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

The current PM10 levels in Redwood City, California are 56.66 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 0.376 ppb.

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

The current ozone (O3) levels at Redwood City, California is 4.009 ppm.

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

The current nitrogen dioxide (NO2) levels at Redwood City, California is 11.99 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 17.58 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)

17.58 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

56.66 μg/m³

155

255

425

605+

Ozone (O₃)

4.01 ppb

201

201+

Sulfur Dioxide (SO₂)

0.38 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

11.99 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.30 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Redwood City, California

Get Live Pollen Counts

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
2025-12-05T15:00:00.000Z	49 \| good	9.268 \| good	39.887 \| good	4.209 \| good	0.463 \| good	14.899 \| good	0.576 \| good
2025-12-05T16:00:00.000Z	49 \| good	8.532 \| good	39.575 \| good	6.693 \| good	0.452 \| good	16.728 \| good	0.85 \| good
2025-12-05T17:00:00.000Z	44 \| good	8.184 \| good	36.61 \| good	6.455 \| good	0.442 \| good	17.998 \| good	0.653 \| good
2025-12-05T18:00:00.000Z	44 \| good	7.699 \| good	34.686 \| good	8.828 \| good	0.473 \| good	13.332 \| good	0.45 \| good
2025-12-05T19:00:00.000Z	44 \| good	7.946 \| good	35.135 \| good	8.969 \| good	0.489 \| good	12.915 \| good	0.425 \| good
2025-12-05T20:00:00.000Z	62 \| moderate	14.927 \| fine	58.603 \| fine	8.26 \| good	0.442 \| good	11.628 \| good	0.326 \| good
2025-12-05T21:00:00.000Z	62 \| moderate	14.879 \| fine	66.405 \| fine	12.47 \| good	0.421 \| good	12.632 \| good	0.323 \| good
2025-12-05T22:00:00.000Z	66 \| moderate	16.755 \| fine	64.791 \| fine	14.428 \| good	0.555 \| good	10.613 \| good	0.233 \| good
2025-12-05T23:00:00.000Z	81 \| moderate	24.63 \| fine	115.74 \| fine	15.237 \| good	0.503 \| good	10.301 \| good	0.224 \| good
2025-12-06T00:00:00.000Z	66 \| moderate	16.688 \| fine	79.05 \| fine	13.464 \| good	0.488 \| good	11.449 \| good	0.221 \| good
2025-12-06T01:00:00.000Z	62 \| moderate	14.8 \| fine	64.785 \| fine	13.164 \| good	0.458 \| good	13.324 \| good	0.224 \| good
2025-12-06T02:00:00.000Z	67 \| moderate	18.458 \| fine	69.761 \| fine	10.425 \| good	0.439 \| good	15.217 \| good	0.314 \| good
2025-12-06T03:00:00.000Z	69 \| moderate	19.159 \| fine	82.238 \| fine	8.288 \| good	0.408 \| good	20.613 \| good	0.491 \| good
2025-12-06T04:00:00.000Z	75 \| moderate	21.512 \| fine	70.73 \| fine	8.414 \| good	0.427 \| good	20.653 \| good	0.579 \| good
2025-12-06T05:00:00.000Z	75 \| moderate	21.74 \| fine	93.546 \| fine	3.991 \| good	0.462 \| good	20.826 \| good	0.759 \| good
2025-12-06T06:00:00.000Z	73 \| moderate	20.639 \| fine	84.358 \| fine	2.202 \| good	0.453 \| good	19.506 \| good	0.862 \| good
2025-12-06T07:00:00.000Z	69 \| moderate	18.825 \| fine	67.704 \| fine	2.1 \| good	0.476 \| good	19.474 \| good	0.868 \| good
2025-12-06T08:00:00.000Z	73 \| moderate	21.149 \| fine	81.276 \| fine	2.328 \| good	0.422 \| good	17.301 \| good	0.613 \| good
2025-12-06T09:00:00.000Z	75 \| moderate	21.631 \| fine	85.257 \| fine	2.421 \| good	0.43 \| good	17.32 \| good	0.613 \| good
2025-12-06T10:00:00.000Z	73 \| moderate	21.243 \| fine	87.083 \| fine	2.766 \| good	0.909 \| good	7.874 \| good	0.431 \| good
2025-12-06T11:00:00.000Z	66 \| moderate	17.307 \| fine	54.589 \| good	2.906 \| good	0.851 \| good	7.697 \| good	0.381 \| good
2025-12-06T12:00:00.000Z	58 \| moderate	12.713 \| fine	32.352 \| good	5.351 \| good	0.357 \| good	11.328 \| good	0.366 \| good
2025-12-06T13:00:00.000Z	66 \| moderate	16.616 \| fine	74.336 \| fine	2.121 \| good	0.383 \| good	12.769 \| good	0.34 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	13.939 \| fine	54.007 \| good	3.154 \| good	0.512 \| good	9.231 \| good	0.262 \| good
2025-12-06T15:00:00.000Z	58 \| moderate	12.572 \| fine	44.699 \| good	4.583 \| good	0.404 \| good	9.273 \| good	0.271 \| good
2025-12-06T16:00:00.000Z	66 \| moderate	17.431 \| fine	74.932 \| fine	6.058 \| good	0.377 \| good	7.57 \| good	0.248 \| good
2025-12-06T17:00:00.000Z	64 \| moderate	15.802 \| fine	76.371 \| fine	10.323 \| good	0.43 \| good	8.007 \| good	0.23 \| good
2025-12-06T18:00:00.000Z	62 \| moderate	15.455 \| fine	55.498 \| fine	10.331 \| good	0.495 \| good	6.625 \| good	0.226 \| good
2025-12-06T19:00:00.000Z	62 \| moderate	14.627 \| fine	68.854 \| fine	11.316 \| good	0.512 \| good	6.556 \| good	0.225 \| good
2025-12-06T20:00:00.000Z	56 \| moderate	11.661 \| good	30.697 \| good	10.593 \| good	0.54 \| good	5.447 \| good	0.224 \| good
2025-12-06T21:00:00.000Z	62 \| moderate	15.355 \| fine	65.257 \| fine	12.325 \| good	0.648 \| good	6.087 \| good	0.227 \| good
2025-12-06T22:00:00.000Z	66 \| moderate	16.868 \| fine	69.012 \| fine	12.484 \| good	0.665 \| good	6.071 \| good	0.226 \| good
2025-12-06T23:00:00.000Z	69 \| moderate	18.884 \| fine	67.137 \| fine	12.649 \| good	0.586 \| good	5.97 \| good	0.225 \| good
2025-12-07T00:00:00.000Z	66 \| moderate	16.711 \| fine	70.804 \| fine	12.614 \| good	0.493 \| good	9.131 \| good	0.223 \| good
2025-12-07T01:00:00.000Z	64 \| moderate	15.7 \| fine	66.967 \| fine	12.744 \| good	0.453 \| good	10.686 \| good	0.219 \| good
2025-12-07T02:00:00.000Z	73 \| moderate	20.983 \| fine	71.652 \| fine	10.862 \| good	0.418 \| good	9.867 \| good	0.228 \| good
2025-12-07T03:00:00.000Z	67 \| moderate	18.169 \| fine	55.983 \| fine	8.054 \| good	0.437 \| good	11.78 \| good	0.31 \| good
2025-12-07T04:00:00.000Z	67 \| moderate	17.683 \| fine	63.116 \| fine	7.983 \| good	0.406 \| good	16.24 \| good	0.567 \| good
2025-12-07T05:00:00.000Z	62 \| moderate	14.897 \| fine	69.809 \| fine	6.876 \| good	0.434 \| good	16.118 \| good	0.657 \| good
2025-12-07T06:00:00.000Z	66 \| moderate	16.913 \| fine	67.649 \| fine	5.064 \| good	0.435 \| good	14.076 \| good	0.681 \| good
2025-12-07T07:00:00.000Z	69 \| moderate	18.962 \| fine	75.727 \| fine	3.369 \| good	0.397 \| good	13.719 \| good	0.697 \| good
2025-12-07T08:00:00.000Z	76 \| moderate	21.254 \| fine	105.7 \| fine	1.784 \| good	0.383 \| good	13.531 \| good	0.71 \| good
2025-12-07T09:00:00.000Z	69 \| moderate	18.721 \| fine	81.915 \| fine	1.784 \| good	0.389 \| good	13.561 \| good	0.71 \| good
2025-12-07T10:00:00.000Z	67 \| moderate	18.235 \| fine	80.511 \| fine	1.784 \| good	0.484 \| good	4.335 \| good	0.271 \| good
2025-12-07T11:00:00.000Z	67 \| moderate	18.073 \| fine	66.114 \| fine	1.784 \| good	0.51 \| good	3.555 \| good	0.258 \| good
2025-12-07T12:00:00.000Z	54 \| moderate	11 \| good	28.295 \| good	5.745 \| good	0.359 \| good	7.12 \| good	0.238 \| good
2025-12-07T13:00:00.000Z	66 \| moderate	16.918 \| fine	57.459 \| fine	4.281 \| good	0.379 \| good	10.903 \| good	0.322 \| good
2025-12-07T14:00:00.000Z	54 \| moderate	10.69 \| good	31.976 \| good	4.338 \| good	0.454 \| good	9.582 \| good	0.294 \| good
2025-12-07T14:00:00.000Z	67 \| moderate	17.58 \| fine	56.66 \| fine	4.009 \| good	0.376 \| good	11.99 \| good	0.3 \| good
2025-12-07T15:00:00.000Z	58 \| moderate	12.808 \| fine	57.341 \| fine	5.316 \| good	1.409 \| good	18.193 \| good	0.274 \| good
2025-12-07T16:00:00.000Z	60 \| moderate	13.887 \| fine	61.988 \| fine	8.026 \| good	1.532 \| good	16.851 \| good	0.28 \| good
2025-12-07T17:00:00.000Z	54 \| moderate	11.064 \| good	48.985 \| good	9.534 \| good	1.654 \| good	15.509 \| good	0.285 \| good
2025-12-07T18:00:00.000Z	44 \| good	7.838 \| good	34.695 \| good	11.975 \| good	1.777 \| good	14.167 \| good	0.291 \| good
2025-12-07T19:00:00.000Z	27 \| good	5.132 \| good	22.569 \| good	15.133 \| good	2.057 \| good	13.075 \| good	0.26 \| good
2025-12-07T20:00:00.000Z	33 \| good	5.525 \| good	24.185 \| good	16.775 \| good	2.337 \| good	11.983 \| good	0.23 \| good
2025-12-07T21:00:00.000Z	49 \| good	8.543 \| good	37.533 \| good	16.939 \| good	2.617 \| good	10.891 \| good	0.199 \| good
2025-12-07T22:00:00.000Z	54 \| moderate	10.55 \| good	47.008 \| good	16.531 \| good	2.605 \| good	12.265 \| good	0.198 \| good
2025-12-07T23:00:00.000Z	56 \| moderate	12.445 \| fine	56.05 \| fine	12.506 \| good	2.592 \| good	13.639 \| good	0.197 \| good
2025-12-08T00:00:00.000Z	54 \| moderate	11.066 \| good	49.053 \| good	10.138 \| good	2.579 \| good	15.013 \| good	0.195 \| good
2025-12-08T01:00:00.000Z	54 \| moderate	11.111 \| good	49.325 \| good	8.438 \| good	2.594 \| good	17.639 \| good	0.233 \| good
2025-12-08T02:00:00.000Z	60 \| moderate	13.939 \| fine	62.515 \| fine	5.365 \| good	2.609 \| good	20.266 \| good	0.27 \| good
2025-12-08T03:00:00.000Z	56 \| moderate	12.444 \| fine	55.281 \| fine	7.693 \| good	2.624 \| good	22.893 \| good	0.307 \| good
2025-12-08T04:00:00.000Z	56 \| moderate	12.358 \| fine	54.768 \| good	7.668 \| good	2.815 \| good	22.971 \| good	0.32 \| good
2025-12-08T05:00:00.000Z	56 \| moderate	11.751 \| good	52.375 \| good	7.381 \| good	3.006 \| good	23.05 \| good	0.334 \| good
2025-12-08T06:00:00.000Z	52 \| moderate	9.826 \| good	43.492 \| good	6.673 \| good	3.197 \| good	23.128 \| good	0.347 \| good
2025-12-08T07:00:00.000Z	52 \| moderate	9.536 \| good	42.808 \| good	6.842 \| good	3.086 \| good	22.565 \| good	0.338 \| good
2025-12-08T08:00:00.000Z	52 \| moderate	9.646 \| good	43.032 \| good	6.306 \| good	2.975 \| good	22.001 \| good	0.33 \| good
2025-12-08T09:00:00.000Z	38 \| good	7.294 \| good	32.063 \| good	6.035 \| good	2.863 \| good	21.437 \| good	0.322 \| good
2025-12-08T10:00:00.000Z	33 \| good	6.436 \| good	28.349 \| good	5.522 \| good	2.626 \| good	20.398 \| good	0.312 \| good
2025-12-08T11:00:00.000Z	44 \| good	7.611 \| good	33.375 \| good	4.613 \| good	2.388 \| good	19.358 \| good	0.302 \| good
2025-12-08T12:00:00.000Z	49 \| good	8.891 \| good	39.463 \| good	3.741 \| good	2.15 \| good	18.319 \| good	0.292 \| good
2025-12-08T13:00:00.000Z	44 \| good	8.026 \| good	35.819 \| good	3.263 \| good	2.13 \| good	18.111 \| good	0.298 \| good
2025-12-08T14:00:00.000Z	54 \| moderate	11.021 \| good	48.974 \| good	3.2 \| good	2.109 \| good	17.902 \| good	0.304 \| good
2025-12-08T15:00:00.000Z	54 \| moderate	10.671 \| good	47.502 \| good	2.963 \| good	2.089 \| good	17.694 \| good	0.31 \| good
2025-12-08T16:00:00.000Z	62 \| moderate	14.708 \| fine	65.776 \| fine	6.066 \| good	2.489 \| good	16.781 \| good	0.296 \| good
2025-12-08T17:00:00.000Z	60 \| moderate	13.984 \| fine	62.614 \| fine	10.962 \| good	2.889 \| good	15.869 \| good	0.282 \| good
2025-12-08T18:00:00.000Z	56 \| moderate	12.281 \| fine	54.488 \| good	12.433 \| good	3.289 \| good	14.956 \| good	0.268 \| good
2025-12-08T19:00:00.000Z	56 \| moderate	11.554 \| good	51.629 \| good	14.078 \| good	3.178 \| good	13.316 \| good	0.238 \| good
2025-12-08T20:00:00.000Z	52 \| moderate	9.834 \| good	43.835 \| good	15.518 \| good	3.067 \| good	11.677 \| good	0.209 \| good
2025-12-08T21:00:00.000Z	52 \| moderate	9.53 \| good	41.975 \| good	16.757 \| good	2.956 \| good	10.038 \| good	0.179 \| good
2025-12-08T22:00:00.000Z	54 \| moderate	10.734 \| good	47.64 \| good	17.102 \| good	2.868 \| good	11.106 \| good	0.181 \| good
2025-12-08T23:00:00.000Z	56 \| moderate	12.237 \| fine	54.951 \| good	15.079 \| good	2.78 \| good	12.174 \| good	0.183 \| good
2025-12-09T00:00:00.000Z	60 \| moderate	13.644 \| fine	61.013 \| fine	12.906 \| good	2.693 \| good	13.242 \| good	0.185 \| good
2025-12-09T01:00:00.000Z	60 \| moderate	13.954 \| fine	62.438 \| fine	6.161 \| good	2.602 \| good	16.35 \| good	0.223 \| good
2025-12-09T02:00:00.000Z	62 \| moderate	14.588 \| fine	65.175 \| fine	3.113 \| good	2.511 \| good	19.459 \| good	0.261 \| good
2025-12-09T03:00:00.000Z	60 \| moderate	13.922 \| fine	62.194 \| fine	4.872 \| good	2.42 \| good	22.567 \| good	0.299 \| good
2025-12-09T04:00:00.000Z	60 \| moderate	13.734 \| fine	61.663 \| fine	5.108 \| good	2.569 \| good	22.38 \| good	0.313 \| good
2025-12-09T05:00:00.000Z	58 \| moderate	12.59 \| fine	56.01 \| fine	5.843 \| good	2.718 \| good	22.194 \| good	0.326 \| good
2025-12-09T06:00:00.000Z	58 \| moderate	13.174 \| fine	58.973 \| fine	5.976 \| good	2.867 \| good	22.007 \| good	0.34 \| good
2025-12-09T07:00:00.000Z	52 \| moderate	9.806 \| good	43.196 \| good	5.9 \| good	2.741 \| good	21.164 \| good	0.338 \| good
2025-12-09T08:00:00.000Z	38 \| good	7.195 \| good	31.68 \| good	5.944 \| good	2.615 \| good	20.322 \| good	0.335 \| good
2025-12-09T09:00:00.000Z	38 \| good	6.644 \| good	29.11 \| good	5.407 \| good	2.489 \| good	19.479 \| good	0.333 \| good
2025-12-09T10:00:00.000Z	38 \| good	6.701 \| good	29.38 \| good	5.337 \| good	2.286 \| good	18.47 \| good	0.319 \| good
2025-12-09T11:00:00.000Z	33 \| good	5.577 \| good	24.089 \| good	5.692 \| good	2.083 \| good	17.461 \| good	0.304 \| good
2025-12-09T12:00:00.000Z	33 \| good	5.675 \| good	24.832 \| good	4.814 \| good	1.881 \| good	16.453 \| good	0.289 \| good
2025-12-09T13:00:00.000Z	22 \| good	4.009 \| good	17.207 \| good	4.236 \| good	1.982 \| good	16.822 \| good	0.286 \| good
2025-12-09T14:00:00.000Z	33 \| good	6.273 \| good	27.459 \| good	4.651 \| good	2.084 \| good	17.192 \| good	0.283 \| good

Redwood City

Empower business decisions with accurate air quality data

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

0.32ppm

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 08:00:00 on 2025-12-07.

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 12:00:00 on 2025-12-07.

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

The real-time air quality index in Redwood City, California is 67, 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 17.58 μg/m³.

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

The current PM₁₀ levels in Redwood City, California are 56.66 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 0.376 ppb.

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

The current ozone (O₃) levels at Redwood City, California is 4.009 ppm.

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

The current nitrogen dioxide (NO₂) levels at Redwood City, California is 11.99 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-05T15:00:00.000Z	49 \| good	9.268 \| good	39.887 \| good	4.209 \| good	0.463 \| good	14.899 \| good	0.576 \| good
2025-12-05T16:00:00.000Z	49 \| good	8.532 \| good	39.575 \| good	6.693 \| good	0.452 \| good	16.728 \| good	0.85 \| good
2025-12-05T17:00:00.000Z	44 \| good	8.184 \| good	36.61 \| good	6.455 \| good	0.442 \| good	17.998 \| good	0.653 \| good
2025-12-05T18:00:00.000Z	44 \| good	7.699 \| good	34.686 \| good	8.828 \| good	0.473 \| good	13.332 \| good	0.45 \| good
2025-12-05T19:00:00.000Z	44 \| good	7.946 \| good	35.135 \| good	8.969 \| good	0.489 \| good	12.915 \| good	0.425 \| good
2025-12-05T20:00:00.000Z	62 \| moderate	14.927 \| fine	58.603 \| fine	8.26 \| good	0.442 \| good	11.628 \| good	0.326 \| good
2025-12-05T21:00:00.000Z	62 \| moderate	14.879 \| fine	66.405 \| fine	12.47 \| good	0.421 \| good	12.632 \| good	0.323 \| good
2025-12-05T22:00:00.000Z	66 \| moderate	16.755 \| fine	64.791 \| fine	14.428 \| good	0.555 \| good	10.613 \| good	0.233 \| good
2025-12-05T23:00:00.000Z	81 \| moderate	24.63 \| fine	115.74 \| fine	15.237 \| good	0.503 \| good	10.301 \| good	0.224 \| good
2025-12-06T00:00:00.000Z	66 \| moderate	16.688 \| fine	79.05 \| fine	13.464 \| good	0.488 \| good	11.449 \| good	0.221 \| good
2025-12-06T01:00:00.000Z	62 \| moderate	14.8 \| fine	64.785 \| fine	13.164 \| good	0.458 \| good	13.324 \| good	0.224 \| good
2025-12-06T02:00:00.000Z	67 \| moderate	18.458 \| fine	69.761 \| fine	10.425 \| good	0.439 \| good	15.217 \| good	0.314 \| good
2025-12-06T03:00:00.000Z	69 \| moderate	19.159 \| fine	82.238 \| fine	8.288 \| good	0.408 \| good	20.613 \| good	0.491 \| good
2025-12-06T04:00:00.000Z	75 \| moderate	21.512 \| fine	70.73 \| fine	8.414 \| good	0.427 \| good	20.653 \| good	0.579 \| good
2025-12-06T05:00:00.000Z	75 \| moderate	21.74 \| fine	93.546 \| fine	3.991 \| good	0.462 \| good	20.826 \| good	0.759 \| good
2025-12-06T06:00:00.000Z	73 \| moderate	20.639 \| fine	84.358 \| fine	2.202 \| good	0.453 \| good	19.506 \| good	0.862 \| good
2025-12-06T07:00:00.000Z	69 \| moderate	18.825 \| fine	67.704 \| fine	2.1 \| good	0.476 \| good	19.474 \| good	0.868 \| good
2025-12-06T08:00:00.000Z	73 \| moderate	21.149 \| fine	81.276 \| fine	2.328 \| good	0.422 \| good	17.301 \| good	0.613 \| good
2025-12-06T09:00:00.000Z	75 \| moderate	21.631 \| fine	85.257 \| fine	2.421 \| good	0.43 \| good	17.32 \| good	0.613 \| good
2025-12-06T10:00:00.000Z	73 \| moderate	21.243 \| fine	87.083 \| fine	2.766 \| good	0.909 \| good	7.874 \| good	0.431 \| good
2025-12-06T11:00:00.000Z	66 \| moderate	17.307 \| fine	54.589 \| good	2.906 \| good	0.851 \| good	7.697 \| good	0.381 \| good
2025-12-06T12:00:00.000Z	58 \| moderate	12.713 \| fine	32.352 \| good	5.351 \| good	0.357 \| good	11.328 \| good	0.366 \| good
2025-12-06T13:00:00.000Z	66 \| moderate	16.616 \| fine	74.336 \| fine	2.121 \| good	0.383 \| good	12.769 \| good	0.34 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	13.939 \| fine	54.007 \| good	3.154 \| good	0.512 \| good	9.231 \| good	0.262 \| good
2025-12-06T15:00:00.000Z	58 \| moderate	12.572 \| fine	44.699 \| good	4.583 \| good	0.404 \| good	9.273 \| good	0.271 \| good
2025-12-06T16:00:00.000Z	66 \| moderate	17.431 \| fine	74.932 \| fine	6.058 \| good	0.377 \| good	7.57 \| good	0.248 \| good
2025-12-06T17:00:00.000Z	64 \| moderate	15.802 \| fine	76.371 \| fine	10.323 \| good	0.43 \| good	8.007 \| good	0.23 \| good
2025-12-06T18:00:00.000Z	62 \| moderate	15.455 \| fine	55.498 \| fine	10.331 \| good	0.495 \| good	6.625 \| good	0.226 \| good
2025-12-06T19:00:00.000Z	62 \| moderate	14.627 \| fine	68.854 \| fine	11.316 \| good	0.512 \| good	6.556 \| good	0.225 \| good
2025-12-06T20:00:00.000Z	56 \| moderate	11.661 \| good	30.697 \| good	10.593 \| good	0.54 \| good	5.447 \| good	0.224 \| good
2025-12-06T21:00:00.000Z	62 \| moderate	15.355 \| fine	65.257 \| fine	12.325 \| good	0.648 \| good	6.087 \| good	0.227 \| good
2025-12-06T22:00:00.000Z	66 \| moderate	16.868 \| fine	69.012 \| fine	12.484 \| good	0.665 \| good	6.071 \| good	0.226 \| good
2025-12-06T23:00:00.000Z	69 \| moderate	18.884 \| fine	67.137 \| fine	12.649 \| good	0.586 \| good	5.97 \| good	0.225 \| good
2025-12-07T00:00:00.000Z	66 \| moderate	16.711 \| fine	70.804 \| fine	12.614 \| good	0.493 \| good	9.131 \| good	0.223 \| good
2025-12-07T01:00:00.000Z	64 \| moderate	15.7 \| fine	66.967 \| fine	12.744 \| good	0.453 \| good	10.686 \| good	0.219 \| good
2025-12-07T02:00:00.000Z	73 \| moderate	20.983 \| fine	71.652 \| fine	10.862 \| good	0.418 \| good	9.867 \| good	0.228 \| good
2025-12-07T03:00:00.000Z	67 \| moderate	18.169 \| fine	55.983 \| fine	8.054 \| good	0.437 \| good	11.78 \| good	0.31 \| good
2025-12-07T04:00:00.000Z	67 \| moderate	17.683 \| fine	63.116 \| fine	7.983 \| good	0.406 \| good	16.24 \| good	0.567 \| good
2025-12-07T05:00:00.000Z	62 \| moderate	14.897 \| fine	69.809 \| fine	6.876 \| good	0.434 \| good	16.118 \| good	0.657 \| good
2025-12-07T06:00:00.000Z	66 \| moderate	16.913 \| fine	67.649 \| fine	5.064 \| good	0.435 \| good	14.076 \| good	0.681 \| good
2025-12-07T07:00:00.000Z	69 \| moderate	18.962 \| fine	75.727 \| fine	3.369 \| good	0.397 \| good	13.719 \| good	0.697 \| good
2025-12-07T08:00:00.000Z	76 \| moderate	21.254 \| fine	105.7 \| fine	1.784 \| good	0.383 \| good	13.531 \| good	0.71 \| good
2025-12-07T09:00:00.000Z	69 \| moderate	18.721 \| fine	81.915 \| fine	1.784 \| good	0.389 \| good	13.561 \| good	0.71 \| good
2025-12-07T10:00:00.000Z	67 \| moderate	18.235 \| fine	80.511 \| fine	1.784 \| good	0.484 \| good	4.335 \| good	0.271 \| good
2025-12-07T11:00:00.000Z	67 \| moderate	18.073 \| fine	66.114 \| fine	1.784 \| good	0.51 \| good	3.555 \| good	0.258 \| good
2025-12-07T12:00:00.000Z	54 \| moderate	11 \| good	28.295 \| good	5.745 \| good	0.359 \| good	7.12 \| good	0.238 \| good
2025-12-07T13:00:00.000Z	66 \| moderate	16.918 \| fine	57.459 \| fine	4.281 \| good	0.379 \| good	10.903 \| good	0.322 \| good
2025-12-07T14:00:00.000Z	54 \| moderate	10.69 \| good	31.976 \| good	4.338 \| good	0.454 \| good	9.582 \| good	0.294 \| good
2025-12-07T14:00:00.000Z	67 \| moderate	17.58 \| fine	56.66 \| fine	4.009 \| good	0.376 \| good	11.99 \| good	0.3 \| good
2025-12-07T15:00:00.000Z	58 \| moderate	12.808 \| fine	57.341 \| fine	5.316 \| good	1.409 \| good	18.193 \| good	0.274 \| good
2025-12-07T16:00:00.000Z	60 \| moderate	13.887 \| fine	61.988 \| fine	8.026 \| good	1.532 \| good	16.851 \| good	0.28 \| good
2025-12-07T17:00:00.000Z	54 \| moderate	11.064 \| good	48.985 \| good	9.534 \| good	1.654 \| good	15.509 \| good	0.285 \| good
2025-12-07T18:00:00.000Z	44 \| good	7.838 \| good	34.695 \| good	11.975 \| good	1.777 \| good	14.167 \| good	0.291 \| good
2025-12-07T19:00:00.000Z	27 \| good	5.132 \| good	22.569 \| good	15.133 \| good	2.057 \| good	13.075 \| good	0.26 \| good
2025-12-07T20:00:00.000Z	33 \| good	5.525 \| good	24.185 \| good	16.775 \| good	2.337 \| good	11.983 \| good	0.23 \| good
2025-12-07T21:00:00.000Z	49 \| good	8.543 \| good	37.533 \| good	16.939 \| good	2.617 \| good	10.891 \| good	0.199 \| good
2025-12-07T22:00:00.000Z	54 \| moderate	10.55 \| good	47.008 \| good	16.531 \| good	2.605 \| good	12.265 \| good	0.198 \| good
2025-12-07T23:00:00.000Z	56 \| moderate	12.445 \| fine	56.05 \| fine	12.506 \| good	2.592 \| good	13.639 \| good	0.197 \| good
2025-12-08T00:00:00.000Z	54 \| moderate	11.066 \| good	49.053 \| good	10.138 \| good	2.579 \| good	15.013 \| good	0.195 \| good
2025-12-08T01:00:00.000Z	54 \| moderate	11.111 \| good	49.325 \| good	8.438 \| good	2.594 \| good	17.639 \| good	0.233 \| good
2025-12-08T02:00:00.000Z	60 \| moderate	13.939 \| fine	62.515 \| fine	5.365 \| good	2.609 \| good	20.266 \| good	0.27 \| good
2025-12-08T03:00:00.000Z	56 \| moderate	12.444 \| fine	55.281 \| fine	7.693 \| good	2.624 \| good	22.893 \| good	0.307 \| good
2025-12-08T04:00:00.000Z	56 \| moderate	12.358 \| fine	54.768 \| good	7.668 \| good	2.815 \| good	22.971 \| good	0.32 \| good
2025-12-08T05:00:00.000Z	56 \| moderate	11.751 \| good	52.375 \| good	7.381 \| good	3.006 \| good	23.05 \| good	0.334 \| good
2025-12-08T06:00:00.000Z	52 \| moderate	9.826 \| good	43.492 \| good	6.673 \| good	3.197 \| good	23.128 \| good	0.347 \| good
2025-12-08T07:00:00.000Z	52 \| moderate	9.536 \| good	42.808 \| good	6.842 \| good	3.086 \| good	22.565 \| good	0.338 \| good
2025-12-08T08:00:00.000Z	52 \| moderate	9.646 \| good	43.032 \| good	6.306 \| good	2.975 \| good	22.001 \| good	0.33 \| good
2025-12-08T09:00:00.000Z	38 \| good	7.294 \| good	32.063 \| good	6.035 \| good	2.863 \| good	21.437 \| good	0.322 \| good
2025-12-08T10:00:00.000Z	33 \| good	6.436 \| good	28.349 \| good	5.522 \| good	2.626 \| good	20.398 \| good	0.312 \| good
2025-12-08T11:00:00.000Z	44 \| good	7.611 \| good	33.375 \| good	4.613 \| good	2.388 \| good	19.358 \| good	0.302 \| good
2025-12-08T12:00:00.000Z	49 \| good	8.891 \| good	39.463 \| good	3.741 \| good	2.15 \| good	18.319 \| good	0.292 \| good
2025-12-08T13:00:00.000Z	44 \| good	8.026 \| good	35.819 \| good	3.263 \| good	2.13 \| good	18.111 \| good	0.298 \| good
2025-12-08T14:00:00.000Z	54 \| moderate	11.021 \| good	48.974 \| good	3.2 \| good	2.109 \| good	17.902 \| good	0.304 \| good
2025-12-08T15:00:00.000Z	54 \| moderate	10.671 \| good	47.502 \| good	2.963 \| good	2.089 \| good	17.694 \| good	0.31 \| good
2025-12-08T16:00:00.000Z	62 \| moderate	14.708 \| fine	65.776 \| fine	6.066 \| good	2.489 \| good	16.781 \| good	0.296 \| good
2025-12-08T17:00:00.000Z	60 \| moderate	13.984 \| fine	62.614 \| fine	10.962 \| good	2.889 \| good	15.869 \| good	0.282 \| good
2025-12-08T18:00:00.000Z	56 \| moderate	12.281 \| fine	54.488 \| good	12.433 \| good	3.289 \| good	14.956 \| good	0.268 \| good
2025-12-08T19:00:00.000Z	56 \| moderate	11.554 \| good	51.629 \| good	14.078 \| good	3.178 \| good	13.316 \| good	0.238 \| good
2025-12-08T20:00:00.000Z	52 \| moderate	9.834 \| good	43.835 \| good	15.518 \| good	3.067 \| good	11.677 \| good	0.209 \| good
2025-12-08T21:00:00.000Z	52 \| moderate	9.53 \| good	41.975 \| good	16.757 \| good	2.956 \| good	10.038 \| good	0.179 \| good
2025-12-08T22:00:00.000Z	54 \| moderate	10.734 \| good	47.64 \| good	17.102 \| good	2.868 \| good	11.106 \| good	0.181 \| good
2025-12-08T23:00:00.000Z	56 \| moderate	12.237 \| fine	54.951 \| good	15.079 \| good	2.78 \| good	12.174 \| good	0.183 \| good
2025-12-09T00:00:00.000Z	60 \| moderate	13.644 \| fine	61.013 \| fine	12.906 \| good	2.693 \| good	13.242 \| good	0.185 \| good
2025-12-09T01:00:00.000Z	60 \| moderate	13.954 \| fine	62.438 \| fine	6.161 \| good	2.602 \| good	16.35 \| good	0.223 \| good
2025-12-09T02:00:00.000Z	62 \| moderate	14.588 \| fine	65.175 \| fine	3.113 \| good	2.511 \| good	19.459 \| good	0.261 \| good
2025-12-09T03:00:00.000Z	60 \| moderate	13.922 \| fine	62.194 \| fine	4.872 \| good	2.42 \| good	22.567 \| good	0.299 \| good
2025-12-09T04:00:00.000Z	60 \| moderate	13.734 \| fine	61.663 \| fine	5.108 \| good	2.569 \| good	22.38 \| good	0.313 \| good
2025-12-09T05:00:00.000Z	58 \| moderate	12.59 \| fine	56.01 \| fine	5.843 \| good	2.718 \| good	22.194 \| good	0.326 \| good
2025-12-09T06:00:00.000Z	58 \| moderate	13.174 \| fine	58.973 \| fine	5.976 \| good	2.867 \| good	22.007 \| good	0.34 \| good
2025-12-09T07:00:00.000Z	52 \| moderate	9.806 \| good	43.196 \| good	5.9 \| good	2.741 \| good	21.164 \| good	0.338 \| good
2025-12-09T08:00:00.000Z	38 \| good	7.195 \| good	31.68 \| good	5.944 \| good	2.615 \| good	20.322 \| good	0.335 \| good
2025-12-09T09:00:00.000Z	38 \| good	6.644 \| good	29.11 \| good	5.407 \| good	2.489 \| good	19.479 \| good	0.333 \| good
2025-12-09T10:00:00.000Z	38 \| good	6.701 \| good	29.38 \| good	5.337 \| good	2.286 \| good	18.47 \| good	0.319 \| good
2025-12-09T11:00:00.000Z	33 \| good	5.577 \| good	24.089 \| good	5.692 \| good	2.083 \| good	17.461 \| good	0.304 \| good
2025-12-09T12:00:00.000Z	33 \| good	5.675 \| good	24.832 \| good	4.814 \| good	1.881 \| good	16.453 \| good	0.289 \| good
2025-12-09T13:00:00.000Z	22 \| good	4.009 \| good	17.207 \| good	4.236 \| good	1.982 \| good	16.822 \| good	0.286 \| good
2025-12-09T14:00:00.000Z	33 \| good	6.273 \| good	27.459 \| good	4.651 \| good	2.084 \| good	17.192 \| good	0.283 \| good

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

Common air pollutants in Redwood City, California

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Redwood City, California air quality forecast and history

Empower business decisions with accurate air quality data

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

Air quality in nearby cities

North Fair Oaks, California

San Carlos, California

Menlo Park, California

Belmont, California

East Palo Alto, California

Stanford, California

How accurate is California, USA air quality data?

Air quality levels in US

Frequently asked questions

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

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

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

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

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

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

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

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

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

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

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

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

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

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

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

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

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

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