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 0.863 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 16.057 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 8.294 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 10.991 μg/m3.

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

The PM10 concentration in Castro Valley, California is 39.756 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)

Moderate

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)

12.35 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

47.62 μg/m³

155

255

425

605+

Ozone (O₃)

17.18 ppb

201

201+

Sulfur Dioxide (SO₂)

0.65 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

8.81 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.37 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

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
2026-01-22T00:00:00.000Z	60 \| moderate	14.386 \| fine	56.481 \| fine	13.043 \| good	0.899 \| good	16.652 \| good	0.544 \| good
2026-01-22T01:00:00.000Z	54 \| moderate	11.317 \| good	51.514 \| good	11.36 \| good	0.859 \| good	16.739 \| good	0.498 \| good
2026-01-22T02:00:00.000Z	58 \| moderate	13.012 \| fine	59.052 \| fine	9.997 \| good	0.81 \| good	15.261 \| good	0.511 \| good
2026-01-22T03:00:00.000Z	62 \| moderate	14.514 \| fine	56.533 \| fine	7.945 \| good	0.825 \| good	20.808 \| good	0.585 \| good
2026-01-22T04:00:00.000Z	60 \| moderate	14.08 \| fine	62.782 \| fine	8.269 \| good	0.782 \| good	20.425 \| good	0.542 \| good
2026-01-22T05:00:00.000Z	60 \| moderate	13.646 \| fine	56.569 \| fine	10.214 \| good	0.795 \| good	20.108 \| good	0.512 \| good
2026-01-22T06:00:00.000Z	58 \| moderate	13.093 \| fine	46.869 \| good	8.927 \| good	0.853 \| good	20.288 \| good	0.588 \| good
2026-01-22T07:00:00.000Z	60 \| moderate	13.708 \| fine	57.935 \| fine	9.905 \| good	0.833 \| good	21.385 \| good	0.63 \| good
2026-01-22T08:00:00.000Z	64 \| moderate	15.692 \| fine	50.237 \| good	11.206 \| good	0.902 \| good	19.629 \| good	0.613 \| good
2026-01-22T09:00:00.000Z	58 \| moderate	12.543 \| fine	58.371 \| fine	10.611 \| good	0.822 \| good	19.351 \| good	0.601 \| good
2026-01-22T10:00:00.000Z	62 \| moderate	14.953 \| fine	47.316 \| good	9.175 \| good	0.828 \| good	19.052 \| good	0.54 \| good
2026-01-22T11:00:00.000Z	58 \| moderate	12.859 \| fine	55.427 \| fine	10.143 \| good	0.802 \| good	18.32 \| good	0.524 \| good
2026-01-22T12:00:00.000Z	58 \| moderate	13.224 \| fine	53.951 \| good	10.676 \| good	0.746 \| good	15.764 \| good	0.523 \| good
2026-01-22T13:00:00.000Z	56 \| moderate	11.76 \| good	56.783 \| fine	10.133 \| good	0.79 \| good	16.345 \| good	0.563 \| good
2026-01-22T14:00:00.000Z	62 \| moderate	14.665 \| fine	55.273 \| fine	11.602 \| good	0.736 \| good	15.706 \| good	0.586 \| good
2026-01-22T15:00:00.000Z	52 \| moderate	10.367 \| good	49.705 \| good	11.902 \| good	0.761 \| good	15.048 \| good	0.63 \| good
2026-01-22T16:00:00.000Z	54 \| moderate	11.129 \| good	51.228 \| good	12.63 \| good	0.761 \| good	17.398 \| good	0.707 \| good
2026-01-22T17:00:00.000Z	52 \| moderate	9.537 \| good	46.442 \| good	12.701 \| good	0.82 \| good	17.87 \| good	0.744 \| good
2026-01-22T18:00:00.000Z	58 \| moderate	12.958 \| fine	39.732 \| good	15.239 \| good	0.953 \| good	14.612 \| good	0.635 \| good
2026-01-22T19:00:00.000Z	64 \| moderate	15.961 \| fine	67.551 \| fine	16.733 \| good	0.923 \| good	15.366 \| good	0.578 \| good
2026-01-22T20:00:00.000Z	69 \| moderate	18.543 \| fine	65.471 \| fine	12.456 \| good	1.067 \| good	13.589 \| good	0.523 \| good
2026-01-22T21:00:00.000Z	64 \| moderate	16.478 \| fine	54.297 \| good	13.764 \| good	0.976 \| good	15.122 \| good	0.487 \| good
2026-01-22T22:00:00.000Z	66 \| moderate	16.672 \| fine	43.224 \| good	14.07 \| good	0.796 \| good	12.731 \| good	0.377 \| good
2026-01-22T23:00:00.000Z	56 \| moderate	12.197 \| fine	53.526 \| good	19.21 \| good	0.981 \| good	17.873 \| good	0.425 \| good
2026-01-23T00:00:00.000Z	67 \| moderate	17.955 \| fine	62.471 \| fine	19.607 \| good	0.916 \| good	12.924 \| good	0.408 \| good
2026-01-23T01:00:00.000Z	56 \| moderate	11.8 \| good	45.151 \| good	22.138 \| good	0.824 \| good	12.069 \| good	0.349 \| good
2026-01-23T02:00:00.000Z	58 \| moderate	13.04 \| fine	54.347 \| good	23.535 \| good	1.505 \| good	12.164 \| good	0.394 \| good
2026-01-23T03:00:00.000Z	54 \| moderate	11.233 \| good	44.972 \| good	21.457 \| good	0.887 \| good	17.473 \| good	0.485 \| good
2026-01-23T04:00:00.000Z	58 \| moderate	12.912 \| fine	50.172 \| good	20.869 \| good	0.7 \| good	19.35 \| good	0.408 \| good
2026-01-23T05:00:00.000Z	56 \| moderate	11.957 \| good	40.681 \| good	18.095 \| good	0.597 \| good	22.791 \| good	0.542 \| good
2026-01-23T06:00:00.000Z	60 \| moderate	14.369 \| fine	53.381 \| good	16.6 \| good	0.486 \| good	16.557 \| good	0.478 \| good
2026-01-23T07:00:00.000Z	54 \| moderate	11.315 \| good	60.172 \| fine	11.705 \| good	0.432 \| good	19.375 \| good	0.533 \| good
2026-01-23T08:00:00.000Z	60 \| moderate	14.256 \| fine	48.357 \| good	11.763 \| good	0.456 \| good	19.819 \| good	0.478 \| good
2026-01-23T09:00:00.000Z	67 \| moderate	18.19 \| fine	49.496 \| good	10.866 \| good	0.492 \| good	18.192 \| good	0.432 \| good
2026-01-23T10:00:00.000Z	64 \| moderate	15.744 \| fine	55.283 \| fine	12.041 \| good	0.551 \| good	16.352 \| good	0.457 \| good
2026-01-23T11:00:00.000Z	63 \| moderate	15.419 \| fine	78.502 \| fine	10.016 \| good	0.524 \| good	16.02 \| good	0.459 \| good
2026-01-23T12:00:00.000Z	58 \| moderate	12.725 \| fine	50.487 \| good	10.512 \| good	0.381 \| good	13.519 \| good	0.448 \| good
2026-01-23T13:00:00.000Z	56 \| moderate	11.743 \| good	51.259 \| good	11.042 \| good	0.904 \| good	12.649 \| good	0.316 \| good
2026-01-23T14:00:00.000Z	52 \| moderate	10.457 \| good	40.331 \| good	11.614 \| good	0.849 \| good	12.925 \| good	0.316 \| good
2026-01-23T15:00:00.000Z	56 \| moderate	11.95 \| good	42.01 \| good	13.474 \| good	0.847 \| good	12.313 \| good	0.374 \| good
2026-01-23T16:00:00.000Z	56 \| moderate	12.087 \| good	44.702 \| good	15.646 \| good	0.669 \| good	11.733 \| good	0.374 \| good
2026-01-23T17:00:00.000Z	58 \| moderate	11.014 \| good	69.114 \| fine	16.64 \| good	0.604 \| good	10.876 \| good	0.376 \| good
2026-01-23T18:00:00.000Z	54 \| moderate	11.069 \| good	47.96 \| good	16.815 \| good	0.648 \| good	9.517 \| good	0.314 \| good
2026-01-23T19:00:00.000Z	54 \| moderate	10.875 \| good	50.456 \| good	15.969 \| good	0.774 \| good	8.273 \| good	0.358 \| good
2026-01-23T20:00:00.000Z	54 \| moderate	10.548 \| good	35.176 \| good	15.518 \| good	0.884 \| good	8.004 \| good	0.317 \| good
2026-01-23T21:00:00.000Z	54 \| moderate	10.801 \| good	51.039 \| good	15.996 \| good	0.741 \| good	9.461 \| good	0.389 \| good
2026-01-23T22:00:00.000Z	56 \| moderate	12.389 \| fine	45.795 \| good	16.759 \| good	0.653 \| good	8.676 \| good	0.389 \| good
2026-01-23T23:00:00.000Z	56 \| moderate	12.349 \| fine	47.62 \| good	17.182 \| good	0.645 \| good	8.812 \| good	0.373 \| good
2026-01-23T22:00:00.000Z	71 \| moderate	19.921 \| fine	87.261 \| fine	32.046 \| good	3.368 \| good	12.324 \| good	0.243 \| good
2026-01-23T23:00:00.000Z	71 \| moderate	20.315 \| fine	89.819 \| fine	32.166 \| good	3.451 \| good	13.201 \| good	0.244 \| good
2026-01-24T00:00:00.000Z	88 \| moderate	29.065 \| fine	125.731 \| fine	23.954 \| good	3.535 \| good	14.077 \| good	0.246 \| good
2026-01-24T01:00:00.000Z	84 \| moderate	26.909 \| fine	116.572 \| fine	11.218 \| good	3.564 \| good	20.309 \| good	0.308 \| good
2026-01-24T02:00:00.000Z	90 \| moderate	29.797 \| fine	128.793 \| fine	10.059 \| good	3.594 \| good	26.541 \| good	0.369 \| good
2026-01-24T03:00:00.000Z	86 \| moderate	28.121 \| fine	122.618 \| fine	10.056 \| good	3.623 \| good	32.773 \| good	0.431 \| good
2026-01-24T04:00:00.000Z	84 \| moderate	26.966 \| fine	117.089 \| fine	11.054 \| good	3.953 \| good	32.846 \| good	0.465 \| good
2026-01-24T05:00:00.000Z	82 \| moderate	25.516 \| fine	110.938 \| fine	10.979 \| good	4.283 \| good	32.919 \| good	0.498 \| good
2026-01-24T06:00:00.000Z	82 \| moderate	25.781 \| fine	112.729 \| fine	11.374 \| good	4.612 \| good	32.991 \| good	0.532 \| good
2026-01-24T07:00:00.000Z	82 \| moderate	25.556 \| fine	111.592 \| fine	10.002 \| good	4.382 \| good	31.825 \| good	0.521 \| good
2026-01-24T08:00:00.000Z	79 \| moderate	23.829 \| fine	104.294 \| fine	12.028 \| good	4.153 \| good	30.659 \| good	0.511 \| good
2026-01-24T09:00:00.000Z	77 \| moderate	23.485 \| fine	102.358 \| fine	11.928 \| good	3.923 \| good	29.492 \| good	0.501 \| good
2026-01-24T10:00:00.000Z	73 \| moderate	21.039 \| fine	92.651 \| fine	14.196 \| good	3.597 \| good	27.529 \| good	0.483 \| good
2026-01-24T11:00:00.000Z	67 \| moderate	18.297 \| fine	80.623 \| fine	16.792 \| good	3.272 \| good	25.566 \| good	0.464 \| good
2026-01-24T12:00:00.000Z	64 \| moderate	15.64 \| fine	69.502 \| fine	14.69 \| good	2.946 \| good	23.603 \| good	0.446 \| good
2026-01-24T13:00:00.000Z	56 \| moderate	11.65 \| good	51.97 \| good	14.1 \| good	3.006 \| good	23.537 \| good	0.414 \| good
2026-01-24T14:00:00.000Z	22 \| good	4.485 \| good	19.344 \| good	16.64 \| good	3.067 \| good	23.47 \| good	0.383 \| good
2026-01-24T15:00:00.000Z	27 \| good	4.981 \| good	21.321 \| good	18.794 \| good	3.127 \| good	23.404 \| good	0.351 \| good
2026-01-24T16:00:00.000Z	22 \| good	4.161 \| good	18.287 \| good	22.596 \| good	2.591 \| good	19.607 \| good	0.31 \| good
2026-01-24T17:00:00.000Z	27 \| good	5.052 \| good	21.817 \| good	28.337 \| good	2.055 \| good	15.81 \| good	0.269 \| good
2026-01-24T18:00:00.000Z	27 \| good	5.181 \| good	22.783 \| good	28.76 \| good	1.519 \| good	12.014 \| good	0.228 \| good
2026-01-24T19:00:00.000Z	33 \| good	5.746 \| good	25.167 \| good	29.49 \| good	1.297 \| good	9.272 \| good	0.199 \| good
2026-01-24T20:00:00.000Z	30 \| good	4.181 \| good	18.467 \| good	31.771 \| good	1.076 \| good	6.531 \| good	0.171 \| good
2026-01-24T21:00:00.000Z	30 \| good	2.331 \| good	9.465 \| good	32.353 \| good	0.854 \| good	3.79 \| good	0.143 \| good
2026-01-24T22:00:00.000Z	30 \| good	1.374 \| good	5.583 \| good	32.294 \| good	0.839 \| good	4.056 \| good	0.142 \| good
2026-01-24T23:00:00.000Z	30 \| good	1.639 \| good	6.794 \| good	32.246 \| good	0.825 \| good	4.322 \| good	0.142 \| good
2026-01-25T00:00:00.000Z	29 \| good	2.362 \| good	9.705 \| good	31.464 \| good	0.81 \| good	4.588 \| good	0.141 \| good
2026-01-25T01:00:00.000Z	25 \| good	2.061 \| good	8.62 \| good	26.628 \| good	0.985 \| good	12.337 \| good	0.188 \| good
2026-01-25T02:00:00.000Z	21 \| good	3.136 \| good	13.47 \| good	23.106 \| good	1.161 \| good	20.087 \| good	0.235 \| good
2026-01-25T03:00:00.000Z	26 \| good	3.55 \| good	15.35 \| good	23.727 \| good	1.336 \| good	27.837 \| good	0.281 \| good
2026-01-25T04:00:00.000Z	26 \| good	4.01 \| good	17.433 \| good	23.287 \| good	1.415 \| good	28.181 \| good	0.288 \| good
2026-01-25T05:00:00.000Z	27 \| good	5.284 \| good	23.01 \| good	22.597 \| good	1.493 \| good	28.526 \| good	0.295 \| good
2026-01-25T06:00:00.000Z	27 \| good	4.841 \| good	21.115 \| good	22.483 \| good	1.572 \| good	28.87 \| good	0.302 \| good
2026-01-25T07:00:00.000Z	26 \| good	3.99 \| good	17.452 \| good	22.922 \| good	1.416 \| good	27.702 \| good	0.299 \| good
2026-01-25T08:00:00.000Z	27 \| good	4.71 \| good	20.415 \| good	23.27 \| good	1.261 \| good	26.534 \| good	0.296 \| good
2026-01-25T09:00:00.000Z	27 \| good	5.239 \| good	22.466 \| good	22.981 \| good	1.105 \| good	25.367 \| good	0.293 \| good
2026-01-25T10:00:00.000Z	27 \| good	4.929 \| good	21.164 \| good	22.577 \| good	1.014 \| good	24.023 \| good	0.28 \| good
2026-01-25T11:00:00.000Z	38 \| good	7.376 \| good	32.382 \| good	21.721 \| good	0.923 \| good	22.679 \| good	0.267 \| good
2026-01-25T12:00:00.000Z	38 \| good	6.604 \| good	29.003 \| good	20.986 \| good	0.832 \| good	21.335 \| good	0.254 \| good
2026-01-25T13:00:00.000Z	33 \| good	5.58 \| good	24.322 \| good	20.661 \| good	0.92 \| good	21.405 \| good	0.254 \| good
2026-01-25T14:00:00.000Z	20 \| good	2.712 \| good	11.227 \| good	20.76 \| good	1.008 \| good	21.475 \| good	0.253 \| good
2026-01-25T15:00:00.000Z	22 \| good	3.765 \| good	16.385 \| good	20.523 \| good	1.096 \| good	21.545 \| good	0.253 \| good
2026-01-25T16:00:00.000Z	22 \| good	4.193 \| good	18.33 \| good	20.621 \| good	1.21 \| good	19.737 \| good	0.26 \| good
2026-01-25T17:00:00.000Z	38 \| good	7.126 \| good	31.603 \| good	19.958 \| good	1.325 \| good	17.928 \| good	0.268 \| good
2026-01-25T18:00:00.000Z	38 \| good	7.187 \| good	31.774 \| good	22.122 \| good	1.439 \| good	16.12 \| good	0.275 \| good
2026-01-25T19:00:00.000Z	44 \| good	7.673 \| good	33.789 \| good	24.104 \| good	1.506 \| good	13.625 \| good	0.252 \| good
2026-01-25T20:00:00.000Z	44 \| good	7.566 \| good	33.382 \| good	23.1 \| good	1.574 \| good	11.13 \| good	0.229 \| good
2026-01-25T21:00:00.000Z	44 \| good	7.622 \| good	33.516 \| good	23.973 \| good	1.642 \| good	8.636 \| good	0.205 \| 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 09:00:00 on 2026-01-23.

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 08:00:00 on 2026-01-23.

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

As of now, the AQI in Castro Valley, California is 54, indicating Moderate 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 10.991 μg/m³.

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

The PM₁₀ concentration in Castro Valley, California is 39.756 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 0.309 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 0.863 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 16.057 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 8.294 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-01-22T00:00:00.000Z	60 \| moderate	14.386 \| fine	56.481 \| fine	13.043 \| good	0.899 \| good	16.652 \| good	0.544 \| good
2026-01-22T01:00:00.000Z	54 \| moderate	11.317 \| good	51.514 \| good	11.36 \| good	0.859 \| good	16.739 \| good	0.498 \| good
2026-01-22T02:00:00.000Z	58 \| moderate	13.012 \| fine	59.052 \| fine	9.997 \| good	0.81 \| good	15.261 \| good	0.511 \| good
2026-01-22T03:00:00.000Z	62 \| moderate	14.514 \| fine	56.533 \| fine	7.945 \| good	0.825 \| good	20.808 \| good	0.585 \| good
2026-01-22T04:00:00.000Z	60 \| moderate	14.08 \| fine	62.782 \| fine	8.269 \| good	0.782 \| good	20.425 \| good	0.542 \| good
2026-01-22T05:00:00.000Z	60 \| moderate	13.646 \| fine	56.569 \| fine	10.214 \| good	0.795 \| good	20.108 \| good	0.512 \| good
2026-01-22T06:00:00.000Z	58 \| moderate	13.093 \| fine	46.869 \| good	8.927 \| good	0.853 \| good	20.288 \| good	0.588 \| good
2026-01-22T07:00:00.000Z	60 \| moderate	13.708 \| fine	57.935 \| fine	9.905 \| good	0.833 \| good	21.385 \| good	0.63 \| good
2026-01-22T08:00:00.000Z	64 \| moderate	15.692 \| fine	50.237 \| good	11.206 \| good	0.902 \| good	19.629 \| good	0.613 \| good
2026-01-22T09:00:00.000Z	58 \| moderate	12.543 \| fine	58.371 \| fine	10.611 \| good	0.822 \| good	19.351 \| good	0.601 \| good
2026-01-22T10:00:00.000Z	62 \| moderate	14.953 \| fine	47.316 \| good	9.175 \| good	0.828 \| good	19.052 \| good	0.54 \| good
2026-01-22T11:00:00.000Z	58 \| moderate	12.859 \| fine	55.427 \| fine	10.143 \| good	0.802 \| good	18.32 \| good	0.524 \| good
2026-01-22T12:00:00.000Z	58 \| moderate	13.224 \| fine	53.951 \| good	10.676 \| good	0.746 \| good	15.764 \| good	0.523 \| good
2026-01-22T13:00:00.000Z	56 \| moderate	11.76 \| good	56.783 \| fine	10.133 \| good	0.79 \| good	16.345 \| good	0.563 \| good
2026-01-22T14:00:00.000Z	62 \| moderate	14.665 \| fine	55.273 \| fine	11.602 \| good	0.736 \| good	15.706 \| good	0.586 \| good
2026-01-22T15:00:00.000Z	52 \| moderate	10.367 \| good	49.705 \| good	11.902 \| good	0.761 \| good	15.048 \| good	0.63 \| good
2026-01-22T16:00:00.000Z	54 \| moderate	11.129 \| good	51.228 \| good	12.63 \| good	0.761 \| good	17.398 \| good	0.707 \| good
2026-01-22T17:00:00.000Z	52 \| moderate	9.537 \| good	46.442 \| good	12.701 \| good	0.82 \| good	17.87 \| good	0.744 \| good
2026-01-22T18:00:00.000Z	58 \| moderate	12.958 \| fine	39.732 \| good	15.239 \| good	0.953 \| good	14.612 \| good	0.635 \| good
2026-01-22T19:00:00.000Z	64 \| moderate	15.961 \| fine	67.551 \| fine	16.733 \| good	0.923 \| good	15.366 \| good	0.578 \| good
2026-01-22T20:00:00.000Z	69 \| moderate	18.543 \| fine	65.471 \| fine	12.456 \| good	1.067 \| good	13.589 \| good	0.523 \| good
2026-01-22T21:00:00.000Z	64 \| moderate	16.478 \| fine	54.297 \| good	13.764 \| good	0.976 \| good	15.122 \| good	0.487 \| good
2026-01-22T22:00:00.000Z	66 \| moderate	16.672 \| fine	43.224 \| good	14.07 \| good	0.796 \| good	12.731 \| good	0.377 \| good
2026-01-22T23:00:00.000Z	56 \| moderate	12.197 \| fine	53.526 \| good	19.21 \| good	0.981 \| good	17.873 \| good	0.425 \| good
2026-01-23T00:00:00.000Z	67 \| moderate	17.955 \| fine	62.471 \| fine	19.607 \| good	0.916 \| good	12.924 \| good	0.408 \| good
2026-01-23T01:00:00.000Z	56 \| moderate	11.8 \| good	45.151 \| good	22.138 \| good	0.824 \| good	12.069 \| good	0.349 \| good
2026-01-23T02:00:00.000Z	58 \| moderate	13.04 \| fine	54.347 \| good	23.535 \| good	1.505 \| good	12.164 \| good	0.394 \| good
2026-01-23T03:00:00.000Z	54 \| moderate	11.233 \| good	44.972 \| good	21.457 \| good	0.887 \| good	17.473 \| good	0.485 \| good
2026-01-23T04:00:00.000Z	58 \| moderate	12.912 \| fine	50.172 \| good	20.869 \| good	0.7 \| good	19.35 \| good	0.408 \| good
2026-01-23T05:00:00.000Z	56 \| moderate	11.957 \| good	40.681 \| good	18.095 \| good	0.597 \| good	22.791 \| good	0.542 \| good
2026-01-23T06:00:00.000Z	60 \| moderate	14.369 \| fine	53.381 \| good	16.6 \| good	0.486 \| good	16.557 \| good	0.478 \| good
2026-01-23T07:00:00.000Z	54 \| moderate	11.315 \| good	60.172 \| fine	11.705 \| good	0.432 \| good	19.375 \| good	0.533 \| good
2026-01-23T08:00:00.000Z	60 \| moderate	14.256 \| fine	48.357 \| good	11.763 \| good	0.456 \| good	19.819 \| good	0.478 \| good
2026-01-23T09:00:00.000Z	67 \| moderate	18.19 \| fine	49.496 \| good	10.866 \| good	0.492 \| good	18.192 \| good	0.432 \| good
2026-01-23T10:00:00.000Z	64 \| moderate	15.744 \| fine	55.283 \| fine	12.041 \| good	0.551 \| good	16.352 \| good	0.457 \| good
2026-01-23T11:00:00.000Z	63 \| moderate	15.419 \| fine	78.502 \| fine	10.016 \| good	0.524 \| good	16.02 \| good	0.459 \| good
2026-01-23T12:00:00.000Z	58 \| moderate	12.725 \| fine	50.487 \| good	10.512 \| good	0.381 \| good	13.519 \| good	0.448 \| good
2026-01-23T13:00:00.000Z	56 \| moderate	11.743 \| good	51.259 \| good	11.042 \| good	0.904 \| good	12.649 \| good	0.316 \| good
2026-01-23T14:00:00.000Z	52 \| moderate	10.457 \| good	40.331 \| good	11.614 \| good	0.849 \| good	12.925 \| good	0.316 \| good
2026-01-23T15:00:00.000Z	56 \| moderate	11.95 \| good	42.01 \| good	13.474 \| good	0.847 \| good	12.313 \| good	0.374 \| good
2026-01-23T16:00:00.000Z	56 \| moderate	12.087 \| good	44.702 \| good	15.646 \| good	0.669 \| good	11.733 \| good	0.374 \| good
2026-01-23T17:00:00.000Z	58 \| moderate	11.014 \| good	69.114 \| fine	16.64 \| good	0.604 \| good	10.876 \| good	0.376 \| good
2026-01-23T18:00:00.000Z	54 \| moderate	11.069 \| good	47.96 \| good	16.815 \| good	0.648 \| good	9.517 \| good	0.314 \| good
2026-01-23T19:00:00.000Z	54 \| moderate	10.875 \| good	50.456 \| good	15.969 \| good	0.774 \| good	8.273 \| good	0.358 \| good
2026-01-23T20:00:00.000Z	54 \| moderate	10.548 \| good	35.176 \| good	15.518 \| good	0.884 \| good	8.004 \| good	0.317 \| good
2026-01-23T21:00:00.000Z	54 \| moderate	10.801 \| good	51.039 \| good	15.996 \| good	0.741 \| good	9.461 \| good	0.389 \| good
2026-01-23T22:00:00.000Z	56 \| moderate	12.389 \| fine	45.795 \| good	16.759 \| good	0.653 \| good	8.676 \| good	0.389 \| good
2026-01-23T23:00:00.000Z	56 \| moderate	12.349 \| fine	47.62 \| good	17.182 \| good	0.645 \| good	8.812 \| good	0.373 \| good
2026-01-23T22:00:00.000Z	71 \| moderate	19.921 \| fine	87.261 \| fine	32.046 \| good	3.368 \| good	12.324 \| good	0.243 \| good
2026-01-23T23:00:00.000Z	71 \| moderate	20.315 \| fine	89.819 \| fine	32.166 \| good	3.451 \| good	13.201 \| good	0.244 \| good
2026-01-24T00:00:00.000Z	88 \| moderate	29.065 \| fine	125.731 \| fine	23.954 \| good	3.535 \| good	14.077 \| good	0.246 \| good
2026-01-24T01:00:00.000Z	84 \| moderate	26.909 \| fine	116.572 \| fine	11.218 \| good	3.564 \| good	20.309 \| good	0.308 \| good
2026-01-24T02:00:00.000Z	90 \| moderate	29.797 \| fine	128.793 \| fine	10.059 \| good	3.594 \| good	26.541 \| good	0.369 \| good
2026-01-24T03:00:00.000Z	86 \| moderate	28.121 \| fine	122.618 \| fine	10.056 \| good	3.623 \| good	32.773 \| good	0.431 \| good
2026-01-24T04:00:00.000Z	84 \| moderate	26.966 \| fine	117.089 \| fine	11.054 \| good	3.953 \| good	32.846 \| good	0.465 \| good
2026-01-24T05:00:00.000Z	82 \| moderate	25.516 \| fine	110.938 \| fine	10.979 \| good	4.283 \| good	32.919 \| good	0.498 \| good
2026-01-24T06:00:00.000Z	82 \| moderate	25.781 \| fine	112.729 \| fine	11.374 \| good	4.612 \| good	32.991 \| good	0.532 \| good
2026-01-24T07:00:00.000Z	82 \| moderate	25.556 \| fine	111.592 \| fine	10.002 \| good	4.382 \| good	31.825 \| good	0.521 \| good
2026-01-24T08:00:00.000Z	79 \| moderate	23.829 \| fine	104.294 \| fine	12.028 \| good	4.153 \| good	30.659 \| good	0.511 \| good
2026-01-24T09:00:00.000Z	77 \| moderate	23.485 \| fine	102.358 \| fine	11.928 \| good	3.923 \| good	29.492 \| good	0.501 \| good
2026-01-24T10:00:00.000Z	73 \| moderate	21.039 \| fine	92.651 \| fine	14.196 \| good	3.597 \| good	27.529 \| good	0.483 \| good
2026-01-24T11:00:00.000Z	67 \| moderate	18.297 \| fine	80.623 \| fine	16.792 \| good	3.272 \| good	25.566 \| good	0.464 \| good
2026-01-24T12:00:00.000Z	64 \| moderate	15.64 \| fine	69.502 \| fine	14.69 \| good	2.946 \| good	23.603 \| good	0.446 \| good
2026-01-24T13:00:00.000Z	56 \| moderate	11.65 \| good	51.97 \| good	14.1 \| good	3.006 \| good	23.537 \| good	0.414 \| good
2026-01-24T14:00:00.000Z	22 \| good	4.485 \| good	19.344 \| good	16.64 \| good	3.067 \| good	23.47 \| good	0.383 \| good
2026-01-24T15:00:00.000Z	27 \| good	4.981 \| good	21.321 \| good	18.794 \| good	3.127 \| good	23.404 \| good	0.351 \| good
2026-01-24T16:00:00.000Z	22 \| good	4.161 \| good	18.287 \| good	22.596 \| good	2.591 \| good	19.607 \| good	0.31 \| good
2026-01-24T17:00:00.000Z	27 \| good	5.052 \| good	21.817 \| good	28.337 \| good	2.055 \| good	15.81 \| good	0.269 \| good
2026-01-24T18:00:00.000Z	27 \| good	5.181 \| good	22.783 \| good	28.76 \| good	1.519 \| good	12.014 \| good	0.228 \| good
2026-01-24T19:00:00.000Z	33 \| good	5.746 \| good	25.167 \| good	29.49 \| good	1.297 \| good	9.272 \| good	0.199 \| good
2026-01-24T20:00:00.000Z	30 \| good	4.181 \| good	18.467 \| good	31.771 \| good	1.076 \| good	6.531 \| good	0.171 \| good
2026-01-24T21:00:00.000Z	30 \| good	2.331 \| good	9.465 \| good	32.353 \| good	0.854 \| good	3.79 \| good	0.143 \| good
2026-01-24T22:00:00.000Z	30 \| good	1.374 \| good	5.583 \| good	32.294 \| good	0.839 \| good	4.056 \| good	0.142 \| good
2026-01-24T23:00:00.000Z	30 \| good	1.639 \| good	6.794 \| good	32.246 \| good	0.825 \| good	4.322 \| good	0.142 \| good
2026-01-25T00:00:00.000Z	29 \| good	2.362 \| good	9.705 \| good	31.464 \| good	0.81 \| good	4.588 \| good	0.141 \| good
2026-01-25T01:00:00.000Z	25 \| good	2.061 \| good	8.62 \| good	26.628 \| good	0.985 \| good	12.337 \| good	0.188 \| good
2026-01-25T02:00:00.000Z	21 \| good	3.136 \| good	13.47 \| good	23.106 \| good	1.161 \| good	20.087 \| good	0.235 \| good
2026-01-25T03:00:00.000Z	26 \| good	3.55 \| good	15.35 \| good	23.727 \| good	1.336 \| good	27.837 \| good	0.281 \| good
2026-01-25T04:00:00.000Z	26 \| good	4.01 \| good	17.433 \| good	23.287 \| good	1.415 \| good	28.181 \| good	0.288 \| good
2026-01-25T05:00:00.000Z	27 \| good	5.284 \| good	23.01 \| good	22.597 \| good	1.493 \| good	28.526 \| good	0.295 \| good
2026-01-25T06:00:00.000Z	27 \| good	4.841 \| good	21.115 \| good	22.483 \| good	1.572 \| good	28.87 \| good	0.302 \| good
2026-01-25T07:00:00.000Z	26 \| good	3.99 \| good	17.452 \| good	22.922 \| good	1.416 \| good	27.702 \| good	0.299 \| good
2026-01-25T08:00:00.000Z	27 \| good	4.71 \| good	20.415 \| good	23.27 \| good	1.261 \| good	26.534 \| good	0.296 \| good
2026-01-25T09:00:00.000Z	27 \| good	5.239 \| good	22.466 \| good	22.981 \| good	1.105 \| good	25.367 \| good	0.293 \| good
2026-01-25T10:00:00.000Z	27 \| good	4.929 \| good	21.164 \| good	22.577 \| good	1.014 \| good	24.023 \| good	0.28 \| good
2026-01-25T11:00:00.000Z	38 \| good	7.376 \| good	32.382 \| good	21.721 \| good	0.923 \| good	22.679 \| good	0.267 \| good
2026-01-25T12:00:00.000Z	38 \| good	6.604 \| good	29.003 \| good	20.986 \| good	0.832 \| good	21.335 \| good	0.254 \| good
2026-01-25T13:00:00.000Z	33 \| good	5.58 \| good	24.322 \| good	20.661 \| good	0.92 \| good	21.405 \| good	0.254 \| good
2026-01-25T14:00:00.000Z	20 \| good	2.712 \| good	11.227 \| good	20.76 \| good	1.008 \| good	21.475 \| good	0.253 \| good
2026-01-25T15:00:00.000Z	22 \| good	3.765 \| good	16.385 \| good	20.523 \| good	1.096 \| good	21.545 \| good	0.253 \| good
2026-01-25T16:00:00.000Z	22 \| good	4.193 \| good	18.33 \| good	20.621 \| good	1.21 \| good	19.737 \| good	0.26 \| good
2026-01-25T17:00:00.000Z	38 \| good	7.126 \| good	31.603 \| good	19.958 \| good	1.325 \| good	17.928 \| good	0.268 \| good
2026-01-25T18:00:00.000Z	38 \| good	7.187 \| good	31.774 \| good	22.122 \| good	1.439 \| good	16.12 \| good	0.275 \| good
2026-01-25T19:00:00.000Z	44 \| good	7.673 \| good	33.789 \| good	24.104 \| good	1.506 \| good	13.625 \| good	0.252 \| good
2026-01-25T20:00:00.000Z	44 \| good	7.566 \| good	33.382 \| good	23.1 \| good	1.574 \| good	11.13 \| good	0.229 \| good
2026-01-25T21:00:00.000Z	44 \| good	7.622 \| good	33.516 \| good	23.973 \| good	1.642 \| good	8.636 \| good	0.205 \| 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)

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

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