What is the sulfur dioxide (SO2) level in San Lorenzo, California at the moment?

Currently, San Lorenzo, California has a sulfur dioxide (SO2) concentration of 0.364 ppb.

What is the ozone (O3) level in San Lorenzo, California at the moment?

The current ozone (O3) level in San Lorenzo, California at the moment is 23.955 ppm.

What is the nitrogen dioxide (NO2) level in San Lorenzo, California at the moment?

Nitrogen dioxide (NO2) level in San Lorenzo, California at the moment is 1.765 ppb.

Live air quality index in San Lorenzo, California today

Q: What is the PM2.5 level in San Lorenzo, California at the moment?

PM2.5 levels in San Lorenzo, California are currently 3.456 μg/m3.

Q: What is the PM10 level in San Lorenzo, California at the moment?

The PM10 concentration in San Lorenzo, California is 14.573 μg/m3 at the moment.

Stay updated with real-time air quality in San Lorenzo, 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

San Lorenzo, California

Last updated: ... (Local time)

Major air pollutants in San Lorenzo, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

3.46 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

14.57 μg/m³

155

255

425

605+

Ozone (O₃)

23.95 ppb

201

201+

Sulfur Dioxide (SO₂)

0.36 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

1.76 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.23 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

San Lorenzo, California

Get Live Pollen Counts

San Lorenzo, California

Scroll To Air Quality Map

Track live San Lorenzo, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-09-19T10:00:00.000Z	38 \| good	6.942 \| good	27.153 \| good	26.903 \| good	0.481 \| good	3.503 \| good	0.127 \| good
2026-09-19T11:00:00.000Z	44 \| good	7.529 \| good	24.624 \| good	26.903 \| good	0.463 \| good	3.163 \| good	0.126 \| good
2026-09-19T12:00:00.000Z	38 \| good	7.295 \| good	31.905 \| good	27.226 \| good	0.35 \| good	7.546 \| good	0.175 \| good
2026-09-19T13:00:00.000Z	49 \| good	8.502 \| good	32.05 \| good	28.704 \| good	0.263 \| good	2.028 \| good	0.241 \| good
2026-09-19T14:00:00.000Z	44 \| good	7.893 \| good	35.685 \| good	28.653 \| good	0.415 \| good	2.818 \| good	0.231 \| good
2026-09-19T15:00:00.000Z	38 \| good	7.07 \| good	28.326 \| good	28.751 \| good	0.269 \| good	3.442 \| good	0.231 \| good
2026-09-19T16:00:00.000Z	38 \| good	7.106 \| good	30.06 \| good	28.699 \| good	0.288 \| good	2.964 \| good	0.231 \| good
2026-09-19T17:00:00.000Z	38 \| good	6.529 \| good	27.349 \| good	29.591 \| good	0.313 \| good	2.607 \| good	0.252 \| good
2026-09-19T18:00:00.000Z	44 \| good	7.923 \| good	29.837 \| good	28.739 \| good	0.349 \| good	2.299 \| good	0.252 \| good
2026-09-19T19:00:00.000Z	44 \| good	7.814 \| good	36.232 \| good	28.523 \| good	0.334 \| good	2.711 \| good	0.262 \| good
2026-09-19T20:00:00.000Z	49 \| good	8.967 \| good	43.088 \| good	28.845 \| good	0.513 \| good	2.654 \| good	0.27 \| good
2026-09-19T21:00:00.000Z	54 \| moderate	10.689 \| good	41.068 \| good	29.675 \| good	0.392 \| good	2.496 \| good	0.31 \| good
2026-09-19T22:00:00.000Z	49 \| good	8.78 \| good	35.054 \| good	30.363 \| good	0.367 \| good	3.457 \| good	0.308 \| good
2026-09-19T23:00:00.000Z	49 \| good	8.718 \| good	38.265 \| good	31.978 \| good	0.305 \| good	3.364 \| good	0.318 \| good
2026-09-20T00:00:00.000Z	54 \| moderate	10.801 \| good	39.551 \| good	32.486 \| good	0.264 \| good	4.512 \| good	0.302 \| good
2026-09-20T01:00:00.000Z	44 \| good	7.962 \| good	34.13 \| good	32.72 \| good	0.251 \| good	3.029 \| good	0.292 \| good
2026-09-20T02:00:00.000Z	49 \| good	8.511 \| good	44.149 \| good	30.621 \| good	0.233 \| good	2.547 \| good	0.302 \| good
2026-09-20T03:00:00.000Z	52 \| moderate	9.753 \| good	43.463 \| good	27.541 \| good	0.507 \| good	5.067 \| good	0.141 \| good
2026-09-20T04:00:00.000Z	38 \| good	7.339 \| good	32.421 \| good	28.632 \| good	0.338 \| good	4.025 \| good	0.31 \| good
2026-09-20T05:00:00.000Z	38 \| good	7.29 \| good	32.977 \| good	27.766 \| good	0.354 \| good	3.822 \| good	0.252 \| good
2026-09-20T06:00:00.000Z	33 \| good	6.08 \| good	27.126 \| good	27.268 \| good	0.456 \| good	3.251 \| good	0.262 \| good
2026-09-20T07:00:00.000Z	38 \| good	6.552 \| good	27.195 \| good	26.61 \| good	0.306 \| good	4.685 \| good	0.262 \| good
2026-09-20T08:00:00.000Z	33 \| good	6.468 \| good	28.1 \| good	27.432 \| good	0.47 \| good	4.655 \| good	0.262 \| good
2026-09-20T09:00:00.000Z	33 \| good	6.346 \| good	29.648 \| good	27.432 \| good	0.496 \| good	4.025 \| good	0.262 \| good
2026-09-20T10:00:00.000Z	38 \| good	6.801 \| good	29.698 \| good	27.314 \| good	0.657 \| good	6.554 \| good	0.139 \| good
2026-09-20T11:00:00.000Z	33 \| good	6.262 \| good	25.046 \| good	27.314 \| good	0.564 \| good	5.271 \| good	0.139 \| good
2026-09-20T12:00:00.000Z	33 \| good	5.713 \| good	24.757 \| good	28.476 \| good	0.428 \| good	8.164 \| good	0.157 \| good
2026-09-20T13:00:00.000Z	33 \| good	6.385 \| good	27.915 \| good	27.189 \| good	0.322 \| good	1.492 \| good	0.241 \| good
2026-09-20T14:00:00.000Z	27 \| good	5.143 \| good	22.982 \| good	27.788 \| good	0.326 \| good	1.489 \| good	0.231 \| good
2026-09-20T15:00:00.000Z	33 \| good	5.754 \| good	25.962 \| good	27.811 \| good	0.308 \| good	1.644 \| good	0.241 \| good
2026-09-20T16:00:00.000Z	26 \| good	4.084 \| good	17.738 \| good	27.943 \| good	0.292 \| good	1.468 \| good	0.231 \| good
2026-09-20T17:00:00.000Z	26 \| good	4.21 \| good	12.583 \| good	27.661 \| good	0.329 \| good	2.243 \| good	0.231 \| good
2026-09-20T18:00:00.000Z	33 \| good	6.166 \| good	25.457 \| good	27.601 \| good	0.296 \| good	2.081 \| good	0.241 \| good
2026-09-20T19:00:00.000Z	33 \| good	6.065 \| good	23.528 \| good	27.76 \| good	0.512 \| good	2.086 \| good	0.241 \| good
2026-09-20T20:00:00.000Z	33 \| good	5.553 \| good	24.729 \| good	27.71 \| good	0.318 \| good	1.771 \| good	0.241 \| good
2026-09-20T21:00:00.000Z	38 \| good	6.822 \| good	25.929 \| good	27.51 \| good	0.472 \| good	2.013 \| good	0.241 \| good
2026-09-20T22:00:00.000Z	33 \| good	6.247 \| good	18.595 \| good	27.769 \| good	0.488 \| good	1.765 \| good	0.241 \| good
2026-09-20T23:00:00.000Z	26 \| good	3.946 \| good	20.452 \| good	27.786 \| good	0.507 \| good	1.823 \| good	0.241 \| good
2026-09-21T00:00:00.000Z	38 \| good	6.739 \| good	31.055 \| good	27.819 \| good	0.323 \| good	2.131 \| good	0.252 \| good
2026-09-21T01:00:00.000Z	27 \| good	5.225 \| good	19.768 \| good	27.736 \| good	0.449 \| good	2.041 \| good	0.252 \| good
2026-09-21T02:00:00.000Z	38 \| good	7.113 \| good	23.814 \| good	26.812 \| good	0.486 \| good	2.125 \| good	0.262 \| good
2026-09-21T03:00:00.000Z	44 \| good	7.653 \| good	33.427 \| good	25.857 \| good	0.465 \| good	5.454 \| good	0.152 \| good
2026-09-21T04:00:00.000Z	24 \| good	3.812 \| good	19.723 \| good	25.71 \| good	0.415 \| good	2.904 \| good	0.302 \| good
2026-09-21T05:00:00.000Z	24 \| good	4.403 \| good	25.887 \| good	24.137 \| good	0.294 \| good	3.082 \| good	0.252 \| good
2026-09-21T06:00:00.000Z	38 \| good	6.741 \| good	21.158 \| good	23.003 \| good	0.437 \| good	3.212 \| good	0.241 \| good
2026-09-21T07:00:00.000Z	27 \| good	5.034 \| good	21.334 \| good	23.403 \| good	0.393 \| good	3.033 \| good	0.241 \| good
2026-09-21T08:00:00.000Z	22 \| good	4.053 \| good	16.759 \| good	23.38 \| good	0.384 \| good	2.019 \| good	0.241 \| good
2026-09-21T09:00:00.000Z	27 \| good	4.837 \| good	17.812 \| good	24.514 \| good	0.31 \| good	1.826 \| good	0.231 \| good
2026-09-21T09:00:00.000Z	22 \| good	3.456 \| good	14.573 \| good	23.955 \| good	0.364 \| good	1.765 \| good	0.231 \| good
2026-09-21T10:00:00.000Z	31 \| good	5.071 \| good	21.765 \| good	32.692 \| good	0.441 \| good	5.502 \| good	0.153 \| good
2026-09-21T11:00:00.000Z	31 \| good	4.944 \| good	21.127 \| good	32.758 \| good	0.426 \| good	5.404 \| good	0.153 \| good
2026-09-21T12:00:00.000Z	29 \| good	5.252 \| good	22.754 \| good	30.99 \| good	0.411 \| good	5.191 \| good	0.153 \| good
2026-09-21T13:00:00.000Z	30 \| good	5.166 \| good	22.486 \| good	31.927 \| good	0.406 \| good	4.776 \| good	0.152 \| good
2026-09-21T14:00:00.000Z	29 \| good	5.268 \| good	22.781 \| good	31.209 \| good	0.405 \| good	4.775 \| good	0.152 \| good
2026-09-21T15:00:00.000Z	33 \| good	6.136 \| good	26.88 \| good	30.655 \| good	0.429 \| good	4.319 \| good	0.151 \| good
2026-09-21T16:00:00.000Z	44 \| good	7.919 \| good	34.469 \| good	30.536 \| good	0.429 \| good	3.151 \| good	0.146 \| good
2026-09-21T17:00:00.000Z	44 \| good	8.303 \| good	36.258 \| good	31.344 \| good	0.427 \| good	2.526 \| good	0.144 \| good
2026-09-21T18:00:00.000Z	49 \| good	8.779 \| good	38.469 \| good	32.424 \| good	0.438 \| good	2.247 \| good	0.142 \| good
2026-09-21T19:00:00.000Z	49 \| good	9.49 \| good	42.385 \| good	34.583 \| good	0.44 \| good	1.803 \| good	0.14 \| good
2026-09-21T20:00:00.000Z	52 \| moderate	9.557 \| good	42.859 \| good	36.898 \| good	0.434 \| good	1.48 \| good	0.137 \| good
2026-09-21T21:00:00.000Z	49 \| good	9.17 \| good	41.166 \| good	37.797 \| good	0.427 \| good	1.344 \| good	0.136 \| good
2026-09-21T22:00:00.000Z	44 \| good	8.25 \| good	36.341 \| good	34.395 \| good	0.42 \| good	1.332 \| good	0.134 \| good
2026-09-21T23:00:00.000Z	44 \| good	7.615 \| good	33.303 \| good	33.228 \| good	0.416 \| good	1.479 \| good	0.133 \| good
2026-09-22T00:00:00.000Z	44 \| good	7.944 \| good	34.748 \| good	32.641 \| good	0.408 \| good	1.778 \| good	0.131 \| good
2026-09-22T01:00:00.000Z	44 \| good	8.333 \| good	36.659 \| good	31.052 \| good	0.411 \| good	2.549 \| good	0.132 \| good
2026-09-22T02:00:00.000Z	49 \| good	8.577 \| good	37.55 \| good	25.854 \| good	0.423 \| good	3.657 \| good	0.134 \| good
2026-09-22T03:00:00.000Z	49 \| good	8.789 \| good	38.349 \| good	25.059 \| good	0.452 \| good	4.652 \| good	0.136 \| good
2026-09-22T04:00:00.000Z	44 \| good	8.24 \| good	36.191 \| good	24.598 \| good	0.476 \| good	5.134 \| good	0.137 \| good
2026-09-22T05:00:00.000Z	38 \| good	7.401 \| good	32.529 \| good	25.488 \| good	0.48 \| good	5.099 \| good	0.136 \| good
2026-09-22T06:00:00.000Z	38 \| good	7.232 \| good	32.059 \| good	27.527 \| good	0.488 \| good	5.285 \| good	0.136 \| good
2026-09-22T07:00:00.000Z	33 \| good	5.805 \| good	25.202 \| good	28.564 \| good	0.484 \| good	5.63 \| good	0.137 \| good
2026-09-22T08:00:00.000Z	33 \| good	6.427 \| good	28.851 \| good	28.657 \| good	0.482 \| good	6.089 \| good	0.139 \| good
2026-09-22T09:00:00.000Z	33 \| good	6.408 \| good	28.382 \| good	29.298 \| good	0.47 \| good	6.694 \| good	0.141 \| good
2026-09-22T10:00:00.000Z	38 \| good	6.864 \| good	30.399 \| good	27.796 \| good	0.469 \| good	6.719 \| good	0.14 \| good
2026-09-22T11:00:00.000Z	38 \| good	7.025 \| good	31.209 \| good	26.163 \| good	0.454 \| good	6.857 \| good	0.14 \| good
2026-09-22T12:00:00.000Z	33 \| good	5.916 \| good	26.238 \| good	24.673 \| good	0.444 \| good	7.018 \| good	0.139 \| good
2026-09-22T13:00:00.000Z	44 \| good	8.266 \| good	36.415 \| good	23.841 \| good	0.436 \| good	7.541 \| good	0.141 \| good
2026-09-22T14:00:00.000Z	49 \| good	8.571 \| good	37.597 \| good	19.772 \| good	0.433 \| good	8.547 \| good	0.145 \| good
2026-09-22T15:00:00.000Z	44 \| good	7.715 \| good	33.77 \| good	20.188 \| good	0.468 \| good	8.814 \| good	0.152 \| good
2026-09-22T16:00:00.000Z	44 \| good	8.233 \| good	35.982 \| good	21.317 \| good	0.543 \| good	5.612 \| good	0.136 \| good
2026-09-22T17:00:00.000Z	44 \| good	8.149 \| good	36.067 \| good	24.573 \| good	0.529 \| good	3.956 \| good	0.132 \| good
2026-09-22T18:00:00.000Z	44 \| good	7.977 \| good	35.078 \| good	27.932 \| good	0.523 \| good	3.063 \| good	0.131 \| good
2026-09-22T19:00:00.000Z	49 \| good	9.277 \| good	41.281 \| good	31.617 \| good	0.537 \| good	2.504 \| good	0.13 \| good
2026-09-22T20:00:00.000Z	44 \| good	8.184 \| good	36.001 \| good	34.295 \| good	0.546 \| good	2.102 \| good	0.13 \| good
2026-09-22T21:00:00.000Z	49 \| good	8.604 \| good	37.542 \| good	36.719 \| good	0.55 \| good	1.867 \| good	0.13 \| good
2026-09-22T22:00:00.000Z	49 \| good	8.564 \| good	37.295 \| good	35.979 \| good	0.556 \| good	1.865 \| good	0.13 \| good
2026-09-22T23:00:00.000Z	49 \| good	8.518 \| good	37.251 \| good	36.612 \| good	0.562 \| good	1.985 \| good	0.129 \| good
2026-09-23T00:00:00.000Z	44 \| good	8.34 \| good	36.742 \| good	34.624 \| good	0.549 \| good	2.372 \| good	0.128 \| good
2026-09-23T01:00:00.000Z	44 \| good	8.3 \| good	36.47 \| good	33.365 \| good	0.519 \| good	3.198 \| good	0.128 \| good
2026-09-23T02:00:00.000Z	44 \| good	8.275 \| good	36.318 \| good	28.067 \| good	0.503 \| good	4.755 \| good	0.13 \| good
2026-09-23T03:00:00.000Z	49 \| good	9.355 \| good	41.649 \| good	28.152 \| good	0.52 \| good	7.94 \| good	0.141 \| good
2026-09-23T04:00:00.000Z	52 \| moderate	10.136 \| good	45.104 \| good	25.17 \| good	0.537 \| good	10.82 \| good	0.151 \| good
2026-09-23T05:00:00.000Z	52 \| moderate	10.148 \| good	44.79 \| good	24.605 \| good	0.537 \| good	13.505 \| good	0.16 \| good
2026-09-23T06:00:00.000Z	52 \| moderate	9.984 \| good	44.509 \| good	22.63 \| good	0.534 \| good	16.181 \| good	0.173 \| good
2026-09-23T07:00:00.000Z	49 \| good	9.27 \| good	41.194 \| good	22.487 \| good	0.519 \| good	17.194 \| good	0.183 \| good
2026-09-23T08:00:00.000Z	49 \| good	9.114 \| good	40.464 \| good	22.309 \| good	0.49 \| good	17.159 \| good	0.184 \| good
2026-09-23T09:00:00.000Z	49 \| good	9.202 \| good	40.723 \| good	20.667 \| good	0.467 \| good	16.813 \| good	0.182 \| good

San Lorenzo

Get reliable air quality data to drive your business

San Lorenzo, California air quality map: Stay updated on AQI near you

0.24ppm

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 San Lorenzo, California?

The air quality information for San Lorenzo, California is updated every hour for accuracy.

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

In the past 24 hours, the air quality in San Lorenzo, California was at its worst at 03:00:00 on 2026-09-21.

When did San Lorenzo, California experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in San Lorenzo, California was observed at 08:00:00 on 2026-09-21.

What is the AQI in San Lorenzo, California right now?

As of now, the AQI in San Lorenzo, California is 22, indicating Good conditions.

What is the most common type of pollution in San Lorenzo, California?

San Lorenzo, California air has the highest levels of O3.

What should I do in case of poor air quality in San Lorenzo, California?

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

What is the PM_2.5 level in San Lorenzo, California at the moment?

PM_2.5 levels in San Lorenzo, California are currently 3.456 μg/m³.

What is the PM₁₀ level in San Lorenzo, California at the moment?

The PM₁₀ concentration in San Lorenzo, California is 14.573 μg/m³ at the moment.

What is the carbon monoxide (CO) level in San Lorenzo, California at the moment?

The current carbon monoxide (CO) concentration in San Lorenzo, California is 0.231 ppm.

What is the sulfur dioxide (SO₂) level in San Lorenzo, California at the moment?

Currently, San Lorenzo, California has a sulfur dioxide (SO₂) concentration of 0.364 ppb.

What is the ozone (O₃) level in San Lorenzo, California at the moment?

The current ozone (O₃) level in San Lorenzo, California at the moment is 23.955 ppm.

What is the nitrogen dioxide (NO₂) level in San Lorenzo, California at the moment?

Nitrogen dioxide (NO₂) level in San Lorenzo, California at the moment is 1.765 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-09-19T10:00:00.000Z	38 \| good	6.942 \| good	27.153 \| good	26.903 \| good	0.481 \| good	3.503 \| good	0.127 \| good
2026-09-19T11:00:00.000Z	44 \| good	7.529 \| good	24.624 \| good	26.903 \| good	0.463 \| good	3.163 \| good	0.126 \| good
2026-09-19T12:00:00.000Z	38 \| good	7.295 \| good	31.905 \| good	27.226 \| good	0.35 \| good	7.546 \| good	0.175 \| good
2026-09-19T13:00:00.000Z	49 \| good	8.502 \| good	32.05 \| good	28.704 \| good	0.263 \| good	2.028 \| good	0.241 \| good
2026-09-19T14:00:00.000Z	44 \| good	7.893 \| good	35.685 \| good	28.653 \| good	0.415 \| good	2.818 \| good	0.231 \| good
2026-09-19T15:00:00.000Z	38 \| good	7.07 \| good	28.326 \| good	28.751 \| good	0.269 \| good	3.442 \| good	0.231 \| good
2026-09-19T16:00:00.000Z	38 \| good	7.106 \| good	30.06 \| good	28.699 \| good	0.288 \| good	2.964 \| good	0.231 \| good
2026-09-19T17:00:00.000Z	38 \| good	6.529 \| good	27.349 \| good	29.591 \| good	0.313 \| good	2.607 \| good	0.252 \| good
2026-09-19T18:00:00.000Z	44 \| good	7.923 \| good	29.837 \| good	28.739 \| good	0.349 \| good	2.299 \| good	0.252 \| good
2026-09-19T19:00:00.000Z	44 \| good	7.814 \| good	36.232 \| good	28.523 \| good	0.334 \| good	2.711 \| good	0.262 \| good
2026-09-19T20:00:00.000Z	49 \| good	8.967 \| good	43.088 \| good	28.845 \| good	0.513 \| good	2.654 \| good	0.27 \| good
2026-09-19T21:00:00.000Z	54 \| moderate	10.689 \| good	41.068 \| good	29.675 \| good	0.392 \| good	2.496 \| good	0.31 \| good
2026-09-19T22:00:00.000Z	49 \| good	8.78 \| good	35.054 \| good	30.363 \| good	0.367 \| good	3.457 \| good	0.308 \| good
2026-09-19T23:00:00.000Z	49 \| good	8.718 \| good	38.265 \| good	31.978 \| good	0.305 \| good	3.364 \| good	0.318 \| good
2026-09-20T00:00:00.000Z	54 \| moderate	10.801 \| good	39.551 \| good	32.486 \| good	0.264 \| good	4.512 \| good	0.302 \| good
2026-09-20T01:00:00.000Z	44 \| good	7.962 \| good	34.13 \| good	32.72 \| good	0.251 \| good	3.029 \| good	0.292 \| good
2026-09-20T02:00:00.000Z	49 \| good	8.511 \| good	44.149 \| good	30.621 \| good	0.233 \| good	2.547 \| good	0.302 \| good
2026-09-20T03:00:00.000Z	52 \| moderate	9.753 \| good	43.463 \| good	27.541 \| good	0.507 \| good	5.067 \| good	0.141 \| good
2026-09-20T04:00:00.000Z	38 \| good	7.339 \| good	32.421 \| good	28.632 \| good	0.338 \| good	4.025 \| good	0.31 \| good
2026-09-20T05:00:00.000Z	38 \| good	7.29 \| good	32.977 \| good	27.766 \| good	0.354 \| good	3.822 \| good	0.252 \| good
2026-09-20T06:00:00.000Z	33 \| good	6.08 \| good	27.126 \| good	27.268 \| good	0.456 \| good	3.251 \| good	0.262 \| good
2026-09-20T07:00:00.000Z	38 \| good	6.552 \| good	27.195 \| good	26.61 \| good	0.306 \| good	4.685 \| good	0.262 \| good
2026-09-20T08:00:00.000Z	33 \| good	6.468 \| good	28.1 \| good	27.432 \| good	0.47 \| good	4.655 \| good	0.262 \| good
2026-09-20T09:00:00.000Z	33 \| good	6.346 \| good	29.648 \| good	27.432 \| good	0.496 \| good	4.025 \| good	0.262 \| good
2026-09-20T10:00:00.000Z	38 \| good	6.801 \| good	29.698 \| good	27.314 \| good	0.657 \| good	6.554 \| good	0.139 \| good
2026-09-20T11:00:00.000Z	33 \| good	6.262 \| good	25.046 \| good	27.314 \| good	0.564 \| good	5.271 \| good	0.139 \| good
2026-09-20T12:00:00.000Z	33 \| good	5.713 \| good	24.757 \| good	28.476 \| good	0.428 \| good	8.164 \| good	0.157 \| good
2026-09-20T13:00:00.000Z	33 \| good	6.385 \| good	27.915 \| good	27.189 \| good	0.322 \| good	1.492 \| good	0.241 \| good
2026-09-20T14:00:00.000Z	27 \| good	5.143 \| good	22.982 \| good	27.788 \| good	0.326 \| good	1.489 \| good	0.231 \| good
2026-09-20T15:00:00.000Z	33 \| good	5.754 \| good	25.962 \| good	27.811 \| good	0.308 \| good	1.644 \| good	0.241 \| good
2026-09-20T16:00:00.000Z	26 \| good	4.084 \| good	17.738 \| good	27.943 \| good	0.292 \| good	1.468 \| good	0.231 \| good
2026-09-20T17:00:00.000Z	26 \| good	4.21 \| good	12.583 \| good	27.661 \| good	0.329 \| good	2.243 \| good	0.231 \| good
2026-09-20T18:00:00.000Z	33 \| good	6.166 \| good	25.457 \| good	27.601 \| good	0.296 \| good	2.081 \| good	0.241 \| good
2026-09-20T19:00:00.000Z	33 \| good	6.065 \| good	23.528 \| good	27.76 \| good	0.512 \| good	2.086 \| good	0.241 \| good
2026-09-20T20:00:00.000Z	33 \| good	5.553 \| good	24.729 \| good	27.71 \| good	0.318 \| good	1.771 \| good	0.241 \| good
2026-09-20T21:00:00.000Z	38 \| good	6.822 \| good	25.929 \| good	27.51 \| good	0.472 \| good	2.013 \| good	0.241 \| good
2026-09-20T22:00:00.000Z	33 \| good	6.247 \| good	18.595 \| good	27.769 \| good	0.488 \| good	1.765 \| good	0.241 \| good
2026-09-20T23:00:00.000Z	26 \| good	3.946 \| good	20.452 \| good	27.786 \| good	0.507 \| good	1.823 \| good	0.241 \| good
2026-09-21T00:00:00.000Z	38 \| good	6.739 \| good	31.055 \| good	27.819 \| good	0.323 \| good	2.131 \| good	0.252 \| good
2026-09-21T01:00:00.000Z	27 \| good	5.225 \| good	19.768 \| good	27.736 \| good	0.449 \| good	2.041 \| good	0.252 \| good
2026-09-21T02:00:00.000Z	38 \| good	7.113 \| good	23.814 \| good	26.812 \| good	0.486 \| good	2.125 \| good	0.262 \| good
2026-09-21T03:00:00.000Z	44 \| good	7.653 \| good	33.427 \| good	25.857 \| good	0.465 \| good	5.454 \| good	0.152 \| good
2026-09-21T04:00:00.000Z	24 \| good	3.812 \| good	19.723 \| good	25.71 \| good	0.415 \| good	2.904 \| good	0.302 \| good
2026-09-21T05:00:00.000Z	24 \| good	4.403 \| good	25.887 \| good	24.137 \| good	0.294 \| good	3.082 \| good	0.252 \| good
2026-09-21T06:00:00.000Z	38 \| good	6.741 \| good	21.158 \| good	23.003 \| good	0.437 \| good	3.212 \| good	0.241 \| good
2026-09-21T07:00:00.000Z	27 \| good	5.034 \| good	21.334 \| good	23.403 \| good	0.393 \| good	3.033 \| good	0.241 \| good
2026-09-21T08:00:00.000Z	22 \| good	4.053 \| good	16.759 \| good	23.38 \| good	0.384 \| good	2.019 \| good	0.241 \| good
2026-09-21T09:00:00.000Z	27 \| good	4.837 \| good	17.812 \| good	24.514 \| good	0.31 \| good	1.826 \| good	0.231 \| good
2026-09-21T09:00:00.000Z	22 \| good	3.456 \| good	14.573 \| good	23.955 \| good	0.364 \| good	1.765 \| good	0.231 \| good
2026-09-21T10:00:00.000Z	31 \| good	5.071 \| good	21.765 \| good	32.692 \| good	0.441 \| good	5.502 \| good	0.153 \| good
2026-09-21T11:00:00.000Z	31 \| good	4.944 \| good	21.127 \| good	32.758 \| good	0.426 \| good	5.404 \| good	0.153 \| good
2026-09-21T12:00:00.000Z	29 \| good	5.252 \| good	22.754 \| good	30.99 \| good	0.411 \| good	5.191 \| good	0.153 \| good
2026-09-21T13:00:00.000Z	30 \| good	5.166 \| good	22.486 \| good	31.927 \| good	0.406 \| good	4.776 \| good	0.152 \| good
2026-09-21T14:00:00.000Z	29 \| good	5.268 \| good	22.781 \| good	31.209 \| good	0.405 \| good	4.775 \| good	0.152 \| good
2026-09-21T15:00:00.000Z	33 \| good	6.136 \| good	26.88 \| good	30.655 \| good	0.429 \| good	4.319 \| good	0.151 \| good
2026-09-21T16:00:00.000Z	44 \| good	7.919 \| good	34.469 \| good	30.536 \| good	0.429 \| good	3.151 \| good	0.146 \| good
2026-09-21T17:00:00.000Z	44 \| good	8.303 \| good	36.258 \| good	31.344 \| good	0.427 \| good	2.526 \| good	0.144 \| good
2026-09-21T18:00:00.000Z	49 \| good	8.779 \| good	38.469 \| good	32.424 \| good	0.438 \| good	2.247 \| good	0.142 \| good
2026-09-21T19:00:00.000Z	49 \| good	9.49 \| good	42.385 \| good	34.583 \| good	0.44 \| good	1.803 \| good	0.14 \| good
2026-09-21T20:00:00.000Z	52 \| moderate	9.557 \| good	42.859 \| good	36.898 \| good	0.434 \| good	1.48 \| good	0.137 \| good
2026-09-21T21:00:00.000Z	49 \| good	9.17 \| good	41.166 \| good	37.797 \| good	0.427 \| good	1.344 \| good	0.136 \| good
2026-09-21T22:00:00.000Z	44 \| good	8.25 \| good	36.341 \| good	34.395 \| good	0.42 \| good	1.332 \| good	0.134 \| good
2026-09-21T23:00:00.000Z	44 \| good	7.615 \| good	33.303 \| good	33.228 \| good	0.416 \| good	1.479 \| good	0.133 \| good
2026-09-22T00:00:00.000Z	44 \| good	7.944 \| good	34.748 \| good	32.641 \| good	0.408 \| good	1.778 \| good	0.131 \| good
2026-09-22T01:00:00.000Z	44 \| good	8.333 \| good	36.659 \| good	31.052 \| good	0.411 \| good	2.549 \| good	0.132 \| good
2026-09-22T02:00:00.000Z	49 \| good	8.577 \| good	37.55 \| good	25.854 \| good	0.423 \| good	3.657 \| good	0.134 \| good
2026-09-22T03:00:00.000Z	49 \| good	8.789 \| good	38.349 \| good	25.059 \| good	0.452 \| good	4.652 \| good	0.136 \| good
2026-09-22T04:00:00.000Z	44 \| good	8.24 \| good	36.191 \| good	24.598 \| good	0.476 \| good	5.134 \| good	0.137 \| good
2026-09-22T05:00:00.000Z	38 \| good	7.401 \| good	32.529 \| good	25.488 \| good	0.48 \| good	5.099 \| good	0.136 \| good
2026-09-22T06:00:00.000Z	38 \| good	7.232 \| good	32.059 \| good	27.527 \| good	0.488 \| good	5.285 \| good	0.136 \| good
2026-09-22T07:00:00.000Z	33 \| good	5.805 \| good	25.202 \| good	28.564 \| good	0.484 \| good	5.63 \| good	0.137 \| good
2026-09-22T08:00:00.000Z	33 \| good	6.427 \| good	28.851 \| good	28.657 \| good	0.482 \| good	6.089 \| good	0.139 \| good
2026-09-22T09:00:00.000Z	33 \| good	6.408 \| good	28.382 \| good	29.298 \| good	0.47 \| good	6.694 \| good	0.141 \| good
2026-09-22T10:00:00.000Z	38 \| good	6.864 \| good	30.399 \| good	27.796 \| good	0.469 \| good	6.719 \| good	0.14 \| good
2026-09-22T11:00:00.000Z	38 \| good	7.025 \| good	31.209 \| good	26.163 \| good	0.454 \| good	6.857 \| good	0.14 \| good
2026-09-22T12:00:00.000Z	33 \| good	5.916 \| good	26.238 \| good	24.673 \| good	0.444 \| good	7.018 \| good	0.139 \| good
2026-09-22T13:00:00.000Z	44 \| good	8.266 \| good	36.415 \| good	23.841 \| good	0.436 \| good	7.541 \| good	0.141 \| good
2026-09-22T14:00:00.000Z	49 \| good	8.571 \| good	37.597 \| good	19.772 \| good	0.433 \| good	8.547 \| good	0.145 \| good
2026-09-22T15:00:00.000Z	44 \| good	7.715 \| good	33.77 \| good	20.188 \| good	0.468 \| good	8.814 \| good	0.152 \| good
2026-09-22T16:00:00.000Z	44 \| good	8.233 \| good	35.982 \| good	21.317 \| good	0.543 \| good	5.612 \| good	0.136 \| good
2026-09-22T17:00:00.000Z	44 \| good	8.149 \| good	36.067 \| good	24.573 \| good	0.529 \| good	3.956 \| good	0.132 \| good
2026-09-22T18:00:00.000Z	44 \| good	7.977 \| good	35.078 \| good	27.932 \| good	0.523 \| good	3.063 \| good	0.131 \| good
2026-09-22T19:00:00.000Z	49 \| good	9.277 \| good	41.281 \| good	31.617 \| good	0.537 \| good	2.504 \| good	0.13 \| good
2026-09-22T20:00:00.000Z	44 \| good	8.184 \| good	36.001 \| good	34.295 \| good	0.546 \| good	2.102 \| good	0.13 \| good
2026-09-22T21:00:00.000Z	49 \| good	8.604 \| good	37.542 \| good	36.719 \| good	0.55 \| good	1.867 \| good	0.13 \| good
2026-09-22T22:00:00.000Z	49 \| good	8.564 \| good	37.295 \| good	35.979 \| good	0.556 \| good	1.865 \| good	0.13 \| good
2026-09-22T23:00:00.000Z	49 \| good	8.518 \| good	37.251 \| good	36.612 \| good	0.562 \| good	1.985 \| good	0.129 \| good
2026-09-23T00:00:00.000Z	44 \| good	8.34 \| good	36.742 \| good	34.624 \| good	0.549 \| good	2.372 \| good	0.128 \| good
2026-09-23T01:00:00.000Z	44 \| good	8.3 \| good	36.47 \| good	33.365 \| good	0.519 \| good	3.198 \| good	0.128 \| good
2026-09-23T02:00:00.000Z	44 \| good	8.275 \| good	36.318 \| good	28.067 \| good	0.503 \| good	4.755 \| good	0.13 \| good
2026-09-23T03:00:00.000Z	49 \| good	9.355 \| good	41.649 \| good	28.152 \| good	0.52 \| good	7.94 \| good	0.141 \| good
2026-09-23T04:00:00.000Z	52 \| moderate	10.136 \| good	45.104 \| good	25.17 \| good	0.537 \| good	10.82 \| good	0.151 \| good
2026-09-23T05:00:00.000Z	52 \| moderate	10.148 \| good	44.79 \| good	24.605 \| good	0.537 \| good	13.505 \| good	0.16 \| good
2026-09-23T06:00:00.000Z	52 \| moderate	9.984 \| good	44.509 \| good	22.63 \| good	0.534 \| good	16.181 \| good	0.173 \| good
2026-09-23T07:00:00.000Z	49 \| good	9.27 \| good	41.194 \| good	22.487 \| good	0.519 \| good	17.194 \| good	0.183 \| good
2026-09-23T08:00:00.000Z	49 \| good	9.114 \| good	40.464 \| good	22.309 \| good	0.49 \| good	17.159 \| good	0.184 \| good
2026-09-23T09:00:00.000Z	49 \| good	9.202 \| good	40.723 \| good	20.667 \| good	0.467 \| good	16.813 \| good	0.182 \| good

Live air quality index in San Lorenzo, California today

Major air pollutants in San Lorenzo, California

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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San Lorenzo, California air quality map: Stay updated on AQI near you

Air quality in nearby cities

Cherryland, California

Ashland, California

Hayward, California

Castro Valley, California

San Leandro, California

Fairview, California

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Frequently asked questions

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Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

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What is the PM₁₀ level in San Lorenzo, California at the moment?

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What is the nitrogen dioxide (NO₂) level in San Lorenzo, California at the moment?