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

Currently, Menlo Park, California has a sulfur dioxide (SO2) concentration of 0.392 ppb.

What is the ozone (O3) level in Menlo Park, California at the moment?

The current ozone (O3) level in Menlo Park, California at the moment is 3.179 ppm.

What is the nitrogen dioxide (NO2) level in Menlo Park, California at the moment?

Nitrogen dioxide (NO2) level in Menlo Park, California at the moment is 14.027 ppb.

Live air quality index in Menlo Park, California today

Q: What is the PM2.5 level in Menlo Park, California at the moment?

PM2.5 levels in Menlo Park, California are currently 18.984 μg/m3.

Q: What is the PM10 level in Menlo Park, California at the moment?

The PM10 concentration in Menlo Park, California is 75.156 μg/m3 at the moment.

Stay updated with real-time air quality in Menlo Park, 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

Menlo Park, California

Last updated: ... (Local time)

Major air pollutants in Menlo Park, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

18.98 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

75.16 μg/m³

155

255

425

605+

Ozone (O₃)

3.18 ppb

201

201+

Sulfur Dioxide (SO₂)

0.39 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

14.03 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.70 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Menlo Park, California

Get Live Pollen Counts

Menlo Park, California

Scroll To Air Quality Map

Track live Menlo Park, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-05T09:00:00.000Z	58 \| moderate	12.855 \| fine	54.993 \| good	4.49 \| good	0.446 \| good	15.13 \| good	0.379 \| good
2025-12-05T10:00:00.000Z	56 \| moderate	11.674 \| good	51.661 \| good	4.539 \| good	0.431 \| good	13.072 \| good	0.296 \| good
2025-12-05T11:00:00.000Z	54 \| moderate	10.854 \| good	48.748 \| good	8.933 \| good	0.432 \| good	12.831 \| good	0.275 \| good
2025-12-05T12:00:00.000Z	52 \| moderate	9.771 \| good	41.165 \| good	4.5 \| good	0.471 \| good	13.009 \| good	0.275 \| good
2025-12-05T13:00:00.000Z	52 \| moderate	9.883 \| good	41.22 \| good	4.336 \| good	0.631 \| good	12.804 \| good	0.27 \| good
2025-12-05T14:00:00.000Z	49 \| good	9.17 \| good	38.591 \| good	5.293 \| good	0.438 \| good	14.358 \| good	0.333 \| good
2025-12-05T15:00:00.000Z	49 \| good	9.452 \| good	40.298 \| good	4.488 \| good	0.464 \| good	14.883 \| good	0.573 \| good
2025-12-05T16:00:00.000Z	49 \| good	8.727 \| good	40.689 \| good	6.942 \| good	0.452 \| good	16.658 \| good	0.844 \| good
2025-12-05T17:00:00.000Z	44 \| good	8.293 \| good	36.974 \| good	6.68 \| good	0.442 \| good	17.894 \| good	0.655 \| good
2025-12-05T18:00:00.000Z	44 \| good	7.795 \| good	35.016 \| good	8.977 \| good	0.473 \| good	13.344 \| good	0.451 \| good
2025-12-05T19:00:00.000Z	44 \| good	8.07 \| good	35.34 \| good	9.123 \| good	0.489 \| good	12.914 \| good	0.425 \| good
2025-12-05T20:00:00.000Z	62 \| moderate	14.881 \| fine	58.439 \| fine	8.406 \| good	0.442 \| good	11.638 \| good	0.327 \| good
2025-12-05T21:00:00.000Z	62 \| moderate	14.839 \| fine	66.2 \| fine	12.52 \| good	0.421 \| good	12.633 \| good	0.325 \| good
2025-12-05T22:00:00.000Z	66 \| moderate	16.703 \| fine	64.809 \| fine	14.451 \| good	0.555 \| good	10.621 \| good	0.235 \| good
2025-12-05T23:00:00.000Z	81 \| moderate	24.527 \| fine	114.993 \| fine	15.227 \| good	0.503 \| good	10.324 \| good	0.225 \| good
2025-12-06T00:00:00.000Z	66 \| moderate	16.726 \| fine	79.051 \| fine	13.488 \| good	0.489 \| good	11.443 \| good	0.223 \| good
2025-12-06T01:00:00.000Z	62 \| moderate	14.828 \| fine	64.893 \| fine	13.162 \| good	0.457 \| good	13.325 \| good	0.226 \| good
2025-12-06T02:00:00.000Z	67 \| moderate	18.41 \| fine	69.456 \| fine	10.459 \| good	0.439 \| good	15.253 \| good	0.315 \| good
2025-12-06T03:00:00.000Z	69 \| moderate	19.195 \| fine	82.16 \| fine	8.328 \| good	0.408 \| good	20.628 \| good	0.491 \| good
2025-12-06T04:00:00.000Z	75 \| moderate	21.506 \| fine	71.066 \| fine	8.493 \| good	0.428 \| good	20.609 \| good	0.577 \| good
2025-12-06T05:00:00.000Z	75 \| moderate	21.703 \| fine	93.487 \| fine	4.136 \| good	0.462 \| good	20.766 \| good	0.755 \| good
2025-12-06T06:00:00.000Z	73 \| moderate	20.667 \| fine	84.57 \| fine	2.369 \| good	0.454 \| good	19.483 \| good	0.856 \| good
2025-12-06T07:00:00.000Z	69 \| moderate	18.93 \| fine	68.655 \| fine	2.237 \| good	0.477 \| good	19.428 \| good	0.861 \| good
2025-12-06T08:00:00.000Z	73 \| moderate	21.199 \| fine	81.534 \| fine	2.486 \| good	0.422 \| good	17.288 \| good	0.611 \| good
2025-12-06T09:00:00.000Z	75 \| moderate	21.66 \| fine	85.332 \| fine	2.586 \| good	0.43 \| good	17.311 \| good	0.61 \| good
2025-12-06T10:00:00.000Z	73 \| moderate	21.241 \| fine	87.112 \| fine	2.959 \| good	0.909 \| good	8.093 \| good	0.43 \| good
2025-12-06T11:00:00.000Z	66 \| moderate	17.196 \| fine	54.631 \| good	3.113 \| good	0.851 \| good	7.906 \| good	0.381 \| good
2025-12-06T12:00:00.000Z	67 \| moderate	18.048 \| fine	86.103 \| fine	4.997 \| good	0.358 \| good	8.916 \| good	0.362 \| good
2025-12-06T13:00:00.000Z	66 \| moderate	16.536 \| fine	73.828 \| fine	2.248 \| good	0.383 \| good	12.618 \| good	0.341 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	13.981 \| fine	53.944 \| good	3.302 \| good	0.511 \| good	9.196 \| good	0.264 \| good
2025-12-06T15:00:00.000Z	58 \| moderate	12.664 \| fine	44.984 \| good	4.662 \| good	0.404 \| good	9.297 \| good	0.274 \| good
2025-12-06T16:00:00.000Z	66 \| moderate	17.36 \| fine	74.693 \| fine	6.079 \| good	0.377 \| good	7.599 \| good	0.25 \| good
2025-12-06T17:00:00.000Z	64 \| moderate	15.772 \| fine	75.939 \| fine	10.265 \| good	0.43 \| good	8.025 \| good	0.232 \| good
2025-12-06T18:00:00.000Z	62 \| moderate	15.452 \| fine	55.605 \| fine	10.265 \| good	0.495 \| good	6.643 \| good	0.228 \| good
2025-12-06T19:00:00.000Z	62 \| moderate	14.589 \| fine	68.626 \| fine	11.269 \| good	0.511 \| good	6.569 \| good	0.227 \| good
2025-12-06T20:00:00.000Z	56 \| moderate	11.715 \| good	31.307 \| good	10.577 \| good	0.539 \| good	5.471 \| good	0.225 \| good
2025-12-06T21:00:00.000Z	62 \| moderate	15.292 \| fine	64.848 \| fine	12.285 \| good	0.646 \| good	6.096 \| good	0.229 \| good
2025-12-06T22:00:00.000Z	66 \| moderate	16.855 \| fine	69.098 \| fine	12.456 \| good	0.663 \| good	6.095 \| good	0.228 \| good
2025-12-06T23:00:00.000Z	69 \| moderate	18.847 \| fine	67.255 \| fine	12.654 \| good	0.585 \| good	6.011 \| good	0.226 \| good
2025-12-07T00:00:00.000Z	66 \| moderate	16.758 \| fine	70.377 \| fine	12.623 \| good	0.492 \| good	9.117 \| good	0.225 \| good
2025-12-07T01:00:00.000Z	64 \| moderate	15.762 \| fine	66.958 \| fine	12.758 \| good	0.453 \| good	10.596 \| good	0.221 \| good
2025-12-07T02:00:00.000Z	73 \| moderate	20.932 \| fine	71.524 \| fine	10.88 \| good	0.417 \| good	9.836 \| good	0.23 \| good
2025-12-07T03:00:00.000Z	67 \| moderate	18.28 \| fine	56.535 \| fine	8.077 \| good	0.437 \| good	11.758 \| good	0.311 \| good
2025-12-07T04:00:00.000Z	67 \| moderate	17.743 \| fine	63.069 \| fine	7.994 \| good	0.406 \| good	16.17 \| good	0.563 \| good
2025-12-07T05:00:00.000Z	62 \| moderate	15.068 \| fine	70.058 \| fine	6.898 \| good	0.434 \| good	16.062 \| good	0.652 \| good
2025-12-07T06:00:00.000Z	66 \| moderate	17.02 \| fine	67.662 \| fine	5.097 \| good	0.435 \| good	14.043 \| good	0.677 \| good
2025-12-07T07:00:00.000Z	69 \| moderate	18.944 \| fine	75.762 \| fine	3.436 \| good	0.398 \| good	13.664 \| good	0.694 \| good
2025-12-07T08:00:00.000Z	69 \| moderate	18.984 \| fine	75.156 \| fine	3.179 \| good	0.392 \| good	14.027 \| good	0.696 \| good
2025-12-07T09:00:00.000Z	60 \| moderate	13.76 \| fine	61.915 \| fine	4.156 \| good	2.085 \| good	20.36 \| good	0.416 \| good
2025-12-07T10:00:00.000Z	54 \| moderate	11.342 \| good	50.032 \| good	4.135 \| good	1.913 \| good	19.692 \| good	0.398 \| good
2025-12-07T11:00:00.000Z	54 \| moderate	10.933 \| good	48.747 \| good	3.76 \| good	1.741 \| good	19.024 \| good	0.38 \| good
2025-12-07T12:00:00.000Z	54 \| moderate	10.95 \| good	48.727 \| good	3.461 \| good	1.568 \| good	18.356 \| good	0.362 \| good
2025-12-07T13:00:00.000Z	52 \| moderate	10.315 \| good	45.534 \| good	3.166 \| good	1.578 \| good	18.597 \| good	0.359 \| good
2025-12-07T14:00:00.000Z	56 \| moderate	12.449 \| fine	55.373 \| fine	3.298 \| good	1.588 \| good	18.838 \| good	0.356 \| good
2025-12-07T15:00:00.000Z	56 \| moderate	11.78 \| good	52.854 \| good	3.179 \| good	1.598 \| good	19.08 \| good	0.354 \| good
2025-12-07T16:00:00.000Z	64 \| moderate	15.574 \| fine	69.146 \| fine	4.377 \| good	1.828 \| good	17.884 \| good	0.346 \| good
2025-12-07T17:00:00.000Z	60 \| moderate	13.707 \| fine	61.397 \| fine	9.122 \| good	2.059 \| good	16.689 \| good	0.338 \| good
2025-12-07T18:00:00.000Z	60 \| moderate	13.544 \| fine	60.65 \| fine	13.789 \| good	2.289 \| good	15.494 \| good	0.331 \| good
2025-12-07T19:00:00.000Z	60 \| moderate	13.896 \| fine	61.87 \| fine	15.756 \| good	2.473 \| good	13.937 \| good	0.286 \| good
2025-12-07T20:00:00.000Z	56 \| moderate	12.272 \| fine	55.368 \| fine	16.468 \| good	2.656 \| good	12.379 \| good	0.24 \| good
2025-12-07T21:00:00.000Z	62 \| moderate	15.098 \| fine	67.313 \| fine	17.472 \| good	2.84 \| good	10.822 \| good	0.195 \| good
2025-12-07T22:00:00.000Z	64 \| moderate	15.753 \| fine	70.128 \| fine	19.027 \| good	2.715 \| good	12.288 \| good	0.196 \| good
2025-12-07T23:00:00.000Z	62 \| moderate	14.718 \| fine	65.748 \| fine	13.803 \| good	2.589 \| good	13.755 \| good	0.197 \| good
2025-12-08T00:00:00.000Z	54 \| moderate	10.893 \| good	48.34 \| good	10.711 \| good	2.464 \| good	15.221 \| good	0.198 \| good
2025-12-08T01:00:00.000Z	44 \| good	8.194 \| good	36.343 \| good	7.435 \| good	2.421 \| good	17.561 \| good	0.232 \| good
2025-12-08T02:00:00.000Z	49 \| good	8.678 \| good	38.761 \| good	4.29 \| good	2.379 \| good	19.901 \| good	0.267 \| good
2025-12-08T03:00:00.000Z	38 \| good	7.454 \| good	33.007 \| good	6.259 \| good	2.337 \| good	22.24 \| good	0.302 \| good
2025-12-08T04:00:00.000Z	52 \| moderate	10.259 \| good	45.17 \| good	5.106 \| good	2.515 \| good	22.534 \| good	0.31 \| good
2025-12-08T05:00:00.000Z	49 \| good	8.961 \| good	39.385 \| good	4.231 \| good	2.692 \| good	22.829 \| good	0.318 \| good
2025-12-08T06:00:00.000Z	49 \| good	9.145 \| good	40.376 \| good	4.475 \| good	2.87 \| good	23.123 \| good	0.326 \| good
2025-12-08T07:00:00.000Z	44 \| good	7.597 \| good	33.32 \| good	4.339 \| good	2.731 \| good	22.288 \| good	0.323 \| good
2025-12-08T08:00:00.000Z	38 \| good	7.152 \| good	31.484 \| good	4.804 \| good	2.592 \| good	21.453 \| good	0.319 \| good
2025-12-08T09:00:00.000Z	38 \| good	7.135 \| good	31.66 \| good	4.655 \| good	2.453 \| good	20.618 \| good	0.316 \| good
2025-12-08T10:00:00.000Z	33 \| good	5.508 \| good	23.747 \| good	4.477 \| good	2.365 \| good	20.031 \| good	0.301 \| good
2025-12-08T11:00:00.000Z	38 \| good	6.524 \| good	28.785 \| good	3.856 \| good	2.277 \| good	19.445 \| good	0.286 \| good
2025-12-08T12:00:00.000Z	49 \| good	8.56 \| good	37.401 \| good	3.602 \| good	2.189 \| good	18.858 \| good	0.271 \| good
2025-12-08T13:00:00.000Z	44 \| good	7.625 \| good	33.65 \| good	2.891 \| good	2.088 \| good	18.517 \| good	0.279 \| good
2025-12-08T14:00:00.000Z	54 \| moderate	11.293 \| good	50.304 \| good	2.494 \| good	1.986 \| good	18.176 \| good	0.288 \| good
2025-12-08T15:00:00.000Z	56 \| moderate	12.034 \| good	54.238 \| good	2.188 \| good	1.885 \| good	17.834 \| good	0.296 \| good
2025-12-08T16:00:00.000Z	60 \| moderate	14.366 \| fine	64.333 \| fine	1.966 \| good	2.101 \| good	16.93 \| good	0.307 \| good
2025-12-08T17:00:00.000Z	64 \| moderate	15.784 \| fine	70.321 \| fine	6.638 \| good	2.317 \| good	16.026 \| good	0.318 \| good
2025-12-08T18:00:00.000Z	60 \| moderate	14.13 \| fine	63.035 \| fine	8.11 \| good	2.533 \| good	15.122 \| good	0.329 \| good
2025-12-08T19:00:00.000Z	60 \| moderate	14.125 \| fine	63.551 \| fine	10.407 \| good	2.772 \| good	14.257 \| good	0.288 \| good
2025-12-08T20:00:00.000Z	58 \| moderate	13.095 \| fine	58.452 \| fine	14.059 \| good	3.011 \| good	13.393 \| good	0.247 \| good
2025-12-08T21:00:00.000Z	60 \| moderate	14.011 \| fine	62.483 \| fine	15.394 \| good	3.25 \| good	12.528 \| good	0.205 \| good
2025-12-08T22:00:00.000Z	62 \| moderate	14.682 \| fine	65.676 \| fine	15.704 \| good	3.117 \| good	13.71 \| good	0.207 \| good
2025-12-08T23:00:00.000Z	58 \| moderate	12.733 \| fine	57.212 \| fine	11.141 \| good	2.985 \| good	14.893 \| good	0.208 \| good
2025-12-09T00:00:00.000Z	49 \| good	9.114 \| good	40.882 \| good	10.619 \| good	2.852 \| good	16.075 \| good	0.209 \| good
2025-12-09T01:00:00.000Z	38 \| good	6.838 \| good	29.97 \| good	7.597 \| good	2.925 \| good	18.906 \| good	0.263 \| good
2025-12-09T02:00:00.000Z	49 \| good	8.851 \| good	39.127 \| good	4.047 \| good	2.998 \| good	21.737 \| good	0.317 \| good
2025-12-09T03:00:00.000Z	33 \| good	6.183 \| good	27.552 \| good	10.139 \| good	3.071 \| good	24.568 \| good	0.371 \| good
2025-12-09T04:00:00.000Z	49 \| good	8.625 \| good	38.344 \| good	10.526 \| good	3.199 \| good	24.32 \| good	0.373 \| good
2025-12-09T05:00:00.000Z	38 \| good	7.387 \| good	32.221 \| good	11.228 \| good	3.327 \| good	24.072 \| good	0.376 \| good
2025-12-09T06:00:00.000Z	84 \| moderate	27.217 \| fine	29.666 \| good	7.7 \| good	3.38 \| good	23.507 \| good	0.371 \| good
2025-12-09T07:00:00.000Z	33 \| good	5.531 \| good	24.896 \| good	12.998 \| good	3.242 \| good	22.908 \| good	0.366 \| good
2025-12-09T08:00:00.000Z	33 \| good	5.608 \| good	24.967 \| good	15.239 \| good	3.029 \| good	21.991 \| good	0.352 \| good

Menlo Park

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

0.66ppm

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 Menlo Park, California?

The air quality information for Menlo Park, California is updated every hour for accuracy.

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

In the past 24 hours, the air quality in Menlo Park, California was at its worst at 09:00:00 on 2025-12-06.

When did Menlo Park, California experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Menlo Park, California was observed at 08:00:00 on 2025-12-06.

What is the AQI in Menlo Park, California right now?

As of now, the AQI in Menlo Park, California is 69, indicating Moderate conditions.

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

Menlo Park, California air has the highest levels of PM2.5.

What should I do in case of poor air quality in Menlo Park, California?

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

What is the PM_2.5 level in Menlo Park, California at the moment?

PM_2.5 levels in Menlo Park, California are currently 18.984 μg/m³.

What is the PM₁₀ level in Menlo Park, California at the moment?

The PM₁₀ concentration in Menlo Park, California is 75.156 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Menlo Park, California at the moment?

The current carbon monoxide (CO) concentration in Menlo Park, California is 0.696 ppm.

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

Currently, Menlo Park, California has a sulfur dioxide (SO₂) concentration of 0.392 ppb.

What is the ozone (O₃) level in Menlo Park, California at the moment?

The current ozone (O₃) level in Menlo Park, California at the moment is 3.179 ppm.

What is the nitrogen dioxide (NO₂) level in Menlo Park, California at the moment?

Nitrogen dioxide (NO₂) level in Menlo Park, California at the moment is 14.027 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-05T09:00:00.000Z	58 \| moderate	12.855 \| fine	54.993 \| good	4.49 \| good	0.446 \| good	15.13 \| good	0.379 \| good
2025-12-05T10:00:00.000Z	56 \| moderate	11.674 \| good	51.661 \| good	4.539 \| good	0.431 \| good	13.072 \| good	0.296 \| good
2025-12-05T11:00:00.000Z	54 \| moderate	10.854 \| good	48.748 \| good	8.933 \| good	0.432 \| good	12.831 \| good	0.275 \| good
2025-12-05T12:00:00.000Z	52 \| moderate	9.771 \| good	41.165 \| good	4.5 \| good	0.471 \| good	13.009 \| good	0.275 \| good
2025-12-05T13:00:00.000Z	52 \| moderate	9.883 \| good	41.22 \| good	4.336 \| good	0.631 \| good	12.804 \| good	0.27 \| good
2025-12-05T14:00:00.000Z	49 \| good	9.17 \| good	38.591 \| good	5.293 \| good	0.438 \| good	14.358 \| good	0.333 \| good
2025-12-05T15:00:00.000Z	49 \| good	9.452 \| good	40.298 \| good	4.488 \| good	0.464 \| good	14.883 \| good	0.573 \| good
2025-12-05T16:00:00.000Z	49 \| good	8.727 \| good	40.689 \| good	6.942 \| good	0.452 \| good	16.658 \| good	0.844 \| good
2025-12-05T17:00:00.000Z	44 \| good	8.293 \| good	36.974 \| good	6.68 \| good	0.442 \| good	17.894 \| good	0.655 \| good
2025-12-05T18:00:00.000Z	44 \| good	7.795 \| good	35.016 \| good	8.977 \| good	0.473 \| good	13.344 \| good	0.451 \| good
2025-12-05T19:00:00.000Z	44 \| good	8.07 \| good	35.34 \| good	9.123 \| good	0.489 \| good	12.914 \| good	0.425 \| good
2025-12-05T20:00:00.000Z	62 \| moderate	14.881 \| fine	58.439 \| fine	8.406 \| good	0.442 \| good	11.638 \| good	0.327 \| good
2025-12-05T21:00:00.000Z	62 \| moderate	14.839 \| fine	66.2 \| fine	12.52 \| good	0.421 \| good	12.633 \| good	0.325 \| good
2025-12-05T22:00:00.000Z	66 \| moderate	16.703 \| fine	64.809 \| fine	14.451 \| good	0.555 \| good	10.621 \| good	0.235 \| good
2025-12-05T23:00:00.000Z	81 \| moderate	24.527 \| fine	114.993 \| fine	15.227 \| good	0.503 \| good	10.324 \| good	0.225 \| good
2025-12-06T00:00:00.000Z	66 \| moderate	16.726 \| fine	79.051 \| fine	13.488 \| good	0.489 \| good	11.443 \| good	0.223 \| good
2025-12-06T01:00:00.000Z	62 \| moderate	14.828 \| fine	64.893 \| fine	13.162 \| good	0.457 \| good	13.325 \| good	0.226 \| good
2025-12-06T02:00:00.000Z	67 \| moderate	18.41 \| fine	69.456 \| fine	10.459 \| good	0.439 \| good	15.253 \| good	0.315 \| good
2025-12-06T03:00:00.000Z	69 \| moderate	19.195 \| fine	82.16 \| fine	8.328 \| good	0.408 \| good	20.628 \| good	0.491 \| good
2025-12-06T04:00:00.000Z	75 \| moderate	21.506 \| fine	71.066 \| fine	8.493 \| good	0.428 \| good	20.609 \| good	0.577 \| good
2025-12-06T05:00:00.000Z	75 \| moderate	21.703 \| fine	93.487 \| fine	4.136 \| good	0.462 \| good	20.766 \| good	0.755 \| good
2025-12-06T06:00:00.000Z	73 \| moderate	20.667 \| fine	84.57 \| fine	2.369 \| good	0.454 \| good	19.483 \| good	0.856 \| good
2025-12-06T07:00:00.000Z	69 \| moderate	18.93 \| fine	68.655 \| fine	2.237 \| good	0.477 \| good	19.428 \| good	0.861 \| good
2025-12-06T08:00:00.000Z	73 \| moderate	21.199 \| fine	81.534 \| fine	2.486 \| good	0.422 \| good	17.288 \| good	0.611 \| good
2025-12-06T09:00:00.000Z	75 \| moderate	21.66 \| fine	85.332 \| fine	2.586 \| good	0.43 \| good	17.311 \| good	0.61 \| good
2025-12-06T10:00:00.000Z	73 \| moderate	21.241 \| fine	87.112 \| fine	2.959 \| good	0.909 \| good	8.093 \| good	0.43 \| good
2025-12-06T11:00:00.000Z	66 \| moderate	17.196 \| fine	54.631 \| good	3.113 \| good	0.851 \| good	7.906 \| good	0.381 \| good
2025-12-06T12:00:00.000Z	67 \| moderate	18.048 \| fine	86.103 \| fine	4.997 \| good	0.358 \| good	8.916 \| good	0.362 \| good
2025-12-06T13:00:00.000Z	66 \| moderate	16.536 \| fine	73.828 \| fine	2.248 \| good	0.383 \| good	12.618 \| good	0.341 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	13.981 \| fine	53.944 \| good	3.302 \| good	0.511 \| good	9.196 \| good	0.264 \| good
2025-12-06T15:00:00.000Z	58 \| moderate	12.664 \| fine	44.984 \| good	4.662 \| good	0.404 \| good	9.297 \| good	0.274 \| good
2025-12-06T16:00:00.000Z	66 \| moderate	17.36 \| fine	74.693 \| fine	6.079 \| good	0.377 \| good	7.599 \| good	0.25 \| good
2025-12-06T17:00:00.000Z	64 \| moderate	15.772 \| fine	75.939 \| fine	10.265 \| good	0.43 \| good	8.025 \| good	0.232 \| good
2025-12-06T18:00:00.000Z	62 \| moderate	15.452 \| fine	55.605 \| fine	10.265 \| good	0.495 \| good	6.643 \| good	0.228 \| good
2025-12-06T19:00:00.000Z	62 \| moderate	14.589 \| fine	68.626 \| fine	11.269 \| good	0.511 \| good	6.569 \| good	0.227 \| good
2025-12-06T20:00:00.000Z	56 \| moderate	11.715 \| good	31.307 \| good	10.577 \| good	0.539 \| good	5.471 \| good	0.225 \| good
2025-12-06T21:00:00.000Z	62 \| moderate	15.292 \| fine	64.848 \| fine	12.285 \| good	0.646 \| good	6.096 \| good	0.229 \| good
2025-12-06T22:00:00.000Z	66 \| moderate	16.855 \| fine	69.098 \| fine	12.456 \| good	0.663 \| good	6.095 \| good	0.228 \| good
2025-12-06T23:00:00.000Z	69 \| moderate	18.847 \| fine	67.255 \| fine	12.654 \| good	0.585 \| good	6.011 \| good	0.226 \| good
2025-12-07T00:00:00.000Z	66 \| moderate	16.758 \| fine	70.377 \| fine	12.623 \| good	0.492 \| good	9.117 \| good	0.225 \| good
2025-12-07T01:00:00.000Z	64 \| moderate	15.762 \| fine	66.958 \| fine	12.758 \| good	0.453 \| good	10.596 \| good	0.221 \| good
2025-12-07T02:00:00.000Z	73 \| moderate	20.932 \| fine	71.524 \| fine	10.88 \| good	0.417 \| good	9.836 \| good	0.23 \| good
2025-12-07T03:00:00.000Z	67 \| moderate	18.28 \| fine	56.535 \| fine	8.077 \| good	0.437 \| good	11.758 \| good	0.311 \| good
2025-12-07T04:00:00.000Z	67 \| moderate	17.743 \| fine	63.069 \| fine	7.994 \| good	0.406 \| good	16.17 \| good	0.563 \| good
2025-12-07T05:00:00.000Z	62 \| moderate	15.068 \| fine	70.058 \| fine	6.898 \| good	0.434 \| good	16.062 \| good	0.652 \| good
2025-12-07T06:00:00.000Z	66 \| moderate	17.02 \| fine	67.662 \| fine	5.097 \| good	0.435 \| good	14.043 \| good	0.677 \| good
2025-12-07T07:00:00.000Z	69 \| moderate	18.944 \| fine	75.762 \| fine	3.436 \| good	0.398 \| good	13.664 \| good	0.694 \| good
2025-12-07T08:00:00.000Z	69 \| moderate	18.984 \| fine	75.156 \| fine	3.179 \| good	0.392 \| good	14.027 \| good	0.696 \| good
2025-12-07T09:00:00.000Z	60 \| moderate	13.76 \| fine	61.915 \| fine	4.156 \| good	2.085 \| good	20.36 \| good	0.416 \| good
2025-12-07T10:00:00.000Z	54 \| moderate	11.342 \| good	50.032 \| good	4.135 \| good	1.913 \| good	19.692 \| good	0.398 \| good
2025-12-07T11:00:00.000Z	54 \| moderate	10.933 \| good	48.747 \| good	3.76 \| good	1.741 \| good	19.024 \| good	0.38 \| good
2025-12-07T12:00:00.000Z	54 \| moderate	10.95 \| good	48.727 \| good	3.461 \| good	1.568 \| good	18.356 \| good	0.362 \| good
2025-12-07T13:00:00.000Z	52 \| moderate	10.315 \| good	45.534 \| good	3.166 \| good	1.578 \| good	18.597 \| good	0.359 \| good
2025-12-07T14:00:00.000Z	56 \| moderate	12.449 \| fine	55.373 \| fine	3.298 \| good	1.588 \| good	18.838 \| good	0.356 \| good
2025-12-07T15:00:00.000Z	56 \| moderate	11.78 \| good	52.854 \| good	3.179 \| good	1.598 \| good	19.08 \| good	0.354 \| good
2025-12-07T16:00:00.000Z	64 \| moderate	15.574 \| fine	69.146 \| fine	4.377 \| good	1.828 \| good	17.884 \| good	0.346 \| good
2025-12-07T17:00:00.000Z	60 \| moderate	13.707 \| fine	61.397 \| fine	9.122 \| good	2.059 \| good	16.689 \| good	0.338 \| good
2025-12-07T18:00:00.000Z	60 \| moderate	13.544 \| fine	60.65 \| fine	13.789 \| good	2.289 \| good	15.494 \| good	0.331 \| good
2025-12-07T19:00:00.000Z	60 \| moderate	13.896 \| fine	61.87 \| fine	15.756 \| good	2.473 \| good	13.937 \| good	0.286 \| good
2025-12-07T20:00:00.000Z	56 \| moderate	12.272 \| fine	55.368 \| fine	16.468 \| good	2.656 \| good	12.379 \| good	0.24 \| good
2025-12-07T21:00:00.000Z	62 \| moderate	15.098 \| fine	67.313 \| fine	17.472 \| good	2.84 \| good	10.822 \| good	0.195 \| good
2025-12-07T22:00:00.000Z	64 \| moderate	15.753 \| fine	70.128 \| fine	19.027 \| good	2.715 \| good	12.288 \| good	0.196 \| good
2025-12-07T23:00:00.000Z	62 \| moderate	14.718 \| fine	65.748 \| fine	13.803 \| good	2.589 \| good	13.755 \| good	0.197 \| good
2025-12-08T00:00:00.000Z	54 \| moderate	10.893 \| good	48.34 \| good	10.711 \| good	2.464 \| good	15.221 \| good	0.198 \| good
2025-12-08T01:00:00.000Z	44 \| good	8.194 \| good	36.343 \| good	7.435 \| good	2.421 \| good	17.561 \| good	0.232 \| good
2025-12-08T02:00:00.000Z	49 \| good	8.678 \| good	38.761 \| good	4.29 \| good	2.379 \| good	19.901 \| good	0.267 \| good
2025-12-08T03:00:00.000Z	38 \| good	7.454 \| good	33.007 \| good	6.259 \| good	2.337 \| good	22.24 \| good	0.302 \| good
2025-12-08T04:00:00.000Z	52 \| moderate	10.259 \| good	45.17 \| good	5.106 \| good	2.515 \| good	22.534 \| good	0.31 \| good
2025-12-08T05:00:00.000Z	49 \| good	8.961 \| good	39.385 \| good	4.231 \| good	2.692 \| good	22.829 \| good	0.318 \| good
2025-12-08T06:00:00.000Z	49 \| good	9.145 \| good	40.376 \| good	4.475 \| good	2.87 \| good	23.123 \| good	0.326 \| good
2025-12-08T07:00:00.000Z	44 \| good	7.597 \| good	33.32 \| good	4.339 \| good	2.731 \| good	22.288 \| good	0.323 \| good
2025-12-08T08:00:00.000Z	38 \| good	7.152 \| good	31.484 \| good	4.804 \| good	2.592 \| good	21.453 \| good	0.319 \| good
2025-12-08T09:00:00.000Z	38 \| good	7.135 \| good	31.66 \| good	4.655 \| good	2.453 \| good	20.618 \| good	0.316 \| good
2025-12-08T10:00:00.000Z	33 \| good	5.508 \| good	23.747 \| good	4.477 \| good	2.365 \| good	20.031 \| good	0.301 \| good
2025-12-08T11:00:00.000Z	38 \| good	6.524 \| good	28.785 \| good	3.856 \| good	2.277 \| good	19.445 \| good	0.286 \| good
2025-12-08T12:00:00.000Z	49 \| good	8.56 \| good	37.401 \| good	3.602 \| good	2.189 \| good	18.858 \| good	0.271 \| good
2025-12-08T13:00:00.000Z	44 \| good	7.625 \| good	33.65 \| good	2.891 \| good	2.088 \| good	18.517 \| good	0.279 \| good
2025-12-08T14:00:00.000Z	54 \| moderate	11.293 \| good	50.304 \| good	2.494 \| good	1.986 \| good	18.176 \| good	0.288 \| good
2025-12-08T15:00:00.000Z	56 \| moderate	12.034 \| good	54.238 \| good	2.188 \| good	1.885 \| good	17.834 \| good	0.296 \| good
2025-12-08T16:00:00.000Z	60 \| moderate	14.366 \| fine	64.333 \| fine	1.966 \| good	2.101 \| good	16.93 \| good	0.307 \| good
2025-12-08T17:00:00.000Z	64 \| moderate	15.784 \| fine	70.321 \| fine	6.638 \| good	2.317 \| good	16.026 \| good	0.318 \| good
2025-12-08T18:00:00.000Z	60 \| moderate	14.13 \| fine	63.035 \| fine	8.11 \| good	2.533 \| good	15.122 \| good	0.329 \| good
2025-12-08T19:00:00.000Z	60 \| moderate	14.125 \| fine	63.551 \| fine	10.407 \| good	2.772 \| good	14.257 \| good	0.288 \| good
2025-12-08T20:00:00.000Z	58 \| moderate	13.095 \| fine	58.452 \| fine	14.059 \| good	3.011 \| good	13.393 \| good	0.247 \| good
2025-12-08T21:00:00.000Z	60 \| moderate	14.011 \| fine	62.483 \| fine	15.394 \| good	3.25 \| good	12.528 \| good	0.205 \| good
2025-12-08T22:00:00.000Z	62 \| moderate	14.682 \| fine	65.676 \| fine	15.704 \| good	3.117 \| good	13.71 \| good	0.207 \| good
2025-12-08T23:00:00.000Z	58 \| moderate	12.733 \| fine	57.212 \| fine	11.141 \| good	2.985 \| good	14.893 \| good	0.208 \| good
2025-12-09T00:00:00.000Z	49 \| good	9.114 \| good	40.882 \| good	10.619 \| good	2.852 \| good	16.075 \| good	0.209 \| good
2025-12-09T01:00:00.000Z	38 \| good	6.838 \| good	29.97 \| good	7.597 \| good	2.925 \| good	18.906 \| good	0.263 \| good
2025-12-09T02:00:00.000Z	49 \| good	8.851 \| good	39.127 \| good	4.047 \| good	2.998 \| good	21.737 \| good	0.317 \| good
2025-12-09T03:00:00.000Z	33 \| good	6.183 \| good	27.552 \| good	10.139 \| good	3.071 \| good	24.568 \| good	0.371 \| good
2025-12-09T04:00:00.000Z	49 \| good	8.625 \| good	38.344 \| good	10.526 \| good	3.199 \| good	24.32 \| good	0.373 \| good
2025-12-09T05:00:00.000Z	38 \| good	7.387 \| good	32.221 \| good	11.228 \| good	3.327 \| good	24.072 \| good	0.376 \| good
2025-12-09T06:00:00.000Z	84 \| moderate	27.217 \| fine	29.666 \| good	7.7 \| good	3.38 \| good	23.507 \| good	0.371 \| good
2025-12-09T07:00:00.000Z	33 \| good	5.531 \| good	24.896 \| good	12.998 \| good	3.242 \| good	22.908 \| good	0.366 \| good
2025-12-09T08:00:00.000Z	33 \| good	5.608 \| good	24.967 \| good	15.239 \| good	3.029 \| good	21.991 \| good	0.352 \| good

Live air quality index in Menlo Park, California today

Major air pollutants in Menlo Park, 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

North Fair Oaks, California

Stanford, California

Palo Alto, California

East Palo Alto, California

Redwood City, California

San Carlos, California

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Frequently asked questions

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

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What is the nitrogen dioxide (NO2) level in Menlo Park, 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 Menlo Park, California at the moment?

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

What is the ozone (O₃) level in Menlo Park, California at the moment?

What is the nitrogen dioxide (NO₂) level in Menlo Park, California at the moment?