What are the current PM10 levels at Redwood City, California?

The current PM10 levels in Redwood City, California are 51.009 μg/m3.

What are the current sulfur dioxide (SO2) levels at Redwood City, California?

The current sulfur dioxide (SO2) levels in Redwood City, California are 0.312 ppb.

What are the current ozone (O3) levels at Redwood City, California?

The current ozone (O3) levels at Redwood City, California is 29.015 ppm.

What are the current nitrogen dioxide (NO2) levels at Redwood City, California?

The current nitrogen dioxide (NO2) levels at Redwood City, California is 4.205 ppb.

Real-time air quality index in Redwood City, California today

Q: What are the current PM2.5 levels in Redwood City, California?

The measured PM2.5 levels in Redwood City, California at present are 11.401 μg/m3.

Stay updated with real-time air quality in Redwood City, 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

Redwood City, California

Last updated: ... (Local time)

Common air pollutants in Redwood City, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

11.40 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

51.01 μg/m³

155

255

425

605+

Ozone (O₃)

29.02 ppb

201

201+

Sulfur Dioxide (SO₂)

0.31 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.21 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.30 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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Redwood City, California

Scroll To Air Quality Map

Track live Redwood City, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-03-08T06:00:00.000Z	27 \| good	4.907 \| good	21.035 \| good	23.002 \| good	0.507 \| good	11.205 \| good	0.4 \| good
2026-03-08T07:00:00.000Z	27 \| good	4.909 \| good	21.031 \| good	17.015 \| good	0.467 \| good	11.211 \| good	0.4 \| good
2026-03-08T08:00:00.000Z	27 \| good	4.911 \| good	21.03 \| good	18.014 \| good	0.456 \| good	11.509 \| good	0.4 \| good
2026-03-08T09:00:00.000Z	27 \| good	4.909 \| good	21.027 \| good	18.009 \| good	0.483 \| good	11.51 \| good	0.4 \| good
2026-03-08T10:00:00.000Z	27 \| good	4.909 \| good	21.034 \| good	18.013 \| good	0.348 \| good	7.495 \| good	0.227 \| good
2026-03-08T11:00:00.000Z	33 \| good	6.297 \| good	13.246 \| good	18.006 \| good	0.379 \| good	11.041 \| good	0.2 \| good
2026-03-08T12:00:00.000Z	38 \| good	7.482 \| good	19.258 \| good	20.525 \| good	0.158 \| good	13.298 \| good	0.553 \| good
2026-03-08T13:00:00.000Z	11 \| good	1.813 \| good	8.057 \| good	11.015 \| good	0.427 \| good	8.511 \| good	0.4 \| good
2026-03-08T14:00:00.000Z	10 \| good	0.414 \| good	2.063 \| good	5.031 \| good	0.416 \| good	11.201 \| good	0.4 \| good
2026-03-08T15:00:00.000Z	11 \| good	0.715 \| good	3.061 \| good	8.018 \| good	0.47 \| good	12.1 \| good	0.4 \| good
2026-03-08T16:00:00.000Z	44 \| good	8.366 \| good	12.921 \| good	8.021 \| good	0.483 \| good	10.305 \| good	0.5 \| good
2026-03-08T17:00:00.000Z	27 \| good	5.404 \| good	23.013 \| good	8.025 \| good	0.848 \| good	9.502 \| good	0.5 \| good
2026-03-08T18:00:00.000Z	33 \| good	5.701 \| good	24.998 \| good	11.021 \| good	1.045 \| good	7.311 \| good	0.4 \| good
2026-03-08T19:00:00.000Z	33 \| good	5.801 \| good	25.003 \| good	16.014 \| good	1.064 \| good	5.711 \| good	0.4 \| good
2026-03-08T20:00:00.000Z	27 \| good	5.405 \| good	23.015 \| good	20.015 \| good	1.072 \| good	5.906 \| good	0.4 \| good
2026-03-08T21:00:00.000Z	27 \| good	5.206 \| good	23.019 \| good	20.021 \| good	0.86 \| good	6.501 \| good	0.4 \| good
2026-03-08T22:00:00.000Z	27 \| good	4.605 \| good	20.024 \| good	28.008 \| good	0.657 \| good	6.102 \| good	0.3 \| good
2026-03-08T23:00:00.000Z	27 \| good	5.302 \| good	23.012 \| good	28.018 \| good	0.604 \| good	5.607 \| good	0.3 \| good
2026-03-09T00:00:00.000Z	33 \| good	4.607 \| good	20.035 \| good	36.001 \| good	0.448 \| good	5.305 \| good	0.3 \| good
2026-03-09T01:00:00.000Z	31 \| good	2.812 \| good	12.055 \| good	34.01 \| good	0.464 \| good	5.701 \| good	0.3 \| good
2026-03-09T02:00:00.000Z	31 \| good	2.914 \| good	12.066 \| good	34.01 \| good	0.528 \| good	6.002 \| good	0.3 \| good
2026-03-09T03:00:00.000Z	56 \| moderate	12.054 \| good	54.865 \| good	34.627 \| good	1.863 \| good	22.323 \| good	0.258 \| good
2026-03-09T04:00:00.000Z	33 \| good	5.709 \| good	25.036 \| good	30.016 \| good	0.296 \| good	23.27 \| good	0.4 \| good
2026-03-09T05:00:00.000Z	49 \| good	8.802 \| good	39.008 \| good	24.023 \| good	0.428 \| good	17.084 \| good	0.4 \| good
2026-03-09T06:00:00.000Z	52 \| moderate	10.401 \| good	46.003 \| good	15.044 \| good	0.48 \| good	18.481 \| good	0.4 \| good
2026-03-09T07:00:00.000Z	52 \| moderate	10.399 \| good	45.999 \| good	15.038 \| good	0.471 \| good	18.479 \| good	0.4 \| good
2026-03-09T08:00:00.000Z	49 \| good	8.803 \| good	39.04 \| good	12.045 \| good	0.507 \| good	10.091 \| good	0.4 \| good
2026-03-09T09:00:00.000Z	44 \| good	8.404 \| good	37.033 \| good	11.039 \| good	0.429 \| good	9.093 \| good	0.4 \| good
2026-03-09T10:00:00.000Z	38 \| good	7.205 \| good	32.03 \| good	9.038 \| good	0.353 \| good	6.8 \| good	0.4 \| good
2026-03-09T11:00:00.000Z	33 \| good	6.106 \| good	27.025 \| good	8.03 \| good	0.316 \| good	7.4 \| good	0.4 \| good
2026-03-09T12:00:00.000Z	27 \| good	5.009 \| good	22.045 \| good	8.027 \| good	0.3 \| good	7.4 \| good	0.4 \| good
2026-03-09T13:00:00.000Z	27 \| good	5.006 \| good	22.034 \| good	8.022 \| good	0.498 \| good	7.401 \| good	0.4 \| good
2026-03-09T14:00:00.000Z	22 \| good	3.712 \| good	16.066 \| good	5.029 \| good	0.401 \| good	10.799 \| good	0.5 \| good
2026-03-09T15:00:00.000Z	27 \| good	5.308 \| good	23.026 \| good	5.024 \| good	0.333 \| good	14.695 \| good	0.7 \| good
2026-03-09T16:00:00.000Z	38 \| good	7.102 \| good	32.007 \| good	5.02 \| good	0.421 \| good	14.997 \| good	0.899 \| good
2026-03-09T17:00:00.000Z	49 \| good	8.999 \| good	40.991 \| good	11.009 \| good	0.383 \| good	6.416 \| good	0.4 \| good
2026-03-09T18:00:00.000Z	54 \| moderate	11.496 \| good	50.985 \| good	11.015 \| good	0.357 \| good	6.81 \| good	0.4 \| good
2026-03-09T19:00:00.000Z	56 \| moderate	11.703 \| good	52.014 \| good	19.001 \| good	0.424 \| good	8.405 \| good	0.4 \| good
2026-03-09T20:00:00.000Z	56 \| moderate	11.802 \| good	52.003 \| good	19.008 \| good	0.906 \| good	5.109 \| good	0.3 \| good
2026-03-09T21:00:00.000Z	54 \| moderate	11.403 \| good	51.017 \| good	26.994 \| good	0.642 \| good	7.3 \| good	0.3 \| good
2026-03-09T22:00:00.000Z	56 \| moderate	11.702 \| good	52.007 \| good	28.993 \| good	0.41 \| good	7.1 \| good	0.3 \| good
2026-03-09T23:00:00.000Z	58 \| moderate	12.793 \| fine	56.957 \| fine	28.993 \| good	0.638 \| good	4.406 \| good	0.3 \| good
2026-03-10T00:00:00.000Z	52 \| moderate	10.396 \| good	45.979 \| good	31.991 \| good	0.634 \| good	4.604 \| good	0.3 \| good
2026-03-10T01:00:00.000Z	49 \| good	8.704 \| good	38.022 \| good	27.008 \| good	0.616 \| good	4.602 \| good	0.3 \| good
2026-03-10T02:00:00.000Z	54 \| moderate	10.801 \| good	47.994 \| good	27.013 \| good	0.308 \| good	2.605 \| good	0.3 \| good
2026-03-10T03:00:00.000Z	34 \| good	4.725 \| good	20.518 \| good	37.336 \| good	1.317 \| good	13.165 \| good	0.19 \| good
2026-03-10T04:00:00.000Z	54 \| moderate	11.401 \| good	51.009 \| good	29.015 \| good	0.312 \| good	4.205 \| good	0.3 \| good
2026-03-10T05:00:00.000Z	54 \| moderate	11.401 \| good	51.009 \| good	29.015 \| good	0.312 \| good	4.205 \| good	0.3 \| good
2026-03-10T06:00:00.000Z	33 \| good	5.967 \| good	26.343 \| good	27.295 \| good	0.939 \| good	15.75 \| good	0.192 \| good
2026-03-10T07:00:00.000Z	35 \| good	2.783 \| good	11.354 \| good	37.834 \| good	0.869 \| good	14.459 \| good	0.187 \| good
2026-03-10T08:00:00.000Z	33 \| good	1.236 \| good	5.054 \| good	36.209 \| good	0.799 \| good	13.168 \| good	0.182 \| good
2026-03-10T09:00:00.000Z	31 \| good	1.51 \| good	6.095 \| good	33.235 \| good	0.729 \| good	11.877 \| good	0.177 \| good
2026-03-10T10:00:00.000Z	32 \| good	2.512 \| good	10.292 \| good	34.784 \| good	0.699 \| good	10.554 \| good	0.171 \| good
2026-03-10T11:00:00.000Z	31 \| good	2.177 \| good	9.062 \| good	33.595 \| good	0.67 \| good	9.231 \| good	0.164 \| good
2026-03-10T12:00:00.000Z	29 \| good	3.329 \| good	14.312 \| good	30.617 \| good	0.64 \| good	7.907 \| good	0.158 \| good
2026-03-10T13:00:00.000Z	26 \| good	3.154 \| good	13.564 \| good	28.463 \| good	0.659 \| good	8.386 \| good	0.163 \| good
2026-03-10T14:00:00.000Z	24 \| good	1.506 \| good	6.31 \| good	26.334 \| good	0.678 \| good	8.864 \| good	0.168 \| good
2026-03-10T15:00:00.000Z	26 \| good	2.741 \| good	11.604 \| good	27.555 \| good	0.697 \| good	9.343 \| good	0.172 \| good
2026-03-10T16:00:00.000Z	34 \| good	3.342 \| good	14.401 \| good	37.323 \| good	0.762 \| good	7.481 \| good	0.164 \| good
2026-03-10T17:00:00.000Z	34 \| good	1.522 \| good	6.025 \| good	37.148 \| good	0.828 \| good	5.618 \| good	0.155 \| good
2026-03-10T18:00:00.000Z	31 \| good	1.694 \| good	7.148 \| good	32.723 \| good	0.893 \| good	3.756 \| good	0.146 \| good
2026-03-10T19:00:00.000Z	31 \| good	2.492 \| good	10.065 \| good	34.07 \| good	0.901 \| good	3.469 \| good	0.145 \| good
2026-03-10T20:00:00.000Z	34 \| good	2.855 \| good	11.739 \| good	36.815 \| good	0.909 \| good	3.183 \| good	0.144 \| good
2026-03-10T21:00:00.000Z	34 \| good	3.877 \| good	17.106 \| good	37.373 \| good	0.918 \| good	2.896 \| good	0.142 \| good
2026-03-10T22:00:00.000Z	33 \| good	5.845 \| good	25.986 \| good	34.692 \| good	0.89 \| good	2.947 \| good	0.142 \| good
2026-03-10T23:00:00.000Z	31 \| good	5.324 \| good	22.674 \| good	34.315 \| good	0.862 \| good	2.998 \| good	0.141 \| good
2026-03-11T00:00:00.000Z	33 \| good	3.726 \| good	16.163 \| good	35.651 \| good	0.835 \| good	3.049 \| good	0.14 \| good
2026-03-11T01:00:00.000Z	35 \| good	1.912 \| good	7.984 \| good	37.822 \| good	0.837 \| good	6.069 \| good	0.155 \| good
2026-03-11T02:00:00.000Z	35 \| good	4.059 \| good	17.737 \| good	37.7 \| good	0.839 \| good	9.089 \| good	0.169 \| good
2026-03-11T03:00:00.000Z	30 \| good	4.748 \| good	20.722 \| good	31.928 \| good	0.842 \| good	12.11 \| good	0.183 \| good
2026-03-11T04:00:00.000Z	33 \| good	6.021 \| good	26.541 \| good	34.205 \| good	0.89 \| good	13.35 \| good	0.199 \| good
2026-03-11T05:00:00.000Z	27 \| good	5.368 \| good	23.086 \| good	29.07 \| good	0.938 \| good	14.591 \| good	0.214 \| good
2026-03-11T06:00:00.000Z	54 \| moderate	10.785 \| good	13.235 \| good	25.165 \| good	0.96 \| good	15.329 \| good	0.227 \| good
2026-03-11T07:00:00.000Z	27 \| good	5.061 \| good	21.999 \| good	23.71 \| good	0.987 \| good	15.803 \| good	0.232 \| good
2026-03-11T08:00:00.000Z	26 \| good	3.061 \| good	13.385 \| good	27.524 \| good	0.989 \| good	15.774 \| good	0.235 \| good
2026-03-11T09:00:00.000Z	24 \| good	2.648 \| good	10.99 \| good	26.413 \| good	0.991 \| good	15.745 \| good	0.237 \| good
2026-03-11T10:00:00.000Z	22 \| good	3.824 \| good	16.564 \| good	21.566 \| good	0.986 \| good	15.311 \| good	0.232 \| good
2026-03-11T11:00:00.000Z	22 \| good	3.841 \| good	16.479 \| good	24.005 \| good	0.98 \| good	14.878 \| good	0.226 \| good
2026-03-11T12:00:00.000Z	58 \| moderate	12.766 \| fine	15.2 \| good	21.487 \| good	0.947 \| good	13.981 \| good	0.218 \| good
2026-03-11T13:00:00.000Z	58 \| moderate	12.507 \| fine	14.931 \| good	21.032 \| good	1.027 \| good	13.67 \| good	0.226 \| good
2026-03-11T14:00:00.000Z	58 \| moderate	12.629 \| fine	15.007 \| good	20.578 \| good	1.107 \| good	13.358 \| good	0.235 \| good
2026-03-11T15:00:00.000Z	60 \| moderate	14.047 \| fine	16.239 \| good	20.124 \| good	1.187 \| good	13.047 \| good	0.243 \| good
2026-03-11T16:00:00.000Z	60 \| moderate	13.664 \| fine	15.476 \| good	23.664 \| good	1.446 \| good	11.6 \| good	0.226 \| good
2026-03-11T17:00:00.000Z	44 \| good	7.614 \| good	33.389 \| good	27.498 \| good	1.739 \| good	10.367 \| good	0.21 \| good
2026-03-11T18:00:00.000Z	52 \| moderate	9.794 \| good	11.902 \| good	30.746 \| good	1.965 \| good	8.705 \| good	0.19 \| good
2026-03-11T19:00:00.000Z	49 \| good	9.049 \| good	11.403 \| good	34.223 \| good	1.813 \| good	7.779 \| good	0.183 \| good
2026-03-11T20:00:00.000Z	49 \| good	8.937 \| good	11.372 \| good	37.7 \| good	1.661 \| good	6.853 \| good	0.176 \| good
2026-03-11T21:00:00.000Z	49 \| good	9.381 \| good	11.918 \| good	41.177 \| good	1.509 \| good	5.927 \| good	0.169 \| good
2026-03-11T22:00:00.000Z	52 \| moderate	9.72 \| good	12.389 \| good	41.987 \| good	1.431 \| good	5.935 \| good	0.169 \| good
2026-03-11T23:00:00.000Z	52 \| moderate	9.74 \| good	12.463 \| good	42.798 \| good	1.353 \| good	5.943 \| good	0.168 \| good
2026-03-12T00:00:00.000Z	52 \| moderate	9.724 \| good	12.477 \| good	43.608 \| good	1.275 \| good	5.951 \| good	0.167 \| good
2026-03-12T01:00:00.000Z	52 \| moderate	10.01 \| good	12.798 \| good	36.646 \| good	1.31 \| good	10.248 \| good	0.189 \| good
2026-03-12T02:00:00.000Z	54 \| moderate	11.145 \| good	13.805 \| good	29.685 \| good	1.345 \| good	14.544 \| good	0.211 \| good
2026-03-12T03:00:00.000Z	58 \| moderate	12.837 \| fine	15.42 \| good	22.723 \| good	1.38 \| good	18.841 \| good	0.232 \| good
2026-03-12T04:00:00.000Z	62 \| moderate	14.506 \| fine	17.037 \| good	20.356 \| good	1.522 \| good	19.681 \| good	0.25 \| good
2026-03-12T05:00:00.000Z	64 \| moderate	15.9 \| fine	18.38 \| good	17.989 \| good	1.663 \| good	20.522 \| good	0.268 \| good

Redwood City

Empower business decisions with accurate air quality data

Redwood City, California air quality map: Real-time AQI near you

0.28ppm

How accurate is California, USA air quality data?

Air quality measurements for California, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.

Source: Ambee Data Sources

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Frequently asked questions

How frequently is the air quality data for Redwood City, California updated?

Air quality data for Redwood City, California is updated on an hourly basis.

When did Redwood City, California experience the worst air quality in the last 24 hours?

The worst air quality in Redwood City, California was recorded at 11:00:00 on 2026-03-09.

When did Redwood City, California have its best air quality in the last 24 hours?

The best air quality in Redwood City, California was recorded at 02:00:00 on 2026-03-09.

What is the real-time air quality index for Redwood City, California?

The real-time air quality index in Redwood City, California is 54, currently categorized as Moderate.

Which pollutant is found most often in Redwood City, California?

The most common pollutant in Redwood City, California is PM2.5.

What can I do if the air quality in Redwood City, California is poor?

If the air quality in Redwood City, California is poor, limit outdoor activities and use a mask to safeguard your health.

What are the current PM_2.5 levels in Redwood City, California?

The measured PM_2.5 levels in Redwood City, California at present are 11.401 μg/m³.

What are the current PM₁₀ levels at Redwood City, California?

The current PM₁₀ levels in Redwood City, California are 51.009 μg/m³.

What are the current carbon monoxide (CO) levels at Redwood City, California?

The current carbon monoxide (CO) level in Redwood City, California is 0.3 ppm.

What are the current sulfur dioxide (SO₂) levels at Redwood City, California?

The current sulfur dioxide (SO₂) levels in Redwood City, California are 0.312 ppb.

What are the current ozone (O₃) levels at Redwood City, California?

The current ozone (O₃) levels at Redwood City, California is 29.015 ppm.

What are the current nitrogen dioxide (NO₂) levels at Redwood City, California?

The current nitrogen dioxide (NO₂) levels at Redwood City, California is 4.205 ppb.

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