:00.000Z	56 \| moderate	11.525 \| good	50.644 \| good	8.48 \| good	1.149 \| good	20.691 \| good	0.172 \| good
2026-07-25T14:00:00.000Z	62 \| moderate	14.857 \| fine	66.193 \| fine	10.705 \| good	1.167 \| good	17.802 \| good	0.181 \| good
2026-07-25T15:00:00.000Z	64 \| moderate	16.329 \| fine	72.262 \| fine	16.485 \| good	1.228 \| good	11.336 \| good	0.147 \| good
2026-07-25T16:00:00.000Z	66 \| moderate	17.488 \| fine	77.78 \| fine	27.645 \| good	1.251 \| good	8.71 \| good	0.135 \| good
2026-07-25T17:00:00.000Z	71 \| moderate	20.057 \| fine	88.071 \| fine	42.385 \| good	1.276 \| good	7.431 \| good	0.132 \| good
2026-07-25T18:00:00.000Z	71 \| moderate	20.011 \| fine	88.569 \| fine	54.903 \| good	1.267 \| good	6.273 \| good	0.129 \| good
2026-07-25T19:00:00.000Z	84 \| moderate	16.313 \| fine	72.315 \| fine	65.013 \| fine	1.246 \| good	5.1 \| good	0.127 \| good
2026-07-25T20:00:00.000Z	101 \| sensitive	15.961 \| fine	70.444 \| fine	71.404 \| moderate	1.222 \| good	4.223 \| good	0.124 \| good
2026-07-25T21:00:00.000Z	129 \| sensitive	14.587 \| fine	64.712 \| fine	79.105 \| moderate	1.23 \| good	3.676 \| good	0.121 \| good
2026-07-25T22:00:00.000Z	119 \| sensitive	14.465 \| fine	65.115 \| fine	76.48 \| moderate	1.266 \| good	3.279 \| good	0.119 \| good
2026-07-25T23:00:00.000Z	119 \| sensitive	11.766 \| good	52.275 \| good	75.659 \| moderate	1.313 \| good	3.036 \| good	0.118 \| 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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