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

The current PM10 levels in Foster City, California are 34.215 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 0.452 ppb.

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

The current ozone (O3) levels at Foster City, California is 5.829 ppm.

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

The current nitrogen dioxide (NO2) levels at Foster City, California is 9.594 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 10.325 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)

10.32 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

34.22 μg/m³

155

255

425

605+

Ozone (O₃)

5.83 ppb

201

201+

Sulfur Dioxide (SO₂)

0.45 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

9.59 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.33 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
2025-12-05T15:00:00.000Z	56 \| moderate	12.468 \| fine	50.135 \| good	6.351 \| good	0.455 \| good	19.703 \| good	0.615 \| good
2025-12-05T16:00:00.000Z	56 \| moderate	12.323 \| fine	45.957 \| good	5.487 \| good	0.438 \| good	15.389 \| good	0.81 \| good
2025-12-05T17:00:00.000Z	64 \| moderate	16.404 \| fine	71.346 \| fine	5.575 \| good	0.419 \| good	15.004 \| good	0.755 \| good
2025-12-05T18:00:00.000Z	62 \| moderate	15.393 \| fine	60.739 \| fine	10.778 \| good	0.464 \| good	11.911 \| good	0.607 \| good
2025-12-05T19:00:00.000Z	66 \| moderate	17.207 \| fine	71.549 \| fine	10.688 \| good	0.484 \| good	11.23 \| good	0.428 \| good
2025-12-05T20:00:00.000Z	69 \| moderate	19.026 \| fine	46.858 \| good	12.843 \| good	0.434 \| good	11.497 \| good	0.342 \| good
2025-12-05T21:00:00.000Z	67 \| moderate	18.162 \| fine	27.122 \| good	13.246 \| good	0.411 \| good	10.06 \| good	0.328 \| good
2025-12-05T22:00:00.000Z	66 \| moderate	16.771 \| fine	41.297 \| good	14.676 \| good	0.533 \| good	11 \| good	0.27 \| good
2025-12-05T23:00:00.000Z	73 \| moderate	20.881 \| fine	43.581 \| good	13.259 \| good	0.499 \| good	8.376 \| good	0.274 \| good
2025-12-06T00:00:00.000Z	64 \| moderate	16.213 \| fine	79.249 \| fine	12.999 \| good	0.485 \| good	11.164 \| good	0.256 \| good
2025-12-06T01:00:00.000Z	66 \| moderate	16.687 \| fine	74.624 \| fine	15.116 \| good	0.441 \| good	12.38 \| good	0.26 \| good
2025-12-06T02:00:00.000Z	67 \| moderate	18.219 \| fine	69.407 \| fine	12.789 \| good	0.369 \| good	14.866 \| good	0.306 \| good
2025-12-06T03:00:00.000Z	67 \| moderate	18.264 \| fine	76.721 \| fine	9.994 \| good	0.337 \| good	16.48 \| good	0.404 \| good
2025-12-06T04:00:00.000Z	69 \| moderate	19.494 \| fine	76.884 \| fine	10.957 \| good	0.35 \| good	16.035 \| good	0.479 \| good
2025-12-06T05:00:00.000Z	67 \| moderate	17.359 \| fine	88.212 \| fine	14.344 \| good	0.433 \| good	14.904 \| good	0.48 \| good
2025-12-06T06:00:00.000Z	66 \| moderate	16.583 \| fine	81.024 \| fine	12.833 \| good	0.399 \| good	11.799 \| good	0.541 \| good
2025-12-06T07:00:00.000Z	71 \| moderate	19.696 \| fine	75.612 \| fine	13.8 \| good	0.415 \| good	13.895 \| good	0.512 \| good
2025-12-06T08:00:00.000Z	71 \| moderate	19.891 \| fine	48.533 \| good	13.656 \| good	0.384 \| good	12.246 \| good	0.375 \| good
2025-12-06T09:00:00.000Z	71 \| moderate	20.121 \| fine	71.67 \| fine	14.093 \| good	0.404 \| good	12.3 \| good	0.376 \| good
2025-12-06T10:00:00.000Z	75 \| moderate	21.682 \| fine	97.576 \| fine	10.242 \| good	0.932 \| good	11.181 \| good	0.43 \| good
2025-12-06T11:00:00.000Z	56 \| moderate	12.38 \| fine	52.997 \| good	4.873 \| good	0.86 \| good	7.401 \| good	0.382 \| good
2025-12-06T12:00:00.000Z	68 \| moderate	14.592 \| fine	88.617 \| fine	5.027 \| good	0.316 \| good	8.184 \| good	0.371 \| good
2025-12-06T13:00:00.000Z	60 \| moderate	14.182 \| fine	60.734 \| fine	6.109 \| good	0.365 \| good	11.484 \| good	0.303 \| good
2025-12-06T14:00:00.000Z	58 \| moderate	13.436 \| fine	36.202 \| good	5.298 \| good	0.523 \| good	10.995 \| good	0.205 \| good
2025-12-06T15:00:00.000Z	64 \| moderate	15.661 \| fine	54.967 \| good	6.872 \| good	0.406 \| good	9.291 \| good	0.262 \| good
2025-12-06T16:00:00.000Z	64 \| moderate	15.652 \| fine	75.251 \| fine	3.9 \| good	0.373 \| good	7.952 \| good	0.294 \| good
2025-12-06T17:00:00.000Z	64 \| moderate	16.277 \| fine	72.902 \| fine	6.226 \| good	0.426 \| good	7.081 \| good	0.259 \| good
2025-12-06T18:00:00.000Z	64 \| moderate	16.33 \| fine	57.323 \| fine	8.067 \| good	0.516 \| good	6.653 \| good	0.297 \| good
2025-12-06T19:00:00.000Z	73 \| moderate	21.237 \| fine	96.446 \| fine	8.549 \| good	0.578 \| good	5.602 \| good	0.35 \| good
2025-12-06T20:00:00.000Z	73 \| moderate	21.275 \| fine	71.757 \| fine	8.831 \| good	0.558 \| good	6.521 \| good	0.332 \| good
2025-12-06T21:00:00.000Z	75 \| moderate	21.828 \| fine	51.58 \| good	9.852 \| good	0.572 \| good	7.384 \| good	0.351 \| good
2025-12-06T22:00:00.000Z	75 \| moderate	22.159 \| fine	93.756 \| fine	10.986 \| good	0.579 \| good	7.31 \| good	0.332 \| good
2025-12-06T23:00:00.000Z	71 \| moderate	19.539 \| fine	65.879 \| fine	10.278 \| good	0.493 \| good	6.905 \| good	0.298 \| good
2025-12-07T00:00:00.000Z	66 \| moderate	16.528 \| fine	73.694 \| fine	12.283 \| good	0.514 \| good	7.328 \| good	0.298 \| good
2025-12-07T01:00:00.000Z	64 \| moderate	15.7 \| fine	69.21 \| fine	13.064 \| good	0.444 \| good	9.51 \| good	0.319 \| good
2025-12-07T02:00:00.000Z	69 \| moderate	19.074 \| fine	58.927 \| fine	11.453 \| good	0.39 \| good	9.986 \| good	0.353 \| good
2025-12-07T03:00:00.000Z	60 \| moderate	14.079 \| fine	41.872 \| good	8.985 \| good	0.329 \| good	12.144 \| good	0.379 \| good
2025-12-07T04:00:00.000Z	56 \| moderate	11.955 \| good	32.778 \| good	13.396 \| good	0.318 \| good	12.044 \| good	0.502 \| good
2025-12-07T05:00:00.000Z	60 \| moderate	14.079 \| fine	24.015 \| good	9.842 \| good	0.278 \| good	10.168 \| good	0.545 \| good
2025-12-07T06:00:00.000Z	56 \| moderate	11.946 \| good	47.771 \| good	6.505 \| good	0.269 \| good	8.972 \| good	0.545 \| good
2025-12-07T07:00:00.000Z	67 \| moderate	18.365 \| fine	66.302 \| fine	8.163 \| good	0.269 \| good	9.184 \| good	0.53 \| good
2025-12-07T08:00:00.000Z	64 \| moderate	16.272 \| fine	68.538 \| fine	6.329 \| good	0.273 \| good	9.243 \| good	0.559 \| good
2025-12-07T09:00:00.000Z	66 \| moderate	17.094 \| fine	68.09 \| fine	8.761 \| good	0.324 \| good	8.122 \| good	0.49 \| good
2025-12-07T10:00:00.000Z	77 \| moderate	22.59 \| fine	93.139 \| fine	8.236 \| good	0.476 \| good	4.145 \| good	0.267 \| good
2025-12-07T11:00:00.000Z	56 \| moderate	12.11 \| fine	39.242 \| good	9.659 \| good	0.504 \| good	3.408 \| good	0.256 \| good
2025-12-07T12:00:00.000Z	64 \| moderate	16.192 \| fine	61.364 \| fine	5.154 \| good	0.338 \| good	7.356 \| good	0.22 \| good
2025-12-07T13:00:00.000Z	71 \| moderate	19.52 \| fine	84.237 \| fine	7.911 \| good	0.362 \| good	11.667 \| good	0.308 \| good
2025-12-07T14:00:00.000Z	58 \| moderate	12.552 \| fine	48.986 \| good	8.509 \| good	0.445 \| good	10.965 \| good	0.45 \| good
2025-12-07T14:00:00.000Z	52 \| moderate	10.325 \| good	34.215 \| good	5.829 \| good	0.452 \| good	9.594 \| good	0.334 \| good
2025-12-07T15:00:00.000Z	62 \| moderate	14.897 \| fine	66.909 \| fine	4.145 \| good	1.428 \| good	16.762 \| good	0.243 \| good
2025-12-07T16:00:00.000Z	62 \| moderate	14.731 \| fine	66.183 \| fine	5.247 \| good	1.595 \| good	15.638 \| good	0.248 \| good
2025-12-07T17:00:00.000Z	66 \| moderate	16.616 \| fine	73.807 \| fine	4.495 \| good	1.762 \| good	14.515 \| good	0.254 \| good
2025-12-07T18:00:00.000Z	71 \| moderate	19.633 \| fine	86.32 \| fine	4.336 \| good	1.929 \| good	13.392 \| good	0.259 \| good
2025-12-07T19:00:00.000Z	71 \| moderate	20.407 \| fine	90.225 \| fine	5.836 \| good	2.083 \| good	12.451 \| good	0.237 \| good
2025-12-07T20:00:00.000Z	71 \| moderate	20.141 \| fine	88.984 \| fine	6.196 \| good	2.236 \| good	11.51 \| good	0.215 \| good
2025-12-07T21:00:00.000Z	67 \| moderate	18.335 \| fine	80.753 \| fine	6.598 \| good	2.39 \| good	10.569 \| good	0.193 \| good
2025-12-07T22:00:00.000Z	62 \| moderate	15.196 \| fine	67.499 \| fine	8.52 \| good	2.24 \| good	11.478 \| good	0.186 \| good
2025-12-07T23:00:00.000Z	58 \| moderate	13.272 \| fine	59.287 \| fine	10.168 \| good	2.09 \| good	12.387 \| good	0.18 \| good
2025-12-08T00:00:00.000Z	54 \| moderate	11.151 \| good	49.734 \| good	11.23 \| good	1.94 \| good	13.296 \| good	0.174 \| good
2025-12-08T01:00:00.000Z	44 \| good	8.152 \| good	36.017 \| good	9.674 \| good	1.846 \| good	14.261 \| good	0.197 \| good
2025-12-08T02:00:00.000Z	38 \| good	7.442 \| good	32.914 \| good	7.5 \| good	1.753 \| good	15.226 \| good	0.221 \| good
2025-12-08T03:00:00.000Z	44 \| good	7.872 \| good	34.6 \| good	6.453 \| good	1.659 \| good	16.192 \| good	0.244 \| good
2025-12-08T04:00:00.000Z	33 \| good	6.445 \| good	28.384 \| good	5.649 \| good	1.771 \| good	16.052 \| good	0.25 \| good
2025-12-08T05:00:00.000Z	27 \| good	5.391 \| good	23.645 \| good	5.249 \| good	1.882 \| good	15.911 \| good	0.256 \| good
2025-12-08T06:00:00.000Z	16 \| good	3.498 \| good	14.979 \| good	3.475 \| good	1.994 \| good	15.771 \| good	0.262 \| good
2025-12-08T07:00:00.000Z	27 \| good	4.897 \| good	21.536 \| good	1.441 \| good	1.92 \| good	15.672 \| good	0.261 \| good
2025-12-08T08:00:00.000Z	49 \| good	8.526 \| good	37.804 \| good	2.284 \| good	1.846 \| good	15.573 \| good	0.26 \| good
2025-12-08T09:00:00.000Z	58 \| moderate	12.567 \| fine	55.956 \| fine	1.85 \| good	1.772 \| good	15.474 \| good	0.259 \| good
2025-12-08T10:00:00.000Z	58 \| moderate	12.96 \| fine	58.351 \| fine	1.537 \| good	1.7 \| good	14.92 \| good	0.256 \| good
2025-12-08T11:00:00.000Z	60 \| moderate	14.399 \| fine	64.248 \| fine	1.365 \| good	1.629 \| good	14.367 \| good	0.252 \| good
2025-12-08T12:00:00.000Z	64 \| moderate	16.252 \| fine	72.615 \| fine	1.441 \| good	1.557 \| good	13.813 \| good	0.249 \| good
2025-12-08T13:00:00.000Z	66 \| moderate	16.82 \| fine	75.046 \| fine	1.648 \| good	1.692 \| good	13.567 \| good	0.256 \| good
2025-12-08T14:00:00.000Z	67 \| moderate	18.473 \| fine	82.352 \| fine	1.001 \| good	1.827 \| good	13.321 \| good	0.263 \| good
2025-12-08T15:00:00.000Z	66 \| moderate	16.995 \| fine	74.982 \| fine	2.234 \| good	1.962 \| good	13.075 \| good	0.271 \| good
2025-12-08T16:00:00.000Z	67 \| moderate	17.696 \| fine	78.982 \| fine	5.035 \| good	2.553 \| good	13.368 \| good	0.262 \| good
2025-12-08T17:00:00.000Z	67 \| moderate	17.952 \| fine	79.151 \| fine	7.066 \| good	3.143 \| good	13.661 \| good	0.254 \| good
2025-12-08T18:00:00.000Z	73 \| moderate	21.126 \| fine	92.968 \| fine	6.148 \| good	3.734 \| good	13.953 \| good	0.246 \| good
2025-12-08T19:00:00.000Z	77 \| moderate	23.409 \| fine	102.44 \| fine	6.515 \| good	3.51 \| good	12.485 \| good	0.221 \| good
2025-12-08T20:00:00.000Z	81 \| moderate	25.295 \| fine	109.686 \| fine	6.328 \| good	3.285 \| good	11.016 \| good	0.196 \| good
2025-12-08T21:00:00.000Z	84 \| moderate	27.27 \| fine	118.773 \| fine	4.759 \| good	3.061 \| good	9.548 \| good	0.171 \| good
2025-12-08T22:00:00.000Z	81 \| moderate	25.066 \| fine	109.644 \| fine	4.672 \| good	2.743 \| good	9.883 \| good	0.167 \| good
2025-12-08T23:00:00.000Z	71 \| moderate	20.377 \| fine	90.092 \| fine	4.116 \| good	2.425 \| good	10.218 \| good	0.163 \| good
2025-12-09T00:00:00.000Z	58 \| moderate	13.399 \| fine	60.066 \| fine	8.357 \| good	2.108 \| good	10.554 \| good	0.159 \| good
2025-12-09T01:00:00.000Z	54 \| moderate	11.174 \| good	49.482 \| good	10.165 \| good	1.918 \| good	12.189 \| good	0.185 \| good
2025-12-09T02:00:00.000Z	49 \| good	9.024 \| good	39.913 \| good	8.766 \| good	1.728 \| good	13.825 \| good	0.212 \| good
2025-12-09T03:00:00.000Z	49 \| good	8.546 \| good	38.016 \| good	6.146 \| good	1.539 \| good	15.46 \| good	0.238 \| good
2025-12-09T04:00:00.000Z	38 \| good	7.369 \| good	32.911 \| good	4.102 \| good	1.599 \| good	14.442 \| good	0.243 \| good
2025-12-09T05:00:00.000Z	38 \| good	6.852 \| good	30.13 \| good	3.574 \| good	1.659 \| good	13.424 \| good	0.248 \| good
2025-12-09T06:00:00.000Z	27 \| good	5.238 \| good	22.976 \| good	4.249 \| good	1.72 \| good	12.405 \| good	0.253 \| good
2025-12-09T07:00:00.000Z	22 \| good	4.037 \| good	17.182 \| good	4.174 \| good	1.64 \| good	11.895 \| good	0.253 \| good
2025-12-09T08:00:00.000Z	22 \| good	3.847 \| good	16.543 \| good	3.252 \| good	1.56 \| good	11.384 \| good	0.253 \| good
2025-12-09T09:00:00.000Z	44 \| good	7.531 \| good	33.636 \| good	2.435 \| good	1.481 \| good	10.873 \| good	0.253 \| good
2025-12-09T10:00:00.000Z	52 \| moderate	9.745 \| good	42.86 \| good	1.609 \| good	1.368 \| good	10.267 \| good	0.244 \| good
2025-12-09T11:00:00.000Z	52 \| moderate	10.405 \| good	45.91 \| good	1.063 \| good	1.255 \| good	9.662 \| good	0.235 \| good
2025-12-09T12:00:00.000Z	56 \| moderate	11.757 \| good	52.346 \| good	0.572 \| good	1.142 \| good	9.056 \| good	0.226 \| good
2025-12-09T13:00:00.000Z	56 \| moderate	11.931 \| good	52.915 \| good	0.353 \| good	1.227 \| good	9.377 \| good	0.226 \| good
2025-12-09T14:00:00.000Z	60 \| moderate	14.067 \| fine	63.179 \| fine	0.231 \| good	1.312 \| good	9.699 \| good	0.226 \| good

Foster City

Empower business decisions with accurate air quality data

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

0.31ppm

How accurate is California, USA air quality data?

Air quality measurements for California, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.

Source: Ambee Data Sources

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Check live rankings of places in the USA affected by air pollution.

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Frequently asked questions

How frequently is the air quality data for 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 10:00:00 on 2025-12-07.

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 11:00:00 on 2025-12-07.

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

The real-time air quality index in Foster City, California is 52, 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 10.325 μg/m³.

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

The current PM₁₀ levels in Foster City, California are 34.215 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 0.334 ppm.

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

The current sulfur dioxide (SO₂) levels in Foster City, California are 0.452 ppb.

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

The current ozone (O₃) levels at Foster City, California is 5.829 ppm.

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

The current nitrogen dioxide (NO₂) levels at Foster City, California is 9.594 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-05T15:00:00.000Z	56 \| moderate	12.468 \| fine	50.135 \| good	6.351 \| good	0.455 \| good	19.703 \| good	0.615 \| good
2025-12-05T16:00:00.000Z	56 \| moderate	12.323 \| fine	45.957 \| good	5.487 \| good	0.438 \| good	15.389 \| good	0.81 \| good
2025-12-05T17:00:00.000Z	64 \| moderate	16.404 \| fine	71.346 \| fine	5.575 \| good	0.419 \| good	15.004 \| good	0.755 \| good
2025-12-05T18:00:00.000Z	62 \| moderate	15.393 \| fine	60.739 \| fine	10.778 \| good	0.464 \| good	11.911 \| good	0.607 \| good
2025-12-05T19:00:00.000Z	66 \| moderate	17.207 \| fine	71.549 \| fine	10.688 \| good	0.484 \| good	11.23 \| good	0.428 \| good
2025-12-05T20:00:00.000Z	69 \| moderate	19.026 \| fine	46.858 \| good	12.843 \| good	0.434 \| good	11.497 \| good	0.342 \| good
2025-12-05T21:00:00.000Z	67 \| moderate	18.162 \| fine	27.122 \| good	13.246 \| good	0.411 \| good	10.06 \| good	0.328 \| good
2025-12-05T22:00:00.000Z	66 \| moderate	16.771 \| fine	41.297 \| good	14.676 \| good	0.533 \| good	11 \| good	0.27 \| good
2025-12-05T23:00:00.000Z	73 \| moderate	20.881 \| fine	43.581 \| good	13.259 \| good	0.499 \| good	8.376 \| good	0.274 \| good
2025-12-06T00:00:00.000Z	64 \| moderate	16.213 \| fine	79.249 \| fine	12.999 \| good	0.485 \| good	11.164 \| good	0.256 \| good
2025-12-06T01:00:00.000Z	66 \| moderate	16.687 \| fine	74.624 \| fine	15.116 \| good	0.441 \| good	12.38 \| good	0.26 \| good
2025-12-06T02:00:00.000Z	67 \| moderate	18.219 \| fine	69.407 \| fine	12.789 \| good	0.369 \| good	14.866 \| good	0.306 \| good
2025-12-06T03:00:00.000Z	67 \| moderate	18.264 \| fine	76.721 \| fine	9.994 \| good	0.337 \| good	16.48 \| good	0.404 \| good
2025-12-06T04:00:00.000Z	69 \| moderate	19.494 \| fine	76.884 \| fine	10.957 \| good	0.35 \| good	16.035 \| good	0.479 \| good
2025-12-06T05:00:00.000Z	67 \| moderate	17.359 \| fine	88.212 \| fine	14.344 \| good	0.433 \| good	14.904 \| good	0.48 \| good
2025-12-06T06:00:00.000Z	66 \| moderate	16.583 \| fine	81.024 \| fine	12.833 \| good	0.399 \| good	11.799 \| good	0.541 \| good
2025-12-06T07:00:00.000Z	71 \| moderate	19.696 \| fine	75.612 \| fine	13.8 \| good	0.415 \| good	13.895 \| good	0.512 \| good
2025-12-06T08:00:00.000Z	71 \| moderate	19.891 \| fine	48.533 \| good	13.656 \| good	0.384 \| good	12.246 \| good	0.375 \| good
2025-12-06T09:00:00.000Z	71 \| moderate	20.121 \| fine	71.67 \| fine	14.093 \| good	0.404 \| good	12.3 \| good	0.376 \| good
2025-12-06T10:00:00.000Z	75 \| moderate	21.682 \| fine	97.576 \| fine	10.242 \| good	0.932 \| good	11.181 \| good	0.43 \| good
2025-12-06T11:00:00.000Z	56 \| moderate	12.38 \| fine	52.997 \| good	4.873 \| good	0.86 \| good	7.401 \| good	0.382 \| good
2025-12-06T12:00:00.000Z	68 \| moderate	14.592 \| fine	88.617 \| fine	5.027 \| good	0.316 \| good	8.184 \| good	0.371 \| good
2025-12-06T13:00:00.000Z	60 \| moderate	14.182 \| fine	60.734 \| fine	6.109 \| good	0.365 \| good	11.484 \| good	0.303 \| good
2025-12-06T14:00:00.000Z	58 \| moderate	13.436 \| fine	36.202 \| good	5.298 \| good	0.523 \| good	10.995 \| good	0.205 \| good
2025-12-06T15:00:00.000Z	64 \| moderate	15.661 \| fine	54.967 \| good	6.872 \| good	0.406 \| good	9.291 \| good	0.262 \| good
2025-12-06T16:00:00.000Z	64 \| moderate	15.652 \| fine	75.251 \| fine	3.9 \| good	0.373 \| good	7.952 \| good	0.294 \| good
2025-12-06T17:00:00.000Z	64 \| moderate	16.277 \| fine	72.902 \| fine	6.226 \| good	0.426 \| good	7.081 \| good	0.259 \| good
2025-12-06T18:00:00.000Z	64 \| moderate	16.33 \| fine	57.323 \| fine	8.067 \| good	0.516 \| good	6.653 \| good	0.297 \| good
2025-12-06T19:00:00.000Z	73 \| moderate	21.237 \| fine	96.446 \| fine	8.549 \| good	0.578 \| good	5.602 \| good	0.35 \| good
2025-12-06T20:00:00.000Z	73 \| moderate	21.275 \| fine	71.757 \| fine	8.831 \| good	0.558 \| good	6.521 \| good	0.332 \| good
2025-12-06T21:00:00.000Z	75 \| moderate	21.828 \| fine	51.58 \| good	9.852 \| good	0.572 \| good	7.384 \| good	0.351 \| good
2025-12-06T22:00:00.000Z	75 \| moderate	22.159 \| fine	93.756 \| fine	10.986 \| good	0.579 \| good	7.31 \| good	0.332 \| good
2025-12-06T23:00:00.000Z	71 \| moderate	19.539 \| fine	65.879 \| fine	10.278 \| good	0.493 \| good	6.905 \| good	0.298 \| good
2025-12-07T00:00:00.000Z	66 \| moderate	16.528 \| fine	73.694 \| fine	12.283 \| good	0.514 \| good	7.328 \| good	0.298 \| good
2025-12-07T01:00:00.000Z	64 \| moderate	15.7 \| fine	69.21 \| fine	13.064 \| good	0.444 \| good	9.51 \| good	0.319 \| good
2025-12-07T02:00:00.000Z	69 \| moderate	19.074 \| fine	58.927 \| fine	11.453 \| good	0.39 \| good	9.986 \| good	0.353 \| good
2025-12-07T03:00:00.000Z	60 \| moderate	14.079 \| fine	41.872 \| good	8.985 \| good	0.329 \| good	12.144 \| good	0.379 \| good
2025-12-07T04:00:00.000Z	56 \| moderate	11.955 \| good	32.778 \| good	13.396 \| good	0.318 \| good	12.044 \| good	0.502 \| good
2025-12-07T05:00:00.000Z	60 \| moderate	14.079 \| fine	24.015 \| good	9.842 \| good	0.278 \| good	10.168 \| good	0.545 \| good
2025-12-07T06:00:00.000Z	56 \| moderate	11.946 \| good	47.771 \| good	6.505 \| good	0.269 \| good	8.972 \| good	0.545 \| good
2025-12-07T07:00:00.000Z	67 \| moderate	18.365 \| fine	66.302 \| fine	8.163 \| good	0.269 \| good	9.184 \| good	0.53 \| good
2025-12-07T08:00:00.000Z	64 \| moderate	16.272 \| fine	68.538 \| fine	6.329 \| good	0.273 \| good	9.243 \| good	0.559 \| good
2025-12-07T09:00:00.000Z	66 \| moderate	17.094 \| fine	68.09 \| fine	8.761 \| good	0.324 \| good	8.122 \| good	0.49 \| good
2025-12-07T10:00:00.000Z	77 \| moderate	22.59 \| fine	93.139 \| fine	8.236 \| good	0.476 \| good	4.145 \| good	0.267 \| good
2025-12-07T11:00:00.000Z	56 \| moderate	12.11 \| fine	39.242 \| good	9.659 \| good	0.504 \| good	3.408 \| good	0.256 \| good
2025-12-07T12:00:00.000Z	64 \| moderate	16.192 \| fine	61.364 \| fine	5.154 \| good	0.338 \| good	7.356 \| good	0.22 \| good
2025-12-07T13:00:00.000Z	71 \| moderate	19.52 \| fine	84.237 \| fine	7.911 \| good	0.362 \| good	11.667 \| good	0.308 \| good
2025-12-07T14:00:00.000Z	58 \| moderate	12.552 \| fine	48.986 \| good	8.509 \| good	0.445 \| good	10.965 \| good	0.45 \| good
2025-12-07T14:00:00.000Z	52 \| moderate	10.325 \| good	34.215 \| good	5.829 \| good	0.452 \| good	9.594 \| good	0.334 \| good
2025-12-07T15:00:00.000Z	62 \| moderate	14.897 \| fine	66.909 \| fine	4.145 \| good	1.428 \| good	16.762 \| good	0.243 \| good
2025-12-07T16:00:00.000Z	62 \| moderate	14.731 \| fine	66.183 \| fine	5.247 \| good	1.595 \| good	15.638 \| good	0.248 \| good
2025-12-07T17:00:00.000Z	66 \| moderate	16.616 \| fine	73.807 \| fine	4.495 \| good	1.762 \| good	14.515 \| good	0.254 \| good
2025-12-07T18:00:00.000Z	71 \| moderate	19.633 \| fine	86.32 \| fine	4.336 \| good	1.929 \| good	13.392 \| good	0.259 \| good
2025-12-07T19:00:00.000Z	71 \| moderate	20.407 \| fine	90.225 \| fine	5.836 \| good	2.083 \| good	12.451 \| good	0.237 \| good
2025-12-07T20:00:00.000Z	71 \| moderate	20.141 \| fine	88.984 \| fine	6.196 \| good	2.236 \| good	11.51 \| good	0.215 \| good
2025-12-07T21:00:00.000Z	67 \| moderate	18.335 \| fine	80.753 \| fine	6.598 \| good	2.39 \| good	10.569 \| good	0.193 \| good
2025-12-07T22:00:00.000Z	62 \| moderate	15.196 \| fine	67.499 \| fine	8.52 \| good	2.24 \| good	11.478 \| good	0.186 \| good
2025-12-07T23:00:00.000Z	58 \| moderate	13.272 \| fine	59.287 \| fine	10.168 \| good	2.09 \| good	12.387 \| good	0.18 \| good
2025-12-08T00:00:00.000Z	54 \| moderate	11.151 \| good	49.734 \| good	11.23 \| good	1.94 \| good	13.296 \| good	0.174 \| good
2025-12-08T01:00:00.000Z	44 \| good	8.152 \| good	36.017 \| good	9.674 \| good	1.846 \| good	14.261 \| good	0.197 \| good
2025-12-08T02:00:00.000Z	38 \| good	7.442 \| good	32.914 \| good	7.5 \| good	1.753 \| good	15.226 \| good	0.221 \| good
2025-12-08T03:00:00.000Z	44 \| good	7.872 \| good	34.6 \| good	6.453 \| good	1.659 \| good	16.192 \| good	0.244 \| good
2025-12-08T04:00:00.000Z	33 \| good	6.445 \| good	28.384 \| good	5.649 \| good	1.771 \| good	16.052 \| good	0.25 \| good
2025-12-08T05:00:00.000Z	27 \| good	5.391 \| good	23.645 \| good	5.249 \| good	1.882 \| good	15.911 \| good	0.256 \| good
2025-12-08T06:00:00.000Z	16 \| good	3.498 \| good	14.979 \| good	3.475 \| good	1.994 \| good	15.771 \| good	0.262 \| good
2025-12-08T07:00:00.000Z	27 \| good	4.897 \| good	21.536 \| good	1.441 \| good	1.92 \| good	15.672 \| good	0.261 \| good
2025-12-08T08:00:00.000Z	49 \| good	8.526 \| good	37.804 \| good	2.284 \| good	1.846 \| good	15.573 \| good	0.26 \| good
2025-12-08T09:00:00.000Z	58 \| moderate	12.567 \| fine	55.956 \| fine	1.85 \| good	1.772 \| good	15.474 \| good	0.259 \| good
2025-12-08T10:00:00.000Z	58 \| moderate	12.96 \| fine	58.351 \| fine	1.537 \| good	1.7 \| good	14.92 \| good	0.256 \| good
2025-12-08T11:00:00.000Z	60 \| moderate	14.399 \| fine	64.248 \| fine	1.365 \| good	1.629 \| good	14.367 \| good	0.252 \| good
2025-12-08T12:00:00.000Z	64 \| moderate	16.252 \| fine	72.615 \| fine	1.441 \| good	1.557 \| good	13.813 \| good	0.249 \| good
2025-12-08T13:00:00.000Z	66 \| moderate	16.82 \| fine	75.046 \| fine	1.648 \| good	1.692 \| good	13.567 \| good	0.256 \| good
2025-12-08T14:00:00.000Z	67 \| moderate	18.473 \| fine	82.352 \| fine	1.001 \| good	1.827 \| good	13.321 \| good	0.263 \| good
2025-12-08T15:00:00.000Z	66 \| moderate	16.995 \| fine	74.982 \| fine	2.234 \| good	1.962 \| good	13.075 \| good	0.271 \| good
2025-12-08T16:00:00.000Z	67 \| moderate	17.696 \| fine	78.982 \| fine	5.035 \| good	2.553 \| good	13.368 \| good	0.262 \| good
2025-12-08T17:00:00.000Z	67 \| moderate	17.952 \| fine	79.151 \| fine	7.066 \| good	3.143 \| good	13.661 \| good	0.254 \| good
2025-12-08T18:00:00.000Z	73 \| moderate	21.126 \| fine	92.968 \| fine	6.148 \| good	3.734 \| good	13.953 \| good	0.246 \| good
2025-12-08T19:00:00.000Z	77 \| moderate	23.409 \| fine	102.44 \| fine	6.515 \| good	3.51 \| good	12.485 \| good	0.221 \| good
2025-12-08T20:00:00.000Z	81 \| moderate	25.295 \| fine	109.686 \| fine	6.328 \| good	3.285 \| good	11.016 \| good	0.196 \| good
2025-12-08T21:00:00.000Z	84 \| moderate	27.27 \| fine	118.773 \| fine	4.759 \| good	3.061 \| good	9.548 \| good	0.171 \| good
2025-12-08T22:00:00.000Z	81 \| moderate	25.066 \| fine	109.644 \| fine	4.672 \| good	2.743 \| good	9.883 \| good	0.167 \| good
2025-12-08T23:00:00.000Z	71 \| moderate	20.377 \| fine	90.092 \| fine	4.116 \| good	2.425 \| good	10.218 \| good	0.163 \| good
2025-12-09T00:00:00.000Z	58 \| moderate	13.399 \| fine	60.066 \| fine	8.357 \| good	2.108 \| good	10.554 \| good	0.159 \| good
2025-12-09T01:00:00.000Z	54 \| moderate	11.174 \| good	49.482 \| good	10.165 \| good	1.918 \| good	12.189 \| good	0.185 \| good
2025-12-09T02:00:00.000Z	49 \| good	9.024 \| good	39.913 \| good	8.766 \| good	1.728 \| good	13.825 \| good	0.212 \| good
2025-12-09T03:00:00.000Z	49 \| good	8.546 \| good	38.016 \| good	6.146 \| good	1.539 \| good	15.46 \| good	0.238 \| good
2025-12-09T04:00:00.000Z	38 \| good	7.369 \| good	32.911 \| good	4.102 \| good	1.599 \| good	14.442 \| good	0.243 \| good
2025-12-09T05:00:00.000Z	38 \| good	6.852 \| good	30.13 \| good	3.574 \| good	1.659 \| good	13.424 \| good	0.248 \| good
2025-12-09T06:00:00.000Z	27 \| good	5.238 \| good	22.976 \| good	4.249 \| good	1.72 \| good	12.405 \| good	0.253 \| good
2025-12-09T07:00:00.000Z	22 \| good	4.037 \| good	17.182 \| good	4.174 \| good	1.64 \| good	11.895 \| good	0.253 \| good
2025-12-09T08:00:00.000Z	22 \| good	3.847 \| good	16.543 \| good	3.252 \| good	1.56 \| good	11.384 \| good	0.253 \| good
2025-12-09T09:00:00.000Z	44 \| good	7.531 \| good	33.636 \| good	2.435 \| good	1.481 \| good	10.873 \| good	0.253 \| good
2025-12-09T10:00:00.000Z	52 \| moderate	9.745 \| good	42.86 \| good	1.609 \| good	1.368 \| good	10.267 \| good	0.244 \| good
2025-12-09T11:00:00.000Z	52 \| moderate	10.405 \| good	45.91 \| good	1.063 \| good	1.255 \| good	9.662 \| good	0.235 \| good
2025-12-09T12:00:00.000Z	56 \| moderate	11.757 \| good	52.346 \| good	0.572 \| good	1.142 \| good	9.056 \| good	0.226 \| good
2025-12-09T13:00:00.000Z	56 \| moderate	11.931 \| good	52.915 \| good	0.353 \| good	1.227 \| good	9.377 \| good	0.226 \| good
2025-12-09T14:00:00.000Z	60 \| moderate	14.067 \| fine	63.179 \| fine	0.231 \| good	1.312 \| good	9.699 \| good	0.226 \| 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?