What is the PM10 level in Palo Alto, California at the moment?

The PM10 concentration in Palo Alto, California is 35.232 μg/m3 at the moment.

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

Currently, Palo Alto, California has a sulfur dioxide (SO2) concentration of 1.365 ppb.

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

The current ozone (O3) level in Palo Alto, California at the moment is 33.291 ppm.

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

Nitrogen dioxide (NO2) level in Palo Alto, California at the moment is 5.436 ppb.

Live air quality index in Palo Alto, California today

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

PM2.5 levels in Palo Alto, California are currently 7.887 μg/m3.

Stay updated with real-time air quality in Palo Alto, California featuring accurate data on AQI, PM_2.5, PM₁₀, O₃, NO₂, SO₂, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.

Live AQI (Air Quality Index)

Good

Palo Alto, California

Last updated: ... (Local time)

Major air pollutants in Palo Alto, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

7.89 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

35.23 μg/m³

155

255

425

605+

Ozone (O₃)

33.29 ppb

201

201+

Sulfur Dioxide (SO₂)

1.36 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.44 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.23 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

Palo Alto, California

Get Live Pollen Counts

Palo Alto, California

Scroll To Air Quality Map

Track live Palo Alto, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-21T02:00:00.000Z	32 \| good	4.915 \| good	21.582 \| good	34.934 \| good	0.83 \| good	5.508 \| good	0.248 \| good
2025-10-21T03:00:00.000Z	56 \| moderate	11.723 \| good	52.901 \| good	23.132 \| good	1.487 \| good	31.353 \| good	0.363 \| good
2025-10-21T04:00:00.000Z	38 \| good	6.811 \| good	29.862 \| good	33.136 \| good	0.818 \| good	15.317 \| good	0.469 \| good
2025-10-21T05:00:00.000Z	44 \| good	7.774 \| good	34.051 \| good	28.082 \| good	0.828 \| good	20.496 \| good	0.661 \| good
2025-10-21T06:00:00.000Z	38 \| good	7.422 \| good	31.457 \| good	24.971 \| good	0.781 \| good	20.178 \| good	0.652 \| good
2025-10-21T07:00:00.000Z	44 \| good	7.81 \| good	33.608 \| good	26.97 \| good	0.751 \| good	16.884 \| good	0.59 \| good
2025-10-21T08:00:00.000Z	38 \| good	6.923 \| good	30.616 \| good	26.022 \| good	0.767 \| good	14.683 \| good	0.564 \| good
2025-10-21T09:00:00.000Z	33 \| good	5.973 \| good	24.455 \| good	20.045 \| good	0.811 \| good	12.996 \| good	0.448 \| good
2025-10-21T10:00:00.000Z	27 \| good	5.149 \| good	21.476 \| good	17.33 \| good	0.84 \| good	12.631 \| good	0.435 \| good
2025-10-21T11:00:00.000Z	22 \| good	3.7 \| good	14.963 \| good	13.406 \| good	0.815 \| good	14.211 \| good	0.423 \| good
2025-10-21T12:00:00.000Z	22 \| good	3.792 \| good	14.807 \| good	16.48 \| good	0.814 \| good	13.011 \| good	0.422 \| good
2025-10-21T13:00:00.000Z	22 \| good	3.76 \| good	15.063 \| good	12.827 \| good	0.865 \| good	13.607 \| good	0.524 \| good
2025-10-21T14:00:00.000Z	22 \| good	4.421 \| good	19.632 \| good	11.355 \| good	0.667 \| good	13.594 \| good	0.59 \| good
2025-10-21T15:00:00.000Z	33 \| good	6.424 \| good	27.606 \| good	11.06 \| good	0.753 \| good	20.226 \| good	0.563 \| good
2025-10-21T16:00:00.000Z	33 \| good	6.381 \| good	28.277 \| good	10.882 \| good	0.769 \| good	20.739 \| good	0.715 \| good
2025-10-21T17:00:00.000Z	44 \| good	8.372 \| good	37.133 \| good	17.622 \| good	0.891 \| good	19.988 \| good	0.89 \| good
2025-10-21T18:00:00.000Z	52 \| moderate	10.056 \| good	43.599 \| good	16.895 \| good	1.507 \| good	17.808 \| good	0.438 \| good
2025-10-21T19:00:00.000Z	52 \| moderate	10.114 \| good	44.772 \| good	24.091 \| good	1.509 \| good	14.015 \| good	0.392 \| good
2025-10-21T20:00:00.000Z	52 \| moderate	10.018 \| good	43.305 \| good	30.978 \| good	1.155 \| good	9.73 \| good	0.291 \| good
2025-10-21T21:00:00.000Z	52 \| moderate	9.758 \| good	43.437 \| good	34.742 \| good	1.099 \| good	6.554 \| good	0.274 \| good
2025-10-21T22:00:00.000Z	56 \| moderate	11.51 \| good	51.006 \| good	37.507 \| good	0.928 \| good	5.564 \| good	0.271 \| good
2025-10-21T23:00:00.000Z	56 \| moderate	11.832 \| good	53.854 \| good	40.209 \| good	0.808 \| good	3.25 \| good	0.247 \| good
2025-10-22T00:00:00.000Z	54 \| moderate	11.192 \| good	50.316 \| good	41.668 \| good	0.696 \| good	3.548 \| good	0.269 \| good
2025-10-22T01:00:00.000Z	54 \| moderate	11.112 \| good	49.527 \| good	40.957 \| good	0.762 \| good	4.818 \| good	0.293 \| good
2025-10-22T02:00:00.000Z	54 \| moderate	10.871 \| good	48.967 \| good	45.633 \| good	0.672 \| good	7.139 \| good	0.3 \| good
2025-10-22T03:00:00.000Z	38 \| good	7.338 \| good	32.325 \| good	29.991 \| good	1.513 \| good	22.204 \| good	0.273 \| good
2025-10-22T04:00:00.000Z	52 \| moderate	9.846 \| good	42.972 \| good	37.221 \| good	0.659 \| good	6.686 \| good	0.265 \| good
2025-10-22T05:00:00.000Z	52 \| moderate	10.055 \| good	43.798 \| good	36.216 \| good	0.681 \| good	6.168 \| good	0.247 \| good
2025-10-22T06:00:00.000Z	49 \| good	8.5 \| good	37.677 \| good	29.941 \| good	0.625 \| good	7.29 \| good	0.246 \| good
2025-10-22T07:00:00.000Z	44 \| good	8.393 \| good	38.054 \| good	31.412 \| good	0.606 \| good	5.776 \| good	0.243 \| good
2025-10-22T08:00:00.000Z	38 \| good	6.654 \| good	28.169 \| good	29.859 \| good	0.561 \| good	4.635 \| good	0.32 \| good
2025-10-22T09:00:00.000Z	38 \| good	6.552 \| good	28.79 \| good	26.546 \| good	0.561 \| good	4.283 \| good	0.204 \| good
2025-10-22T10:00:00.000Z	29 \| good	4.82 \| good	21.25 \| good	31.002 \| good	0.58 \| good	2.724 \| good	0.204 \| good
2025-10-22T11:00:00.000Z	31 \| good	4.79 \| good	20.187 \| good	33.564 \| good	0.601 \| good	2.875 \| good	0.18 \| good
2025-10-22T12:00:00.000Z	26 \| good	4.279 \| good	18.346 \| good	28.388 \| good	0.633 \| good	4.313 \| good	0.163 \| good
2025-10-22T13:00:00.000Z	27 \| good	4.259 \| good	20.436 \| good	28.853 \| good	0.508 \| good	4.193 \| good	0.193 \| good
2025-10-22T14:00:00.000Z	29 \| good	5.035 \| good	21.702 \| good	31.048 \| good	0.909 \| good	7.283 \| good	0.196 \| good
2025-10-22T15:00:00.000Z	29 \| good	4.96 \| good	21.452 \| good	31.084 \| good	0.867 \| good	6.6 \| good	0.221 \| good
2025-10-22T16:00:00.000Z	27 \| good	5.121 \| good	22.515 \| good	29.425 \| good	0.881 \| good	7.391 \| good	0.219 \| good
2025-10-22T17:00:00.000Z	33 \| good	6.493 \| good	29.018 \| good	29.801 \| good	1.206 \| good	8.135 \| good	0.308 \| good
2025-10-22T18:00:00.000Z	38 \| good	7.027 \| good	31.086 \| good	29.602 \| good	1.214 \| good	7.291 \| good	0.259 \| good
2025-10-22T19:00:00.000Z	33 \| good	6.422 \| good	29.316 \| good	32.666 \| good	0.619 \| good	6.539 \| good	0.251 \| good
2025-10-22T20:00:00.000Z	33 \| good	6.213 \| good	27.498 \| good	31.755 \| good	0.438 \| good	5.917 \| good	0.237 \| good
2025-10-22T21:00:00.000Z	38 \| good	6.877 \| good	30.752 \| good	33.703 \| good	0.415 \| good	4.509 \| good	0.217 \| good
2025-10-22T22:00:00.000Z	44 \| good	7.682 \| good	33.557 \| good	33.613 \| good	0.51 \| good	4.714 \| good	0.22 \| good
2025-10-22T23:00:00.000Z	44 \| good	7.504 \| good	32.915 \| good	34.748 \| good	0.64 \| good	4.459 \| good	0.22 \| good
2025-10-23T00:00:00.000Z	44 \| good	7.914 \| good	35.002 \| good	34.278 \| good	1.782 \| good	4.755 \| good	0.234 \| good
2025-10-23T01:00:00.000Z	44 \| good	7.887 \| good	35.232 \| good	33.291 \| good	1.365 \| good	5.436 \| good	0.225 \| good
2025-10-23T01:00:00.000Z	44 \| good	7.887 \| good	35.232 \| good	33.291 \| good	1.365 \| good	5.436 \| good	0.225 \| good
2025-10-23T02:00:00.000Z	29 \| good	3.096 \| good	13.362 \| good	31.197 \| good	0.845 \| good	8.33 \| good	0.16 \| good
2025-10-23T03:00:00.000Z	26 \| good	4.48 \| good	19.481 \| good	28.225 \| good	0.95 \| good	11.235 \| good	0.176 \| good
2025-10-23T04:00:00.000Z	33 \| good	5.64 \| good	24.454 \| good	23.79 \| good	0.978 \| good	13.067 \| good	0.187 \| good
2025-10-23T05:00:00.000Z	16 \| good	3.244 \| good	13.857 \| good	17.374 \| good	1.006 \| good	14.898 \| good	0.198 \| good
2025-10-23T06:00:00.000Z	18 \| good	2.426 \| good	10.22 \| good	19.266 \| good	1.033 \| good	16.729 \| good	0.208 \| good
2025-10-23T07:00:00.000Z	20 \| good	1.9 \| good	7.865 \| good	22.027 \| good	0.975 \| good	15.185 \| good	0.2 \| good
2025-10-23T08:00:00.000Z	20 \| good	1.555 \| good	6.564 \| good	21.564 \| good	0.917 \| good	13.64 \| good	0.192 \| good
2025-10-23T09:00:00.000Z	18 \| good	1.347 \| good	5.599 \| good	19.486 \| good	0.86 \| good	12.095 \| good	0.184 \| good
2025-10-23T10:00:00.000Z	14 \| good	1.388 \| good	5.623 \| good	15.454 \| good	0.782 \| good	10.165 \| good	0.174 \| good
2025-10-23T11:00:00.000Z	13 \| good	1.489 \| good	5.948 \| good	13.629 \| good	0.705 \| good	8.234 \| good	0.164 \| good
2025-10-23T12:00:00.000Z	16 \| good	2.701 \| good	11.498 \| good	11.253 \| good	0.628 \| good	6.303 \| good	0.153 \| good
2025-10-23T13:00:00.000Z	16 \| good	2.838 \| good	11.775 \| good	14.935 \| good	0.659 \| good	7.509 \| good	0.163 \| good
2025-10-23T14:00:00.000Z	16 \| good	1.405 \| good	5.833 \| good	16.915 \| good	0.689 \| good	8.715 \| good	0.173 \| good
2025-10-23T15:00:00.000Z	21 \| good	1.627 \| good	6.765 \| good	23.263 \| good	0.72 \| good	9.921 \| good	0.184 \| good
2025-10-23T16:00:00.000Z	25 \| good	1.29 \| good	5.007 \| good	26.719 \| good	0.791 \| good	7.942 \| good	0.172 \| good
2025-10-23T17:00:00.000Z	27 \| good	3.427 \| good	14.768 \| good	28.711 \| good	0.861 \| good	5.964 \| good	0.16 \| good
2025-10-23T18:00:00.000Z	30 \| good	3.143 \| good	13.673 \| good	32.333 \| good	0.932 \| good	3.985 \| good	0.149 \| good
2025-10-23T19:00:00.000Z	32 \| good	2.97 \| good	12.247 \| good	35.416 \| good	0.976 \| good	3.666 \| good	0.147 \| good
2025-10-23T20:00:00.000Z	35 \| good	1.939 \| good	8.141 \| good	38.482 \| good	1.021 \| good	3.347 \| good	0.145 \| good
2025-10-23T21:00:00.000Z	36 \| good	2.269 \| good	9.086 \| good	39.229 \| good	1.065 \| good	3.028 \| good	0.144 \| good
2025-10-23T22:00:00.000Z	40 \| good	2.377 \| good	9.874 \| good	43.031 \| good	1.105 \| good	3.334 \| good	0.144 \| good
2025-10-23T23:00:00.000Z	41 \| good	2.396 \| good	10.022 \| good	44.189 \| good	1.144 \| good	3.641 \| good	0.144 \| good
2025-10-24T00:00:00.000Z	40 \| good	2.069 \| good	8.464 \| good	42.869 \| good	1.184 \| good	3.948 \| good	0.144 \| good
2025-10-24T01:00:00.000Z	31 \| good	3.746 \| good	16.399 \| good	33.242 \| good	1.211 \| good	7.696 \| good	0.164 \| good
2025-10-24T02:00:00.000Z	33 \| good	5.825 \| good	25.765 \| good	27.165 \| good	1.237 \| good	11.443 \| good	0.184 \| good
2025-10-24T03:00:00.000Z	27 \| good	4.208 \| good	18.194 \| good	29.225 \| good	1.264 \| good	15.191 \| good	0.204 \| good
2025-10-24T04:00:00.000Z	27 \| good	4.506 \| good	19.987 \| good	26.548 \| good	1.292 \| good	16.561 \| good	0.213 \| good
2025-10-24T05:00:00.000Z	20 \| good	3.419 \| good	14.932 \| good	21.594 \| good	1.319 \| good	17.93 \| good	0.223 \| good
2025-10-24T06:00:00.000Z	18 \| good	2.288 \| good	9.4 \| good	19.182 \| good	1.347 \| good	19.299 \| good	0.233 \| good
2025-10-24T07:00:00.000Z	17 \| good	2.123 \| good	8.973 \| good	17.038 \| good	1.258 \| good	18.498 \| good	0.223 \| good
2025-10-24T08:00:00.000Z	17 \| good	1.64 \| good	6.654 \| good	16.521 \| good	1.17 \| good	17.696 \| good	0.213 \| good
2025-10-24T09:00:00.000Z	16 \| good	1.626 \| good	6.491 \| good	15.583 \| good	1.082 \| good	16.894 \| good	0.202 \| good
2025-10-24T10:00:00.000Z	14 \| good	1.384 \| good	5.64 \| good	14.803 \| good	1.053 \| good	15.49 \| good	0.192 \| good
2025-10-24T11:00:00.000Z	16 \| good	1.179 \| good	4.76 \| good	17.058 \| good	1.024 \| good	14.086 \| good	0.182 \| good
2025-10-24T12:00:00.000Z	13 \| good	1.26 \| good	4.997 \| good	14.02 \| good	0.995 \| good	12.682 \| good	0.173 \| good
2025-10-24T13:00:00.000Z	12 \| good	1.359 \| good	5.206 \| good	12.315 \| good	1.029 \| good	12.883 \| good	0.179 \| good
2025-10-24T14:00:00.000Z	16 \| good	2.567 \| good	10.797 \| good	8.228 \| good	1.062 \| good	13.084 \| good	0.185 \| good
2025-10-24T15:00:00.000Z	22 \| good	3.882 \| good	16.748 \| good	13.043 \| good	1.095 \| good	13.285 \| good	0.191 \| good
2025-10-24T16:00:00.000Z	22 \| good	3.96 \| good	17.235 \| good	20.25 \| good	1.103 \| good	10.362 \| good	0.17 \| good
2025-10-24T17:00:00.000Z	27 \| good	4.858 \| good	21.252 \| good	25.652 \| good	1.11 \| good	7.438 \| good	0.149 \| good
2025-10-24T18:00:00.000Z	27 \| good	2.86 \| good	11.861 \| good	29.108 \| good	1.117 \| good	4.514 \| good	0.128 \| good
2025-10-24T19:00:00.000Z	29 \| good	2.365 \| good	10.099 \| good	30.964 \| good	1.044 \| good	3.87 \| good	0.123 \| good
2025-10-24T20:00:00.000Z	31 \| good	1.905 \| good	8.127 \| good	34.249 \| good	0.971 \| good	3.226 \| good	0.118 \| good
2025-10-24T21:00:00.000Z	32 \| good	1.734 \| good	7.115 \| good	34.739 \| good	0.898 \| good	2.581 \| good	0.113 \| good
2025-10-24T22:00:00.000Z	33 \| good	1.552 \| good	6.063 \| good	35.512 \| good	0.889 \| good	2.779 \| good	0.112 \| good
2025-10-24T23:00:00.000Z	33 \| good	1.284 \| good	5.146 \| good	35.96 \| good	0.88 \| good	2.978 \| good	0.111 \| good
2025-10-25T00:00:00.000Z	38 \| good	6.955 \| good	9.601 \| good	38.071 \| good	0.856 \| good	3.112 \| good	0.109 \| good
2025-10-25T01:00:00.000Z	26 \| good	1.226 \| good	4.811 \| good	27.541 \| good	0.951 \| good	6.62 \| good	0.127 \| good

Palo Alto

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

0.26ppm

How accurate is California, USA air quality data?

Air quality and pollutant data for California, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

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Frequently asked questions

How often is air quality information updated for Palo Alto, California?

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

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

In the past 24 hours, the air quality in Palo Alto, California was at its worst at 02:00:00 on 2025-10-22.

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

In the last 24 hours, the best air quality in Palo Alto, California was observed at 12:00:00 on 2025-10-22.

What is the AQI in Palo Alto, California right now?

As of now, the AQI in Palo Alto, California is 44, indicating Good conditions.

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

Palo Alto, California air has the highest levels of PM2.5.

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

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

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

PM_2.5 levels in Palo Alto, California are currently 7.887 μg/m³.

What is the PM₁₀ level in Palo Alto, California at the moment?

The PM₁₀ concentration in Palo Alto, California is 35.232 μg/m³ at the moment.

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

The current carbon monoxide (CO) concentration in Palo Alto, California is 0.225 ppm.

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

Currently, Palo Alto, California has a sulfur dioxide (SO₂) concentration of 1.365 ppb.

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

The current ozone (O₃) level in Palo Alto, California at the moment is 33.291 ppm.

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

Nitrogen dioxide (NO₂) level in Palo Alto, California at the moment is 5.436 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-21T02:00:00.000Z	32 \| good	4.915 \| good	21.582 \| good	34.934 \| good	0.83 \| good	5.508 \| good	0.248 \| good
2025-10-21T03:00:00.000Z	56 \| moderate	11.723 \| good	52.901 \| good	23.132 \| good	1.487 \| good	31.353 \| good	0.363 \| good
2025-10-21T04:00:00.000Z	38 \| good	6.811 \| good	29.862 \| good	33.136 \| good	0.818 \| good	15.317 \| good	0.469 \| good
2025-10-21T05:00:00.000Z	44 \| good	7.774 \| good	34.051 \| good	28.082 \| good	0.828 \| good	20.496 \| good	0.661 \| good
2025-10-21T06:00:00.000Z	38 \| good	7.422 \| good	31.457 \| good	24.971 \| good	0.781 \| good	20.178 \| good	0.652 \| good
2025-10-21T07:00:00.000Z	44 \| good	7.81 \| good	33.608 \| good	26.97 \| good	0.751 \| good	16.884 \| good	0.59 \| good
2025-10-21T08:00:00.000Z	38 \| good	6.923 \| good	30.616 \| good	26.022 \| good	0.767 \| good	14.683 \| good	0.564 \| good
2025-10-21T09:00:00.000Z	33 \| good	5.973 \| good	24.455 \| good	20.045 \| good	0.811 \| good	12.996 \| good	0.448 \| good
2025-10-21T10:00:00.000Z	27 \| good	5.149 \| good	21.476 \| good	17.33 \| good	0.84 \| good	12.631 \| good	0.435 \| good
2025-10-21T11:00:00.000Z	22 \| good	3.7 \| good	14.963 \| good	13.406 \| good	0.815 \| good	14.211 \| good	0.423 \| good
2025-10-21T12:00:00.000Z	22 \| good	3.792 \| good	14.807 \| good	16.48 \| good	0.814 \| good	13.011 \| good	0.422 \| good
2025-10-21T13:00:00.000Z	22 \| good	3.76 \| good	15.063 \| good	12.827 \| good	0.865 \| good	13.607 \| good	0.524 \| good
2025-10-21T14:00:00.000Z	22 \| good	4.421 \| good	19.632 \| good	11.355 \| good	0.667 \| good	13.594 \| good	0.59 \| good
2025-10-21T15:00:00.000Z	33 \| good	6.424 \| good	27.606 \| good	11.06 \| good	0.753 \| good	20.226 \| good	0.563 \| good
2025-10-21T16:00:00.000Z	33 \| good	6.381 \| good	28.277 \| good	10.882 \| good	0.769 \| good	20.739 \| good	0.715 \| good
2025-10-21T17:00:00.000Z	44 \| good	8.372 \| good	37.133 \| good	17.622 \| good	0.891 \| good	19.988 \| good	0.89 \| good
2025-10-21T18:00:00.000Z	52 \| moderate	10.056 \| good	43.599 \| good	16.895 \| good	1.507 \| good	17.808 \| good	0.438 \| good
2025-10-21T19:00:00.000Z	52 \| moderate	10.114 \| good	44.772 \| good	24.091 \| good	1.509 \| good	14.015 \| good	0.392 \| good
2025-10-21T20:00:00.000Z	52 \| moderate	10.018 \| good	43.305 \| good	30.978 \| good	1.155 \| good	9.73 \| good	0.291 \| good
2025-10-21T21:00:00.000Z	52 \| moderate	9.758 \| good	43.437 \| good	34.742 \| good	1.099 \| good	6.554 \| good	0.274 \| good
2025-10-21T22:00:00.000Z	56 \| moderate	11.51 \| good	51.006 \| good	37.507 \| good	0.928 \| good	5.564 \| good	0.271 \| good
2025-10-21T23:00:00.000Z	56 \| moderate	11.832 \| good	53.854 \| good	40.209 \| good	0.808 \| good	3.25 \| good	0.247 \| good
2025-10-22T00:00:00.000Z	54 \| moderate	11.192 \| good	50.316 \| good	41.668 \| good	0.696 \| good	3.548 \| good	0.269 \| good
2025-10-22T01:00:00.000Z	54 \| moderate	11.112 \| good	49.527 \| good	40.957 \| good	0.762 \| good	4.818 \| good	0.293 \| good
2025-10-22T02:00:00.000Z	54 \| moderate	10.871 \| good	48.967 \| good	45.633 \| good	0.672 \| good	7.139 \| good	0.3 \| good
2025-10-22T03:00:00.000Z	38 \| good	7.338 \| good	32.325 \| good	29.991 \| good	1.513 \| good	22.204 \| good	0.273 \| good
2025-10-22T04:00:00.000Z	52 \| moderate	9.846 \| good	42.972 \| good	37.221 \| good	0.659 \| good	6.686 \| good	0.265 \| good
2025-10-22T05:00:00.000Z	52 \| moderate	10.055 \| good	43.798 \| good	36.216 \| good	0.681 \| good	6.168 \| good	0.247 \| good
2025-10-22T06:00:00.000Z	49 \| good	8.5 \| good	37.677 \| good	29.941 \| good	0.625 \| good	7.29 \| good	0.246 \| good
2025-10-22T07:00:00.000Z	44 \| good	8.393 \| good	38.054 \| good	31.412 \| good	0.606 \| good	5.776 \| good	0.243 \| good
2025-10-22T08:00:00.000Z	38 \| good	6.654 \| good	28.169 \| good	29.859 \| good	0.561 \| good	4.635 \| good	0.32 \| good
2025-10-22T09:00:00.000Z	38 \| good	6.552 \| good	28.79 \| good	26.546 \| good	0.561 \| good	4.283 \| good	0.204 \| good
2025-10-22T10:00:00.000Z	29 \| good	4.82 \| good	21.25 \| good	31.002 \| good	0.58 \| good	2.724 \| good	0.204 \| good
2025-10-22T11:00:00.000Z	31 \| good	4.79 \| good	20.187 \| good	33.564 \| good	0.601 \| good	2.875 \| good	0.18 \| good
2025-10-22T12:00:00.000Z	26 \| good	4.279 \| good	18.346 \| good	28.388 \| good	0.633 \| good	4.313 \| good	0.163 \| good
2025-10-22T13:00:00.000Z	27 \| good	4.259 \| good	20.436 \| good	28.853 \| good	0.508 \| good	4.193 \| good	0.193 \| good
2025-10-22T14:00:00.000Z	29 \| good	5.035 \| good	21.702 \| good	31.048 \| good	0.909 \| good	7.283 \| good	0.196 \| good
2025-10-22T15:00:00.000Z	29 \| good	4.96 \| good	21.452 \| good	31.084 \| good	0.867 \| good	6.6 \| good	0.221 \| good
2025-10-22T16:00:00.000Z	27 \| good	5.121 \| good	22.515 \| good	29.425 \| good	0.881 \| good	7.391 \| good	0.219 \| good
2025-10-22T17:00:00.000Z	33 \| good	6.493 \| good	29.018 \| good	29.801 \| good	1.206 \| good	8.135 \| good	0.308 \| good
2025-10-22T18:00:00.000Z	38 \| good	7.027 \| good	31.086 \| good	29.602 \| good	1.214 \| good	7.291 \| good	0.259 \| good
2025-10-22T19:00:00.000Z	33 \| good	6.422 \| good	29.316 \| good	32.666 \| good	0.619 \| good	6.539 \| good	0.251 \| good
2025-10-22T20:00:00.000Z	33 \| good	6.213 \| good	27.498 \| good	31.755 \| good	0.438 \| good	5.917 \| good	0.237 \| good
2025-10-22T21:00:00.000Z	38 \| good	6.877 \| good	30.752 \| good	33.703 \| good	0.415 \| good	4.509 \| good	0.217 \| good
2025-10-22T22:00:00.000Z	44 \| good	7.682 \| good	33.557 \| good	33.613 \| good	0.51 \| good	4.714 \| good	0.22 \| good
2025-10-22T23:00:00.000Z	44 \| good	7.504 \| good	32.915 \| good	34.748 \| good	0.64 \| good	4.459 \| good	0.22 \| good
2025-10-23T00:00:00.000Z	44 \| good	7.914 \| good	35.002 \| good	34.278 \| good	1.782 \| good	4.755 \| good	0.234 \| good
2025-10-23T01:00:00.000Z	44 \| good	7.887 \| good	35.232 \| good	33.291 \| good	1.365 \| good	5.436 \| good	0.225 \| good
2025-10-23T01:00:00.000Z	44 \| good	7.887 \| good	35.232 \| good	33.291 \| good	1.365 \| good	5.436 \| good	0.225 \| good
2025-10-23T02:00:00.000Z	29 \| good	3.096 \| good	13.362 \| good	31.197 \| good	0.845 \| good	8.33 \| good	0.16 \| good
2025-10-23T03:00:00.000Z	26 \| good	4.48 \| good	19.481 \| good	28.225 \| good	0.95 \| good	11.235 \| good	0.176 \| good
2025-10-23T04:00:00.000Z	33 \| good	5.64 \| good	24.454 \| good	23.79 \| good	0.978 \| good	13.067 \| good	0.187 \| good
2025-10-23T05:00:00.000Z	16 \| good	3.244 \| good	13.857 \| good	17.374 \| good	1.006 \| good	14.898 \| good	0.198 \| good
2025-10-23T06:00:00.000Z	18 \| good	2.426 \| good	10.22 \| good	19.266 \| good	1.033 \| good	16.729 \| good	0.208 \| good
2025-10-23T07:00:00.000Z	20 \| good	1.9 \| good	7.865 \| good	22.027 \| good	0.975 \| good	15.185 \| good	0.2 \| good
2025-10-23T08:00:00.000Z	20 \| good	1.555 \| good	6.564 \| good	21.564 \| good	0.917 \| good	13.64 \| good	0.192 \| good
2025-10-23T09:00:00.000Z	18 \| good	1.347 \| good	5.599 \| good	19.486 \| good	0.86 \| good	12.095 \| good	0.184 \| good
2025-10-23T10:00:00.000Z	14 \| good	1.388 \| good	5.623 \| good	15.454 \| good	0.782 \| good	10.165 \| good	0.174 \| good
2025-10-23T11:00:00.000Z	13 \| good	1.489 \| good	5.948 \| good	13.629 \| good	0.705 \| good	8.234 \| good	0.164 \| good
2025-10-23T12:00:00.000Z	16 \| good	2.701 \| good	11.498 \| good	11.253 \| good	0.628 \| good	6.303 \| good	0.153 \| good
2025-10-23T13:00:00.000Z	16 \| good	2.838 \| good	11.775 \| good	14.935 \| good	0.659 \| good	7.509 \| good	0.163 \| good
2025-10-23T14:00:00.000Z	16 \| good	1.405 \| good	5.833 \| good	16.915 \| good	0.689 \| good	8.715 \| good	0.173 \| good
2025-10-23T15:00:00.000Z	21 \| good	1.627 \| good	6.765 \| good	23.263 \| good	0.72 \| good	9.921 \| good	0.184 \| good
2025-10-23T16:00:00.000Z	25 \| good	1.29 \| good	5.007 \| good	26.719 \| good	0.791 \| good	7.942 \| good	0.172 \| good
2025-10-23T17:00:00.000Z	27 \| good	3.427 \| good	14.768 \| good	28.711 \| good	0.861 \| good	5.964 \| good	0.16 \| good
2025-10-23T18:00:00.000Z	30 \| good	3.143 \| good	13.673 \| good	32.333 \| good	0.932 \| good	3.985 \| good	0.149 \| good
2025-10-23T19:00:00.000Z	32 \| good	2.97 \| good	12.247 \| good	35.416 \| good	0.976 \| good	3.666 \| good	0.147 \| good
2025-10-23T20:00:00.000Z	35 \| good	1.939 \| good	8.141 \| good	38.482 \| good	1.021 \| good	3.347 \| good	0.145 \| good
2025-10-23T21:00:00.000Z	36 \| good	2.269 \| good	9.086 \| good	39.229 \| good	1.065 \| good	3.028 \| good	0.144 \| good
2025-10-23T22:00:00.000Z	40 \| good	2.377 \| good	9.874 \| good	43.031 \| good	1.105 \| good	3.334 \| good	0.144 \| good
2025-10-23T23:00:00.000Z	41 \| good	2.396 \| good	10.022 \| good	44.189 \| good	1.144 \| good	3.641 \| good	0.144 \| good
2025-10-24T00:00:00.000Z	40 \| good	2.069 \| good	8.464 \| good	42.869 \| good	1.184 \| good	3.948 \| good	0.144 \| good
2025-10-24T01:00:00.000Z	31 \| good	3.746 \| good	16.399 \| good	33.242 \| good	1.211 \| good	7.696 \| good	0.164 \| good
2025-10-24T02:00:00.000Z	33 \| good	5.825 \| good	25.765 \| good	27.165 \| good	1.237 \| good	11.443 \| good	0.184 \| good
2025-10-24T03:00:00.000Z	27 \| good	4.208 \| good	18.194 \| good	29.225 \| good	1.264 \| good	15.191 \| good	0.204 \| good
2025-10-24T04:00:00.000Z	27 \| good	4.506 \| good	19.987 \| good	26.548 \| good	1.292 \| good	16.561 \| good	0.213 \| good
2025-10-24T05:00:00.000Z	20 \| good	3.419 \| good	14.932 \| good	21.594 \| good	1.319 \| good	17.93 \| good	0.223 \| good
2025-10-24T06:00:00.000Z	18 \| good	2.288 \| good	9.4 \| good	19.182 \| good	1.347 \| good	19.299 \| good	0.233 \| good
2025-10-24T07:00:00.000Z	17 \| good	2.123 \| good	8.973 \| good	17.038 \| good	1.258 \| good	18.498 \| good	0.223 \| good
2025-10-24T08:00:00.000Z	17 \| good	1.64 \| good	6.654 \| good	16.521 \| good	1.17 \| good	17.696 \| good	0.213 \| good
2025-10-24T09:00:00.000Z	16 \| good	1.626 \| good	6.491 \| good	15.583 \| good	1.082 \| good	16.894 \| good	0.202 \| good
2025-10-24T10:00:00.000Z	14 \| good	1.384 \| good	5.64 \| good	14.803 \| good	1.053 \| good	15.49 \| good	0.192 \| good
2025-10-24T11:00:00.000Z	16 \| good	1.179 \| good	4.76 \| good	17.058 \| good	1.024 \| good	14.086 \| good	0.182 \| good
2025-10-24T12:00:00.000Z	13 \| good	1.26 \| good	4.997 \| good	14.02 \| good	0.995 \| good	12.682 \| good	0.173 \| good
2025-10-24T13:00:00.000Z	12 \| good	1.359 \| good	5.206 \| good	12.315 \| good	1.029 \| good	12.883 \| good	0.179 \| good
2025-10-24T14:00:00.000Z	16 \| good	2.567 \| good	10.797 \| good	8.228 \| good	1.062 \| good	13.084 \| good	0.185 \| good
2025-10-24T15:00:00.000Z	22 \| good	3.882 \| good	16.748 \| good	13.043 \| good	1.095 \| good	13.285 \| good	0.191 \| good
2025-10-24T16:00:00.000Z	22 \| good	3.96 \| good	17.235 \| good	20.25 \| good	1.103 \| good	10.362 \| good	0.17 \| good
2025-10-24T17:00:00.000Z	27 \| good	4.858 \| good	21.252 \| good	25.652 \| good	1.11 \| good	7.438 \| good	0.149 \| good
2025-10-24T18:00:00.000Z	27 \| good	2.86 \| good	11.861 \| good	29.108 \| good	1.117 \| good	4.514 \| good	0.128 \| good
2025-10-24T19:00:00.000Z	29 \| good	2.365 \| good	10.099 \| good	30.964 \| good	1.044 \| good	3.87 \| good	0.123 \| good
2025-10-24T20:00:00.000Z	31 \| good	1.905 \| good	8.127 \| good	34.249 \| good	0.971 \| good	3.226 \| good	0.118 \| good
2025-10-24T21:00:00.000Z	32 \| good	1.734 \| good	7.115 \| good	34.739 \| good	0.898 \| good	2.581 \| good	0.113 \| good
2025-10-24T22:00:00.000Z	33 \| good	1.552 \| good	6.063 \| good	35.512 \| good	0.889 \| good	2.779 \| good	0.112 \| good
2025-10-24T23:00:00.000Z	33 \| good	1.284 \| good	5.146 \| good	35.96 \| good	0.88 \| good	2.978 \| good	0.111 \| good
2025-10-25T00:00:00.000Z	38 \| good	6.955 \| good	9.601 \| good	38.071 \| good	0.856 \| good	3.112 \| good	0.109 \| good
2025-10-25T01:00:00.000Z	26 \| good	1.226 \| good	4.811 \| good	27.541 \| good	0.951 \| good	6.62 \| good	0.127 \| good

Live air quality index in Palo Alto, California today

Major air pollutants in Palo Alto, California

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Air quality in nearby cities

Stanford, California

East Palo Alto, California

Menlo Park, California

North Fair Oaks, California

Los Altos, California

Mountain View City, California

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Frequently asked questions

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What is the PM2.5 level in Palo Alto, California at the moment?

What is the PM10 level in Palo Alto, California at the moment?

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

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

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

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

What is the PM₁₀ level in Palo Alto, California at the moment?

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

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

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