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

The current PM10 levels in Redwood City, California are 28.009 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 0.762 ppb.

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

The current ozone (O3) levels at Redwood City, California is 6.006 ppm.

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

The current nitrogen dioxide (NO2) levels at Redwood City, California is 7.705 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 6.202 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)

Good

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)

5.11 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

22.03 μg/m³

155

255

425

605+

Ozone (O₃)

7.01 ppb

201

201+

Sulfur Dioxide (SO₂)

0.47 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

10.90 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
2025-12-12T03:00:00.000Z	73 \| moderate	20.7 \| fine	91.423 \| fine	2.802 \| good	2.074 \| good	23.795 \| good	0.431 \| good
2025-12-12T04:00:00.000Z	64 \| moderate	16.393 \| fine	72.959 \| fine	4.011 \| good	0.408 \| good	16.298 \| good	1.198 \| good
2025-12-12T05:00:00.000Z	71 \| moderate	20.181 \| fine	88.918 \| fine	2.02 \| good	0.414 \| good	13.602 \| good	0.999 \| good
2025-12-12T06:00:00.000Z	71 \| moderate	20.18 \| fine	88.915 \| fine	1.024 \| good	0.381 \| good	11.705 \| good	0.899 \| good
2025-12-12T07:00:00.000Z	73 \| moderate	21.076 \| fine	92.894 \| fine	1.022 \| good	0.362 \| good	11.705 \| good	0.899 \| good
2025-12-12T08:00:00.000Z	62 \| moderate	15.002 \| fine	67.003 \| fine	4.838 \| good	0.359 \| good	9.506 \| good	0.5 \| good
2025-12-12T09:00:00.000Z	62 \| moderate	15.005 \| fine	66.999 \| fine	4.97 \| good	0.345 \| good	9.004 \| good	0.5 \| good
2025-12-12T10:00:00.000Z	56 \| moderate	11.506 \| good	51.014 \| good	4.907 \| good	0.346 \| good	8.703 \| good	0.4 \| good
2025-12-12T11:00:00.000Z	52 \| moderate	10.204 \| good	45.003 \| good	5.01 \| good	0.349 \| good	8.703 \| good	0.4 \| good
2025-12-12T12:00:00.000Z	52 \| moderate	10.101 \| good	45.001 \| good	7.748 \| good	0.408 \| good	8.503 \| good	0.4 \| good
2025-12-12T13:00:00.000Z	52 \| moderate	10.1 \| good	44.992 \| good	8.162 \| good	0.514 \| good	8.501 \| good	0.4 \| good
2025-12-12T14:00:00.000Z	44 \| good	8.204 \| good	36.01 \| good	5.994 \| good	0.448 \| good	8.7 \| good	0.4 \| good
2025-12-12T15:00:00.000Z	44 \| good	7.6 \| good	33.998 \| good	6.085 \| good	0.428 \| good	9.798 \| good	0.5 \| good
2025-12-12T16:00:00.000Z	44 \| good	7.8 \| good	34.003 \| good	5.2 \| good	0.448 \| good	14.389 \| good	1.497 \| good
2025-12-12T17:00:00.000Z	44 \| good	8.396 \| good	36.977 \| good	1.016 \| good	0.426 \| good	13.991 \| good	0.998 \| good
2025-12-12T18:00:00.000Z	44 \| good	8.398 \| good	36.991 \| good	1.017 \| good	0.369 \| good	13.993 \| good	0.999 \| good
2025-12-12T19:00:00.000Z	38 \| good	6.8 \| good	29.996 \| good	3.014 \| good	0.484 \| good	5.805 \| good	0.2 \| good
2025-12-12T20:00:00.000Z	33 \| good	5.9 \| good	27.007 \| good	6.007 \| good	0.55 \| good	5.904 \| good	0.2 \| good
2025-12-12T21:00:00.000Z	33 \| good	5.901 \| good	26.996 \| good	7.006 \| good	0.569 \| good	6.6 \| good	0.2 \| good
2025-12-12T22:00:00.000Z	27 \| good	5.404 \| good	23.023 \| good	8.005 \| good	0.526 \| good	5.807 \| good	0.2 \| good
2025-12-12T23:00:00.000Z	27 \| good	5.307 \| good	23.03 \| good	8.004 \| good	0.505 \| good	6.608 \| good	0.2 \| good
2025-12-13T00:00:00.000Z	27 \| good	5.108 \| good	22.035 \| good	9.002 \| good	0.506 \| good	9.104 \| good	0.3 \| good
2025-12-13T01:00:00.000Z	27 \| good	5.011 \| good	22.039 \| good	8.008 \| good	0.55 \| good	11.999 \| good	0.3 \| good
2025-12-13T02:00:00.000Z	38 \| good	6.808 \| good	30.02 \| good	6.01 \| good	0.433 \| good	14.196 \| good	0.3 \| good
2025-12-13T03:00:00.000Z	69 \| moderate	18.653 \| fine	82.114 \| fine	2.037 \| good	1.872 \| good	23.542 \| good	0.442 \| good
2025-12-13T04:00:00.000Z	58 \| moderate	12.693 \| fine	56.97 \| fine	4.008 \| good	0.449 \| good	14.402 \| good	0.899 \| good
2025-12-13T05:00:00.000Z	60 \| moderate	13.791 \| fine	62.959 \| fine	3.011 \| good	0.462 \| good	12.705 \| good	0.699 \| good
2025-12-13T06:00:00.000Z	56 \| moderate	12.402 \| fine	57.008 \| fine	5.531 \| good	0.437 \| good	11.408 \| good	0.7 \| good
2025-12-13T07:00:00.000Z	56 \| moderate	12.4 \| fine	57.009 \| fine	3.659 \| good	0.448 \| good	11.407 \| good	0.7 \| good
2025-12-13T08:00:00.000Z	52 \| moderate	10.207 \| good	45.034 \| good	3.373 \| good	0.385 \| good	9.11 \| good	0.799 \| good
2025-12-13T09:00:00.000Z	52 \| moderate	10.206 \| good	45.038 \| good	4.069 \| good	0.427 \| good	9.11 \| good	0.799 \| good
2025-12-13T10:00:00.000Z	52 \| moderate	10.207 \| good	45.019 \| good	6.05 \| good	0.407 \| good	12.317 \| good	0.306 \| good
2025-12-13T11:00:00.000Z	57 \| moderate	5.116 \| good	66.629 \| fine	6.92 \| good	0.409 \| good	13.193 \| good	0.306 \| good
2025-12-13T12:00:00.000Z	58 \| moderate	12.799 \| fine	51.831 \| good	2.767 \| good	0.299 \| good	12.634 \| good	0.555 \| good
2025-12-13T13:00:00.000Z	38 \| good	7.308 \| good	32.018 \| good	6.67 \| good	0.432 \| good	7.208 \| good	0.4 \| good
2025-12-13T14:00:00.000Z	27 \| good	5.008 \| good	22.029 \| good	5.014 \| good	0.571 \| good	6.309 \| good	0.4 \| good
2025-12-13T15:00:00.000Z	33 \| good	5.506 \| good	24.008 \| good	4.727 \| good	0.542 \| good	8.803 \| good	0.5 \| good
2025-12-13T16:00:00.000Z	44 \| good	7.699 \| good	33.981 \| good	4.924 \| good	0.559 \| good	9.901 \| good	0.5 \| good
2025-12-13T17:00:00.000Z	49 \| good	8.793 \| good	38.965 \| good	1.011 \| good	0.525 \| good	10.398 \| good	0.4 \| good
2025-12-13T18:00:00.000Z	52 \| moderate	10.387 \| good	45.94 \| good	3.01 \| good	0.487 \| good	9.998 \| good	0.3 \| good
2025-12-13T19:00:00.000Z	56 \| moderate	11.685 \| good	51.938 \| good	3.012 \| good	0.615 \| good	10.892 \| good	0.4 \| good
2025-12-13T20:00:00.000Z	54 \| moderate	10.787 \| good	47.945 \| good	3.012 \| good	0.644 \| good	9.096 \| good	0.3 \| good
2025-12-13T21:00:00.000Z	44 \| good	8.395 \| good	36.977 \| good	5.007 \| good	0.779 \| good	8 \| good	0.3 \| good
2025-12-13T22:00:00.000Z	33 \| good	6.202 \| good	28.009 \| good	6.006 \| good	0.762 \| good	7.705 \| good	0.3 \| good
2025-12-13T23:00:00.000Z	38 \| good	6.601 \| good	30.002 \| good	7.007 \| good	0.638 \| good	6.906 \| good	0.3 \| good
2025-12-14T00:00:00.000Z	33 \| good	6.3 \| good	28.003 \| good	7.006 \| good	0.557 \| good	7.504 \| good	0.3 \| good
2025-12-14T01:00:00.000Z	27 \| good	5.106 \| good	22.026 \| good	7.007 \| good	0.47 \| good	10.898 \| good	0.3 \| good
2025-12-14T02:00:00.000Z	27 \| good	5.106 \| good	22.026 \| good	7.007 \| good	0.47 \| good	10.898 \| good	0.3 \| good
2025-12-14T00:00:00.000Z	75 \| moderate	21.593 \| fine	94.787 \| fine	10.763 \| good	1.67 \| good	13.921 \| good	0.247 \| good
2025-12-14T01:00:00.000Z	75 \| moderate	21.82 \| fine	96.628 \| fine	5.237 \| good	1.921 \| good	16.357 \| good	0.309 \| good
2025-12-14T02:00:00.000Z	81 \| moderate	25.159 \| fine	110.366 \| fine	2.602 \| good	2.171 \| good	18.793 \| good	0.37 \| good
2025-12-14T03:00:00.000Z	86 \| moderate	28.206 \| fine	122.443 \| fine	1.981 \| good	2.422 \| good	21.229 \| good	0.432 \| good
2025-12-14T04:00:00.000Z	96 \| moderate	33.221 \| fine	144.279 \| fine	1.539 \| good	2.518 \| good	21.495 \| good	0.449 \| good
2025-12-14T05:00:00.000Z	97 \| moderate	34.071 \| fine	146.337 \| fine	1.252 \| good	2.615 \| good	21.761 \| good	0.465 \| good
2025-12-14T06:00:00.000Z	88 \| moderate	29.285 \| fine	126.529 \| fine	0.806 \| good	2.711 \| good	22.027 \| good	0.481 \| good
2025-12-14T07:00:00.000Z	82 \| moderate	26.169 \| fine	114.453 \| fine	1.988 \| good	2.356 \| good	21.969 \| good	0.476 \| good
2025-12-14T08:00:00.000Z	82 \| moderate	25.858 \| fine	112.516 \| fine	5.376 \| good	2 \| good	21.911 \| good	0.471 \| good
2025-12-14T09:00:00.000Z	73 \| moderate	20.936 \| fine	92.758 \| fine	3.972 \| good	1.644 \| good	21.854 \| good	0.465 \| good
2025-12-14T10:00:00.000Z	73 \| moderate	21.495 \| fine	94.728 \| fine	3.114 \| good	1.468 \| good	20.229 \| good	0.443 \| good
2025-12-14T11:00:00.000Z	75 \| moderate	22.067 \| fine	96.861 \| fine	1.802 \| good	1.291 \| good	18.603 \| good	0.42 \| good
2025-12-14T12:00:00.000Z	79 \| moderate	23.703 \| fine	102.98 \| fine	1.703 \| good	1.114 \| good	16.978 \| good	0.398 \| good
2025-12-14T13:00:00.000Z	69 \| moderate	18.785 \| fine	83.28 \| fine	1.521 \| good	1.222 \| good	16.912 \| good	0.395 \| good
2025-12-14T14:00:00.000Z	79 \| moderate	24.106 \| fine	104.895 \| fine	1.787 \| good	1.33 \| good	16.846 \| good	0.392 \| good
2025-12-14T15:00:00.000Z	81 \| moderate	25.126 \| fine	110.582 \| fine	1.692 \| good	1.438 \| good	16.781 \| good	0.389 \| good
2025-12-14T16:00:00.000Z	86 \| moderate	27.96 \| fine	120.663 \| fine	2.406 \| good	1.79 \| good	17.282 \| good	0.393 \| good
2025-12-14T17:00:00.000Z	90 \| moderate	29.732 \| fine	128.86 \| fine	8.393 \| good	2.142 \| good	17.784 \| good	0.397 \| good
2025-12-14T18:00:00.000Z	84 \| moderate	26.735 \| fine	115.245 \| fine	16.101 \| good	2.494 \| good	18.285 \| good	0.401 \| good
2025-12-14T19:00:00.000Z	90 \| moderate	29.663 \| fine	128.585 \| fine	17.442 \| good	2.754 \| good	17.294 \| good	0.357 \| good
2025-12-14T20:00:00.000Z	86 \| moderate	28.073 \| fine	122.683 \| fine	19.027 \| good	3.014 \| good	16.303 \| good	0.313 \| good
2025-12-14T21:00:00.000Z	79 \| moderate	24.349 \| fine	106.986 \| fine	18.471 \| good	3.274 \| good	15.313 \| good	0.27 \| good
2025-12-14T22:00:00.000Z	92 \| moderate	31.108 \| fine	134.73 \| fine	17.28 \| good	3.357 \| good	16.971 \| good	0.272 \| good
2025-12-14T23:00:00.000Z	96 \| moderate	32.609 \| fine	140.981 \| fine	18.218 \| good	3.44 \| good	18.63 \| good	0.275 \| good
2025-12-15T00:00:00.000Z	115 \| sensitive	40.503 \| moderate	178.765 \| moderate	15.045 \| good	3.522 \| good	20.288 \| good	0.277 \| good
2025-12-15T01:00:00.000Z	123 \| sensitive	44.471 \| moderate	198.58 \| moderate	10.754 \| good	3.801 \| good	23.325 \| good	0.329 \| good
2025-12-15T02:00:00.000Z	129 \| sensitive	46.997 \| moderate	212.338 \| moderate	4.308 \| good	4.081 \| good	26.362 \| good	0.381 \| good
2025-12-15T03:00:00.000Z	137 \| sensitive	50.162 \| moderate	226.311 \| moderate	4.249 \| good	4.36 \| good	29.399 \| good	0.433 \| good
2025-12-15T04:00:00.000Z	147 \| sensitive	53.667 \| moderate	244.214 \| moderate	4.072 \| good	4.488 \| good	29.276 \| good	0.466 \| good
2025-12-15T05:00:00.000Z	151 \| unhealthy	55.707 \| poor	254.169 \| moderate	3.468 \| good	4.617 \| good	29.152 \| good	0.498 \| good
2025-12-15T06:00:00.000Z	145 \| sensitive	53.348 \| moderate	242.588 \| moderate	2.477 \| good	4.745 \| good	29.029 \| good	0.53 \| good
2025-12-15T07:00:00.000Z	144 \| sensitive	53.075 \| moderate	241.983 \| moderate	2.89 \| good	4.264 \| good	28.089 \| good	0.533 \| good
2025-12-15T08:00:00.000Z	150 \| sensitive	55.245 \| moderate	253.52 \| moderate	2.736 \| good	3.784 \| good	27.148 \| good	0.535 \| good
2025-12-15T09:00:00.000Z	137 \| sensitive	50.435 \| moderate	227.855 \| moderate	2.183 \| good	3.303 \| good	26.207 \| good	0.538 \| good
2025-12-15T10:00:00.000Z	139 \| sensitive	50.721 \| moderate	229.85 \| moderate	2.376 \| good	2.936 \| good	24.663 \| good	0.505 \| good
2025-12-15T11:00:00.000Z	137 \| sensitive	50.281 \| moderate	227.832 \| moderate	1.776 \| good	2.57 \| good	23.119 \| good	0.473 \| good
2025-12-15T12:00:00.000Z	139 \| sensitive	50.914 \| moderate	231.542 \| moderate	2.68 \| good	2.203 \| good	21.574 \| good	0.44 \| good
2025-12-15T13:00:00.000Z	132 \| sensitive	47.978 \| moderate	215.64 \| moderate	3.46 \| good	2.212 \| good	21.721 \| good	0.432 \| good
2025-12-15T14:00:00.000Z	128 \| sensitive	46.448 \| moderate	209.499 \| moderate	2.905 \| good	2.22 \| good	21.868 \| good	0.424 \| good
2025-12-15T15:00:00.000Z	129 \| sensitive	46.662 \| moderate	209.672 \| moderate	3.806 \| good	2.229 \| good	22.014 \| good	0.416 \| good
2025-12-15T16:00:00.000Z	137 \| sensitive	49.928 \| moderate	225.694 \| moderate	3.03 \| good	2.397 \| good	21.068 \| good	0.429 \| good
2025-12-15T17:00:00.000Z	108 \| sensitive	38.269 \| moderate	168.635 \| moderate	7.281 \| good	2.566 \| good	20.122 \| good	0.442 \| good
2025-12-15T18:00:00.000Z	77 \| moderate	22.875 \| fine	101.151 \| fine	11.578 \| good	2.735 \| good	19.176 \| good	0.455 \| good
2025-12-15T19:00:00.000Z	56 \| moderate	12.398 \| fine	55.81 \| fine	12.538 \| good	2.965 \| good	18.07 \| good	0.4 \| good
2025-12-15T20:00:00.000Z	52 \| moderate	9.748 \| good	43.749 \| good	15.496 \| good	3.195 \| good	16.964 \| good	0.344 \| good
2025-12-15T21:00:00.000Z	33 \| good	6.317 \| good	27.726 \| good	15.275 \| good	3.425 \| good	15.859 \| good	0.289 \| good
2025-12-15T22:00:00.000Z	52 \| moderate	9.924 \| good	44.349 \| good	14.203 \| good	3.335 \| good	16.976 \| good	0.284 \| good
2025-12-15T23:00:00.000Z	54 \| moderate	10.668 \| good	47.269 \| good	8.489 \| good	3.245 \| good	18.094 \| good	0.28 \| 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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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 03:00:00 on 2025-12-13.

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 10:00:00 on 2025-12-13.

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

The real-time air quality index in Redwood City, California is 33, currently categorized as Good.

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 6.202 μg/m³.

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

The current PM₁₀ levels in Redwood City, California are 28.009 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 0.762 ppb.

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

The current ozone (O₃) levels at Redwood City, California is 6.006 ppm.

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

The current nitrogen dioxide (NO₂) levels at Redwood City, California is 7.705 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-12T03:00:00.000Z	73 \| moderate	20.7 \| fine	91.423 \| fine	2.802 \| good	2.074 \| good	23.795 \| good	0.431 \| good
2025-12-12T04:00:00.000Z	64 \| moderate	16.393 \| fine	72.959 \| fine	4.011 \| good	0.408 \| good	16.298 \| good	1.198 \| good
2025-12-12T05:00:00.000Z	71 \| moderate	20.181 \| fine	88.918 \| fine	2.02 \| good	0.414 \| good	13.602 \| good	0.999 \| good
2025-12-12T06:00:00.000Z	71 \| moderate	20.18 \| fine	88.915 \| fine	1.024 \| good	0.381 \| good	11.705 \| good	0.899 \| good
2025-12-12T07:00:00.000Z	73 \| moderate	21.076 \| fine	92.894 \| fine	1.022 \| good	0.362 \| good	11.705 \| good	0.899 \| good
2025-12-12T08:00:00.000Z	62 \| moderate	15.002 \| fine	67.003 \| fine	4.838 \| good	0.359 \| good	9.506 \| good	0.5 \| good
2025-12-12T09:00:00.000Z	62 \| moderate	15.005 \| fine	66.999 \| fine	4.97 \| good	0.345 \| good	9.004 \| good	0.5 \| good
2025-12-12T10:00:00.000Z	56 \| moderate	11.506 \| good	51.014 \| good	4.907 \| good	0.346 \| good	8.703 \| good	0.4 \| good
2025-12-12T11:00:00.000Z	52 \| moderate	10.204 \| good	45.003 \| good	5.01 \| good	0.349 \| good	8.703 \| good	0.4 \| good
2025-12-12T12:00:00.000Z	52 \| moderate	10.101 \| good	45.001 \| good	7.748 \| good	0.408 \| good	8.503 \| good	0.4 \| good
2025-12-12T13:00:00.000Z	52 \| moderate	10.1 \| good	44.992 \| good	8.162 \| good	0.514 \| good	8.501 \| good	0.4 \| good
2025-12-12T14:00:00.000Z	44 \| good	8.204 \| good	36.01 \| good	5.994 \| good	0.448 \| good	8.7 \| good	0.4 \| good
2025-12-12T15:00:00.000Z	44 \| good	7.6 \| good	33.998 \| good	6.085 \| good	0.428 \| good	9.798 \| good	0.5 \| good
2025-12-12T16:00:00.000Z	44 \| good	7.8 \| good	34.003 \| good	5.2 \| good	0.448 \| good	14.389 \| good	1.497 \| good
2025-12-12T17:00:00.000Z	44 \| good	8.396 \| good	36.977 \| good	1.016 \| good	0.426 \| good	13.991 \| good	0.998 \| good
2025-12-12T18:00:00.000Z	44 \| good	8.398 \| good	36.991 \| good	1.017 \| good	0.369 \| good	13.993 \| good	0.999 \| good
2025-12-12T19:00:00.000Z	38 \| good	6.8 \| good	29.996 \| good	3.014 \| good	0.484 \| good	5.805 \| good	0.2 \| good
2025-12-12T20:00:00.000Z	33 \| good	5.9 \| good	27.007 \| good	6.007 \| good	0.55 \| good	5.904 \| good	0.2 \| good
2025-12-12T21:00:00.000Z	33 \| good	5.901 \| good	26.996 \| good	7.006 \| good	0.569 \| good	6.6 \| good	0.2 \| good
2025-12-12T22:00:00.000Z	27 \| good	5.404 \| good	23.023 \| good	8.005 \| good	0.526 \| good	5.807 \| good	0.2 \| good
2025-12-12T23:00:00.000Z	27 \| good	5.307 \| good	23.03 \| good	8.004 \| good	0.505 \| good	6.608 \| good	0.2 \| good
2025-12-13T00:00:00.000Z	27 \| good	5.108 \| good	22.035 \| good	9.002 \| good	0.506 \| good	9.104 \| good	0.3 \| good
2025-12-13T01:00:00.000Z	27 \| good	5.011 \| good	22.039 \| good	8.008 \| good	0.55 \| good	11.999 \| good	0.3 \| good
2025-12-13T02:00:00.000Z	38 \| good	6.808 \| good	30.02 \| good	6.01 \| good	0.433 \| good	14.196 \| good	0.3 \| good
2025-12-13T03:00:00.000Z	69 \| moderate	18.653 \| fine	82.114 \| fine	2.037 \| good	1.872 \| good	23.542 \| good	0.442 \| good
2025-12-13T04:00:00.000Z	58 \| moderate	12.693 \| fine	56.97 \| fine	4.008 \| good	0.449 \| good	14.402 \| good	0.899 \| good
2025-12-13T05:00:00.000Z	60 \| moderate	13.791 \| fine	62.959 \| fine	3.011 \| good	0.462 \| good	12.705 \| good	0.699 \| good
2025-12-13T06:00:00.000Z	56 \| moderate	12.402 \| fine	57.008 \| fine	5.531 \| good	0.437 \| good	11.408 \| good	0.7 \| good
2025-12-13T07:00:00.000Z	56 \| moderate	12.4 \| fine	57.009 \| fine	3.659 \| good	0.448 \| good	11.407 \| good	0.7 \| good
2025-12-13T08:00:00.000Z	52 \| moderate	10.207 \| good	45.034 \| good	3.373 \| good	0.385 \| good	9.11 \| good	0.799 \| good
2025-12-13T09:00:00.000Z	52 \| moderate	10.206 \| good	45.038 \| good	4.069 \| good	0.427 \| good	9.11 \| good	0.799 \| good
2025-12-13T10:00:00.000Z	52 \| moderate	10.207 \| good	45.019 \| good	6.05 \| good	0.407 \| good	12.317 \| good	0.306 \| good
2025-12-13T11:00:00.000Z	57 \| moderate	5.116 \| good	66.629 \| fine	6.92 \| good	0.409 \| good	13.193 \| good	0.306 \| good
2025-12-13T12:00:00.000Z	58 \| moderate	12.799 \| fine	51.831 \| good	2.767 \| good	0.299 \| good	12.634 \| good	0.555 \| good
2025-12-13T13:00:00.000Z	38 \| good	7.308 \| good	32.018 \| good	6.67 \| good	0.432 \| good	7.208 \| good	0.4 \| good
2025-12-13T14:00:00.000Z	27 \| good	5.008 \| good	22.029 \| good	5.014 \| good	0.571 \| good	6.309 \| good	0.4 \| good
2025-12-13T15:00:00.000Z	33 \| good	5.506 \| good	24.008 \| good	4.727 \| good	0.542 \| good	8.803 \| good	0.5 \| good
2025-12-13T16:00:00.000Z	44 \| good	7.699 \| good	33.981 \| good	4.924 \| good	0.559 \| good	9.901 \| good	0.5 \| good
2025-12-13T17:00:00.000Z	49 \| good	8.793 \| good	38.965 \| good	1.011 \| good	0.525 \| good	10.398 \| good	0.4 \| good
2025-12-13T18:00:00.000Z	52 \| moderate	10.387 \| good	45.94 \| good	3.01 \| good	0.487 \| good	9.998 \| good	0.3 \| good
2025-12-13T19:00:00.000Z	56 \| moderate	11.685 \| good	51.938 \| good	3.012 \| good	0.615 \| good	10.892 \| good	0.4 \| good
2025-12-13T20:00:00.000Z	54 \| moderate	10.787 \| good	47.945 \| good	3.012 \| good	0.644 \| good	9.096 \| good	0.3 \| good
2025-12-13T21:00:00.000Z	44 \| good	8.395 \| good	36.977 \| good	5.007 \| good	0.779 \| good	8 \| good	0.3 \| good
2025-12-13T22:00:00.000Z	33 \| good	6.202 \| good	28.009 \| good	6.006 \| good	0.762 \| good	7.705 \| good	0.3 \| good
2025-12-13T23:00:00.000Z	38 \| good	6.601 \| good	30.002 \| good	7.007 \| good	0.638 \| good	6.906 \| good	0.3 \| good
2025-12-14T00:00:00.000Z	33 \| good	6.3 \| good	28.003 \| good	7.006 \| good	0.557 \| good	7.504 \| good	0.3 \| good
2025-12-14T01:00:00.000Z	27 \| good	5.106 \| good	22.026 \| good	7.007 \| good	0.47 \| good	10.898 \| good	0.3 \| good
2025-12-14T02:00:00.000Z	27 \| good	5.106 \| good	22.026 \| good	7.007 \| good	0.47 \| good	10.898 \| good	0.3 \| good
2025-12-14T00:00:00.000Z	75 \| moderate	21.593 \| fine	94.787 \| fine	10.763 \| good	1.67 \| good	13.921 \| good	0.247 \| good
2025-12-14T01:00:00.000Z	75 \| moderate	21.82 \| fine	96.628 \| fine	5.237 \| good	1.921 \| good	16.357 \| good	0.309 \| good
2025-12-14T02:00:00.000Z	81 \| moderate	25.159 \| fine	110.366 \| fine	2.602 \| good	2.171 \| good	18.793 \| good	0.37 \| good
2025-12-14T03:00:00.000Z	86 \| moderate	28.206 \| fine	122.443 \| fine	1.981 \| good	2.422 \| good	21.229 \| good	0.432 \| good
2025-12-14T04:00:00.000Z	96 \| moderate	33.221 \| fine	144.279 \| fine	1.539 \| good	2.518 \| good	21.495 \| good	0.449 \| good
2025-12-14T05:00:00.000Z	97 \| moderate	34.071 \| fine	146.337 \| fine	1.252 \| good	2.615 \| good	21.761 \| good	0.465 \| good
2025-12-14T06:00:00.000Z	88 \| moderate	29.285 \| fine	126.529 \| fine	0.806 \| good	2.711 \| good	22.027 \| good	0.481 \| good
2025-12-14T07:00:00.000Z	82 \| moderate	26.169 \| fine	114.453 \| fine	1.988 \| good	2.356 \| good	21.969 \| good	0.476 \| good
2025-12-14T08:00:00.000Z	82 \| moderate	25.858 \| fine	112.516 \| fine	5.376 \| good	2 \| good	21.911 \| good	0.471 \| good
2025-12-14T09:00:00.000Z	73 \| moderate	20.936 \| fine	92.758 \| fine	3.972 \| good	1.644 \| good	21.854 \| good	0.465 \| good
2025-12-14T10:00:00.000Z	73 \| moderate	21.495 \| fine	94.728 \| fine	3.114 \| good	1.468 \| good	20.229 \| good	0.443 \| good
2025-12-14T11:00:00.000Z	75 \| moderate	22.067 \| fine	96.861 \| fine	1.802 \| good	1.291 \| good	18.603 \| good	0.42 \| good
2025-12-14T12:00:00.000Z	79 \| moderate	23.703 \| fine	102.98 \| fine	1.703 \| good	1.114 \| good	16.978 \| good	0.398 \| good
2025-12-14T13:00:00.000Z	69 \| moderate	18.785 \| fine	83.28 \| fine	1.521 \| good	1.222 \| good	16.912 \| good	0.395 \| good
2025-12-14T14:00:00.000Z	79 \| moderate	24.106 \| fine	104.895 \| fine	1.787 \| good	1.33 \| good	16.846 \| good	0.392 \| good
2025-12-14T15:00:00.000Z	81 \| moderate	25.126 \| fine	110.582 \| fine	1.692 \| good	1.438 \| good	16.781 \| good	0.389 \| good
2025-12-14T16:00:00.000Z	86 \| moderate	27.96 \| fine	120.663 \| fine	2.406 \| good	1.79 \| good	17.282 \| good	0.393 \| good
2025-12-14T17:00:00.000Z	90 \| moderate	29.732 \| fine	128.86 \| fine	8.393 \| good	2.142 \| good	17.784 \| good	0.397 \| good
2025-12-14T18:00:00.000Z	84 \| moderate	26.735 \| fine	115.245 \| fine	16.101 \| good	2.494 \| good	18.285 \| good	0.401 \| good
2025-12-14T19:00:00.000Z	90 \| moderate	29.663 \| fine	128.585 \| fine	17.442 \| good	2.754 \| good	17.294 \| good	0.357 \| good
2025-12-14T20:00:00.000Z	86 \| moderate	28.073 \| fine	122.683 \| fine	19.027 \| good	3.014 \| good	16.303 \| good	0.313 \| good
2025-12-14T21:00:00.000Z	79 \| moderate	24.349 \| fine	106.986 \| fine	18.471 \| good	3.274 \| good	15.313 \| good	0.27 \| good
2025-12-14T22:00:00.000Z	92 \| moderate	31.108 \| fine	134.73 \| fine	17.28 \| good	3.357 \| good	16.971 \| good	0.272 \| good
2025-12-14T23:00:00.000Z	96 \| moderate	32.609 \| fine	140.981 \| fine	18.218 \| good	3.44 \| good	18.63 \| good	0.275 \| good
2025-12-15T00:00:00.000Z	115 \| sensitive	40.503 \| moderate	178.765 \| moderate	15.045 \| good	3.522 \| good	20.288 \| good	0.277 \| good
2025-12-15T01:00:00.000Z	123 \| sensitive	44.471 \| moderate	198.58 \| moderate	10.754 \| good	3.801 \| good	23.325 \| good	0.329 \| good
2025-12-15T02:00:00.000Z	129 \| sensitive	46.997 \| moderate	212.338 \| moderate	4.308 \| good	4.081 \| good	26.362 \| good	0.381 \| good
2025-12-15T03:00:00.000Z	137 \| sensitive	50.162 \| moderate	226.311 \| moderate	4.249 \| good	4.36 \| good	29.399 \| good	0.433 \| good
2025-12-15T04:00:00.000Z	147 \| sensitive	53.667 \| moderate	244.214 \| moderate	4.072 \| good	4.488 \| good	29.276 \| good	0.466 \| good
2025-12-15T05:00:00.000Z	151 \| unhealthy	55.707 \| poor	254.169 \| moderate	3.468 \| good	4.617 \| good	29.152 \| good	0.498 \| good
2025-12-15T06:00:00.000Z	145 \| sensitive	53.348 \| moderate	242.588 \| moderate	2.477 \| good	4.745 \| good	29.029 \| good	0.53 \| good
2025-12-15T07:00:00.000Z	144 \| sensitive	53.075 \| moderate	241.983 \| moderate	2.89 \| good	4.264 \| good	28.089 \| good	0.533 \| good
2025-12-15T08:00:00.000Z	150 \| sensitive	55.245 \| moderate	253.52 \| moderate	2.736 \| good	3.784 \| good	27.148 \| good	0.535 \| good
2025-12-15T09:00:00.000Z	137 \| sensitive	50.435 \| moderate	227.855 \| moderate	2.183 \| good	3.303 \| good	26.207 \| good	0.538 \| good
2025-12-15T10:00:00.000Z	139 \| sensitive	50.721 \| moderate	229.85 \| moderate	2.376 \| good	2.936 \| good	24.663 \| good	0.505 \| good
2025-12-15T11:00:00.000Z	137 \| sensitive	50.281 \| moderate	227.832 \| moderate	1.776 \| good	2.57 \| good	23.119 \| good	0.473 \| good
2025-12-15T12:00:00.000Z	139 \| sensitive	50.914 \| moderate	231.542 \| moderate	2.68 \| good	2.203 \| good	21.574 \| good	0.44 \| good
2025-12-15T13:00:00.000Z	132 \| sensitive	47.978 \| moderate	215.64 \| moderate	3.46 \| good	2.212 \| good	21.721 \| good	0.432 \| good
2025-12-15T14:00:00.000Z	128 \| sensitive	46.448 \| moderate	209.499 \| moderate	2.905 \| good	2.22 \| good	21.868 \| good	0.424 \| good
2025-12-15T15:00:00.000Z	129 \| sensitive	46.662 \| moderate	209.672 \| moderate	3.806 \| good	2.229 \| good	22.014 \| good	0.416 \| good
2025-12-15T16:00:00.000Z	137 \| sensitive	49.928 \| moderate	225.694 \| moderate	3.03 \| good	2.397 \| good	21.068 \| good	0.429 \| good
2025-12-15T17:00:00.000Z	108 \| sensitive	38.269 \| moderate	168.635 \| moderate	7.281 \| good	2.566 \| good	20.122 \| good	0.442 \| good
2025-12-15T18:00:00.000Z	77 \| moderate	22.875 \| fine	101.151 \| fine	11.578 \| good	2.735 \| good	19.176 \| good	0.455 \| good
2025-12-15T19:00:00.000Z	56 \| moderate	12.398 \| fine	55.81 \| fine	12.538 \| good	2.965 \| good	18.07 \| good	0.4 \| good
2025-12-15T20:00:00.000Z	52 \| moderate	9.748 \| good	43.749 \| good	15.496 \| good	3.195 \| good	16.964 \| good	0.344 \| good
2025-12-15T21:00:00.000Z	33 \| good	6.317 \| good	27.726 \| good	15.275 \| good	3.425 \| good	15.859 \| good	0.289 \| good
2025-12-15T22:00:00.000Z	52 \| moderate	9.924 \| good	44.349 \| good	14.203 \| good	3.335 \| good	16.976 \| good	0.284 \| good
2025-12-15T23:00:00.000Z	54 \| moderate	10.668 \| good	47.269 \| good	8.489 \| good	3.245 \| good	18.094 \| good	0.28 \| 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?