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 0.872 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 32.064 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 5.713 ppb.

Real-time air quality index in Castro Valley, California today

Name: Live air pollution levels in Castro Valley, California today
Creator: Ambee

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)

7.76 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

33.90 μg/m³

155

255

425

605+

Ozone (O₃)

32.06 ppb

201

201+

Sulfur Dioxide (SO₂)

0.87 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.71 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.36 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

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
2025-06-04T23:00:00.000Z	62 \| moderate	15.168 \| fine	67.773 \| fine	37.949 \| good	0.849 \| good	4.541 \| good	0.333 \| good
2025-06-05T00:00:00.000Z	60 \| moderate	14.286 \| fine	53.946 \| good	37.696 \| good	0.833 \| good	4.978 \| good	0.303 \| good
2025-06-05T01:00:00.000Z	58 \| moderate	12.949 \| fine	51.345 \| good	38.102 \| good	0.789 \| good	3.665 \| good	0.33 \| good
2025-06-05T02:00:00.000Z	56 \| moderate	12.143 \| fine	50.298 \| good	37.042 \| good	0.895 \| good	3.634 \| good	0.33 \| good
2025-06-05T03:00:00.000Z	56 \| moderate	11.747 \| good	51.931 \| good	35.354 \| good	0.808 \| good	5.072 \| good	0.334 \| good
2025-06-05T04:00:00.000Z	52 \| moderate	10.478 \| good	42.791 \| good	33.941 \| good	0.727 \| good	6.974 \| good	0.334 \| good
2025-06-05T05:00:00.000Z	52 \| moderate	9.867 \| good	41.559 \| good	32.176 \| good	0.721 \| good	6.029 \| good	0.361 \| good
2025-06-05T06:00:00.000Z	52 \| moderate	9.878 \| good	42.98 \| good	29.667 \| good	0.687 \| good	5.203 \| good	0.301 \| good
2025-06-05T07:00:00.000Z	52 \| moderate	9.943 \| good	51.455 \| good	26.879 \| good	0.696 \| good	4.933 \| good	0.301 \| good
2025-06-05T08:00:00.000Z	52 \| moderate	9.526 \| good	41.322 \| good	26.868 \| good	0.72 \| good	5.144 \| good	0.27 \| good
2025-06-05T09:00:00.000Z	44 \| good	8.109 \| good	38.911 \| good	26.644 \| good	0.775 \| good	4.044 \| good	0.276 \| good
2025-06-05T10:00:00.000Z	52 \| moderate	9.664 \| good	50.91 \| good	26.307 \| good	0.914 \| good	3.899 \| good	0.214 \| good
2025-06-05T11:00:00.000Z	49 \| good	9.076 \| good	37.664 \| good	27.009 \| good	0.901 \| good	4.32 \| good	0.214 \| good
2025-06-05T12:00:00.000Z	49 \| good	9.26 \| good	34.918 \| good	26.767 \| good	1.06 \| good	4.762 \| good	0.214 \| good
2025-06-05T13:00:00.000Z	52 \| moderate	10.221 \| good	47.584 \| good	25.347 \| good	1.579 \| good	3.297 \| good	0.256 \| good
2025-06-05T14:00:00.000Z	44 \| good	8.302 \| good	36.871 \| good	26.844 \| good	1.104 \| good	4.798 \| good	0.275 \| good
2025-06-05T15:00:00.000Z	38 \| good	7.414 \| good	34.009 \| good	27.401 \| good	1.113 \| good	4.233 \| good	0.243 \| good
2025-06-05T16:00:00.000Z	44 \| good	8.114 \| good	33.046 \| good	27.25 \| good	1.103 \| good	5.809 \| good	0.261 \| good
2025-06-05T17:00:00.000Z	44 \| good	7.633 \| good	33.552 \| good	28.272 \| good	1.14 \| good	5.765 \| good	0.302 \| good
2025-06-05T18:00:00.000Z	44 \| good	8.492 \| good	38.938 \| good	30.504 \| good	1.08 \| good	5.345 \| good	0.303 \| good
2025-06-05T19:00:00.000Z	44 \| good	7.802 \| good	33.871 \| good	29.864 \| good	0.956 \| good	5.579 \| good	0.303 \| good
2025-06-05T20:00:00.000Z	44 \| good	8.008 \| good	35.335 \| good	31.722 \| good	0.638 \| good	5.411 \| good	0.303 \| good
2025-06-05T21:00:00.000Z	49 \| good	8.524 \| good	42.62 \| good	33.797 \| good	0.882 \| good	5.343 \| good	0.301 \| good
2025-06-05T22:00:00.000Z	44 \| good	7.56 \| good	32.336 \| good	34.786 \| good	0.683 \| good	5.285 \| good	0.302 \| good
2025-06-05T23:00:00.000Z	38 \| good	7.487 \| good	33.139 \| good	35.773 \| good	1.059 \| good	4.544 \| good	0.302 \| good
2025-06-06T00:00:00.000Z	44 \| good	7.612 \| good	33.619 \| good	35.196 \| good	0.817 \| good	3.962 \| good	0.302 \| good
2025-06-06T01:00:00.000Z	38 \| good	7.442 \| good	31.653 \| good	34.992 \| good	0.696 \| good	3.433 \| good	0.298 \| good
2025-06-06T02:00:00.000Z	44 \| good	7.702 \| good	35.712 \| good	33.619 \| good	0.744 \| good	2.947 \| good	0.271 \| good
2025-06-06T03:00:00.000Z	38 \| good	7.369 \| good	26.428 \| good	33.28 \| good	0.923 \| good	2.785 \| good	0.298 \| good
2025-06-06T04:00:00.000Z	33 \| good	6.243 \| good	28.229 \| good	31.877 \| good	0.723 \| good	3.534 \| good	0.302 \| good
2025-06-06T05:00:00.000Z	33 \| good	5.948 \| good	25.696 \| good	29.401 \| good	0.679 \| good	4.268 \| good	0.302 \| good
2025-06-06T06:00:00.000Z	27 \| good	4.881 \| good	20.937 \| good	28.104 \| good	0.691 \| good	4.638 \| good	0.302 \| good
2025-06-06T07:00:00.000Z	25 \| good	4.269 \| good	18.602 \| good	27.084 \| good	0.561 \| good	5.205 \| good	0.301 \| good
2025-06-06T08:00:00.000Z	38 \| good	6.712 \| good	30.429 \| good	26.284 \| good	0.508 \| good	4.428 \| good	0.271 \| good
2025-06-06T09:00:00.000Z	23 \| good	4.399 \| good	19.033 \| good	25.192 \| good	0.689 \| good	4.287 \| good	0.255 \| good
2025-06-06T10:00:00.000Z	27 \| good	4.876 \| good	24.093 \| good	24.989 \| good	0.678 \| good	3.695 \| good	0.214 \| good
2025-06-06T11:00:00.000Z	33 \| good	6.138 \| good	26.616 \| good	25.174 \| good	0.708 \| good	2.933 \| good	0.214 \| good
2025-06-06T12:00:00.000Z	33 \| good	5.69 \| good	24.26 \| good	25.285 \| good	0.659 \| good	3.153 \| good	0.214 \| good
2025-06-06T13:00:00.000Z	33 \| good	6.136 \| good	27.755 \| good	25.018 \| good	0.68 \| good	4.643 \| good	0.289 \| good
2025-06-06T14:00:00.000Z	38 \| good	6.648 \| good	28.8 \| good	25.447 \| good	0.713 \| good	5.02 \| good	0.275 \| good
2025-06-06T15:00:00.000Z	38 \| good	7.176 \| good	30.245 \| good	25.497 \| good	0.903 \| good	5.893 \| good	0.307 \| good
2025-06-06T16:00:00.000Z	44 \| good	7.668 \| good	35.033 \| good	26.758 \| good	0.509 \| good	3.992 \| good	0.271 \| good
2025-06-06T17:00:00.000Z	38 \| good	7.446 \| good	34.969 \| good	25.978 \| good	0.752 \| good	5.207 \| good	0.303 \| good
2025-06-06T18:00:00.000Z	44 \| good	7.955 \| good	34.499 \| good	28.176 \| good	0.782 \| good	6.412 \| good	0.365 \| good
2025-06-06T19:00:00.000Z	44 \| good	7.879 \| good	34.144 \| good	28.489 \| good	0.815 \| good	6.201 \| good	0.334 \| good
2025-06-06T20:00:00.000Z	44 \| good	7.744 \| good	37.059 \| good	30.371 \| good	1.034 \| good	6.038 \| good	0.364 \| good
2025-06-06T21:00:00.000Z	44 \| good	7.669 \| good	33.52 \| good	32.458 \| good	0.87 \| good	5.783 \| good	0.365 \| good
2025-06-06T22:00:00.000Z	44 \| good	7.759 \| good	33.903 \| good	32.064 \| good	0.872 \| good	5.713 \| good	0.363 \| good
2025-06-06T23:00:00.000Z	56 \| moderate	12.287 \| fine	55.24 \| fine	38.08 \| good	1.033 \| good	2.119 \| good	0.122 \| good
2025-06-07T00:00:00.000Z	58 \| moderate	12.828 \| fine	57.405 \| fine	33.656 \| good	1.197 \| good	2.263 \| good	0.128 \| good
2025-06-07T01:00:00.000Z	58 \| moderate	13.064 \| fine	58.538 \| fine	29.464 \| good	0.928 \| good	5.513 \| good	0.126 \| good
2025-06-07T02:00:00.000Z	56 \| moderate	12.142 \| fine	54.478 \| good	27.183 \| good	1.113 \| good	5.726 \| good	0.13 \| good
2025-06-07T03:00:00.000Z	56 \| moderate	12.467 \| fine	56.722 \| fine	24.754 \| good	1.299 \| good	5.94 \| good	0.135 \| good
2025-06-07T04:00:00.000Z	58 \| moderate	12.669 \| fine	57.065 \| fine	21.311 \| good	1.249 \| good	8.358 \| good	0.132 \| good
2025-06-07T05:00:00.000Z	56 \| moderate	12.245 \| fine	55.102 \| fine	21.602 \| good	1.422 \| good	9.314 \| good	0.139 \| good
2025-06-07T06:00:00.000Z	56 \| moderate	11.895 \| good	53.482 \| good	20.676 \| good	1.596 \| good	10.27 \| good	0.146 \| good
2025-06-07T07:00:00.000Z	56 \| moderate	12.077 \| good	54.405 \| good	21.236 \| good	1.32 \| good	9.578 \| good	0.137 \| good
2025-06-07T08:00:00.000Z	56 \| moderate	12.138 \| fine	54.681 \| good	20.492 \| good	1.5 \| good	11.301 \| good	0.148 \| good
2025-06-07T09:00:00.000Z	58 \| moderate	12.763 \| fine	57.281 \| fine	20.041 \| good	1.68 \| good	13.023 \| good	0.158 \| good
2025-06-07T10:00:00.000Z	56 \| moderate	12.425 \| fine	55.814 \| fine	18.961 \| good	1.252 \| good	8.847 \| good	0.13 \| good
2025-06-07T11:00:00.000Z	56 \| moderate	12.261 \| fine	54.999 \| good	17.183 \| good	1.419 \| good	11.164 \| good	0.143 \| good
2025-06-07T12:00:00.000Z	58 \| moderate	12.846 \| fine	56.956 \| fine	21.703 \| good	1.586 \| good	13.48 \| good	0.156 \| good
2025-06-07T13:00:00.000Z	56 \| moderate	12.405 \| fine	56.368 \| fine	20.851 \| good	1.561 \| good	5.221 \| good	0.122 \| good
2025-06-07T14:00:00.000Z	58 \| moderate	12.552 \| fine	57.025 \| fine	22.905 \| good	1.892 \| good	6.393 \| good	0.132 \| good
2025-06-07T15:00:00.000Z	56 \| moderate	12.179 \| fine	54.67 \| good	24.618 \| good	2.222 \| good	7.565 \| good	0.142 \| good
2025-06-07T16:00:00.000Z	54 \| moderate	10.946 \| good	48.535 \| good	24.539 \| good	1.34 \| good	3.387 \| good	0.121 \| good
2025-06-07T17:00:00.000Z	52 \| moderate	10.147 \| good	44.918 \| good	25.056 \| good	1.531 \| good	3.867 \| good	0.128 \| good
2025-06-07T18:00:00.000Z	52 \| moderate	9.629 \| good	42.847 \| good	26.772 \| good	1.722 \| good	4.348 \| good	0.135 \| good
2025-06-07T19:00:00.000Z	54 \| moderate	10.868 \| good	48.112 \| good	33.208 \| good	1.084 \| good	1.75 \| good	0.115 \| good
2025-06-07T20:00:00.000Z	54 \| moderate	11.12 \| good	49.059 \| good	37.07 \| good	1.219 \| good	1.951 \| good	0.121 \| good
2025-06-07T21:00:00.000Z	52 \| moderate	10.181 \| good	45.101 \| good	37.866 \| good	1.354 \| good	2.152 \| good	0.127 \| good
2025-06-07T22:00:00.000Z	52 \| moderate	9.796 \| good	43.693 \| good	36.041 \| good	0.819 \| good	2.092 \| good	0.116 \| good
2025-06-07T23:00:00.000Z	54 \| moderate	10.759 \| good	47.619 \| good	33.632 \| good	0.972 \| good	2.244 \| good	0.121 \| good
2025-06-08T00:00:00.000Z	56 \| moderate	11.793 \| good	52.082 \| good	31.472 \| good	1.126 \| good	2.397 \| good	0.127 \| good
2025-06-08T01:00:00.000Z	56 \| moderate	11.982 \| good	53.664 \| good	29.078 \| good	0.763 \| good	4.467 \| good	0.122 \| good
2025-06-08T02:00:00.000Z	54 \| moderate	11.019 \| good	48.735 \| good	26.988 \| good	0.963 \| good	5.241 \| good	0.13 \| good
2025-06-08T03:00:00.000Z	56 \| moderate	12.042 \| good	53.987 \| good	22.055 \| good	1.164 \| good	6.015 \| good	0.138 \| good
2025-06-08T04:00:00.000Z	58 \| moderate	12.66 \| fine	57.025 \| fine	20.843 \| good	0.779 \| good	4.667 \| good	0.119 \| good
2025-06-08T05:00:00.000Z	56 \| moderate	12.379 \| fine	55.303 \| fine	20.44 \| good	1.025 \| good	6.08 \| good	0.127 \| good
2025-06-08T06:00:00.000Z	56 \| moderate	11.653 \| good	51.064 \| good	21.184 \| good	1.271 \| good	7.493 \| good	0.136 \| good
2025-06-08T07:00:00.000Z	56 \| moderate	11.73 \| good	51.791 \| good	20.999 \| good	0.796 \| good	4.218 \| good	0.116 \| good
2025-06-08T08:00:00.000Z	54 \| moderate	11.479 \| good	50.944 \| good	21.232 \| good	1.053 \| good	5.745 \| good	0.124 \| good
2025-06-08T09:00:00.000Z	56 \| moderate	11.531 \| good	51.048 \| good	20.305 \| good	1.309 \| good	7.273 \| good	0.133 \| good
2025-06-08T10:00:00.000Z	54 \| moderate	10.91 \| good	48.302 \| good	20.667 \| good	0.784 \| good	3.761 \| good	0.112 \| good
2025-06-08T11:00:00.000Z	54 \| moderate	10.665 \| good	47.333 \| good	20.505 \| good	1.046 \| good	5.286 \| good	0.12 \| good
2025-06-08T12:00:00.000Z	56 \| moderate	12.069 \| good	53.894 \| good	26.783 \| good	1.308 \| good	6.81 \| good	0.128 \| good
2025-06-08T13:00:00.000Z	54 \| moderate	11.41 \| good	50.389 \| good	24.531 \| good	0.729 \| good	3.176 \| good	0.112 \| good
2025-06-08T14:00:00.000Z	56 \| moderate	12.072 \| good	54.441 \| good	25.768 \| good	0.979 \| good	4.181 \| good	0.119 \| good
2025-06-08T15:00:00.000Z	56 \| moderate	11.501 \| good	51.017 \| good	28.053 \| good	1.229 \| good	5.185 \| good	0.125 \| good
2025-06-08T16:00:00.000Z	54 \| moderate	10.539 \| good	46.632 \| good	29.771 \| good	0.652 \| good	2.359 \| good	0.116 \| good
2025-06-08T17:00:00.000Z	52 \| moderate	10.41 \| good	46.118 \| good	31.647 \| good	0.79 \| good	2.96 \| good	0.122 \| good
2025-06-08T18:00:00.000Z	52 \| moderate	9.888 \| good	43.933 \| good	33.029 \| good	0.928 \| good	3.561 \| good	0.128 \| good
2025-06-08T19:00:00.000Z	54 \| moderate	10.632 \| good	47.143 \| good	34.967 \| good	0.663 \| good	1.472 \| good	0.113 \| good
2025-06-08T20:00:00.000Z	54 \| moderate	10.754 \| good	47.562 \| good	36.469 \| good	0.798 \| good	1.754 \| good	0.118 \| good
2025-06-08T21:00:00.000Z	54 \| moderate	10.509 \| good	46.72 \| good	36.52 \| good	0.933 \| good	2.036 \| good	0.123 \| good
2025-06-08T22:00:00.000Z	52 \| moderate	10.405 \| good	45.937 \| good	34.968 \| good	0.53 \| good	1.736 \| good	0.114 \| good

Castro Valley

Get reliable air quality data to drive your business

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

0.31ppm

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 09:00:00 on 2025-06-06.

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 2025-06-06.

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 7.759 μg/m³.

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

The PM₁₀ concentration in Castro Valley, California is 33.903 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 0.363 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 0.872 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 32.064 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 5.713 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-06-04T23:00:00.000Z	62 \| moderate	15.168 \| fine	67.773 \| fine	37.949 \| good	0.849 \| good	4.541 \| good	0.333 \| good
2025-06-05T00:00:00.000Z	60 \| moderate	14.286 \| fine	53.946 \| good	37.696 \| good	0.833 \| good	4.978 \| good	0.303 \| good
2025-06-05T01:00:00.000Z	58 \| moderate	12.949 \| fine	51.345 \| good	38.102 \| good	0.789 \| good	3.665 \| good	0.33 \| good
2025-06-05T02:00:00.000Z	56 \| moderate	12.143 \| fine	50.298 \| good	37.042 \| good	0.895 \| good	3.634 \| good	0.33 \| good
2025-06-05T03:00:00.000Z	56 \| moderate	11.747 \| good	51.931 \| good	35.354 \| good	0.808 \| good	5.072 \| good	0.334 \| good
2025-06-05T04:00:00.000Z	52 \| moderate	10.478 \| good	42.791 \| good	33.941 \| good	0.727 \| good	6.974 \| good	0.334 \| good
2025-06-05T05:00:00.000Z	52 \| moderate	9.867 \| good	41.559 \| good	32.176 \| good	0.721 \| good	6.029 \| good	0.361 \| good
2025-06-05T06:00:00.000Z	52 \| moderate	9.878 \| good	42.98 \| good	29.667 \| good	0.687 \| good	5.203 \| good	0.301 \| good
2025-06-05T07:00:00.000Z	52 \| moderate	9.943 \| good	51.455 \| good	26.879 \| good	0.696 \| good	4.933 \| good	0.301 \| good
2025-06-05T08:00:00.000Z	52 \| moderate	9.526 \| good	41.322 \| good	26.868 \| good	0.72 \| good	5.144 \| good	0.27 \| good
2025-06-05T09:00:00.000Z	44 \| good	8.109 \| good	38.911 \| good	26.644 \| good	0.775 \| good	4.044 \| good	0.276 \| good
2025-06-05T10:00:00.000Z	52 \| moderate	9.664 \| good	50.91 \| good	26.307 \| good	0.914 \| good	3.899 \| good	0.214 \| good
2025-06-05T11:00:00.000Z	49 \| good	9.076 \| good	37.664 \| good	27.009 \| good	0.901 \| good	4.32 \| good	0.214 \| good
2025-06-05T12:00:00.000Z	49 \| good	9.26 \| good	34.918 \| good	26.767 \| good	1.06 \| good	4.762 \| good	0.214 \| good
2025-06-05T13:00:00.000Z	52 \| moderate	10.221 \| good	47.584 \| good	25.347 \| good	1.579 \| good	3.297 \| good	0.256 \| good
2025-06-05T14:00:00.000Z	44 \| good	8.302 \| good	36.871 \| good	26.844 \| good	1.104 \| good	4.798 \| good	0.275 \| good
2025-06-05T15:00:00.000Z	38 \| good	7.414 \| good	34.009 \| good	27.401 \| good	1.113 \| good	4.233 \| good	0.243 \| good
2025-06-05T16:00:00.000Z	44 \| good	8.114 \| good	33.046 \| good	27.25 \| good	1.103 \| good	5.809 \| good	0.261 \| good
2025-06-05T17:00:00.000Z	44 \| good	7.633 \| good	33.552 \| good	28.272 \| good	1.14 \| good	5.765 \| good	0.302 \| good
2025-06-05T18:00:00.000Z	44 \| good	8.492 \| good	38.938 \| good	30.504 \| good	1.08 \| good	5.345 \| good	0.303 \| good
2025-06-05T19:00:00.000Z	44 \| good	7.802 \| good	33.871 \| good	29.864 \| good	0.956 \| good	5.579 \| good	0.303 \| good
2025-06-05T20:00:00.000Z	44 \| good	8.008 \| good	35.335 \| good	31.722 \| good	0.638 \| good	5.411 \| good	0.303 \| good
2025-06-05T21:00:00.000Z	49 \| good	8.524 \| good	42.62 \| good	33.797 \| good	0.882 \| good	5.343 \| good	0.301 \| good
2025-06-05T22:00:00.000Z	44 \| good	7.56 \| good	32.336 \| good	34.786 \| good	0.683 \| good	5.285 \| good	0.302 \| good
2025-06-05T23:00:00.000Z	38 \| good	7.487 \| good	33.139 \| good	35.773 \| good	1.059 \| good	4.544 \| good	0.302 \| good
2025-06-06T00:00:00.000Z	44 \| good	7.612 \| good	33.619 \| good	35.196 \| good	0.817 \| good	3.962 \| good	0.302 \| good
2025-06-06T01:00:00.000Z	38 \| good	7.442 \| good	31.653 \| good	34.992 \| good	0.696 \| good	3.433 \| good	0.298 \| good
2025-06-06T02:00:00.000Z	44 \| good	7.702 \| good	35.712 \| good	33.619 \| good	0.744 \| good	2.947 \| good	0.271 \| good
2025-06-06T03:00:00.000Z	38 \| good	7.369 \| good	26.428 \| good	33.28 \| good	0.923 \| good	2.785 \| good	0.298 \| good
2025-06-06T04:00:00.000Z	33 \| good	6.243 \| good	28.229 \| good	31.877 \| good	0.723 \| good	3.534 \| good	0.302 \| good
2025-06-06T05:00:00.000Z	33 \| good	5.948 \| good	25.696 \| good	29.401 \| good	0.679 \| good	4.268 \| good	0.302 \| good
2025-06-06T06:00:00.000Z	27 \| good	4.881 \| good	20.937 \| good	28.104 \| good	0.691 \| good	4.638 \| good	0.302 \| good
2025-06-06T07:00:00.000Z	25 \| good	4.269 \| good	18.602 \| good	27.084 \| good	0.561 \| good	5.205 \| good	0.301 \| good
2025-06-06T08:00:00.000Z	38 \| good	6.712 \| good	30.429 \| good	26.284 \| good	0.508 \| good	4.428 \| good	0.271 \| good
2025-06-06T09:00:00.000Z	23 \| good	4.399 \| good	19.033 \| good	25.192 \| good	0.689 \| good	4.287 \| good	0.255 \| good
2025-06-06T10:00:00.000Z	27 \| good	4.876 \| good	24.093 \| good	24.989 \| good	0.678 \| good	3.695 \| good	0.214 \| good
2025-06-06T11:00:00.000Z	33 \| good	6.138 \| good	26.616 \| good	25.174 \| good	0.708 \| good	2.933 \| good	0.214 \| good
2025-06-06T12:00:00.000Z	33 \| good	5.69 \| good	24.26 \| good	25.285 \| good	0.659 \| good	3.153 \| good	0.214 \| good
2025-06-06T13:00:00.000Z	33 \| good	6.136 \| good	27.755 \| good	25.018 \| good	0.68 \| good	4.643 \| good	0.289 \| good
2025-06-06T14:00:00.000Z	38 \| good	6.648 \| good	28.8 \| good	25.447 \| good	0.713 \| good	5.02 \| good	0.275 \| good
2025-06-06T15:00:00.000Z	38 \| good	7.176 \| good	30.245 \| good	25.497 \| good	0.903 \| good	5.893 \| good	0.307 \| good
2025-06-06T16:00:00.000Z	44 \| good	7.668 \| good	35.033 \| good	26.758 \| good	0.509 \| good	3.992 \| good	0.271 \| good
2025-06-06T17:00:00.000Z	38 \| good	7.446 \| good	34.969 \| good	25.978 \| good	0.752 \| good	5.207 \| good	0.303 \| good
2025-06-06T18:00:00.000Z	44 \| good	7.955 \| good	34.499 \| good	28.176 \| good	0.782 \| good	6.412 \| good	0.365 \| good
2025-06-06T19:00:00.000Z	44 \| good	7.879 \| good	34.144 \| good	28.489 \| good	0.815 \| good	6.201 \| good	0.334 \| good
2025-06-06T20:00:00.000Z	44 \| good	7.744 \| good	37.059 \| good	30.371 \| good	1.034 \| good	6.038 \| good	0.364 \| good
2025-06-06T21:00:00.000Z	44 \| good	7.669 \| good	33.52 \| good	32.458 \| good	0.87 \| good	5.783 \| good	0.365 \| good
2025-06-06T22:00:00.000Z	44 \| good	7.759 \| good	33.903 \| good	32.064 \| good	0.872 \| good	5.713 \| good	0.363 \| good
2025-06-06T23:00:00.000Z	56 \| moderate	12.287 \| fine	55.24 \| fine	38.08 \| good	1.033 \| good	2.119 \| good	0.122 \| good
2025-06-07T00:00:00.000Z	58 \| moderate	12.828 \| fine	57.405 \| fine	33.656 \| good	1.197 \| good	2.263 \| good	0.128 \| good
2025-06-07T01:00:00.000Z	58 \| moderate	13.064 \| fine	58.538 \| fine	29.464 \| good	0.928 \| good	5.513 \| good	0.126 \| good
2025-06-07T02:00:00.000Z	56 \| moderate	12.142 \| fine	54.478 \| good	27.183 \| good	1.113 \| good	5.726 \| good	0.13 \| good
2025-06-07T03:00:00.000Z	56 \| moderate	12.467 \| fine	56.722 \| fine	24.754 \| good	1.299 \| good	5.94 \| good	0.135 \| good
2025-06-07T04:00:00.000Z	58 \| moderate	12.669 \| fine	57.065 \| fine	21.311 \| good	1.249 \| good	8.358 \| good	0.132 \| good
2025-06-07T05:00:00.000Z	56 \| moderate	12.245 \| fine	55.102 \| fine	21.602 \| good	1.422 \| good	9.314 \| good	0.139 \| good
2025-06-07T06:00:00.000Z	56 \| moderate	11.895 \| good	53.482 \| good	20.676 \| good	1.596 \| good	10.27 \| good	0.146 \| good
2025-06-07T07:00:00.000Z	56 \| moderate	12.077 \| good	54.405 \| good	21.236 \| good	1.32 \| good	9.578 \| good	0.137 \| good
2025-06-07T08:00:00.000Z	56 \| moderate	12.138 \| fine	54.681 \| good	20.492 \| good	1.5 \| good	11.301 \| good	0.148 \| good
2025-06-07T09:00:00.000Z	58 \| moderate	12.763 \| fine	57.281 \| fine	20.041 \| good	1.68 \| good	13.023 \| good	0.158 \| good
2025-06-07T10:00:00.000Z	56 \| moderate	12.425 \| fine	55.814 \| fine	18.961 \| good	1.252 \| good	8.847 \| good	0.13 \| good
2025-06-07T11:00:00.000Z	56 \| moderate	12.261 \| fine	54.999 \| good	17.183 \| good	1.419 \| good	11.164 \| good	0.143 \| good
2025-06-07T12:00:00.000Z	58 \| moderate	12.846 \| fine	56.956 \| fine	21.703 \| good	1.586 \| good	13.48 \| good	0.156 \| good
2025-06-07T13:00:00.000Z	56 \| moderate	12.405 \| fine	56.368 \| fine	20.851 \| good	1.561 \| good	5.221 \| good	0.122 \| good
2025-06-07T14:00:00.000Z	58 \| moderate	12.552 \| fine	57.025 \| fine	22.905 \| good	1.892 \| good	6.393 \| good	0.132 \| good
2025-06-07T15:00:00.000Z	56 \| moderate	12.179 \| fine	54.67 \| good	24.618 \| good	2.222 \| good	7.565 \| good	0.142 \| good
2025-06-07T16:00:00.000Z	54 \| moderate	10.946 \| good	48.535 \| good	24.539 \| good	1.34 \| good	3.387 \| good	0.121 \| good
2025-06-07T17:00:00.000Z	52 \| moderate	10.147 \| good	44.918 \| good	25.056 \| good	1.531 \| good	3.867 \| good	0.128 \| good
2025-06-07T18:00:00.000Z	52 \| moderate	9.629 \| good	42.847 \| good	26.772 \| good	1.722 \| good	4.348 \| good	0.135 \| good
2025-06-07T19:00:00.000Z	54 \| moderate	10.868 \| good	48.112 \| good	33.208 \| good	1.084 \| good	1.75 \| good	0.115 \| good
2025-06-07T20:00:00.000Z	54 \| moderate	11.12 \| good	49.059 \| good	37.07 \| good	1.219 \| good	1.951 \| good	0.121 \| good
2025-06-07T21:00:00.000Z	52 \| moderate	10.181 \| good	45.101 \| good	37.866 \| good	1.354 \| good	2.152 \| good	0.127 \| good
2025-06-07T22:00:00.000Z	52 \| moderate	9.796 \| good	43.693 \| good	36.041 \| good	0.819 \| good	2.092 \| good	0.116 \| good
2025-06-07T23:00:00.000Z	54 \| moderate	10.759 \| good	47.619 \| good	33.632 \| good	0.972 \| good	2.244 \| good	0.121 \| good
2025-06-08T00:00:00.000Z	56 \| moderate	11.793 \| good	52.082 \| good	31.472 \| good	1.126 \| good	2.397 \| good	0.127 \| good
2025-06-08T01:00:00.000Z	56 \| moderate	11.982 \| good	53.664 \| good	29.078 \| good	0.763 \| good	4.467 \| good	0.122 \| good
2025-06-08T02:00:00.000Z	54 \| moderate	11.019 \| good	48.735 \| good	26.988 \| good	0.963 \| good	5.241 \| good	0.13 \| good
2025-06-08T03:00:00.000Z	56 \| moderate	12.042 \| good	53.987 \| good	22.055 \| good	1.164 \| good	6.015 \| good	0.138 \| good
2025-06-08T04:00:00.000Z	58 \| moderate	12.66 \| fine	57.025 \| fine	20.843 \| good	0.779 \| good	4.667 \| good	0.119 \| good
2025-06-08T05:00:00.000Z	56 \| moderate	12.379 \| fine	55.303 \| fine	20.44 \| good	1.025 \| good	6.08 \| good	0.127 \| good
2025-06-08T06:00:00.000Z	56 \| moderate	11.653 \| good	51.064 \| good	21.184 \| good	1.271 \| good	7.493 \| good	0.136 \| good
2025-06-08T07:00:00.000Z	56 \| moderate	11.73 \| good	51.791 \| good	20.999 \| good	0.796 \| good	4.218 \| good	0.116 \| good
2025-06-08T08:00:00.000Z	54 \| moderate	11.479 \| good	50.944 \| good	21.232 \| good	1.053 \| good	5.745 \| good	0.124 \| good
2025-06-08T09:00:00.000Z	56 \| moderate	11.531 \| good	51.048 \| good	20.305 \| good	1.309 \| good	7.273 \| good	0.133 \| good
2025-06-08T10:00:00.000Z	54 \| moderate	10.91 \| good	48.302 \| good	20.667 \| good	0.784 \| good	3.761 \| good	0.112 \| good
2025-06-08T11:00:00.000Z	54 \| moderate	10.665 \| good	47.333 \| good	20.505 \| good	1.046 \| good	5.286 \| good	0.12 \| good
2025-06-08T12:00:00.000Z	56 \| moderate	12.069 \| good	53.894 \| good	26.783 \| good	1.308 \| good	6.81 \| good	0.128 \| good
2025-06-08T13:00:00.000Z	54 \| moderate	11.41 \| good	50.389 \| good	24.531 \| good	0.729 \| good	3.176 \| good	0.112 \| good
2025-06-08T14:00:00.000Z	56 \| moderate	12.072 \| good	54.441 \| good	25.768 \| good	0.979 \| good	4.181 \| good	0.119 \| good
2025-06-08T15:00:00.000Z	56 \| moderate	11.501 \| good	51.017 \| good	28.053 \| good	1.229 \| good	5.185 \| good	0.125 \| good
2025-06-08T16:00:00.000Z	54 \| moderate	10.539 \| good	46.632 \| good	29.771 \| good	0.652 \| good	2.359 \| good	0.116 \| good
2025-06-08T17:00:00.000Z	52 \| moderate	10.41 \| good	46.118 \| good	31.647 \| good	0.79 \| good	2.96 \| good	0.122 \| good
2025-06-08T18:00:00.000Z	52 \| moderate	9.888 \| good	43.933 \| good	33.029 \| good	0.928 \| good	3.561 \| good	0.128 \| good
2025-06-08T19:00:00.000Z	54 \| moderate	10.632 \| good	47.143 \| good	34.967 \| good	0.663 \| good	1.472 \| good	0.113 \| good
2025-06-08T20:00:00.000Z	54 \| moderate	10.754 \| good	47.562 \| good	36.469 \| good	0.798 \| good	1.754 \| good	0.118 \| good
2025-06-08T21:00:00.000Z	54 \| moderate	10.509 \| good	46.72 \| good	36.52 \| good	0.933 \| good	2.036 \| good	0.123 \| good
2025-06-08T22:00:00.000Z	52 \| moderate	10.405 \| good	45.937 \| good	34.968 \| good	0.53 \| good	1.736 \| good	0.114 \| good

Real-time 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)

Track live Castro Valley, California air quality forecast and history

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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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Hayward, California

Cherryland, California

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Frequently asked questions

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

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

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

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

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

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

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

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

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

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

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

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

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

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