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

The current PM10 levels in Redwood City, California are 57.025 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 0.765 ppb.

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

The current ozone (O3) levels at Redwood City, California is 16.004 ppm.

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

The current nitrogen dioxide (NO2) levels at Redwood City, California is 8.109 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 12.606 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)

12.61 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

57.02 μg/m³

155

255

425

605+

Ozone (O₃)

16.00 ppb

201

201+

Sulfur Dioxide (SO₂)

0.77 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

8.11 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.40 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
2026-01-22T02:00:00.000Z	60 \| moderate	14.497 \| fine	64.986 \| fine	5.011 \| good	0.788 \| good	22.381 \| good	0.799 \| good
2026-01-22T03:00:00.000Z	58 \| moderate	13.304 \| fine	61.003 \| fine	3.013 \| good	0.819 \| good	19.902 \| good	0.699 \| good
2026-01-22T04:00:00.000Z	56 \| moderate	11.806 \| good	52.03 \| good	3.015 \| good	0.782 \| good	20.999 \| good	0.6 \| good
2026-01-22T05:00:00.000Z	58 \| moderate	12.803 \| fine	57.009 \| fine	3.016 \| good	0.784 \| good	21.598 \| good	0.699 \| good
2026-01-22T06:00:00.000Z	60 \| moderate	14.499 \| fine	64.983 \| fine	1.016 \| good	0.845 \| good	19.403 \| good	0.999 \| good
2026-01-22T07:00:00.000Z	62 \| moderate	14.5 \| fine	64.996 \| fine	5.063 \| good	0.829 \| good	19.408 \| good	0.999 \| good
2026-01-22T08:00:00.000Z	62 \| moderate	14.6 \| fine	64.978 \| fine	4.511 \| good	0.906 \| good	17.21 \| good	0.999 \| good
2026-01-22T09:00:00.000Z	58 \| moderate	13.5 \| fine	61 \| fine	4.027 \| good	0.836 \| good	16.113 \| good	0.799 \| good
2026-01-22T10:00:00.000Z	60 \| moderate	14.101 \| fine	62.981 \| fine	6.148 \| good	0.845 \| good	14.711 \| good	0.699 \| good
2026-01-22T11:00:00.000Z	56 \| moderate	11.705 \| good	52.022 \| good	3.934 \| good	0.817 \| good	13.415 \| good	0.699 \| good
2026-01-22T12:00:00.000Z	56 \| moderate	11.805 \| good	52.018 \| good	3.576 \| good	0.806 \| good	13.412 \| good	0.699 \| good
2026-01-22T13:00:00.000Z	56 \| moderate	11.803 \| good	52.019 \| good	2.884 \| good	0.797 \| good	13.415 \| good	0.7 \| good
2026-01-22T14:00:00.000Z	54 \| moderate	10.909 \| good	48.03 \| good	2.993 \| good	0.769 \| good	12.412 \| good	0.699 \| good
2026-01-22T15:00:00.000Z	52 \| moderate	10.005 \| good	45.026 \| good	2.045 \| good	0.795 \| good	11.313 \| good	0.899 \| good
2026-01-22T16:00:00.000Z	52 \| moderate	10.405 \| good	46.023 \| good	1.014 \| good	0.767 \| good	16.105 \| good	1.199 \| good
2026-01-22T17:00:00.000Z	49 \| good	8.707 \| good	38.038 \| good	2.011 \| good	0.821 \| good	15.806 \| good	0.999 \| good
2026-01-22T18:00:00.000Z	66 \| moderate	17.29 \| fine	76.937 \| fine	3.013 \| good	0.953 \| good	11.708 \| good	0.6 \| good
2026-01-22T19:00:00.000Z	66 \| moderate	17.096 \| fine	76.975 \| fine	4.014 \| good	0.925 \| good	11.211 \| good	0.6 \| good
2026-01-22T20:00:00.000Z	64 \| moderate	15.505 \| fine	69.002 \| fine	5.008 \| good	1.078 \| good	12.804 \| good	0.6 \| good
2026-01-22T21:00:00.000Z	62 \| moderate	14.708 \| fine	65.013 \| fine	6.008 \| good	0.987 \| good	11.907 \| good	0.6 \| good
2026-01-22T22:00:00.000Z	58 \| moderate	13.31 \| fine	61.005 \| fine	9.004 \| good	0.801 \| good	11.106 \| good	0.5 \| good
2026-01-22T23:00:00.000Z	58 \| moderate	12.605 \| fine	57.019 \| fine	12.01 \| good	0.973 \| good	9.719 \| good	0.5 \| good
2026-01-23T00:00:00.000Z	56 \| moderate	12.31 \| fine	55.026 \| fine	16.002 \| good	0.907 \| good	9.911 \| good	0.5 \| good
2026-01-23T01:00:00.000Z	58 \| moderate	12.599 \| fine	56.985 \| fine	17.007 \| good	0.837 \| good	15.892 \| good	0.5 \| good
2026-01-23T02:00:00.000Z	58 \| moderate	13.297 \| fine	60.977 \| fine	16.013 \| good	1.417 \| good	17.591 \| good	0.599 \| good
2026-01-23T03:00:00.000Z	56 \| moderate	11.599 \| good	50.99 \| good	12.02 \| good	0.881 \| good	22.082 \| good	0.599 \| good
2026-01-23T04:00:00.000Z	52 \| moderate	10.305 \| good	46.012 \| good	12.015 \| good	0.731 \| good	19.89 \| good	0.699 \| good
2026-01-23T05:00:00.000Z	54 \| moderate	10.701 \| good	47.991 \| good	11.014 \| good	0.632 \| good	19.691 \| good	0.799 \| good
2026-01-23T06:00:00.000Z	56 \| moderate	11.602 \| good	50.999 \| good	7.018 \| good	0.549 \| good	19.585 \| good	0.799 \| good
2026-01-23T07:00:00.000Z	56 \| moderate	11.598 \| good	51.004 \| good	4.016 \| good	0.467 \| good	19.595 \| good	0.799 \| good
2026-01-23T08:00:00.000Z	58 \| moderate	13.298 \| fine	60.971 \| fine	3.018 \| good	0.488 \| good	15.103 \| good	0.699 \| good
2026-01-23T09:00:00.000Z	58 \| moderate	13.104 \| fine	58.984 \| fine	2.019 \| good	0.515 \| good	14.401 \| good	0.599 \| good
2026-01-23T10:00:00.000Z	56 \| moderate	11.706 \| good	52.011 \| good	1.022 \| good	0.583 \| good	11.306 \| good	0.6 \| good
2026-01-23T11:00:00.000Z	58 \| moderate	13.1 \| fine	59.009 \| fine	1.02 \| good	0.565 \| good	10.707 \| good	0.5 \| good
2026-01-23T12:00:00.000Z	52 \| moderate	9.609 \| good	43.031 \| good	9.959 \| good	0.381 \| good	10.704 \| good	0.5 \| good
2026-01-23T13:00:00.000Z	52 \| moderate	9.608 \| good	43.031 \| good	3.782 \| good	0.963 \| good	10.702 \| good	0.499 \| good
2026-01-23T14:00:00.000Z	49 \| good	9.104 \| good	41.007 \| good	2.02 \| good	0.912 \| good	11.9 \| good	0.499 \| good
2026-01-23T15:00:00.000Z	49 \| good	9.005 \| good	41.008 \| good	3.021 \| good	0.921 \| good	14.994 \| good	0.599 \| good
2026-01-23T16:00:00.000Z	49 \| good	8.504 \| good	37.009 \| good	3.029 \| good	0.781 \| good	16.387 \| good	0.599 \| good
2026-01-23T17:00:00.000Z	49 \| good	8.702 \| good	38.034 \| good	5.023 \| good	0.683 \| good	11.2 \| good	0.499 \| good
2026-01-23T18:00:00.000Z	49 \| good	8.703 \| good	38.015 \| good	8.016 \| good	0.651 \| good	11.198 \| good	0.499 \| good
2026-01-23T19:00:00.000Z	56 \| moderate	11.897 \| good	53.985 \| good	10.012 \| good	0.826 \| good	6.307 \| good	0.5 \| good
2026-01-23T20:00:00.000Z	58 \| moderate	12.897 \| fine	58.971 \| fine	13.006 \| good	1.082 \| good	8.401 \| good	0.499 \| good
2026-01-23T21:00:00.000Z	56 \| moderate	11.9 \| good	54.001 \| good	15.003 \| good	0.858 \| good	8.102 \| good	0.5 \| good
2026-01-23T22:00:00.000Z	58 \| moderate	13.397 \| fine	60.972 \| fine	17.998 \| good	0.768 \| good	8.002 \| good	0.5 \| good
2026-01-23T23:00:00.000Z	58 \| moderate	12.7 \| fine	56.99 \| fine	17.999 \| good	0.897 \| good	7.005 \| good	0.5 \| good
2026-01-24T00:00:00.000Z	60 \| moderate	14.297 \| fine	64.989 \| fine	17.003 \| good	0.884 \| good	6.307 \| good	0.499 \| good
2026-01-24T01:00:00.000Z	58 \| moderate	12.606 \| fine	57.025 \| fine	16.004 \| good	0.765 \| good	8.109 \| good	0.4 \| good
2026-01-24T01:00:00.000Z	58 \| moderate	12.606 \| fine	57.025 \| fine	16.004 \| good	0.765 \| good	8.109 \| good	0.4 \| good
2026-01-24T02:00:00.000Z	77 \| moderate	22.963 \| fine	100.806 \| fine	11.075 \| good	2.585 \| good	17.81 \| good	0.288 \| good
2026-01-24T03:00:00.000Z	69 \| moderate	18.511 \| fine	81.962 \| fine	13.082 \| good	2.581 \| good	21.927 \| good	0.322 \| good
2026-01-24T04:00:00.000Z	67 \| moderate	17.775 \| fine	78.516 \| fine	17.603 \| good	2.745 \| good	22.76 \| good	0.34 \| good
2026-01-24T05:00:00.000Z	66 \| moderate	16.977 \| fine	76.045 \| fine	19.041 \| good	2.909 \| good	23.593 \| good	0.357 \| good
2026-01-24T06:00:00.000Z	66 \| moderate	17.17 \| fine	76.439 \| fine	15.116 \| good	3.073 \| good	24.426 \| good	0.374 \| good
2026-01-24T07:00:00.000Z	64 \| moderate	15.741 \| fine	70.737 \| fine	13.56 \| good	2.931 \| good	23.681 \| good	0.37 \| good
2026-01-24T08:00:00.000Z	56 \| moderate	11.603 \| good	51.475 \| good	14.366 \| good	2.788 \| good	22.936 \| good	0.366 \| good
2026-01-24T09:00:00.000Z	52 \| moderate	9.82 \| good	43.613 \| good	10.528 \| good	2.645 \| good	22.191 \| good	0.362 \| good
2026-01-24T10:00:00.000Z	33 \| good	6.495 \| good	28.462 \| good	8.496 \| good	2.567 \| good	21.599 \| good	0.354 \| good
2026-01-24T11:00:00.000Z	44 \| good	7.837 \| good	34.357 \| good	7.13 \| good	2.488 \| good	21.007 \| good	0.347 \| good
2026-01-24T12:00:00.000Z	44 \| good	8.177 \| good	36.332 \| good	4.661 \| good	2.41 \| good	20.415 \| good	0.339 \| good
2026-01-24T13:00:00.000Z	49 \| good	8.674 \| good	37.889 \| good	5.522 \| good	2.497 \| good	20.684 \| good	0.325 \| good
2026-01-24T14:00:00.000Z	49 \| good	8.924 \| good	39.925 \| good	4.63 \| good	2.584 \| good	20.953 \| good	0.311 \| good
2026-01-24T15:00:00.000Z	58 \| moderate	12.975 \| fine	58.311 \| fine	4.682 \| good	2.671 \| good	21.221 \| good	0.296 \| good
2026-01-24T16:00:00.000Z	56 \| moderate	11.621 \| good	52.164 \| good	8.126 \| good	2.391 \| good	18.541 \| good	0.278 \| good
2026-01-24T17:00:00.000Z	54 \| moderate	10.638 \| good	47.364 \| good	17.999 \| good	2.111 \| good	15.86 \| good	0.259 \| good
2026-01-24T18:00:00.000Z	27 \| good	4.885 \| good	21.422 \| good	24.399 \| good	1.831 \| good	13.18 \| good	0.241 \| good
2026-01-24T19:00:00.000Z	27 \| good	5.002 \| good	21.895 \| good	24.861 \| good	1.568 \| good	10.409 \| good	0.211 \| good
2026-01-24T20:00:00.000Z	25 \| good	4.091 \| good	17.821 \| good	27.15 \| good	1.306 \| good	7.638 \| good	0.181 \| good
2026-01-24T21:00:00.000Z	27 \| good	4.975 \| good	21.254 \| good	27.393 \| good	1.044 \| good	4.867 \| good	0.151 \| good
2026-01-24T22:00:00.000Z	28 \| good	1.9 \| good	8.129 \| good	29.538 \| good	1.029 \| good	5.288 \| good	0.15 \| good
2026-01-24T23:00:00.000Z	27 \| good	0.706 \| good	2.366 \| good	29.033 \| good	1.014 \| good	5.709 \| good	0.149 \| good
2026-01-25T00:00:00.000Z	28 \| good	0.997 \| good	4.107 \| good	29.621 \| good	0.999 \| good	6.129 \| good	0.148 \| good
2026-01-25T01:00:00.000Z	19 \| good	0.953 \| good	3.954 \| good	19.759 \| good	1.13 \| good	12.505 \| good	0.184 \| good
2026-01-25T02:00:00.000Z	22 \| good	4.392 \| good	18.879 \| good	11.713 \| good	1.26 \| good	18.881 \| good	0.22 \| good
2026-01-25T03:00:00.000Z	27 \| good	5.203 \| good	22.631 \| good	8.19 \| good	1.391 \| good	25.257 \| good	0.256 \| good
2026-01-25T04:00:00.000Z	25 \| good	4.273 \| good	18.686 \| good	7.433 \| good	1.461 \| good	26.323 \| good	0.269 \| good
2026-01-25T05:00:00.000Z	25 \| good	4.005 \| good	17.668 \| good	9.979 \| good	1.531 \| good	27.389 \| good	0.282 \| good
2026-01-25T06:00:00.000Z	26 \| good	2.907 \| good	12.322 \| good	11.411 \| good	1.601 \| good	28.456 \| good	0.295 \| good
2026-01-25T07:00:00.000Z	26 \| good	3.051 \| good	12.519 \| good	8.408 \| good	1.445 \| good	27.642 \| good	0.294 \| good
2026-01-25T08:00:00.000Z	25 \| good	3.474 \| good	15.149 \| good	7.158 \| good	1.29 \| good	26.828 \| good	0.293 \| good
2026-01-25T09:00:00.000Z	27 \| good	4.771 \| good	20.985 \| good	5.056 \| good	1.135 \| good	26.014 \| good	0.292 \| good
2026-01-25T10:00:00.000Z	24 \| good	3.342 \| good	14.494 \| good	3.358 \| good	1.037 \| good	24.767 \| good	0.28 \| good
2026-01-25T11:00:00.000Z	23 \| good	3.919 \| good	16.849 \| good	4.263 \| good	0.939 \| good	23.519 \| good	0.269 \| good
2026-01-25T12:00:00.000Z	22 \| good	3.601 \| good	15.589 \| good	3.051 \| good	0.842 \| good	22.272 \| good	0.257 \| good
2026-01-25T13:00:00.000Z	21 \| good	3.099 \| good	12.526 \| good	3.261 \| good	0.911 \| good	21.938 \| good	0.25 \| good
2026-01-25T14:00:00.000Z	21 \| good	2.181 \| good	8.796 \| good	3.969 \| good	0.981 \| good	21.604 \| good	0.243 \| good
2026-01-25T15:00:00.000Z	20 \| good	2.866 \| good	11.714 \| good	4.71 \| good	1.051 \| good	21.271 \| good	0.236 \| good
2026-01-25T16:00:00.000Z	22 \| good	3.632 \| good	15.933 \| good	5.685 \| good	1.137 \| good	19.433 \| good	0.246 \| good
2026-01-25T17:00:00.000Z	52 \| moderate	10.221 \| good	45.163 \| good	11.084 \| good	1.224 \| good	17.595 \| good	0.256 \| good
2026-01-25T18:00:00.000Z	44 \| good	8.059 \| good	35.4 \| good	16.551 \| good	1.31 \| good	15.757 \| good	0.266 \| good
2026-01-25T19:00:00.000Z	44 \| good	7.915 \| good	34.835 \| good	20.468 \| good	1.391 \| good	13.841 \| good	0.247 \| good
2026-01-25T20:00:00.000Z	44 \| good	7.921 \| good	34.737 \| good	23.782 \| good	1.473 \| good	11.925 \| good	0.229 \| good
2026-01-25T21:00:00.000Z	38 \| good	6.729 \| good	29.585 \| good	24.58 \| good	1.554 \| good	10.008 \| good	0.21 \| good
2026-01-25T22:00:00.000Z	27 \| good	4.629 \| good	20.279 \| good	28.588 \| good	1.576 \| good	11.049 \| good	0.215 \| good
2026-01-25T23:00:00.000Z	38 \| good	7.078 \| good	31.008 \| good	29.39 \| good	1.597 \| good	12.09 \| good	0.22 \| good
2026-01-26T00:00:00.000Z	60 \| moderate	13.576 \| fine	17.271 \| good	19.678 \| good	1.623 \| good	13.187 \| good	0.225 \| good
2026-01-26T01:00:00.000Z	54 \| moderate	11.091 \| good	48.969 \| good	15.005 \| good	1.682 \| good	16.68 \| good	0.276 \| good

Redwood City

Empower business decisions with accurate air quality data

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

0.47ppm

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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Check live rankings of places in the USA affected by air pollution.

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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 12:00:00 on 2026-01-24.

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 06:00:00 on 2026-01-23.

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

The real-time air quality index in Redwood City, California is 58, 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 12.606 μg/m³.

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

The current PM₁₀ levels in Redwood City, California are 57.025 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 0.4 ppm.

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

The current sulfur dioxide (SO₂) levels in Redwood City, California are 0.765 ppb.

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

The current ozone (O₃) levels at Redwood City, California is 16.004 ppm.

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

The current nitrogen dioxide (NO₂) levels at Redwood City, California is 8.109 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-01-22T02:00:00.000Z	60 \| moderate	14.497 \| fine	64.986 \| fine	5.011 \| good	0.788 \| good	22.381 \| good	0.799 \| good
2026-01-22T03:00:00.000Z	58 \| moderate	13.304 \| fine	61.003 \| fine	3.013 \| good	0.819 \| good	19.902 \| good	0.699 \| good
2026-01-22T04:00:00.000Z	56 \| moderate	11.806 \| good	52.03 \| good	3.015 \| good	0.782 \| good	20.999 \| good	0.6 \| good
2026-01-22T05:00:00.000Z	58 \| moderate	12.803 \| fine	57.009 \| fine	3.016 \| good	0.784 \| good	21.598 \| good	0.699 \| good
2026-01-22T06:00:00.000Z	60 \| moderate	14.499 \| fine	64.983 \| fine	1.016 \| good	0.845 \| good	19.403 \| good	0.999 \| good
2026-01-22T07:00:00.000Z	62 \| moderate	14.5 \| fine	64.996 \| fine	5.063 \| good	0.829 \| good	19.408 \| good	0.999 \| good
2026-01-22T08:00:00.000Z	62 \| moderate	14.6 \| fine	64.978 \| fine	4.511 \| good	0.906 \| good	17.21 \| good	0.999 \| good
2026-01-22T09:00:00.000Z	58 \| moderate	13.5 \| fine	61 \| fine	4.027 \| good	0.836 \| good	16.113 \| good	0.799 \| good
2026-01-22T10:00:00.000Z	60 \| moderate	14.101 \| fine	62.981 \| fine	6.148 \| good	0.845 \| good	14.711 \| good	0.699 \| good
2026-01-22T11:00:00.000Z	56 \| moderate	11.705 \| good	52.022 \| good	3.934 \| good	0.817 \| good	13.415 \| good	0.699 \| good
2026-01-22T12:00:00.000Z	56 \| moderate	11.805 \| good	52.018 \| good	3.576 \| good	0.806 \| good	13.412 \| good	0.699 \| good
2026-01-22T13:00:00.000Z	56 \| moderate	11.803 \| good	52.019 \| good	2.884 \| good	0.797 \| good	13.415 \| good	0.7 \| good
2026-01-22T14:00:00.000Z	54 \| moderate	10.909 \| good	48.03 \| good	2.993 \| good	0.769 \| good	12.412 \| good	0.699 \| good
2026-01-22T15:00:00.000Z	52 \| moderate	10.005 \| good	45.026 \| good	2.045 \| good	0.795 \| good	11.313 \| good	0.899 \| good
2026-01-22T16:00:00.000Z	52 \| moderate	10.405 \| good	46.023 \| good	1.014 \| good	0.767 \| good	16.105 \| good	1.199 \| good
2026-01-22T17:00:00.000Z	49 \| good	8.707 \| good	38.038 \| good	2.011 \| good	0.821 \| good	15.806 \| good	0.999 \| good
2026-01-22T18:00:00.000Z	66 \| moderate	17.29 \| fine	76.937 \| fine	3.013 \| good	0.953 \| good	11.708 \| good	0.6 \| good
2026-01-22T19:00:00.000Z	66 \| moderate	17.096 \| fine	76.975 \| fine	4.014 \| good	0.925 \| good	11.211 \| good	0.6 \| good
2026-01-22T20:00:00.000Z	64 \| moderate	15.505 \| fine	69.002 \| fine	5.008 \| good	1.078 \| good	12.804 \| good	0.6 \| good
2026-01-22T21:00:00.000Z	62 \| moderate	14.708 \| fine	65.013 \| fine	6.008 \| good	0.987 \| good	11.907 \| good	0.6 \| good
2026-01-22T22:00:00.000Z	58 \| moderate	13.31 \| fine	61.005 \| fine	9.004 \| good	0.801 \| good	11.106 \| good	0.5 \| good
2026-01-22T23:00:00.000Z	58 \| moderate	12.605 \| fine	57.019 \| fine	12.01 \| good	0.973 \| good	9.719 \| good	0.5 \| good
2026-01-23T00:00:00.000Z	56 \| moderate	12.31 \| fine	55.026 \| fine	16.002 \| good	0.907 \| good	9.911 \| good	0.5 \| good
2026-01-23T01:00:00.000Z	58 \| moderate	12.599 \| fine	56.985 \| fine	17.007 \| good	0.837 \| good	15.892 \| good	0.5 \| good
2026-01-23T02:00:00.000Z	58 \| moderate	13.297 \| fine	60.977 \| fine	16.013 \| good	1.417 \| good	17.591 \| good	0.599 \| good
2026-01-23T03:00:00.000Z	56 \| moderate	11.599 \| good	50.99 \| good	12.02 \| good	0.881 \| good	22.082 \| good	0.599 \| good
2026-01-23T04:00:00.000Z	52 \| moderate	10.305 \| good	46.012 \| good	12.015 \| good	0.731 \| good	19.89 \| good	0.699 \| good
2026-01-23T05:00:00.000Z	54 \| moderate	10.701 \| good	47.991 \| good	11.014 \| good	0.632 \| good	19.691 \| good	0.799 \| good
2026-01-23T06:00:00.000Z	56 \| moderate	11.602 \| good	50.999 \| good	7.018 \| good	0.549 \| good	19.585 \| good	0.799 \| good
2026-01-23T07:00:00.000Z	56 \| moderate	11.598 \| good	51.004 \| good	4.016 \| good	0.467 \| good	19.595 \| good	0.799 \| good
2026-01-23T08:00:00.000Z	58 \| moderate	13.298 \| fine	60.971 \| fine	3.018 \| good	0.488 \| good	15.103 \| good	0.699 \| good
2026-01-23T09:00:00.000Z	58 \| moderate	13.104 \| fine	58.984 \| fine	2.019 \| good	0.515 \| good	14.401 \| good	0.599 \| good
2026-01-23T10:00:00.000Z	56 \| moderate	11.706 \| good	52.011 \| good	1.022 \| good	0.583 \| good	11.306 \| good	0.6 \| good
2026-01-23T11:00:00.000Z	58 \| moderate	13.1 \| fine	59.009 \| fine	1.02 \| good	0.565 \| good	10.707 \| good	0.5 \| good
2026-01-23T12:00:00.000Z	52 \| moderate	9.609 \| good	43.031 \| good	9.959 \| good	0.381 \| good	10.704 \| good	0.5 \| good
2026-01-23T13:00:00.000Z	52 \| moderate	9.608 \| good	43.031 \| good	3.782 \| good	0.963 \| good	10.702 \| good	0.499 \| good
2026-01-23T14:00:00.000Z	49 \| good	9.104 \| good	41.007 \| good	2.02 \| good	0.912 \| good	11.9 \| good	0.499 \| good
2026-01-23T15:00:00.000Z	49 \| good	9.005 \| good	41.008 \| good	3.021 \| good	0.921 \| good	14.994 \| good	0.599 \| good
2026-01-23T16:00:00.000Z	49 \| good	8.504 \| good	37.009 \| good	3.029 \| good	0.781 \| good	16.387 \| good	0.599 \| good
2026-01-23T17:00:00.000Z	49 \| good	8.702 \| good	38.034 \| good	5.023 \| good	0.683 \| good	11.2 \| good	0.499 \| good
2026-01-23T18:00:00.000Z	49 \| good	8.703 \| good	38.015 \| good	8.016 \| good	0.651 \| good	11.198 \| good	0.499 \| good
2026-01-23T19:00:00.000Z	56 \| moderate	11.897 \| good	53.985 \| good	10.012 \| good	0.826 \| good	6.307 \| good	0.5 \| good
2026-01-23T20:00:00.000Z	58 \| moderate	12.897 \| fine	58.971 \| fine	13.006 \| good	1.082 \| good	8.401 \| good	0.499 \| good
2026-01-23T21:00:00.000Z	56 \| moderate	11.9 \| good	54.001 \| good	15.003 \| good	0.858 \| good	8.102 \| good	0.5 \| good
2026-01-23T22:00:00.000Z	58 \| moderate	13.397 \| fine	60.972 \| fine	17.998 \| good	0.768 \| good	8.002 \| good	0.5 \| good
2026-01-23T23:00:00.000Z	58 \| moderate	12.7 \| fine	56.99 \| fine	17.999 \| good	0.897 \| good	7.005 \| good	0.5 \| good
2026-01-24T00:00:00.000Z	60 \| moderate	14.297 \| fine	64.989 \| fine	17.003 \| good	0.884 \| good	6.307 \| good	0.499 \| good
2026-01-24T01:00:00.000Z	58 \| moderate	12.606 \| fine	57.025 \| fine	16.004 \| good	0.765 \| good	8.109 \| good	0.4 \| good
2026-01-24T01:00:00.000Z	58 \| moderate	12.606 \| fine	57.025 \| fine	16.004 \| good	0.765 \| good	8.109 \| good	0.4 \| good
2026-01-24T02:00:00.000Z	77 \| moderate	22.963 \| fine	100.806 \| fine	11.075 \| good	2.585 \| good	17.81 \| good	0.288 \| good
2026-01-24T03:00:00.000Z	69 \| moderate	18.511 \| fine	81.962 \| fine	13.082 \| good	2.581 \| good	21.927 \| good	0.322 \| good
2026-01-24T04:00:00.000Z	67 \| moderate	17.775 \| fine	78.516 \| fine	17.603 \| good	2.745 \| good	22.76 \| good	0.34 \| good
2026-01-24T05:00:00.000Z	66 \| moderate	16.977 \| fine	76.045 \| fine	19.041 \| good	2.909 \| good	23.593 \| good	0.357 \| good
2026-01-24T06:00:00.000Z	66 \| moderate	17.17 \| fine	76.439 \| fine	15.116 \| good	3.073 \| good	24.426 \| good	0.374 \| good
2026-01-24T07:00:00.000Z	64 \| moderate	15.741 \| fine	70.737 \| fine	13.56 \| good	2.931 \| good	23.681 \| good	0.37 \| good
2026-01-24T08:00:00.000Z	56 \| moderate	11.603 \| good	51.475 \| good	14.366 \| good	2.788 \| good	22.936 \| good	0.366 \| good
2026-01-24T09:00:00.000Z	52 \| moderate	9.82 \| good	43.613 \| good	10.528 \| good	2.645 \| good	22.191 \| good	0.362 \| good
2026-01-24T10:00:00.000Z	33 \| good	6.495 \| good	28.462 \| good	8.496 \| good	2.567 \| good	21.599 \| good	0.354 \| good
2026-01-24T11:00:00.000Z	44 \| good	7.837 \| good	34.357 \| good	7.13 \| good	2.488 \| good	21.007 \| good	0.347 \| good
2026-01-24T12:00:00.000Z	44 \| good	8.177 \| good	36.332 \| good	4.661 \| good	2.41 \| good	20.415 \| good	0.339 \| good
2026-01-24T13:00:00.000Z	49 \| good	8.674 \| good	37.889 \| good	5.522 \| good	2.497 \| good	20.684 \| good	0.325 \| good
2026-01-24T14:00:00.000Z	49 \| good	8.924 \| good	39.925 \| good	4.63 \| good	2.584 \| good	20.953 \| good	0.311 \| good
2026-01-24T15:00:00.000Z	58 \| moderate	12.975 \| fine	58.311 \| fine	4.682 \| good	2.671 \| good	21.221 \| good	0.296 \| good
2026-01-24T16:00:00.000Z	56 \| moderate	11.621 \| good	52.164 \| good	8.126 \| good	2.391 \| good	18.541 \| good	0.278 \| good
2026-01-24T17:00:00.000Z	54 \| moderate	10.638 \| good	47.364 \| good	17.999 \| good	2.111 \| good	15.86 \| good	0.259 \| good
2026-01-24T18:00:00.000Z	27 \| good	4.885 \| good	21.422 \| good	24.399 \| good	1.831 \| good	13.18 \| good	0.241 \| good
2026-01-24T19:00:00.000Z	27 \| good	5.002 \| good	21.895 \| good	24.861 \| good	1.568 \| good	10.409 \| good	0.211 \| good
2026-01-24T20:00:00.000Z	25 \| good	4.091 \| good	17.821 \| good	27.15 \| good	1.306 \| good	7.638 \| good	0.181 \| good
2026-01-24T21:00:00.000Z	27 \| good	4.975 \| good	21.254 \| good	27.393 \| good	1.044 \| good	4.867 \| good	0.151 \| good
2026-01-24T22:00:00.000Z	28 \| good	1.9 \| good	8.129 \| good	29.538 \| good	1.029 \| good	5.288 \| good	0.15 \| good
2026-01-24T23:00:00.000Z	27 \| good	0.706 \| good	2.366 \| good	29.033 \| good	1.014 \| good	5.709 \| good	0.149 \| good
2026-01-25T00:00:00.000Z	28 \| good	0.997 \| good	4.107 \| good	29.621 \| good	0.999 \| good	6.129 \| good	0.148 \| good
2026-01-25T01:00:00.000Z	19 \| good	0.953 \| good	3.954 \| good	19.759 \| good	1.13 \| good	12.505 \| good	0.184 \| good
2026-01-25T02:00:00.000Z	22 \| good	4.392 \| good	18.879 \| good	11.713 \| good	1.26 \| good	18.881 \| good	0.22 \| good
2026-01-25T03:00:00.000Z	27 \| good	5.203 \| good	22.631 \| good	8.19 \| good	1.391 \| good	25.257 \| good	0.256 \| good
2026-01-25T04:00:00.000Z	25 \| good	4.273 \| good	18.686 \| good	7.433 \| good	1.461 \| good	26.323 \| good	0.269 \| good
2026-01-25T05:00:00.000Z	25 \| good	4.005 \| good	17.668 \| good	9.979 \| good	1.531 \| good	27.389 \| good	0.282 \| good
2026-01-25T06:00:00.000Z	26 \| good	2.907 \| good	12.322 \| good	11.411 \| good	1.601 \| good	28.456 \| good	0.295 \| good
2026-01-25T07:00:00.000Z	26 \| good	3.051 \| good	12.519 \| good	8.408 \| good	1.445 \| good	27.642 \| good	0.294 \| good
2026-01-25T08:00:00.000Z	25 \| good	3.474 \| good	15.149 \| good	7.158 \| good	1.29 \| good	26.828 \| good	0.293 \| good
2026-01-25T09:00:00.000Z	27 \| good	4.771 \| good	20.985 \| good	5.056 \| good	1.135 \| good	26.014 \| good	0.292 \| good
2026-01-25T10:00:00.000Z	24 \| good	3.342 \| good	14.494 \| good	3.358 \| good	1.037 \| good	24.767 \| good	0.28 \| good
2026-01-25T11:00:00.000Z	23 \| good	3.919 \| good	16.849 \| good	4.263 \| good	0.939 \| good	23.519 \| good	0.269 \| good
2026-01-25T12:00:00.000Z	22 \| good	3.601 \| good	15.589 \| good	3.051 \| good	0.842 \| good	22.272 \| good	0.257 \| good
2026-01-25T13:00:00.000Z	21 \| good	3.099 \| good	12.526 \| good	3.261 \| good	0.911 \| good	21.938 \| good	0.25 \| good
2026-01-25T14:00:00.000Z	21 \| good	2.181 \| good	8.796 \| good	3.969 \| good	0.981 \| good	21.604 \| good	0.243 \| good
2026-01-25T15:00:00.000Z	20 \| good	2.866 \| good	11.714 \| good	4.71 \| good	1.051 \| good	21.271 \| good	0.236 \| good
2026-01-25T16:00:00.000Z	22 \| good	3.632 \| good	15.933 \| good	5.685 \| good	1.137 \| good	19.433 \| good	0.246 \| good
2026-01-25T17:00:00.000Z	52 \| moderate	10.221 \| good	45.163 \| good	11.084 \| good	1.224 \| good	17.595 \| good	0.256 \| good
2026-01-25T18:00:00.000Z	44 \| good	8.059 \| good	35.4 \| good	16.551 \| good	1.31 \| good	15.757 \| good	0.266 \| good
2026-01-25T19:00:00.000Z	44 \| good	7.915 \| good	34.835 \| good	20.468 \| good	1.391 \| good	13.841 \| good	0.247 \| good
2026-01-25T20:00:00.000Z	44 \| good	7.921 \| good	34.737 \| good	23.782 \| good	1.473 \| good	11.925 \| good	0.229 \| good
2026-01-25T21:00:00.000Z	38 \| good	6.729 \| good	29.585 \| good	24.58 \| good	1.554 \| good	10.008 \| good	0.21 \| good
2026-01-25T22:00:00.000Z	27 \| good	4.629 \| good	20.279 \| good	28.588 \| good	1.576 \| good	11.049 \| good	0.215 \| good
2026-01-25T23:00:00.000Z	38 \| good	7.078 \| good	31.008 \| good	29.39 \| good	1.597 \| good	12.09 \| good	0.22 \| good
2026-01-26T00:00:00.000Z	60 \| moderate	13.576 \| fine	17.271 \| good	19.678 \| good	1.623 \| good	13.187 \| good	0.225 \| good
2026-01-26T01:00:00.000Z	54 \| moderate	11.091 \| good	48.969 \| good	15.005 \| good	1.682 \| good	16.68 \| good	0.276 \| 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?