What is the sulfur dioxide (SO2) level in Castro Valley, California at the moment?

Currently, Castro Valley, California has a sulfur dioxide (SO2) concentration of 0.551 ppb.

What is the ozone (O3) level in Castro Valley, California at the moment?

The current ozone (O3) level in Castro Valley, California at the moment is 41.031 ppm.

What is the nitrogen dioxide (NO2) level in Castro Valley, California at the moment?

Nitrogen dioxide (NO2) level in Castro Valley, California at the moment is 2.252 ppb.

Live air quality index in Castro Valley, California today

Q: What is the PM2.5 level in Castro Valley, California at the moment?

PM2.5 levels in Castro Valley, California are currently 7.889 μg/m3.

Q: What is the PM10 level in Castro Valley, California at the moment?

The PM10 concentration in Castro Valley, California is 33.373 μg/m3 at the moment.

Stay updated with real-time air quality in Castro Valley, 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

Castro Valley, California

Last updated: ... (Local time)

Major air pollutants in Castro Valley, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

8.59 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

34.07 μg/m³

155

255

425

605+

Ozone (O₃)

41.01 ppb

201

201+

Sulfur Dioxide (SO₂)

0.70 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.40 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.29 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

High

Castro Valley, California

Get Live Pollen Counts

Castro Valley, California

Scroll To Air Quality Map

Track live Castro Valley, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-04-23T22:00:00.000Z	31 \| good	2.424 \| good	11.156 \| good	33.579 \| good	0.405 \| good	5.158 \| good	0.311 \| good
2026-04-23T23:00:00.000Z	34 \| good	2.837 \| good	14.479 \| good	37.188 \| good	0.293 \| good	5.534 \| good	0.312 \| good
2026-04-24T00:00:00.000Z	37 \| good	3.067 \| good	14.084 \| good	39.553 \| good	0.338 \| good	4.1 \| good	0.3 \| good
2026-04-24T01:00:00.000Z	37 \| good	3.076 \| good	11.944 \| good	40.179 \| good	0.33 \| good	3.647 \| good	0.308 \| good
2026-04-24T02:00:00.000Z	37 \| good	3.073 \| good	12.425 \| good	39.879 \| good	0.372 \| good	3.126 \| good	0.296 \| good
2026-04-24T03:00:00.000Z	31 \| good	4.298 \| good	19.034 \| good	33.285 \| good	0.962 \| good	9.261 \| good	0.174 \| good
2026-04-24T04:00:00.000Z	34 \| good	2.726 \| good	11.248 \| good	37.104 \| good	0.312 \| good	6.156 \| good	0.296 \| good
2026-04-24T05:00:00.000Z	33 \| good	5.448 \| good	24.603 \| good	35.55 \| good	0.372 \| good	5.737 \| good	0.305 \| good
2026-04-24T06:00:00.000Z	38 \| good	6.753 \| good	28.673 \| good	36.162 \| good	0.387 \| good	5.703 \| good	0.308 \| good
2026-04-24T07:00:00.000Z	38 \| good	6.616 \| good	28.847 \| good	37.106 \| good	0.54 \| good	5.162 \| good	0.3 \| good
2026-04-24T08:00:00.000Z	38 \| good	6.884 \| good	30.638 \| good	37.347 \| good	0.321 \| good	3.647 \| good	0.288 \| good
2026-04-24T09:00:00.000Z	38 \| good	7.288 \| good	30.837 \| good	37.727 \| good	0.344 \| good	2.706 \| good	0.288 \| good
2026-04-24T10:00:00.000Z	44 \| good	7.945 \| good	34.665 \| good	36.555 \| good	0.291 \| good	2.726 \| good	0.223 \| good
2026-04-24T11:00:00.000Z	44 \| good	8.043 \| good	33.933 \| good	37.379 \| good	0.281 \| good	3.022 \| good	0.288 \| good
2026-04-24T12:00:00.000Z	44 \| good	8.009 \| good	34.715 \| good	37.268 \| good	0.301 \| good	3.142 \| good	0.288 \| good
2026-04-24T13:00:00.000Z	44 \| good	7.869 \| good	35.254 \| good	39.547 \| good	0.328 \| good	3.428 \| good	0.288 \| good
2026-04-24T14:00:00.000Z	38 \| good	7.434 \| good	32.89 \| good	39.789 \| good	0.378 \| good	5.44 \| good	0.302 \| good
2026-04-24T15:00:00.000Z	49 \| good	8.502 \| good	37.523 \| good	39.425 \| good	0.302 \| good	6.396 \| good	0.302 \| good
2026-04-24T16:00:00.000Z	44 \| good	8.428 \| good	36.133 \| good	40.953 \| good	0.401 \| good	5.744 \| good	0.314 \| good
2026-04-24T17:00:00.000Z	40 \| good	6.563 \| good	28.442 \| good	42.552 \| good	0.356 \| good	3.665 \| good	0.302 \| good
2026-04-24T18:00:00.000Z	39 \| good	6.942 \| good	30.836 \| good	42.197 \| good	0.321 \| good	4.153 \| good	0.311 \| good
2026-04-24T19:00:00.000Z	44 \| good	8.245 \| good	37.041 \| good	42.065 \| good	0.305 \| good	4.117 \| good	0.3 \| good
2026-04-24T20:00:00.000Z	52 \| moderate	9.528 \| good	41.074 \| good	42.928 \| good	0.276 \| good	3.75 \| good	0.247 \| good
2026-04-24T21:00:00.000Z	49 \| good	9.147 \| good	37.251 \| good	42.444 \| good	0.388 \| good	3.207 \| good	0.3 \| good
2026-04-24T22:00:00.000Z	52 \| moderate	10.27 \| good	44.93 \| good	43.224 \| good	0.379 \| good	3.324 \| good	0.3 \| good
2026-04-24T23:00:00.000Z	52 \| moderate	9.975 \| good	45.132 \| good	42.535 \| good	0.263 \| good	2.83 \| good	0.3 \| good
2026-04-25T00:00:00.000Z	54 \| moderate	10.567 \| good	46.654 \| good	41.19 \| good	0.392 \| good	2.444 \| good	0.297 \| good
2026-04-25T01:00:00.000Z	49 \| good	9.439 \| good	42.17 \| good	40.685 \| good	0.372 \| good	2.556 \| good	0.308 \| good
2026-04-25T02:00:00.000Z	49 \| good	8.825 \| good	37.587 \| good	40.655 \| good	0.276 \| good	2.564 \| good	0.308 \| good
2026-04-25T03:00:00.000Z	49 \| good	8.882 \| good	38.526 \| good	39.857 \| good	0.406 \| good	2.299 \| good	0.311 \| good
2026-04-25T04:00:00.000Z	44 \| good	8.29 \| good	35.595 \| good	39.516 \| good	0.43 \| good	2.689 \| good	0.299 \| good
2026-04-25T05:00:00.000Z	44 \| good	8.23 \| good	33.56 \| good	39.271 \| good	0.376 \| good	3.141 \| good	0.288 \| good
2026-04-25T06:00:00.000Z	44 \| good	8.204 \| good	34.383 \| good	39.513 \| good	0.354 \| good	3.154 \| good	0.288 \| good
2026-04-25T07:00:00.000Z	44 \| good	8.003 \| good	36.174 \| good	39.845 \| good	0.244 \| good	2.41 \| good	0.288 \| good
2026-04-25T08:00:00.000Z	44 \| good	8.053 \| good	36.538 \| good	39.198 \| good	0.267 \| good	2.22 \| good	0.288 \| good
2026-04-25T09:00:00.000Z	44 \| good	7.536 \| good	32.395 \| good	39.233 \| good	0.267 \| good	2.199 \| good	0.288 \| good
2026-04-25T10:00:00.000Z	44 \| good	7.786 \| good	31.943 \| good	39.291 \| good	0.466 \| good	1.346 \| good	0.142 \| good
2026-04-25T11:00:00.000Z	36 \| good	5.203 \| good	17.959 \| good	39.33 \| good	0.536 \| good	1.545 \| good	0.13 \| good
2026-04-25T12:00:00.000Z	44 \| good	7.876 \| good	32.761 \| good	35.541 \| good	0.174 \| good	1.759 \| good	0.22 \| good
2026-04-25T13:00:00.000Z	38 \| good	7.026 \| good	31.792 \| good	40.925 \| good	0.386 \| good	1.534 \| good	0.214 \| good
2026-04-25T14:00:00.000Z	39 \| good	6.288 \| good	27.858 \| good	42.127 \| good	0.486 \| good	2.191 \| good	0.223 \| good
2026-04-25T15:00:00.000Z	44 \| good	7.711 \| good	34.565 \| good	41.689 \| good	0.378 \| good	2.885 \| good	0.223 \| good
2026-04-25T16:00:00.000Z	49 \| good	9.43 \| good	41.085 \| good	41.956 \| good	0.374 \| good	3.03 \| good	0.288 \| good
2026-04-25T17:00:00.000Z	44 \| good	8.448 \| good	38.54 \| good	41.193 \| good	0.555 \| good	2.961 \| good	0.288 \| good
2026-04-25T18:00:00.000Z	38 \| good	7.263 \| good	31.891 \| good	40.609 \| good	0.541 \| good	2.428 \| good	0.288 \| good
2026-04-25T19:00:00.000Z	44 \| good	8.433 \| good	36.802 \| good	41.413 \| good	0.544 \| good	2.341 \| good	0.288 \| good
2026-04-25T20:00:00.000Z	52 \| moderate	9.755 \| good	43.401 \| good	41.427 \| good	0.672 \| good	2.259 \| good	0.299 \| good
2026-04-25T21:00:00.000Z	49 \| good	9.082 \| good	38.883 \| good	41.404 \| good	0.745 \| good	2.379 \| good	0.299 \| good
2026-04-25T21:00:00.000Z	49 \| good	8.593 \| good	34.07 \| good	41.01 \| good	0.701 \| good	2.399 \| good	0.286 \| good
2026-04-25T21:00:00.000Z	39 \| good	4.876 \| good	20.972 \| good	41.511 \| good	0.613 \| good	2.455 \| good	0.125 \| good
2026-04-25T22:00:00.000Z	37 \| good	4.918 \| good	21.245 \| good	39.995 \| good	0.581 \| good	2.465 \| good	0.125 \| good
2026-04-25T23:00:00.000Z	37 \| good	4.442 \| good	19.183 \| good	40.327 \| good	0.55 \| good	2.475 \| good	0.124 \| good
2026-04-26T00:00:00.000Z	40 \| good	4.623 \| good	19.844 \| good	42.507 \| good	0.518 \| good	2.484 \| good	0.124 \| good
2026-04-26T01:00:00.000Z	41 \| good	4.371 \| good	19.061 \| good	44.145 \| good	0.521 \| good	3.196 \| good	0.127 \| good
2026-04-26T02:00:00.000Z	38 \| good	5.341 \| good	22.995 \| good	40.814 \| good	0.524 \| good	3.908 \| good	0.131 \| good
2026-04-26T03:00:00.000Z	37 \| good	5.173 \| good	22.113 \| good	40.215 \| good	0.527 \| good	4.62 \| good	0.134 \| good
2026-04-26T04:00:00.000Z	36 \| good	5.153 \| good	22.201 \| good	39.183 \| good	0.621 \| good	5.291 \| good	0.137 \| good
2026-04-26T05:00:00.000Z	36 \| good	5.089 \| good	22.177 \| good	39.049 \| good	0.715 \| good	5.963 \| good	0.139 \| good
2026-04-26T06:00:00.000Z	34 \| good	4.797 \| good	20.716 \| good	37.212 \| good	0.809 \| good	6.634 \| good	0.141 \| good
2026-04-26T07:00:00.000Z	31 \| good	4.382 \| good	19.085 \| good	34.432 \| good	0.825 \| good	7.191 \| good	0.145 \| good
2026-04-26T08:00:00.000Z	33 \| good	5.632 \| good	24.755 \| good	32.344 \| good	0.841 \| good	7.748 \| good	0.15 \| good
2026-04-26T09:00:00.000Z	29 \| good	5.338 \| good	23.054 \| good	31.308 \| good	0.857 \| good	8.306 \| good	0.154 \| good
2026-04-26T10:00:00.000Z	31 \| good	4.852 \| good	21.162 \| good	33.42 \| good	0.871 \| good	7.8 \| good	0.151 \| good
2026-04-26T11:00:00.000Z	32 \| good	3.763 \| good	16.742 \| good	34.934 \| good	0.885 \| good	7.294 \| good	0.149 \| good
2026-04-26T12:00:00.000Z	32 \| good	3.207 \| good	13.94 \| good	34.737 \| good	0.899 \| good	6.788 \| good	0.147 \| good
2026-04-26T13:00:00.000Z	32 \| good	3.314 \| good	14.352 \| good	35.032 \| good	0.92 \| good	6.541 \| good	0.148 \| good
2026-04-26T14:00:00.000Z	31 \| good	4.553 \| good	19.986 \| good	33.409 \| good	0.941 \| good	6.295 \| good	0.15 \| good
2026-04-26T15:00:00.000Z	33 \| good	5.617 \| good	24.085 \| good	35.639 \| good	0.962 \| good	6.048 \| good	0.151 \| good
2026-04-26T16:00:00.000Z	37 \| good	6.405 \| good	28.691 \| good	40.162 \| good	0.896 \| good	4.924 \| good	0.147 \| good
2026-04-26T17:00:00.000Z	42 \| good	6.845 \| good	30.156 \| good	45.006 \| good	0.831 \| good	3.799 \| good	0.143 \| good
2026-04-26T18:00:00.000Z	43 \| good	6.962 \| good	30.811 \| good	45.549 \| good	0.766 \| good	2.674 \| good	0.139 \| good
2026-04-26T19:00:00.000Z	43 \| good	6.825 \| good	29.99 \| good	46.086 \| good	0.722 \| good	2.223 \| good	0.136 \| good
2026-04-26T20:00:00.000Z	44 \| good	6.663 \| good	29.705 \| good	47.48 \| good	0.678 \| good	1.771 \| good	0.133 \| good
2026-04-26T21:00:00.000Z	46 \| good	5.862 \| good	25.96 \| good	50.096 \| good	0.633 \| good	1.32 \| good	0.13 \| good
2026-04-26T22:00:00.000Z	47 \| good	5.769 \| good	25.14 \| good	51.134 \| good	0.619 \| good	1.414 \| good	0.129 \| good
2026-04-26T23:00:00.000Z	47 \| good	5.529 \| good	23.568 \| good	50.996 \| good	0.605 \| good	1.509 \| good	0.129 \| good
2026-04-27T00:00:00.000Z	46 \| good	4.562 \| good	19.872 \| good	50.041 \| good	0.591 \| good	1.603 \| good	0.128 \| good
2026-04-27T01:00:00.000Z	45 \| good	4.572 \| good	19.769 \| good	49.373 \| good	0.614 \| good	2.556 \| good	0.131 \| good
2026-04-27T02:00:00.000Z	44 \| good	4.784 \| good	20.901 \| good	47.201 \| good	0.638 \| good	3.508 \| good	0.135 \| good
2026-04-27T03:00:00.000Z	40 \| good	5.425 \| good	22.977 \| good	42.534 \| good	0.661 \| good	4.461 \| good	0.138 \| good
2026-04-27T04:00:00.000Z	37 \| good	5.859 \| good	25.184 \| good	39.653 \| good	0.777 \| good	6.67 \| good	0.147 \| good
2026-04-27T05:00:00.000Z	34 \| good	5.405 \| good	23.333 \| good	37.002 \| good	0.893 \| good	8.88 \| good	0.156 \| good
2026-04-27T06:00:00.000Z	33 \| good	4.868 \| good	21.037 \| good	35.866 \| good	1.009 \| good	11.09 \| good	0.164 \| good
2026-04-27T07:00:00.000Z	32 \| good	5.077 \| good	21.839 \| good	35.312 \| good	1.002 \| good	11.176 \| good	0.166 \| good
2026-04-27T08:00:00.000Z	33 \| good	6.236 \| good	27.31 \| good	33.561 \| good	0.995 \| good	11.262 \| good	0.167 \| good
2026-04-27T09:00:00.000Z	33 \| good	6.335 \| good	28.051 \| good	31.236 \| good	0.988 \| good	11.348 \| good	0.168 \| good
2026-04-27T10:00:00.000Z	38 \| good	7.281 \| good	31.888 \| good	28.824 \| good	0.963 \| good	10.835 \| good	0.164 \| good
2026-04-27T11:00:00.000Z	38 \| good	7.405 \| good	32.613 \| good	28.299 \| good	0.938 \| good	10.321 \| good	0.161 \| good
2026-04-27T12:00:00.000Z	44 \| good	7.87 \| good	34.72 \| good	25.619 \| good	0.914 \| good	9.808 \| good	0.157 \| good
2026-04-27T13:00:00.000Z	44 \| good	8.498 \| good	37.348 \| good	26.154 \| good	0.96 \| good	9.735 \| good	0.163 \| good
2026-04-27T14:00:00.000Z	44 \| good	8.071 \| good	35.35 \| good	28.59 \| good	1.007 \| good	9.662 \| good	0.169 \| good
2026-04-27T15:00:00.000Z	38 \| good	7.16 \| good	31.643 \| good	34.948 \| good	1.054 \| good	9.589 \| good	0.174 \| good
2026-04-27T16:00:00.000Z	38 \| good	6.126 \| good	27.18 \| good	40.662 \| good	0.967 \| good	7.245 \| good	0.159 \| good
2026-04-27T17:00:00.000Z	39 \| good	7.293 \| good	32 \| good	41.818 \| good	0.88 \| good	4.902 \| good	0.143 \| good
2026-04-27T18:00:00.000Z	41 \| good	6.862 \| good	30.104 \| good	43.895 \| good	0.793 \| good	2.559 \| good	0.128 \| good
2026-04-27T19:00:00.000Z	43 \| good	6.63 \| good	29.474 \| good	45.814 \| good	0.779 \| good	2.239 \| good	0.127 \| good
2026-04-27T20:00:00.000Z	45 \| good	7.218 \| good	31.768 \| good	48.859 \| good	0.765 \| good	1.919 \| good	0.126 \| good

Castro Valley

Get reliable air quality data to drive your business

Castro Valley, California air quality map: Stay updated on AQI near you

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How accurate is California, USA air quality data?

Air quality and pollutant data for California, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

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Frequently asked questions

How often is air quality information updated for Castro Valley, California?

The air quality information for Castro Valley, California is updated every hour for accuracy.

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

In the past 24 hours, the air quality in Castro Valley, California was at its worst at 12:00:00 on 2026-04-25.

When did Castro Valley, California experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Castro Valley, California was observed at 09:00:00 on 2026-04-25.

What is the AQI in Castro Valley, California right now?

As of now, the AQI in Castro Valley, California is 44, indicating Good conditions.

What is the most common type of pollution in Castro Valley, California?

Castro Valley, California air has the highest levels of PM2.5.

What should I do in case of poor air quality in Castro Valley, California?

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

What is the PM_2.5 level in Castro Valley, California at the moment?

PM_2.5 levels in Castro Valley, California are currently 7.889 μg/m³.

What is the PM₁₀ level in Castro Valley, California at the moment?

The PM₁₀ concentration in Castro Valley, California is 33.373 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Castro Valley, California at the moment?

The current carbon monoxide (CO) concentration in Castro Valley, California is 0.272 ppm.

What is the sulfur dioxide (SO₂) level in Castro Valley, California at the moment?

Currently, Castro Valley, California has a sulfur dioxide (SO₂) concentration of 0.551 ppb.

What is the ozone (O₃) level in Castro Valley, California at the moment?

The current ozone (O₃) level in Castro Valley, California at the moment is 41.031 ppm.

What is the nitrogen dioxide (NO₂) level in Castro Valley, California at the moment?

Nitrogen dioxide (NO₂) level in Castro Valley, California at the moment is 2.252 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-04-23T22:00:00.000Z	31 \| good	2.424 \| good	11.156 \| good	33.579 \| good	0.405 \| good	5.158 \| good	0.311 \| good
2026-04-23T23:00:00.000Z	34 \| good	2.837 \| good	14.479 \| good	37.188 \| good	0.293 \| good	5.534 \| good	0.312 \| good
2026-04-24T00:00:00.000Z	37 \| good	3.067 \| good	14.084 \| good	39.553 \| good	0.338 \| good	4.1 \| good	0.3 \| good
2026-04-24T01:00:00.000Z	37 \| good	3.076 \| good	11.944 \| good	40.179 \| good	0.33 \| good	3.647 \| good	0.308 \| good
2026-04-24T02:00:00.000Z	37 \| good	3.073 \| good	12.425 \| good	39.879 \| good	0.372 \| good	3.126 \| good	0.296 \| good
2026-04-24T03:00:00.000Z	31 \| good	4.298 \| good	19.034 \| good	33.285 \| good	0.962 \| good	9.261 \| good	0.174 \| good
2026-04-24T04:00:00.000Z	34 \| good	2.726 \| good	11.248 \| good	37.104 \| good	0.312 \| good	6.156 \| good	0.296 \| good
2026-04-24T05:00:00.000Z	33 \| good	5.448 \| good	24.603 \| good	35.55 \| good	0.372 \| good	5.737 \| good	0.305 \| good
2026-04-24T06:00:00.000Z	38 \| good	6.753 \| good	28.673 \| good	36.162 \| good	0.387 \| good	5.703 \| good	0.308 \| good
2026-04-24T07:00:00.000Z	38 \| good	6.616 \| good	28.847 \| good	37.106 \| good	0.54 \| good	5.162 \| good	0.3 \| good
2026-04-24T08:00:00.000Z	38 \| good	6.884 \| good	30.638 \| good	37.347 \| good	0.321 \| good	3.647 \| good	0.288 \| good
2026-04-24T09:00:00.000Z	38 \| good	7.288 \| good	30.837 \| good	37.727 \| good	0.344 \| good	2.706 \| good	0.288 \| good
2026-04-24T10:00:00.000Z	44 \| good	7.945 \| good	34.665 \| good	36.555 \| good	0.291 \| good	2.726 \| good	0.223 \| good
2026-04-24T11:00:00.000Z	44 \| good	8.043 \| good	33.933 \| good	37.379 \| good	0.281 \| good	3.022 \| good	0.288 \| good
2026-04-24T12:00:00.000Z	44 \| good	8.009 \| good	34.715 \| good	37.268 \| good	0.301 \| good	3.142 \| good	0.288 \| good
2026-04-24T13:00:00.000Z	44 \| good	7.869 \| good	35.254 \| good	39.547 \| good	0.328 \| good	3.428 \| good	0.288 \| good
2026-04-24T14:00:00.000Z	38 \| good	7.434 \| good	32.89 \| good	39.789 \| good	0.378 \| good	5.44 \| good	0.302 \| good
2026-04-24T15:00:00.000Z	49 \| good	8.502 \| good	37.523 \| good	39.425 \| good	0.302 \| good	6.396 \| good	0.302 \| good
2026-04-24T16:00:00.000Z	44 \| good	8.428 \| good	36.133 \| good	40.953 \| good	0.401 \| good	5.744 \| good	0.314 \| good
2026-04-24T17:00:00.000Z	40 \| good	6.563 \| good	28.442 \| good	42.552 \| good	0.356 \| good	3.665 \| good	0.302 \| good
2026-04-24T18:00:00.000Z	39 \| good	6.942 \| good	30.836 \| good	42.197 \| good	0.321 \| good	4.153 \| good	0.311 \| good
2026-04-24T19:00:00.000Z	44 \| good	8.245 \| good	37.041 \| good	42.065 \| good	0.305 \| good	4.117 \| good	0.3 \| good
2026-04-24T20:00:00.000Z	52 \| moderate	9.528 \| good	41.074 \| good	42.928 \| good	0.276 \| good	3.75 \| good	0.247 \| good
2026-04-24T21:00:00.000Z	49 \| good	9.147 \| good	37.251 \| good	42.444 \| good	0.388 \| good	3.207 \| good	0.3 \| good
2026-04-24T22:00:00.000Z	52 \| moderate	10.27 \| good	44.93 \| good	43.224 \| good	0.379 \| good	3.324 \| good	0.3 \| good
2026-04-24T23:00:00.000Z	52 \| moderate	9.975 \| good	45.132 \| good	42.535 \| good	0.263 \| good	2.83 \| good	0.3 \| good
2026-04-25T00:00:00.000Z	54 \| moderate	10.567 \| good	46.654 \| good	41.19 \| good	0.392 \| good	2.444 \| good	0.297 \| good
2026-04-25T01:00:00.000Z	49 \| good	9.439 \| good	42.17 \| good	40.685 \| good	0.372 \| good	2.556 \| good	0.308 \| good
2026-04-25T02:00:00.000Z	49 \| good	8.825 \| good	37.587 \| good	40.655 \| good	0.276 \| good	2.564 \| good	0.308 \| good
2026-04-25T03:00:00.000Z	49 \| good	8.882 \| good	38.526 \| good	39.857 \| good	0.406 \| good	2.299 \| good	0.311 \| good
2026-04-25T04:00:00.000Z	44 \| good	8.29 \| good	35.595 \| good	39.516 \| good	0.43 \| good	2.689 \| good	0.299 \| good
2026-04-25T05:00:00.000Z	44 \| good	8.23 \| good	33.56 \| good	39.271 \| good	0.376 \| good	3.141 \| good	0.288 \| good
2026-04-25T06:00:00.000Z	44 \| good	8.204 \| good	34.383 \| good	39.513 \| good	0.354 \| good	3.154 \| good	0.288 \| good
2026-04-25T07:00:00.000Z	44 \| good	8.003 \| good	36.174 \| good	39.845 \| good	0.244 \| good	2.41 \| good	0.288 \| good
2026-04-25T08:00:00.000Z	44 \| good	8.053 \| good	36.538 \| good	39.198 \| good	0.267 \| good	2.22 \| good	0.288 \| good
2026-04-25T09:00:00.000Z	44 \| good	7.536 \| good	32.395 \| good	39.233 \| good	0.267 \| good	2.199 \| good	0.288 \| good
2026-04-25T10:00:00.000Z	44 \| good	7.786 \| good	31.943 \| good	39.291 \| good	0.466 \| good	1.346 \| good	0.142 \| good
2026-04-25T11:00:00.000Z	36 \| good	5.203 \| good	17.959 \| good	39.33 \| good	0.536 \| good	1.545 \| good	0.13 \| good
2026-04-25T12:00:00.000Z	44 \| good	7.876 \| good	32.761 \| good	35.541 \| good	0.174 \| good	1.759 \| good	0.22 \| good
2026-04-25T13:00:00.000Z	38 \| good	7.026 \| good	31.792 \| good	40.925 \| good	0.386 \| good	1.534 \| good	0.214 \| good
2026-04-25T14:00:00.000Z	39 \| good	6.288 \| good	27.858 \| good	42.127 \| good	0.486 \| good	2.191 \| good	0.223 \| good
2026-04-25T15:00:00.000Z	44 \| good	7.711 \| good	34.565 \| good	41.689 \| good	0.378 \| good	2.885 \| good	0.223 \| good
2026-04-25T16:00:00.000Z	49 \| good	9.43 \| good	41.085 \| good	41.956 \| good	0.374 \| good	3.03 \| good	0.288 \| good
2026-04-25T17:00:00.000Z	44 \| good	8.448 \| good	38.54 \| good	41.193 \| good	0.555 \| good	2.961 \| good	0.288 \| good
2026-04-25T18:00:00.000Z	38 \| good	7.263 \| good	31.891 \| good	40.609 \| good	0.541 \| good	2.428 \| good	0.288 \| good
2026-04-25T19:00:00.000Z	44 \| good	8.433 \| good	36.802 \| good	41.413 \| good	0.544 \| good	2.341 \| good	0.288 \| good
2026-04-25T20:00:00.000Z	52 \| moderate	9.755 \| good	43.401 \| good	41.427 \| good	0.672 \| good	2.259 \| good	0.299 \| good
2026-04-25T21:00:00.000Z	49 \| good	9.082 \| good	38.883 \| good	41.404 \| good	0.745 \| good	2.379 \| good	0.299 \| good
2026-04-25T21:00:00.000Z	49 \| good	8.593 \| good	34.07 \| good	41.01 \| good	0.701 \| good	2.399 \| good	0.286 \| good
2026-04-25T21:00:00.000Z	39 \| good	4.876 \| good	20.972 \| good	41.511 \| good	0.613 \| good	2.455 \| good	0.125 \| good
2026-04-25T22:00:00.000Z	37 \| good	4.918 \| good	21.245 \| good	39.995 \| good	0.581 \| good	2.465 \| good	0.125 \| good
2026-04-25T23:00:00.000Z	37 \| good	4.442 \| good	19.183 \| good	40.327 \| good	0.55 \| good	2.475 \| good	0.124 \| good
2026-04-26T00:00:00.000Z	40 \| good	4.623 \| good	19.844 \| good	42.507 \| good	0.518 \| good	2.484 \| good	0.124 \| good
2026-04-26T01:00:00.000Z	41 \| good	4.371 \| good	19.061 \| good	44.145 \| good	0.521 \| good	3.196 \| good	0.127 \| good
2026-04-26T02:00:00.000Z	38 \| good	5.341 \| good	22.995 \| good	40.814 \| good	0.524 \| good	3.908 \| good	0.131 \| good
2026-04-26T03:00:00.000Z	37 \| good	5.173 \| good	22.113 \| good	40.215 \| good	0.527 \| good	4.62 \| good	0.134 \| good
2026-04-26T04:00:00.000Z	36 \| good	5.153 \| good	22.201 \| good	39.183 \| good	0.621 \| good	5.291 \| good	0.137 \| good
2026-04-26T05:00:00.000Z	36 \| good	5.089 \| good	22.177 \| good	39.049 \| good	0.715 \| good	5.963 \| good	0.139 \| good
2026-04-26T06:00:00.000Z	34 \| good	4.797 \| good	20.716 \| good	37.212 \| good	0.809 \| good	6.634 \| good	0.141 \| good
2026-04-26T07:00:00.000Z	31 \| good	4.382 \| good	19.085 \| good	34.432 \| good	0.825 \| good	7.191 \| good	0.145 \| good
2026-04-26T08:00:00.000Z	33 \| good	5.632 \| good	24.755 \| good	32.344 \| good	0.841 \| good	7.748 \| good	0.15 \| good
2026-04-26T09:00:00.000Z	29 \| good	5.338 \| good	23.054 \| good	31.308 \| good	0.857 \| good	8.306 \| good	0.154 \| good
2026-04-26T10:00:00.000Z	31 \| good	4.852 \| good	21.162 \| good	33.42 \| good	0.871 \| good	7.8 \| good	0.151 \| good
2026-04-26T11:00:00.000Z	32 \| good	3.763 \| good	16.742 \| good	34.934 \| good	0.885 \| good	7.294 \| good	0.149 \| good
2026-04-26T12:00:00.000Z	32 \| good	3.207 \| good	13.94 \| good	34.737 \| good	0.899 \| good	6.788 \| good	0.147 \| good
2026-04-26T13:00:00.000Z	32 \| good	3.314 \| good	14.352 \| good	35.032 \| good	0.92 \| good	6.541 \| good	0.148 \| good
2026-04-26T14:00:00.000Z	31 \| good	4.553 \| good	19.986 \| good	33.409 \| good	0.941 \| good	6.295 \| good	0.15 \| good
2026-04-26T15:00:00.000Z	33 \| good	5.617 \| good	24.085 \| good	35.639 \| good	0.962 \| good	6.048 \| good	0.151 \| good
2026-04-26T16:00:00.000Z	37 \| good	6.405 \| good	28.691 \| good	40.162 \| good	0.896 \| good	4.924 \| good	0.147 \| good
2026-04-26T17:00:00.000Z	42 \| good	6.845 \| good	30.156 \| good	45.006 \| good	0.831 \| good	3.799 \| good	0.143 \| good
2026-04-26T18:00:00.000Z	43 \| good	6.962 \| good	30.811 \| good	45.549 \| good	0.766 \| good	2.674 \| good	0.139 \| good
2026-04-26T19:00:00.000Z	43 \| good	6.825 \| good	29.99 \| good	46.086 \| good	0.722 \| good	2.223 \| good	0.136 \| good
2026-04-26T20:00:00.000Z	44 \| good	6.663 \| good	29.705 \| good	47.48 \| good	0.678 \| good	1.771 \| good	0.133 \| good
2026-04-26T21:00:00.000Z	46 \| good	5.862 \| good	25.96 \| good	50.096 \| good	0.633 \| good	1.32 \| good	0.13 \| good
2026-04-26T22:00:00.000Z	47 \| good	5.769 \| good	25.14 \| good	51.134 \| good	0.619 \| good	1.414 \| good	0.129 \| good
2026-04-26T23:00:00.000Z	47 \| good	5.529 \| good	23.568 \| good	50.996 \| good	0.605 \| good	1.509 \| good	0.129 \| good
2026-04-27T00:00:00.000Z	46 \| good	4.562 \| good	19.872 \| good	50.041 \| good	0.591 \| good	1.603 \| good	0.128 \| good
2026-04-27T01:00:00.000Z	45 \| good	4.572 \| good	19.769 \| good	49.373 \| good	0.614 \| good	2.556 \| good	0.131 \| good
2026-04-27T02:00:00.000Z	44 \| good	4.784 \| good	20.901 \| good	47.201 \| good	0.638 \| good	3.508 \| good	0.135 \| good
2026-04-27T03:00:00.000Z	40 \| good	5.425 \| good	22.977 \| good	42.534 \| good	0.661 \| good	4.461 \| good	0.138 \| good
2026-04-27T04:00:00.000Z	37 \| good	5.859 \| good	25.184 \| good	39.653 \| good	0.777 \| good	6.67 \| good	0.147 \| good
2026-04-27T05:00:00.000Z	34 \| good	5.405 \| good	23.333 \| good	37.002 \| good	0.893 \| good	8.88 \| good	0.156 \| good
2026-04-27T06:00:00.000Z	33 \| good	4.868 \| good	21.037 \| good	35.866 \| good	1.009 \| good	11.09 \| good	0.164 \| good
2026-04-27T07:00:00.000Z	32 \| good	5.077 \| good	21.839 \| good	35.312 \| good	1.002 \| good	11.176 \| good	0.166 \| good
2026-04-27T08:00:00.000Z	33 \| good	6.236 \| good	27.31 \| good	33.561 \| good	0.995 \| good	11.262 \| good	0.167 \| good
2026-04-27T09:00:00.000Z	33 \| good	6.335 \| good	28.051 \| good	31.236 \| good	0.988 \| good	11.348 \| good	0.168 \| good
2026-04-27T10:00:00.000Z	38 \| good	7.281 \| good	31.888 \| good	28.824 \| good	0.963 \| good	10.835 \| good	0.164 \| good
2026-04-27T11:00:00.000Z	38 \| good	7.405 \| good	32.613 \| good	28.299 \| good	0.938 \| good	10.321 \| good	0.161 \| good
2026-04-27T12:00:00.000Z	44 \| good	7.87 \| good	34.72 \| good	25.619 \| good	0.914 \| good	9.808 \| good	0.157 \| good
2026-04-27T13:00:00.000Z	44 \| good	8.498 \| good	37.348 \| good	26.154 \| good	0.96 \| good	9.735 \| good	0.163 \| good
2026-04-27T14:00:00.000Z	44 \| good	8.071 \| good	35.35 \| good	28.59 \| good	1.007 \| good	9.662 \| good	0.169 \| good
2026-04-27T15:00:00.000Z	38 \| good	7.16 \| good	31.643 \| good	34.948 \| good	1.054 \| good	9.589 \| good	0.174 \| good
2026-04-27T16:00:00.000Z	38 \| good	6.126 \| good	27.18 \| good	40.662 \| good	0.967 \| good	7.245 \| good	0.159 \| good
2026-04-27T17:00:00.000Z	39 \| good	7.293 \| good	32 \| good	41.818 \| good	0.88 \| good	4.902 \| good	0.143 \| good
2026-04-27T18:00:00.000Z	41 \| good	6.862 \| good	30.104 \| good	43.895 \| good	0.793 \| good	2.559 \| good	0.128 \| good
2026-04-27T19:00:00.000Z	43 \| good	6.63 \| good	29.474 \| good	45.814 \| good	0.779 \| good	2.239 \| good	0.127 \| good
2026-04-27T20:00:00.000Z	45 \| good	7.218 \| good	31.768 \| good	48.859 \| good	0.765 \| good	1.919 \| good	0.126 \| good

Live air quality index in Castro Valley, California today

Major air pollutants in Castro Valley, California

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Castro Valley, California air quality map: Stay updated on AQI near you

Air quality in nearby cities

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Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

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What is the nitrogen dioxide (NO₂) level in Castro Valley, California at the moment?