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

The current PM10 levels in Foster City, California are 51.301 μg/m3.

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

The current sulfur dioxide (SO2) levels in Foster City, California are 0.813 ppb.

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

The current ozone (O3) levels at Foster City, California is 11.82 ppm.

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

The current nitrogen dioxide (NO2) levels at Foster City, California is 7.545 ppb.

Real-time air quality index in Foster City, California today

Q: What are the current PM2.5 levels in Foster City, California?

The measured PM2.5 levels in Foster City, California at present are 11.32 μg/m3.

Stay updated with real-time air quality in Foster City, California featuring accurate data on AQI, PM_2.5, PM₁₀, O₃, NO₂, SO₂, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.

Live AQI (Air Quality Index)

Moderate

Foster City, California

Last updated: ... (Local time)

Common air pollutants in Foster City, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

12.84 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

56.85 μg/m³

155

255

425

605+

Ozone (O₃)

17.71 ppb

201

201+

Sulfur Dioxide (SO₂)

0.73 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

8.38 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.44 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Foster City, California

Get Live Pollen Counts

Foster City, California

Scroll To Air Quality Map

Track live Foster City, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-01-22T00:00:00.000Z	58 \| moderate	12.851 \| fine	56.947 \| fine	8.849 \| good	0.869 \| good	16.913 \| good	0.543 \| good
2026-01-22T01:00:00.000Z	60 \| moderate	13.61 \| fine	60.707 \| fine	8.868 \| good	0.835 \| good	19.045 \| good	0.595 \| good
2026-01-22T02:00:00.000Z	60 \| moderate	14.05 \| fine	62.896 \| fine	6.675 \| good	0.773 \| good	19.285 \| good	0.637 \| good
2026-01-22T03:00:00.000Z	60 \| moderate	13.996 \| fine	62.359 \| fine	5.108 \| good	0.813 \| good	20.263 \| good	0.608 \| good
2026-01-22T04:00:00.000Z	58 \| moderate	12.9 \| fine	57.224 \| fine	5.496 \| good	0.78 \| good	20.815 \| good	0.542 \| good
2026-01-22T05:00:00.000Z	58 \| moderate	13.445 \| fine	59.171 \| fine	5.455 \| good	0.78 \| good	21.33 \| good	0.597 \| good
2026-01-22T06:00:00.000Z	62 \| moderate	14.504 \| fine	63.603 \| fine	3.422 \| good	0.845 \| good	19.883 \| good	0.793 \| good
2026-01-22T07:00:00.000Z	62 \| moderate	14.623 \| fine	65.088 \| fine	5.993 \| good	0.829 \| good	20.963 \| good	0.809 \| good
2026-01-22T08:00:00.000Z	62 \| moderate	14.528 \| fine	62.273 \| fine	5.675 \| good	0.903 \| good	19.032 \| good	0.778 \| good
2026-01-22T09:00:00.000Z	60 \| moderate	13.577 \| fine	61.479 \| fine	4.56 \| good	0.831 \| good	18.374 \| good	0.68 \| good
2026-01-22T10:00:00.000Z	60 \| moderate	14.191 \| fine	60.933 \| fine	5.692 \| good	0.84 \| good	16.615 \| good	0.593 \| good
2026-01-22T11:00:00.000Z	58 \| moderate	12.745 \| fine	56.488 \| fine	4.729 \| good	0.807 \| good	16.012 \| good	0.599 \| good
2026-01-22T12:00:00.000Z	58 \| moderate	12.676 \| fine	55.536 \| fine	4.32 \| good	0.783 \| good	15.71 \| good	0.599 \| good
2026-01-22T13:00:00.000Z	56 \| moderate	12.449 \| fine	55.666 \| fine	3.576 \| good	0.792 \| good	16.136 \| good	0.614 \| good
2026-01-22T14:00:00.000Z	56 \| moderate	12.437 \| fine	53.718 \| good	3.796 \| good	0.755 \| good	14.452 \| good	0.596 \| good
2026-01-22T15:00:00.000Z	54 \| moderate	11.077 \| good	50.057 \| good	3.208 \| good	0.787 \| good	13.633 \| good	0.75 \| good
2026-01-22T16:00:00.000Z	54 \| moderate	11.369 \| good	50.523 \| good	2.605 \| good	0.76 \| good	17.049 \| good	0.984 \| good
2026-01-22T17:00:00.000Z	52 \| moderate	10.216 \| good	45.486 \| good	3.237 \| good	0.82 \| good	16.873 \| good	0.859 \| good
2026-01-22T18:00:00.000Z	64 \| moderate	15.777 \| fine	68.05 \| fine	4.322 \| good	0.955 \| good	13.086 \| good	0.592 \| good
2026-01-22T19:00:00.000Z	64 \| moderate	16.35 \| fine	72.966 \| fine	5.613 \| good	0.924 \| good	13.027 \| good	0.577 \| good
2026-01-22T20:00:00.000Z	64 \| moderate	16.163 \| fine	69.887 \| fine	5.94 \| good	1.065 \| good	13.576 \| good	0.562 \| good
2026-01-22T21:00:00.000Z	64 \| moderate	16.079 \| fine	68.858 \| fine	6.924 \| good	0.977 \| good	13.108 \| good	0.557 \| good
2026-01-22T22:00:00.000Z	62 \| moderate	14.956 \| fine	63.939 \| fine	9.356 \| good	0.79 \| good	12.253 \| good	0.455 \| good
2026-01-22T23:00:00.000Z	60 \| moderate	13.677 \| fine	61.457 \| fine	13.333 \| good	0.951 \| good	12.771 \| good	0.463 \| good
2026-01-23T00:00:00.000Z	60 \| moderate	13.78 \| fine	59.605 \| fine	16.068 \| good	0.896 \| good	11.828 \| good	0.463 \| good
2026-01-23T01:00:00.000Z	56 \| moderate	12.432 \| fine	55.033 \| fine	17.931 \| good	0.816 \| good	14.647 \| good	0.428 \| good
2026-01-23T02:00:00.000Z	58 \| moderate	12.585 \| fine	56.892 \| fine	17.88 \| good	1.324 \| good	16.213 \| good	0.508 \| good
2026-01-23T03:00:00.000Z	54 \| moderate	11.375 \| good	49.631 \| good	15.098 \| good	0.839 \| good	18.798 \| good	0.493 \| good
2026-01-23T04:00:00.000Z	54 \| moderate	10.935 \| good	48.019 \| good	14.202 \| good	0.685 \| good	17.863 \| good	0.551 \| good
2026-01-23T05:00:00.000Z	54 \| moderate	10.842 \| good	46.997 \| good	13.106 \| good	0.59 \| good	17.519 \| good	0.632 \| good
2026-01-23T06:00:00.000Z	56 \| moderate	11.66 \| good	50.374 \| good	9.813 \| good	0.502 \| good	16.847 \| good	0.614 \| good
2026-01-23T07:00:00.000Z	54 \| moderate	11.201 \| good	50.689 \| good	6.561 \| good	0.437 \| good	18.505 \| good	0.645 \| good
2026-01-23T08:00:00.000Z	58 \| moderate	12.787 \| fine	56.28 \| fine	5.833 \| good	0.453 \| good	15.202 \| good	0.568 \| good
2026-01-23T09:00:00.000Z	58 \| moderate	13.439 \| fine	56.621 \| fine	5.133 \| good	0.495 \| good	14.141 \| good	0.504 \| good
2026-01-23T10:00:00.000Z	56 \| moderate	12.5 \| fine	53.841 \| good	4.474 \| good	0.571 \| good	12.058 \| good	0.517 \| good
2026-01-23T11:00:00.000Z	58 \| moderate	12.801 \| fine	58.636 \| fine	4.291 \| good	0.55 \| good	11.492 \| good	0.459 \| good
2026-01-23T12:00:00.000Z	54 \| moderate	11.146 \| good	48.814 \| good	9.674 \| good	0.384 \| good	11.196 \| good	0.458 \| good
2026-01-23T13:00:00.000Z	54 \| moderate	10.972 \| good	48.621 \| good	5.903 \| good	0.926 \| good	10.899 \| good	0.411 \| good
2026-01-23T14:00:00.000Z	52 \| moderate	9.72 \| good	42.696 \| good	5.2 \| good	0.931 \| good	11.821 \| good	0.411 \| good
2026-01-23T15:00:00.000Z	52 \| moderate	9.752 \| good	42.668 \| good	6.302 \| good	0.896 \| good	14.016 \| good	0.476 \| good
2026-01-23T16:00:00.000Z	49 \| good	8.949 \| good	38.215 \| good	7.652 \| good	0.749 \| good	14.166 \| good	0.476 \| good
2026-01-23T17:00:00.000Z	49 \| good	8.96 \| good	41.843 \| good	8.492 \| good	0.659 \| good	11.214 \| good	0.407 \| good
2026-01-23T18:00:00.000Z	49 \| good	9.171 \| good	40.142 \| good	10.483 \| good	0.65 \| good	10.988 \| good	0.401 \| good
2026-01-23T19:00:00.000Z	54 \| moderate	11.32 \| good	51.301 \| good	11.82 \| good	0.813 \| good	7.545 \| good	0.415 \| good
2026-01-23T20:00:00.000Z	58 \| moderate	12.525 \| fine	55.401 \| fine	13.965 \| good	1.007 \| good	8.673 \| good	0.411 \| good
2026-01-23T21:00:00.000Z	56 \| moderate	11.967 \| good	54.39 \| good	15.569 \| good	0.822 \| good	8.388 \| good	0.418 \| good
2026-01-23T22:00:00.000Z	58 \| moderate	12.841 \| fine	56.852 \| fine	17.706 \| good	0.732 \| good	8.38 \| good	0.437 \| good
2026-01-23T23:00:00.000Z	58 \| moderate	12.688 \| fine	55.83 \| fine	17.829 \| good	0.847 \| good	8.013 \| good	0.413 \| good
2026-01-23T23:00:00.000Z	58 \| moderate	12.841 \| fine	56.852 \| fine	17.706 \| good	0.732 \| good	8.38 \| good	0.437 \| good
2026-01-23T21:00:00.000Z	56 \| moderate	12.025 \| good	54.141 \| good	25.817 \| good	2.167 \| good	6.867 \| good	0.213 \| good
2026-01-23T22:00:00.000Z	66 \| moderate	16.985 \| fine	75.53 \| fine	27.218 \| good	2.29 \| good	7.604 \| good	0.214 \| good
2026-01-23T23:00:00.000Z	77 \| moderate	22.702 \| fine	99.211 \| fine	24.364 \| good	2.414 \| good	8.341 \| good	0.216 \| good
2026-01-24T00:00:00.000Z	88 \| moderate	28.586 \| fine	124.535 \| fine	16.866 \| good	2.537 \| good	9.078 \| good	0.217 \| good
2026-01-24T01:00:00.000Z	73 \| moderate	20.928 \| fine	91.826 \| fine	12.672 \| good	2.479 \| good	12.381 \| good	0.244 \| good
2026-01-24T02:00:00.000Z	67 \| moderate	17.844 \| fine	79.17 \| fine	17.174 \| good	2.42 \| good	15.683 \| good	0.27 \| good
2026-01-24T03:00:00.000Z	60 \| moderate	14.025 \| fine	63.167 \| fine	20.814 \| good	2.362 \| good	18.986 \| good	0.297 \| good
2026-01-24T04:00:00.000Z	60 \| moderate	13.949 \| fine	63.121 \| fine	21.83 \| good	2.447 \| good	19.915 \| good	0.31 \| good
2026-01-24T05:00:00.000Z	58 \| moderate	13.225 \| fine	59.469 \| fine	20.293 \| good	2.533 \| good	20.843 \| good	0.324 \| good
2026-01-24T06:00:00.000Z	58 \| moderate	13.243 \| fine	59.512 \| fine	17.299 \| good	2.618 \| good	21.772 \| good	0.337 \| good
2026-01-24T07:00:00.000Z	56 \| moderate	12.307 \| fine	55.455 \| fine	15.873 \| good	2.459 \| good	20.937 \| good	0.333 \| good
2026-01-24T08:00:00.000Z	52 \| moderate	10.04 \| good	44.804 \| good	15.889 \| good	2.299 \| good	20.101 \| good	0.33 \| good
2026-01-24T09:00:00.000Z	52 \| moderate	9.853 \| good	43.778 \| good	13.316 \| good	2.14 \| good	19.266 \| good	0.326 \| good
2026-01-24T10:00:00.000Z	44 \| good	8.347 \| good	36.388 \| good	11.807 \| good	2.129 \| good	19.377 \| good	0.325 \| good
2026-01-24T11:00:00.000Z	52 \| moderate	9.511 \| good	42.038 \| good	10.793 \| good	2.118 \| good	19.488 \| good	0.324 \| good
2026-01-24T12:00:00.000Z	54 \| moderate	10.815 \| good	47.769 \| good	7.671 \| good	2.108 \| good	19.599 \| good	0.323 \| good
2026-01-24T13:00:00.000Z	58 \| moderate	12.52 \| fine	55.619 \| fine	6.445 \| good	2.277 \| good	20.338 \| good	0.312 \| good
2026-01-24T14:00:00.000Z	58 \| moderate	13.086 \| fine	58.663 \| fine	3.919 \| good	2.446 \| good	21.076 \| good	0.302 \| good
2026-01-24T15:00:00.000Z	66 \| moderate	17.009 \| fine	75.019 \| fine	3.059 \| good	2.615 \| good	21.815 \| good	0.292 \| good
2026-01-24T16:00:00.000Z	64 \| moderate	16.13 \| fine	71.18 \| fine	7.452 \| good	2.41 \| good	19.643 \| good	0.28 \| good
2026-01-24T17:00:00.000Z	66 \| moderate	16.617 \| fine	73.382 \| fine	14.416 \| good	2.206 \| good	17.471 \| good	0.268 \| good
2026-01-24T18:00:00.000Z	58 \| moderate	13.369 \| fine	60.427 \| fine	20.248 \| good	2.002 \| good	15.299 \| good	0.255 \| good
2026-01-24T19:00:00.000Z	56 \| moderate	12.405 \| fine	55.06 \| fine	21.322 \| good	1.708 \| good	11.956 \| good	0.221 \| good
2026-01-24T20:00:00.000Z	49 \| good	8.716 \| good	38.021 \| good	24.037 \| good	1.415 \| good	8.613 \| good	0.186 \| good
2026-01-24T21:00:00.000Z	33 \| good	5.844 \| good	26.323 \| good	26.552 \| good	1.121 \| good	5.27 \| good	0.151 \| good
2026-01-24T22:00:00.000Z	27 \| good	2.757 \| good	11.664 \| good	28.691 \| good	1.125 \| good	5.958 \| good	0.151 \| good
2026-01-24T23:00:00.000Z	26 \| good	2.093 \| good	8.543 \| good	28.219 \| good	1.13 \| good	6.647 \| good	0.152 \| good
2026-01-25T00:00:00.000Z	25 \| good	2.259 \| good	9.47 \| good	27.077 \| good	1.134 \| good	7.335 \| good	0.153 \| good
2026-01-25T01:00:00.000Z	19 \| good	1.655 \| good	6.71 \| good	19.668 \| good	1.28 \| good	13.876 \| good	0.188 \| good
2026-01-25T02:00:00.000Z	22 \| good	3.836 \| good	16.927 \| good	13.793 \| good	1.426 \| good	20.416 \| good	0.222 \| good
2026-01-25T03:00:00.000Z	27 \| good	5.016 \| good	21.755 \| good	10.124 \| good	1.572 \| good	26.956 \| good	0.257 \| good
2026-01-25T04:00:00.000Z	33 \| good	5.687 \| good	24.519 \| good	7.835 \| good	1.65 \| good	28.248 \| good	0.268 \| good
2026-01-25T05:00:00.000Z	38 \| good	6.632 \| good	29.142 \| good	8.041 \| good	1.729 \| good	29.539 \| good	0.278 \| good
2026-01-25T06:00:00.000Z	33 \| good	5.598 \| good	24.324 \| good	8.623 \| good	1.808 \| good	30.831 \| good	0.289 \| good
2026-01-25T07:00:00.000Z	33 \| good	5.664 \| good	24.394 \| good	7.389 \| good	1.615 \| good	29.9 \| good	0.286 \| good
2026-01-25T08:00:00.000Z	38 \| good	6.514 \| good	28.989 \| good	7.14 \| good	1.423 \| good	28.968 \| good	0.283 \| good
2026-01-25T09:00:00.000Z	44 \| good	7.999 \| good	35.111 \| good	6.062 \| good	1.231 \| good	28.037 \| good	0.28 \| good
2026-01-25T10:00:00.000Z	44 \| good	7.765 \| good	34.059 \| good	5.075 \| good	1.124 \| good	26.629 \| good	0.27 \| good
2026-01-25T11:00:00.000Z	52 \| moderate	9.528 \| good	42.451 \| good	6.027 \| good	1.017 \| good	25.221 \| good	0.26 \| good
2026-01-25T12:00:00.000Z	44 \| good	8.358 \| good	36.82 \| good	5.776 \| good	0.91 \| good	23.812 \| good	0.25 \| good
2026-01-25T13:00:00.000Z	38 \| good	7.46 \| good	32.605 \| good	5.961 \| good	0.984 \| good	23.354 \| good	0.245 \| good
2026-01-25T14:00:00.000Z	27 \| good	5.137 \| good	22.317 \| good	5.984 \| good	1.058 \| good	22.896 \| good	0.24 \| good
2026-01-25T15:00:00.000Z	27 \| good	5.389 \| good	23.388 \| good	5.847 \| good	1.133 \| good	22.437 \| good	0.235 \| good
2026-01-25T16:00:00.000Z	33 \| good	5.943 \| good	26.055 \| good	6.683 \| good	1.248 \| good	20.821 \| good	0.249 \| good
2026-01-25T17:00:00.000Z	54 \| moderate	10.774 \| good	47.797 \| good	10.084 \| good	1.363 \| good	19.205 \| good	0.263 \| good
2026-01-25T18:00:00.000Z	52 \| moderate	10.092 \| good	44.495 \| good	13.904 \| good	1.478 \| good	17.589 \| good	0.278 \| good
2026-01-25T19:00:00.000Z	52 \| moderate	10.352 \| good	46.128 \| good	16.312 \| good	1.584 \| good	15.951 \| good	0.259 \| good
2026-01-25T20:00:00.000Z	52 \| moderate	10.191 \| good	45.004 \| good	18.23 \| good	1.69 \| good	14.313 \| good	0.241 \| good

Foster City

Empower business decisions with accurate air quality data

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

0.35ppm

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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Frequently asked questions

How frequently is the air quality data for Foster City, California updated?

Air quality data for Foster City, California is updated on an hourly basis.

When did Foster City, California experience the worst air quality in the last 24 hours?

The worst air quality in Foster City, California was recorded at 09:00:00 on 2026-01-22.

When did Foster City, California have its best air quality in the last 24 hours?

The best air quality in Foster City, California was recorded at 06:00:00 on 2026-01-23.

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

The real-time air quality index in Foster City, California is 54, currently categorized as Moderate.

Which pollutant is found most often in Foster City, California?

The most common pollutant in Foster City, California is PM2.5.

What can I do if the air quality in Foster City, California is poor?

If the air quality in Foster City, California is poor, limit outdoor activities and use a mask to safeguard your health.

What are the current PM_2.5 levels in Foster City, California?

The measured PM_2.5 levels in Foster City, California at present are 11.32 μg/m³.

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

The current PM₁₀ levels in Foster City, California are 51.301 μg/m³.

What are the current carbon monoxide (CO) levels at Foster City, California?

The current carbon monoxide (CO) level in Foster City, California is 0.415 ppm.

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

The current sulfur dioxide (SO₂) levels in Foster City, California are 0.813 ppb.

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

The current ozone (O₃) levels at Foster City, California is 11.82 ppm.

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

The current nitrogen dioxide (NO₂) levels at Foster City, California is 7.545 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-01-22T00:00:00.000Z	58 \| moderate	12.851 \| fine	56.947 \| fine	8.849 \| good	0.869 \| good	16.913 \| good	0.543 \| good
2026-01-22T01:00:00.000Z	60 \| moderate	13.61 \| fine	60.707 \| fine	8.868 \| good	0.835 \| good	19.045 \| good	0.595 \| good
2026-01-22T02:00:00.000Z	60 \| moderate	14.05 \| fine	62.896 \| fine	6.675 \| good	0.773 \| good	19.285 \| good	0.637 \| good
2026-01-22T03:00:00.000Z	60 \| moderate	13.996 \| fine	62.359 \| fine	5.108 \| good	0.813 \| good	20.263 \| good	0.608 \| good
2026-01-22T04:00:00.000Z	58 \| moderate	12.9 \| fine	57.224 \| fine	5.496 \| good	0.78 \| good	20.815 \| good	0.542 \| good
2026-01-22T05:00:00.000Z	58 \| moderate	13.445 \| fine	59.171 \| fine	5.455 \| good	0.78 \| good	21.33 \| good	0.597 \| good
2026-01-22T06:00:00.000Z	62 \| moderate	14.504 \| fine	63.603 \| fine	3.422 \| good	0.845 \| good	19.883 \| good	0.793 \| good
2026-01-22T07:00:00.000Z	62 \| moderate	14.623 \| fine	65.088 \| fine	5.993 \| good	0.829 \| good	20.963 \| good	0.809 \| good
2026-01-22T08:00:00.000Z	62 \| moderate	14.528 \| fine	62.273 \| fine	5.675 \| good	0.903 \| good	19.032 \| good	0.778 \| good
2026-01-22T09:00:00.000Z	60 \| moderate	13.577 \| fine	61.479 \| fine	4.56 \| good	0.831 \| good	18.374 \| good	0.68 \| good
2026-01-22T10:00:00.000Z	60 \| moderate	14.191 \| fine	60.933 \| fine	5.692 \| good	0.84 \| good	16.615 \| good	0.593 \| good
2026-01-22T11:00:00.000Z	58 \| moderate	12.745 \| fine	56.488 \| fine	4.729 \| good	0.807 \| good	16.012 \| good	0.599 \| good
2026-01-22T12:00:00.000Z	58 \| moderate	12.676 \| fine	55.536 \| fine	4.32 \| good	0.783 \| good	15.71 \| good	0.599 \| good
2026-01-22T13:00:00.000Z	56 \| moderate	12.449 \| fine	55.666 \| fine	3.576 \| good	0.792 \| good	16.136 \| good	0.614 \| good
2026-01-22T14:00:00.000Z	56 \| moderate	12.437 \| fine	53.718 \| good	3.796 \| good	0.755 \| good	14.452 \| good	0.596 \| good
2026-01-22T15:00:00.000Z	54 \| moderate	11.077 \| good	50.057 \| good	3.208 \| good	0.787 \| good	13.633 \| good	0.75 \| good
2026-01-22T16:00:00.000Z	54 \| moderate	11.369 \| good	50.523 \| good	2.605 \| good	0.76 \| good	17.049 \| good	0.984 \| good
2026-01-22T17:00:00.000Z	52 \| moderate	10.216 \| good	45.486 \| good	3.237 \| good	0.82 \| good	16.873 \| good	0.859 \| good
2026-01-22T18:00:00.000Z	64 \| moderate	15.777 \| fine	68.05 \| fine	4.322 \| good	0.955 \| good	13.086 \| good	0.592 \| good
2026-01-22T19:00:00.000Z	64 \| moderate	16.35 \| fine	72.966 \| fine	5.613 \| good	0.924 \| good	13.027 \| good	0.577 \| good
2026-01-22T20:00:00.000Z	64 \| moderate	16.163 \| fine	69.887 \| fine	5.94 \| good	1.065 \| good	13.576 \| good	0.562 \| good
2026-01-22T21:00:00.000Z	64 \| moderate	16.079 \| fine	68.858 \| fine	6.924 \| good	0.977 \| good	13.108 \| good	0.557 \| good
2026-01-22T22:00:00.000Z	62 \| moderate	14.956 \| fine	63.939 \| fine	9.356 \| good	0.79 \| good	12.253 \| good	0.455 \| good
2026-01-22T23:00:00.000Z	60 \| moderate	13.677 \| fine	61.457 \| fine	13.333 \| good	0.951 \| good	12.771 \| good	0.463 \| good
2026-01-23T00:00:00.000Z	60 \| moderate	13.78 \| fine	59.605 \| fine	16.068 \| good	0.896 \| good	11.828 \| good	0.463 \| good
2026-01-23T01:00:00.000Z	56 \| moderate	12.432 \| fine	55.033 \| fine	17.931 \| good	0.816 \| good	14.647 \| good	0.428 \| good
2026-01-23T02:00:00.000Z	58 \| moderate	12.585 \| fine	56.892 \| fine	17.88 \| good	1.324 \| good	16.213 \| good	0.508 \| good
2026-01-23T03:00:00.000Z	54 \| moderate	11.375 \| good	49.631 \| good	15.098 \| good	0.839 \| good	18.798 \| good	0.493 \| good
2026-01-23T04:00:00.000Z	54 \| moderate	10.935 \| good	48.019 \| good	14.202 \| good	0.685 \| good	17.863 \| good	0.551 \| good
2026-01-23T05:00:00.000Z	54 \| moderate	10.842 \| good	46.997 \| good	13.106 \| good	0.59 \| good	17.519 \| good	0.632 \| good
2026-01-23T06:00:00.000Z	56 \| moderate	11.66 \| good	50.374 \| good	9.813 \| good	0.502 \| good	16.847 \| good	0.614 \| good
2026-01-23T07:00:00.000Z	54 \| moderate	11.201 \| good	50.689 \| good	6.561 \| good	0.437 \| good	18.505 \| good	0.645 \| good
2026-01-23T08:00:00.000Z	58 \| moderate	12.787 \| fine	56.28 \| fine	5.833 \| good	0.453 \| good	15.202 \| good	0.568 \| good
2026-01-23T09:00:00.000Z	58 \| moderate	13.439 \| fine	56.621 \| fine	5.133 \| good	0.495 \| good	14.141 \| good	0.504 \| good
2026-01-23T10:00:00.000Z	56 \| moderate	12.5 \| fine	53.841 \| good	4.474 \| good	0.571 \| good	12.058 \| good	0.517 \| good
2026-01-23T11:00:00.000Z	58 \| moderate	12.801 \| fine	58.636 \| fine	4.291 \| good	0.55 \| good	11.492 \| good	0.459 \| good
2026-01-23T12:00:00.000Z	54 \| moderate	11.146 \| good	48.814 \| good	9.674 \| good	0.384 \| good	11.196 \| good	0.458 \| good
2026-01-23T13:00:00.000Z	54 \| moderate	10.972 \| good	48.621 \| good	5.903 \| good	0.926 \| good	10.899 \| good	0.411 \| good
2026-01-23T14:00:00.000Z	52 \| moderate	9.72 \| good	42.696 \| good	5.2 \| good	0.931 \| good	11.821 \| good	0.411 \| good
2026-01-23T15:00:00.000Z	52 \| moderate	9.752 \| good	42.668 \| good	6.302 \| good	0.896 \| good	14.016 \| good	0.476 \| good
2026-01-23T16:00:00.000Z	49 \| good	8.949 \| good	38.215 \| good	7.652 \| good	0.749 \| good	14.166 \| good	0.476 \| good
2026-01-23T17:00:00.000Z	49 \| good	8.96 \| good	41.843 \| good	8.492 \| good	0.659 \| good	11.214 \| good	0.407 \| good
2026-01-23T18:00:00.000Z	49 \| good	9.171 \| good	40.142 \| good	10.483 \| good	0.65 \| good	10.988 \| good	0.401 \| good
2026-01-23T19:00:00.000Z	54 \| moderate	11.32 \| good	51.301 \| good	11.82 \| good	0.813 \| good	7.545 \| good	0.415 \| good
2026-01-23T20:00:00.000Z	58 \| moderate	12.525 \| fine	55.401 \| fine	13.965 \| good	1.007 \| good	8.673 \| good	0.411 \| good
2026-01-23T21:00:00.000Z	56 \| moderate	11.967 \| good	54.39 \| good	15.569 \| good	0.822 \| good	8.388 \| good	0.418 \| good
2026-01-23T22:00:00.000Z	58 \| moderate	12.841 \| fine	56.852 \| fine	17.706 \| good	0.732 \| good	8.38 \| good	0.437 \| good
2026-01-23T23:00:00.000Z	58 \| moderate	12.688 \| fine	55.83 \| fine	17.829 \| good	0.847 \| good	8.013 \| good	0.413 \| good
2026-01-23T23:00:00.000Z	58 \| moderate	12.841 \| fine	56.852 \| fine	17.706 \| good	0.732 \| good	8.38 \| good	0.437 \| good
2026-01-23T21:00:00.000Z	56 \| moderate	12.025 \| good	54.141 \| good	25.817 \| good	2.167 \| good	6.867 \| good	0.213 \| good
2026-01-23T22:00:00.000Z	66 \| moderate	16.985 \| fine	75.53 \| fine	27.218 \| good	2.29 \| good	7.604 \| good	0.214 \| good
2026-01-23T23:00:00.000Z	77 \| moderate	22.702 \| fine	99.211 \| fine	24.364 \| good	2.414 \| good	8.341 \| good	0.216 \| good
2026-01-24T00:00:00.000Z	88 \| moderate	28.586 \| fine	124.535 \| fine	16.866 \| good	2.537 \| good	9.078 \| good	0.217 \| good
2026-01-24T01:00:00.000Z	73 \| moderate	20.928 \| fine	91.826 \| fine	12.672 \| good	2.479 \| good	12.381 \| good	0.244 \| good
2026-01-24T02:00:00.000Z	67 \| moderate	17.844 \| fine	79.17 \| fine	17.174 \| good	2.42 \| good	15.683 \| good	0.27 \| good
2026-01-24T03:00:00.000Z	60 \| moderate	14.025 \| fine	63.167 \| fine	20.814 \| good	2.362 \| good	18.986 \| good	0.297 \| good
2026-01-24T04:00:00.000Z	60 \| moderate	13.949 \| fine	63.121 \| fine	21.83 \| good	2.447 \| good	19.915 \| good	0.31 \| good
2026-01-24T05:00:00.000Z	58 \| moderate	13.225 \| fine	59.469 \| fine	20.293 \| good	2.533 \| good	20.843 \| good	0.324 \| good
2026-01-24T06:00:00.000Z	58 \| moderate	13.243 \| fine	59.512 \| fine	17.299 \| good	2.618 \| good	21.772 \| good	0.337 \| good
2026-01-24T07:00:00.000Z	56 \| moderate	12.307 \| fine	55.455 \| fine	15.873 \| good	2.459 \| good	20.937 \| good	0.333 \| good
2026-01-24T08:00:00.000Z	52 \| moderate	10.04 \| good	44.804 \| good	15.889 \| good	2.299 \| good	20.101 \| good	0.33 \| good
2026-01-24T09:00:00.000Z	52 \| moderate	9.853 \| good	43.778 \| good	13.316 \| good	2.14 \| good	19.266 \| good	0.326 \| good
2026-01-24T10:00:00.000Z	44 \| good	8.347 \| good	36.388 \| good	11.807 \| good	2.129 \| good	19.377 \| good	0.325 \| good
2026-01-24T11:00:00.000Z	52 \| moderate	9.511 \| good	42.038 \| good	10.793 \| good	2.118 \| good	19.488 \| good	0.324 \| good
2026-01-24T12:00:00.000Z	54 \| moderate	10.815 \| good	47.769 \| good	7.671 \| good	2.108 \| good	19.599 \| good	0.323 \| good
2026-01-24T13:00:00.000Z	58 \| moderate	12.52 \| fine	55.619 \| fine	6.445 \| good	2.277 \| good	20.338 \| good	0.312 \| good
2026-01-24T14:00:00.000Z	58 \| moderate	13.086 \| fine	58.663 \| fine	3.919 \| good	2.446 \| good	21.076 \| good	0.302 \| good
2026-01-24T15:00:00.000Z	66 \| moderate	17.009 \| fine	75.019 \| fine	3.059 \| good	2.615 \| good	21.815 \| good	0.292 \| good
2026-01-24T16:00:00.000Z	64 \| moderate	16.13 \| fine	71.18 \| fine	7.452 \| good	2.41 \| good	19.643 \| good	0.28 \| good
2026-01-24T17:00:00.000Z	66 \| moderate	16.617 \| fine	73.382 \| fine	14.416 \| good	2.206 \| good	17.471 \| good	0.268 \| good
2026-01-24T18:00:00.000Z	58 \| moderate	13.369 \| fine	60.427 \| fine	20.248 \| good	2.002 \| good	15.299 \| good	0.255 \| good
2026-01-24T19:00:00.000Z	56 \| moderate	12.405 \| fine	55.06 \| fine	21.322 \| good	1.708 \| good	11.956 \| good	0.221 \| good
2026-01-24T20:00:00.000Z	49 \| good	8.716 \| good	38.021 \| good	24.037 \| good	1.415 \| good	8.613 \| good	0.186 \| good
2026-01-24T21:00:00.000Z	33 \| good	5.844 \| good	26.323 \| good	26.552 \| good	1.121 \| good	5.27 \| good	0.151 \| good
2026-01-24T22:00:00.000Z	27 \| good	2.757 \| good	11.664 \| good	28.691 \| good	1.125 \| good	5.958 \| good	0.151 \| good
2026-01-24T23:00:00.000Z	26 \| good	2.093 \| good	8.543 \| good	28.219 \| good	1.13 \| good	6.647 \| good	0.152 \| good
2026-01-25T00:00:00.000Z	25 \| good	2.259 \| good	9.47 \| good	27.077 \| good	1.134 \| good	7.335 \| good	0.153 \| good
2026-01-25T01:00:00.000Z	19 \| good	1.655 \| good	6.71 \| good	19.668 \| good	1.28 \| good	13.876 \| good	0.188 \| good
2026-01-25T02:00:00.000Z	22 \| good	3.836 \| good	16.927 \| good	13.793 \| good	1.426 \| good	20.416 \| good	0.222 \| good
2026-01-25T03:00:00.000Z	27 \| good	5.016 \| good	21.755 \| good	10.124 \| good	1.572 \| good	26.956 \| good	0.257 \| good
2026-01-25T04:00:00.000Z	33 \| good	5.687 \| good	24.519 \| good	7.835 \| good	1.65 \| good	28.248 \| good	0.268 \| good
2026-01-25T05:00:00.000Z	38 \| good	6.632 \| good	29.142 \| good	8.041 \| good	1.729 \| good	29.539 \| good	0.278 \| good
2026-01-25T06:00:00.000Z	33 \| good	5.598 \| good	24.324 \| good	8.623 \| good	1.808 \| good	30.831 \| good	0.289 \| good
2026-01-25T07:00:00.000Z	33 \| good	5.664 \| good	24.394 \| good	7.389 \| good	1.615 \| good	29.9 \| good	0.286 \| good
2026-01-25T08:00:00.000Z	38 \| good	6.514 \| good	28.989 \| good	7.14 \| good	1.423 \| good	28.968 \| good	0.283 \| good
2026-01-25T09:00:00.000Z	44 \| good	7.999 \| good	35.111 \| good	6.062 \| good	1.231 \| good	28.037 \| good	0.28 \| good
2026-01-25T10:00:00.000Z	44 \| good	7.765 \| good	34.059 \| good	5.075 \| good	1.124 \| good	26.629 \| good	0.27 \| good
2026-01-25T11:00:00.000Z	52 \| moderate	9.528 \| good	42.451 \| good	6.027 \| good	1.017 \| good	25.221 \| good	0.26 \| good
2026-01-25T12:00:00.000Z	44 \| good	8.358 \| good	36.82 \| good	5.776 \| good	0.91 \| good	23.812 \| good	0.25 \| good
2026-01-25T13:00:00.000Z	38 \| good	7.46 \| good	32.605 \| good	5.961 \| good	0.984 \| good	23.354 \| good	0.245 \| good
2026-01-25T14:00:00.000Z	27 \| good	5.137 \| good	22.317 \| good	5.984 \| good	1.058 \| good	22.896 \| good	0.24 \| good
2026-01-25T15:00:00.000Z	27 \| good	5.389 \| good	23.388 \| good	5.847 \| good	1.133 \| good	22.437 \| good	0.235 \| good
2026-01-25T16:00:00.000Z	33 \| good	5.943 \| good	26.055 \| good	6.683 \| good	1.248 \| good	20.821 \| good	0.249 \| good
2026-01-25T17:00:00.000Z	54 \| moderate	10.774 \| good	47.797 \| good	10.084 \| good	1.363 \| good	19.205 \| good	0.263 \| good
2026-01-25T18:00:00.000Z	52 \| moderate	10.092 \| good	44.495 \| good	13.904 \| good	1.478 \| good	17.589 \| good	0.278 \| good
2026-01-25T19:00:00.000Z	52 \| moderate	10.352 \| good	46.128 \| good	16.312 \| good	1.584 \| good	15.951 \| good	0.259 \| good
2026-01-25T20:00:00.000Z	52 \| moderate	10.191 \| good	45.004 \| good	18.23 \| good	1.69 \| good	14.313 \| good	0.241 \| good

Real-time air quality index in Foster City, California today

Common air pollutants in Foster City, California

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Foster City, California air quality forecast and history

Empower business decisions with accurate air quality data

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

Air quality in nearby cities

Belmont, California

San Mateo, California

San Carlos, California

Burlingame, California

Redwood City, California

Hillsborough, 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 Foster City, California updated?

When did Foster City, California experience the worst air quality in the last 24 hours?

When did Foster City, California have its best air quality in the last 24 hours?

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

Which pollutant is found most often in Foster City, California?

What can I do if the air quality in Foster City, California is poor?

What are the current PM2.5 levels in Foster City, California?

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

What are the current carbon monoxide (CO) levels at Foster City, California?

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

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

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

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

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

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

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