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

The PM10 concentration in Walnut, California is 46.248 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 0.452 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 5.737 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 18.948 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 22.267 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)

21.71 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

64.49 μg/m³

155

255

425

605+

Ozone (O₃)

2.87 ppb

201

201+

Sulfur Dioxide (SO₂)

0.27 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

16.08 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.66 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
2026-01-21T15:00:00.000Z	88 \| moderate	29.193 \| fine	110.311 \| fine	12.708 \| good	0.539 \| good	23.102 \| good	0.583 \| good
2026-01-21T16:00:00.000Z	84 \| moderate	27.447 \| fine	100.698 \| fine	7.685 \| good	0.617 \| good	20.24 \| good	0.717 \| good
2026-01-21T17:00:00.000Z	86 \| moderate	28.142 \| fine	97.088 \| fine	9.645 \| good	0.497 \| good	20.109 \| good	0.692 \| good
2026-01-21T18:00:00.000Z	88 \| moderate	29.341 \| fine	111.251 \| fine	10.673 \| good	0.447 \| good	20.347 \| good	0.703 \| good
2026-01-21T19:00:00.000Z	84 \| moderate	27.332 \| fine	109.031 \| fine	11.571 \| good	0.506 \| good	26.382 \| good	0.749 \| good
2026-01-21T20:00:00.000Z	90 \| moderate	29.804 \| fine	111.461 \| fine	14.823 \| good	0.519 \| good	26.563 \| good	0.652 \| good
2026-01-21T21:00:00.000Z	94 \| moderate	32.023 \| fine	119.521 \| fine	14.958 \| good	0.455 \| good	29.419 \| good	0.682 \| good
2026-01-21T22:00:00.000Z	84 \| moderate	27.113 \| fine	93.753 \| fine	16.099 \| good	0.588 \| good	28.773 \| good	0.674 \| good
2026-01-21T23:00:00.000Z	88 \| moderate	28.641 \| fine	101.718 \| fine	16.281 \| good	0.476 \| good	29.523 \| good	0.574 \| good
2026-01-22T00:00:00.000Z	88 \| moderate	29.062 \| fine	93.003 \| fine	14.603 \| good	0.464 \| good	30.009 \| good	0.574 \| good
2026-01-22T01:00:00.000Z	92 \| moderate	30.644 \| fine	89.057 \| fine	13.603 \| good	0.372 \| good	30.416 \| good	0.611 \| good
2026-01-22T02:00:00.000Z	94 \| moderate	31.668 \| fine	89.35 \| fine	13.464 \| good	0.335 \| good	31.968 \| good	0.653 \| good
2026-01-22T03:00:00.000Z	99 \| moderate	34.632 \| fine	93.588 \| fine	11.685 \| good	0.429 \| good	30.843 \| good	0.701 \| good
2026-01-22T04:00:00.000Z	97 \| moderate	33.984 \| fine	97.725 \| fine	10.136 \| good	0.491 \| good	31.858 \| good	0.687 \| good
2026-01-22T05:00:00.000Z	99 \| moderate	34.71 \| fine	94.247 \| fine	8.895 \| good	0.757 \| good	32.127 \| good	0.716 \| good
2026-01-22T06:00:00.000Z	102 \| sensitive	35.825 \| moderate	93.545 \| fine	7.362 \| good	0.575 \| good	34.083 \| good	0.784 \| good
2026-01-22T07:00:00.000Z	102 \| sensitive	36.086 \| moderate	97.494 \| fine	7.362 \| good	0.611 \| good	30.367 \| good	0.886 \| good
2026-01-22T08:00:00.000Z	94 \| moderate	32.479 \| fine	86.062 \| fine	8.906 \| good	0.637 \| good	30.345 \| good	0.823 \| good
2026-01-22T09:00:00.000Z	107 \| sensitive	38.443 \| moderate	106.346 \| fine	6.131 \| good	0.616 \| good	28.473 \| good	0.754 \| good
2026-01-22T10:00:00.000Z	97 \| moderate	33.992 \| fine	103.954 \| fine	5.626 \| good	0.597 \| good	30.098 \| good	0.692 \| good
2026-01-22T11:00:00.000Z	99 \| moderate	35.004 \| fine	106.386 \| fine	4.342 \| good	0.515 \| good	29.656 \| good	0.55 \| good
2026-01-22T12:00:00.000Z	122 \| sensitive	43.88 \| moderate	152.624 \| fine	3.161 \| good	0.658 \| good	28.223 \| good	0.573 \| good
2026-01-22T13:00:00.000Z	107 \| sensitive	38.302 \| moderate	110.07 \| fine	2.483 \| good	0.656 \| good	28.223 \| good	0.574 \| good
2026-01-22T14:00:00.000Z	102 \| sensitive	35.924 \| moderate	106.018 \| fine	3.272 \| good	0.47 \| good	25.048 \| good	0.71 \| good
2026-01-22T15:00:00.000Z	97 \| moderate	34.175 \| fine	108.641 \| fine	3.861 \| good	0.56 \| good	25.979 \| good	0.786 \| good
2026-01-22T16:00:00.000Z	97 \| moderate	34.375 \| fine	104.691 \| fine	5.319 \| good	0.661 \| good	25.911 \| good	0.8 \| good
2026-01-22T17:00:00.000Z	112 \| sensitive	39.718 \| moderate	111.837 \| fine	7.029 \| good	0.741 \| good	26.755 \| good	0.745 \| good
2026-01-22T18:00:00.000Z	137 \| sensitive	50.139 \| moderate	167.857 \| moderate	9.274 \| good	0.491 \| good	24.914 \| good	0.652 \| good
2026-01-22T19:00:00.000Z	122 \| sensitive	44.015 \| moderate	109.59 \| fine	11.854 \| good	0.419 \| good	27.962 \| good	0.698 \| good
2026-01-22T20:00:00.000Z	105 \| sensitive	36.717 \| moderate	103.332 \| fine	12.93 \| good	0.378 \| good	27.708 \| good	0.555 \| good
2026-01-22T21:00:00.000Z	97 \| moderate	33.721 \| fine	102.666 \| fine	13.887 \| good	0.467 \| good	24.735 \| good	0.532 \| good
2026-01-22T22:00:00.000Z	110 \| sensitive	38.638 \| moderate	114.764 \| fine	14.868 \| good	0.602 \| good	22.865 \| good	0.512 \| good
2026-01-22T23:00:00.000Z	102 \| sensitive	36.156 \| moderate	87.837 \| fine	12.745 \| good	0.548 \| good	26.573 \| good	0.543 \| good
2026-01-23T00:00:00.000Z	88 \| moderate	29.233 \| fine	74.227 \| fine	10.644 \| good	0.331 \| good	27.608 \| good	0.575 \| good
2026-01-23T01:00:00.000Z	86 \| moderate	28.297 \| fine	64.148 \| fine	10.552 \| good	0.349 \| good	27.92 \| good	0.492 \| good
2026-01-23T02:00:00.000Z	77 \| moderate	22.756 \| fine	60.706 \| fine	12.307 \| good	0.358 \| good	22.152 \| good	0.512 \| good
2026-01-23T03:00:00.000Z	77 \| moderate	23.224 \| fine	61.099 \| fine	9.809 \| good	0.262 \| good	24.44 \| good	0.498 \| good
2026-01-23T04:00:00.000Z	79 \| moderate	23.731 \| fine	62.011 \| fine	9.097 \| good	0.338 \| good	22.536 \| good	0.449 \| good
2026-01-23T05:00:00.000Z	71 \| moderate	20.015 \| fine	49.928 \| good	7.295 \| good	0.554 \| good	23.753 \| good	0.574 \| good
2026-01-23T06:00:00.000Z	75 \| moderate	22.333 \| fine	53.628 \| good	10.623 \| good	0.375 \| good	24.774 \| good	0.576 \| good
2026-01-23T07:00:00.000Z	73 \| moderate	21.048 \| fine	55.2 \| fine	12.335 \| good	0.367 \| good	24.774 \| good	0.574 \| good
2026-01-23T08:00:00.000Z	90 \| moderate	30.189 \| fine	89.203 \| fine	7.327 \| good	0.614 \| good	20.91 \| good	0.613 \| good
2026-01-23T09:00:00.000Z	71 \| moderate	19.862 \| fine	54.366 \| good	6.778 \| good	0.424 \| good	17.883 \| good	0.671 \| good
2026-01-23T10:00:00.000Z	69 \| moderate	18.557 \| fine	43.226 \| good	2.898 \| good	0.486 \| good	18.018 \| good	0.672 \| good
2026-01-23T11:00:00.000Z	67 \| moderate	17.954 \| fine	42.614 \| good	3.924 \| good	0.348 \| good	20.06 \| good	0.585 \| good
2026-01-23T12:00:00.000Z	75 \| moderate	22.267 \| fine	46.248 \| good	5.737 \| good	0.452 \| good	18.948 \| good	0.532 \| good
2026-01-23T13:00:00.000Z	71 \| moderate	19.867 \| fine	48.546 \| good	5.445 \| good	0.452 \| good	18.948 \| good	0.532 \| good
2026-01-23T14:00:00.000Z	75 \| moderate	21.71 \| fine	64.49 \| fine	2.871 \| good	0.267 \| good	16.077 \| good	0.656 \| good
2026-01-23T14:00:00.000Z	75 \| moderate	21.71 \| fine	64.49 \| fine	2.871 \| good	0.267 \| good	16.077 \| good	0.656 \| good
2026-01-23T14:00:00.000Z	73 \| moderate	21.19 \| fine	92.959 \| fine	1.352 \| good	3.296 \| good	28.654 \| good	0.517 \| good
2026-01-23T15:00:00.000Z	77 \| moderate	23.126 \| fine	101.059 \| fine	1.508 \| good	3.154 \| good	28.12 \| good	0.523 \| good
2026-01-23T16:00:00.000Z	75 \| moderate	22.278 \| fine	97.04 \| fine	4.961 \| good	4.57 \| good	27.554 \| good	0.466 \| good
2026-01-23T17:00:00.000Z	71 \| moderate	20.355 \| fine	88.857 \| fine	13.64 \| good	5.986 \| good	26.988 \| good	0.409 \| good
2026-01-23T18:00:00.000Z	66 \| moderate	17.295 \| fine	76.789 \| fine	20.113 \| good	7.402 \| good	26.422 \| good	0.353 \| good
2026-01-23T19:00:00.000Z	56 \| moderate	12.3 \| fine	54.759 \| good	27.909 \| good	8.079 \| good	26.392 \| good	0.325 \| good
2026-01-23T20:00:00.000Z	49 \| good	9.074 \| good	40.805 \| good	31.733 \| good	8.756 \| good	26.361 \| good	0.297 \| good
2026-01-23T21:00:00.000Z	52 \| moderate	9.513 \| good	42.933 \| good	31.134 \| good	9.433 \| good	26.33 \| good	0.269 \| good
2026-01-23T22:00:00.000Z	52 \| moderate	10.182 \| good	45.065 \| good	29.167 \| good	9.643 \| good	27.466 \| good	0.263 \| good
2026-01-23T23:00:00.000Z	44 \| good	7.743 \| good	34.336 \| good	29.912 \| good	9.853 \| good	28.602 \| good	0.257 \| good
2026-01-24T00:00:00.000Z	30 \| good	1.733 \| good	7.226 \| good	31.504 \| good	10.063 \| good	29.738 \| good	0.252 \| good
2026-01-24T01:00:00.000Z	33 \| good	3.243 \| good	14.198 \| good	28.593 \| good	10.085 \| good	34.606 \| good	0.292 \| good
2026-01-24T02:00:00.000Z	38 \| good	6.827 \| good	30.161 \| good	23.548 \| good	10.107 \| good	39.474 \| good	0.333 \| good
2026-01-24T03:00:00.000Z	56 \| moderate	12.328 \| fine	55.14 \| fine	17.807 \| good	10.129 \| good	44.342 \| good	0.373 \| good
2026-01-24T04:00:00.000Z	66 \| moderate	16.537 \| fine	73.19 \| fine	12.715 \| good	10.449 \| good	43.923 \| good	0.385 \| good
2026-01-24T05:00:00.000Z	73 \| moderate	20.635 \| fine	90.955 \| fine	9.23 \| good	10.77 \| good	43.504 \| good	0.396 \| good
2026-01-24T06:00:00.000Z	77 \| moderate	23.052 \| fine	100.732 \| fine	7.882 \| good	11.09 \| good	43.085 \| good	0.407 \| good
2026-01-24T07:00:00.000Z	75 \| moderate	21.876 \| fine	96.634 \| fine	7.654 \| good	10.874 \| good	40.687 \| good	0.373 \| good
2026-01-24T08:00:00.000Z	79 \| moderate	23.648 \| fine	102.791 \| fine	7.951 \| good	10.657 \| good	38.29 \| good	0.338 \| good
2026-01-24T09:00:00.000Z	82 \| moderate	25.671 \| fine	112.56 \| fine	7.082 \| good	10.441 \| good	35.893 \| good	0.304 \| good
2026-01-24T10:00:00.000Z	81 \| moderate	24.804 \| fine	108.623 \| fine	6.228 \| good	10.469 \| good	34.816 \| good	0.297 \| good
2026-01-24T11:00:00.000Z	79 \| moderate	24.031 \| fine	104.702 \| fine	6.252 \| good	10.497 \| good	33.739 \| good	0.29 \| good
2026-01-24T12:00:00.000Z	82 \| moderate	25.567 \| fine	110.805 \| fine	5.206 \| good	10.525 \| good	32.662 \| good	0.283 \| good
2026-01-24T13:00:00.000Z	84 \| moderate	27.142 \| fine	118.591 \| fine	5.382 \| good	10.613 \| good	31.769 \| good	0.298 \| good
2026-01-24T14:00:00.000Z	77 \| moderate	23.324 \| fine	102.641 \| fine	5.984 \| good	10.701 \| good	30.876 \| good	0.314 \| good
2026-01-24T15:00:00.000Z	84 \| moderate	26.939 \| fine	116.848 \| fine	6 \| good	10.789 \| good	29.983 \| good	0.329 \| good
2026-01-24T16:00:00.000Z	71 \| moderate	20.439 \| fine	90.637 \| fine	13.973 \| good	10.085 \| good	26.098 \| good	0.299 \| good
2026-01-24T17:00:00.000Z	69 \| moderate	18.932 \| fine	82.915 \| fine	25.39 \| good	9.382 \| good	22.212 \| good	0.27 \| good
2026-01-24T18:00:00.000Z	58 \| moderate	12.98 \| fine	58.812 \| fine	29.499 \| good	8.678 \| good	18.327 \| good	0.24 \| good
2026-01-24T19:00:00.000Z	54 \| moderate	11.056 \| good	48.94 \| good	33.379 \| good	7.961 \| good	16.375 \| good	0.225 \| good
2026-01-24T20:00:00.000Z	49 \| good	9.139 \| good	40.993 \| good	35.001 \| good	7.245 \| good	14.423 \| good	0.21 \| good
2026-01-24T21:00:00.000Z	38 \| good	6.829 \| good	30.084 \| good	36.427 \| good	6.528 \| good	12.471 \| good	0.196 \| good
2026-01-24T22:00:00.000Z	34 \| good	6.381 \| good	28.119 \| good	37.47 \| good	6.407 \| good	12.902 \| good	0.195 \| good
2026-01-24T23:00:00.000Z	38 \| good	6.546 \| good	29.11 \| good	37.467 \| good	6.285 \| good	13.334 \| good	0.195 \| good
2026-01-25T00:00:00.000Z	36 \| good	3.683 \| good	16.073 \| good	39.413 \| good	6.164 \| good	13.766 \| good	0.195 \| good
2026-01-25T01:00:00.000Z	33 \| good	4.842 \| good	21.075 \| good	35.849 \| good	5.924 \| good	20.004 \| good	0.225 \| good
2026-01-25T02:00:00.000Z	33 \| good	5.555 \| good	23.987 \| good	31.748 \| good	5.684 \| good	26.242 \| good	0.256 \| good
2026-01-25T03:00:00.000Z	44 \| good	7.835 \| good	34.109 \| good	28.685 \| good	5.444 \| good	32.48 \| good	0.287 \| good
2026-01-25T04:00:00.000Z	52 \| moderate	9.548 \| good	42.96 \| good	21.451 \| good	5.674 \| good	31.737 \| good	0.321 \| good
2026-01-25T05:00:00.000Z	52 \| moderate	10.28 \| good	45.059 \| good	17.029 \| good	5.905 \| good	30.994 \| good	0.355 \| good
2026-01-25T06:00:00.000Z	99 \| moderate	35.329 \| fine	36.027 \| good	10.269 \| good	6.052 \| good	30.068 \| good	0.385 \| good
2026-01-25T07:00:00.000Z	54 \| moderate	11.43 \| good	50.944 \| good	7.425 \| good	5.215 \| good	28.396 \| good	0.355 \| good
2026-01-25T08:00:00.000Z	56 \| moderate	12.486 \| fine	56.834 \| fine	10.368 \| good	4.295 \| good	26.542 \| good	0.323 \| good
2026-01-25T09:00:00.000Z	64 \| moderate	15.532 \| fine	68.96 \| fine	9.845 \| good	3.376 \| good	24.688 \| good	0.29 \| good
2026-01-25T10:00:00.000Z	66 \| moderate	17.497 \| fine	77.096 \| fine	8.512 \| good	2.819 \| good	23.959 \| good	0.26 \| good
2026-01-25T11:00:00.000Z	66 \| moderate	17.158 \| fine	76.827 \| fine	8.195 \| good	2.263 \| good	23.229 \| good	0.23 \| good
2026-01-25T12:00:00.000Z	52 \| moderate	10.244 \| good	10.382 \| good	10.763 \| good	1.698 \| good	22.371 \| good	0.2 \| good
2026-01-25T13:00:00.000Z	44 \| good	8.027 \| good	8.174 \| good	11.059 \| good	1.689 \| good	22.621 \| 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

0.52ppm

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 06:00:00 on 2026-01-22.

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 05:00:00 on 2026-01-23.

What is the AQI in Walnut, California right now?

As of now, the AQI in Walnut, California is 75, 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 22.267 μg/m³.

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

The PM₁₀ concentration in Walnut, California is 46.248 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 0.532 ppm.

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

Currently, Walnut, California has a sulfur dioxide (SO₂) concentration of 0.452 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 5.737 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 18.948 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-01-21T15:00:00.000Z	88 \| moderate	29.193 \| fine	110.311 \| fine	12.708 \| good	0.539 \| good	23.102 \| good	0.583 \| good
2026-01-21T16:00:00.000Z	84 \| moderate	27.447 \| fine	100.698 \| fine	7.685 \| good	0.617 \| good	20.24 \| good	0.717 \| good
2026-01-21T17:00:00.000Z	86 \| moderate	28.142 \| fine	97.088 \| fine	9.645 \| good	0.497 \| good	20.109 \| good	0.692 \| good
2026-01-21T18:00:00.000Z	88 \| moderate	29.341 \| fine	111.251 \| fine	10.673 \| good	0.447 \| good	20.347 \| good	0.703 \| good
2026-01-21T19:00:00.000Z	84 \| moderate	27.332 \| fine	109.031 \| fine	11.571 \| good	0.506 \| good	26.382 \| good	0.749 \| good
2026-01-21T20:00:00.000Z	90 \| moderate	29.804 \| fine	111.461 \| fine	14.823 \| good	0.519 \| good	26.563 \| good	0.652 \| good
2026-01-21T21:00:00.000Z	94 \| moderate	32.023 \| fine	119.521 \| fine	14.958 \| good	0.455 \| good	29.419 \| good	0.682 \| good
2026-01-21T22:00:00.000Z	84 \| moderate	27.113 \| fine	93.753 \| fine	16.099 \| good	0.588 \| good	28.773 \| good	0.674 \| good
2026-01-21T23:00:00.000Z	88 \| moderate	28.641 \| fine	101.718 \| fine	16.281 \| good	0.476 \| good	29.523 \| good	0.574 \| good
2026-01-22T00:00:00.000Z	88 \| moderate	29.062 \| fine	93.003 \| fine	14.603 \| good	0.464 \| good	30.009 \| good	0.574 \| good
2026-01-22T01:00:00.000Z	92 \| moderate	30.644 \| fine	89.057 \| fine	13.603 \| good	0.372 \| good	30.416 \| good	0.611 \| good
2026-01-22T02:00:00.000Z	94 \| moderate	31.668 \| fine	89.35 \| fine	13.464 \| good	0.335 \| good	31.968 \| good	0.653 \| good
2026-01-22T03:00:00.000Z	99 \| moderate	34.632 \| fine	93.588 \| fine	11.685 \| good	0.429 \| good	30.843 \| good	0.701 \| good
2026-01-22T04:00:00.000Z	97 \| moderate	33.984 \| fine	97.725 \| fine	10.136 \| good	0.491 \| good	31.858 \| good	0.687 \| good
2026-01-22T05:00:00.000Z	99 \| moderate	34.71 \| fine	94.247 \| fine	8.895 \| good	0.757 \| good	32.127 \| good	0.716 \| good
2026-01-22T06:00:00.000Z	102 \| sensitive	35.825 \| moderate	93.545 \| fine	7.362 \| good	0.575 \| good	34.083 \| good	0.784 \| good
2026-01-22T07:00:00.000Z	102 \| sensitive	36.086 \| moderate	97.494 \| fine	7.362 \| good	0.611 \| good	30.367 \| good	0.886 \| good
2026-01-22T08:00:00.000Z	94 \| moderate	32.479 \| fine	86.062 \| fine	8.906 \| good	0.637 \| good	30.345 \| good	0.823 \| good
2026-01-22T09:00:00.000Z	107 \| sensitive	38.443 \| moderate	106.346 \| fine	6.131 \| good	0.616 \| good	28.473 \| good	0.754 \| good
2026-01-22T10:00:00.000Z	97 \| moderate	33.992 \| fine	103.954 \| fine	5.626 \| good	0.597 \| good	30.098 \| good	0.692 \| good
2026-01-22T11:00:00.000Z	99 \| moderate	35.004 \| fine	106.386 \| fine	4.342 \| good	0.515 \| good	29.656 \| good	0.55 \| good
2026-01-22T12:00:00.000Z	122 \| sensitive	43.88 \| moderate	152.624 \| fine	3.161 \| good	0.658 \| good	28.223 \| good	0.573 \| good
2026-01-22T13:00:00.000Z	107 \| sensitive	38.302 \| moderate	110.07 \| fine	2.483 \| good	0.656 \| good	28.223 \| good	0.574 \| good
2026-01-22T14:00:00.000Z	102 \| sensitive	35.924 \| moderate	106.018 \| fine	3.272 \| good	0.47 \| good	25.048 \| good	0.71 \| good
2026-01-22T15:00:00.000Z	97 \| moderate	34.175 \| fine	108.641 \| fine	3.861 \| good	0.56 \| good	25.979 \| good	0.786 \| good
2026-01-22T16:00:00.000Z	97 \| moderate	34.375 \| fine	104.691 \| fine	5.319 \| good	0.661 \| good	25.911 \| good	0.8 \| good
2026-01-22T17:00:00.000Z	112 \| sensitive	39.718 \| moderate	111.837 \| fine	7.029 \| good	0.741 \| good	26.755 \| good	0.745 \| good
2026-01-22T18:00:00.000Z	137 \| sensitive	50.139 \| moderate	167.857 \| moderate	9.274 \| good	0.491 \| good	24.914 \| good	0.652 \| good
2026-01-22T19:00:00.000Z	122 \| sensitive	44.015 \| moderate	109.59 \| fine	11.854 \| good	0.419 \| good	27.962 \| good	0.698 \| good
2026-01-22T20:00:00.000Z	105 \| sensitive	36.717 \| moderate	103.332 \| fine	12.93 \| good	0.378 \| good	27.708 \| good	0.555 \| good
2026-01-22T21:00:00.000Z	97 \| moderate	33.721 \| fine	102.666 \| fine	13.887 \| good	0.467 \| good	24.735 \| good	0.532 \| good
2026-01-22T22:00:00.000Z	110 \| sensitive	38.638 \| moderate	114.764 \| fine	14.868 \| good	0.602 \| good	22.865 \| good	0.512 \| good
2026-01-22T23:00:00.000Z	102 \| sensitive	36.156 \| moderate	87.837 \| fine	12.745 \| good	0.548 \| good	26.573 \| good	0.543 \| good
2026-01-23T00:00:00.000Z	88 \| moderate	29.233 \| fine	74.227 \| fine	10.644 \| good	0.331 \| good	27.608 \| good	0.575 \| good
2026-01-23T01:00:00.000Z	86 \| moderate	28.297 \| fine	64.148 \| fine	10.552 \| good	0.349 \| good	27.92 \| good	0.492 \| good
2026-01-23T02:00:00.000Z	77 \| moderate	22.756 \| fine	60.706 \| fine	12.307 \| good	0.358 \| good	22.152 \| good	0.512 \| good
2026-01-23T03:00:00.000Z	77 \| moderate	23.224 \| fine	61.099 \| fine	9.809 \| good	0.262 \| good	24.44 \| good	0.498 \| good
2026-01-23T04:00:00.000Z	79 \| moderate	23.731 \| fine	62.011 \| fine	9.097 \| good	0.338 \| good	22.536 \| good	0.449 \| good
2026-01-23T05:00:00.000Z	71 \| moderate	20.015 \| fine	49.928 \| good	7.295 \| good	0.554 \| good	23.753 \| good	0.574 \| good
2026-01-23T06:00:00.000Z	75 \| moderate	22.333 \| fine	53.628 \| good	10.623 \| good	0.375 \| good	24.774 \| good	0.576 \| good
2026-01-23T07:00:00.000Z	73 \| moderate	21.048 \| fine	55.2 \| fine	12.335 \| good	0.367 \| good	24.774 \| good	0.574 \| good
2026-01-23T08:00:00.000Z	90 \| moderate	30.189 \| fine	89.203 \| fine	7.327 \| good	0.614 \| good	20.91 \| good	0.613 \| good
2026-01-23T09:00:00.000Z	71 \| moderate	19.862 \| fine	54.366 \| good	6.778 \| good	0.424 \| good	17.883 \| good	0.671 \| good
2026-01-23T10:00:00.000Z	69 \| moderate	18.557 \| fine	43.226 \| good	2.898 \| good	0.486 \| good	18.018 \| good	0.672 \| good
2026-01-23T11:00:00.000Z	67 \| moderate	17.954 \| fine	42.614 \| good	3.924 \| good	0.348 \| good	20.06 \| good	0.585 \| good
2026-01-23T12:00:00.000Z	75 \| moderate	22.267 \| fine	46.248 \| good	5.737 \| good	0.452 \| good	18.948 \| good	0.532 \| good
2026-01-23T13:00:00.000Z	71 \| moderate	19.867 \| fine	48.546 \| good	5.445 \| good	0.452 \| good	18.948 \| good	0.532 \| good
2026-01-23T14:00:00.000Z	75 \| moderate	21.71 \| fine	64.49 \| fine	2.871 \| good	0.267 \| good	16.077 \| good	0.656 \| good
2026-01-23T14:00:00.000Z	75 \| moderate	21.71 \| fine	64.49 \| fine	2.871 \| good	0.267 \| good	16.077 \| good	0.656 \| good
2026-01-23T14:00:00.000Z	73 \| moderate	21.19 \| fine	92.959 \| fine	1.352 \| good	3.296 \| good	28.654 \| good	0.517 \| good
2026-01-23T15:00:00.000Z	77 \| moderate	23.126 \| fine	101.059 \| fine	1.508 \| good	3.154 \| good	28.12 \| good	0.523 \| good
2026-01-23T16:00:00.000Z	75 \| moderate	22.278 \| fine	97.04 \| fine	4.961 \| good	4.57 \| good	27.554 \| good	0.466 \| good
2026-01-23T17:00:00.000Z	71 \| moderate	20.355 \| fine	88.857 \| fine	13.64 \| good	5.986 \| good	26.988 \| good	0.409 \| good
2026-01-23T18:00:00.000Z	66 \| moderate	17.295 \| fine	76.789 \| fine	20.113 \| good	7.402 \| good	26.422 \| good	0.353 \| good
2026-01-23T19:00:00.000Z	56 \| moderate	12.3 \| fine	54.759 \| good	27.909 \| good	8.079 \| good	26.392 \| good	0.325 \| good
2026-01-23T20:00:00.000Z	49 \| good	9.074 \| good	40.805 \| good	31.733 \| good	8.756 \| good	26.361 \| good	0.297 \| good
2026-01-23T21:00:00.000Z	52 \| moderate	9.513 \| good	42.933 \| good	31.134 \| good	9.433 \| good	26.33 \| good	0.269 \| good
2026-01-23T22:00:00.000Z	52 \| moderate	10.182 \| good	45.065 \| good	29.167 \| good	9.643 \| good	27.466 \| good	0.263 \| good
2026-01-23T23:00:00.000Z	44 \| good	7.743 \| good	34.336 \| good	29.912 \| good	9.853 \| good	28.602 \| good	0.257 \| good
2026-01-24T00:00:00.000Z	30 \| good	1.733 \| good	7.226 \| good	31.504 \| good	10.063 \| good	29.738 \| good	0.252 \| good
2026-01-24T01:00:00.000Z	33 \| good	3.243 \| good	14.198 \| good	28.593 \| good	10.085 \| good	34.606 \| good	0.292 \| good
2026-01-24T02:00:00.000Z	38 \| good	6.827 \| good	30.161 \| good	23.548 \| good	10.107 \| good	39.474 \| good	0.333 \| good
2026-01-24T03:00:00.000Z	56 \| moderate	12.328 \| fine	55.14 \| fine	17.807 \| good	10.129 \| good	44.342 \| good	0.373 \| good
2026-01-24T04:00:00.000Z	66 \| moderate	16.537 \| fine	73.19 \| fine	12.715 \| good	10.449 \| good	43.923 \| good	0.385 \| good
2026-01-24T05:00:00.000Z	73 \| moderate	20.635 \| fine	90.955 \| fine	9.23 \| good	10.77 \| good	43.504 \| good	0.396 \| good
2026-01-24T06:00:00.000Z	77 \| moderate	23.052 \| fine	100.732 \| fine	7.882 \| good	11.09 \| good	43.085 \| good	0.407 \| good
2026-01-24T07:00:00.000Z	75 \| moderate	21.876 \| fine	96.634 \| fine	7.654 \| good	10.874 \| good	40.687 \| good	0.373 \| good
2026-01-24T08:00:00.000Z	79 \| moderate	23.648 \| fine	102.791 \| fine	7.951 \| good	10.657 \| good	38.29 \| good	0.338 \| good
2026-01-24T09:00:00.000Z	82 \| moderate	25.671 \| fine	112.56 \| fine	7.082 \| good	10.441 \| good	35.893 \| good	0.304 \| good
2026-01-24T10:00:00.000Z	81 \| moderate	24.804 \| fine	108.623 \| fine	6.228 \| good	10.469 \| good	34.816 \| good	0.297 \| good
2026-01-24T11:00:00.000Z	79 \| moderate	24.031 \| fine	104.702 \| fine	6.252 \| good	10.497 \| good	33.739 \| good	0.29 \| good
2026-01-24T12:00:00.000Z	82 \| moderate	25.567 \| fine	110.805 \| fine	5.206 \| good	10.525 \| good	32.662 \| good	0.283 \| good
2026-01-24T13:00:00.000Z	84 \| moderate	27.142 \| fine	118.591 \| fine	5.382 \| good	10.613 \| good	31.769 \| good	0.298 \| good
2026-01-24T14:00:00.000Z	77 \| moderate	23.324 \| fine	102.641 \| fine	5.984 \| good	10.701 \| good	30.876 \| good	0.314 \| good
2026-01-24T15:00:00.000Z	84 \| moderate	26.939 \| fine	116.848 \| fine	6 \| good	10.789 \| good	29.983 \| good	0.329 \| good
2026-01-24T16:00:00.000Z	71 \| moderate	20.439 \| fine	90.637 \| fine	13.973 \| good	10.085 \| good	26.098 \| good	0.299 \| good
2026-01-24T17:00:00.000Z	69 \| moderate	18.932 \| fine	82.915 \| fine	25.39 \| good	9.382 \| good	22.212 \| good	0.27 \| good
2026-01-24T18:00:00.000Z	58 \| moderate	12.98 \| fine	58.812 \| fine	29.499 \| good	8.678 \| good	18.327 \| good	0.24 \| good
2026-01-24T19:00:00.000Z	54 \| moderate	11.056 \| good	48.94 \| good	33.379 \| good	7.961 \| good	16.375 \| good	0.225 \| good
2026-01-24T20:00:00.000Z	49 \| good	9.139 \| good	40.993 \| good	35.001 \| good	7.245 \| good	14.423 \| good	0.21 \| good
2026-01-24T21:00:00.000Z	38 \| good	6.829 \| good	30.084 \| good	36.427 \| good	6.528 \| good	12.471 \| good	0.196 \| good
2026-01-24T22:00:00.000Z	34 \| good	6.381 \| good	28.119 \| good	37.47 \| good	6.407 \| good	12.902 \| good	0.195 \| good
2026-01-24T23:00:00.000Z	38 \| good	6.546 \| good	29.11 \| good	37.467 \| good	6.285 \| good	13.334 \| good	0.195 \| good
2026-01-25T00:00:00.000Z	36 \| good	3.683 \| good	16.073 \| good	39.413 \| good	6.164 \| good	13.766 \| good	0.195 \| good
2026-01-25T01:00:00.000Z	33 \| good	4.842 \| good	21.075 \| good	35.849 \| good	5.924 \| good	20.004 \| good	0.225 \| good
2026-01-25T02:00:00.000Z	33 \| good	5.555 \| good	23.987 \| good	31.748 \| good	5.684 \| good	26.242 \| good	0.256 \| good
2026-01-25T03:00:00.000Z	44 \| good	7.835 \| good	34.109 \| good	28.685 \| good	5.444 \| good	32.48 \| good	0.287 \| good
2026-01-25T04:00:00.000Z	52 \| moderate	9.548 \| good	42.96 \| good	21.451 \| good	5.674 \| good	31.737 \| good	0.321 \| good
2026-01-25T05:00:00.000Z	52 \| moderate	10.28 \| good	45.059 \| good	17.029 \| good	5.905 \| good	30.994 \| good	0.355 \| good
2026-01-25T06:00:00.000Z	99 \| moderate	35.329 \| fine	36.027 \| good	10.269 \| good	6.052 \| good	30.068 \| good	0.385 \| good
2026-01-25T07:00:00.000Z	54 \| moderate	11.43 \| good	50.944 \| good	7.425 \| good	5.215 \| good	28.396 \| good	0.355 \| good
2026-01-25T08:00:00.000Z	56 \| moderate	12.486 \| fine	56.834 \| fine	10.368 \| good	4.295 \| good	26.542 \| good	0.323 \| good
2026-01-25T09:00:00.000Z	64 \| moderate	15.532 \| fine	68.96 \| fine	9.845 \| good	3.376 \| good	24.688 \| good	0.29 \| good
2026-01-25T10:00:00.000Z	66 \| moderate	17.497 \| fine	77.096 \| fine	8.512 \| good	2.819 \| good	23.959 \| good	0.26 \| good
2026-01-25T11:00:00.000Z	66 \| moderate	17.158 \| fine	76.827 \| fine	8.195 \| good	2.263 \| good	23.229 \| good	0.23 \| good
2026-01-25T12:00:00.000Z	52 \| moderate	10.244 \| good	10.382 \| good	10.763 \| good	1.698 \| good	22.371 \| good	0.2 \| good
2026-01-25T13:00:00.000Z	44 \| good	8.027 \| good	8.174 \| good	11.059 \| good	1.689 \| good	22.621 \| good	0.195 \| 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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La Puente, California

Covina, 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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