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

Currently, Grass Valley, California has a sulfur dioxide (SO2) concentration of 0.78 ppb.

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

The current ozone (O3) level in Grass Valley, California at the moment is 22.105 ppm.

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

Nitrogen dioxide (NO2) level in Grass Valley, California at the moment is 4.622 ppb.

Live air quality index in Grass Valley, California today

Q: What is the PM2.5 level in Grass Valley, California at the moment?

PM2.5 levels in Grass Valley, California are currently 5.747 μg/m3.

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

The PM10 concentration in Grass Valley, California is 25.474 μg/m3 at the moment.

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

Live AQI (Air Quality Index)

Good

Grass Valley, California

Last updated: ... (Local time)

Major air pollutants in Grass Valley, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

7.37 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

32.21 μg/m³

155

255

425

605+

Ozone (O₃)

20.94 ppb

201

201+

Sulfur Dioxide (SO₂)

0.85 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.32 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.27 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Grass Valley, California

Get Live Pollen Counts

Grass Valley, California

Scroll To Air Quality Map

Track live Grass Valley, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-26T03:00:00.000Z	31 \| good	4.526 \| good	34.085 \| good	28.818 \| good	0.372 \| good	3.204 \| good	0.283 \| good
2025-10-26T04:00:00.000Z	27 \| good	1.928 \| good	22.803 \| good	28.832 \| good	0.372 \| good	3.762 \| good	0.263 \| good
2025-10-26T05:00:00.000Z	28 \| good	3.149 \| good	14.163 \| good	29.534 \| good	0.412 \| good	4.027 \| good	0.279 \| good
2025-10-26T06:00:00.000Z	28 \| good	3.798 \| good	11.58 \| good	30.336 \| good	0.393 \| good	5.311 \| good	0.312 \| good
2025-10-26T07:00:00.000Z	26 \| good	3.409 \| good	13.785 \| good	27.796 \| good	0.372 \| good	3.986 \| good	0.312 \| good
2025-10-26T08:00:00.000Z	25 \| good	3.888 \| good	9.793 \| good	27.083 \| good	0.338 \| good	2.816 \| good	0.298 \| good
2025-10-26T09:00:00.000Z	19 \| good	2.882 \| good	14.059 \| good	20.557 \| good	0.337 \| good	3.028 \| good	0.298 \| good
2025-10-26T10:00:00.000Z	31 \| good	2.599 \| good	11.286 \| good	32.692 \| good	0.206 \| good	3.953 \| good	0.157 \| good
2025-10-26T11:00:00.000Z	31 \| good	2.601 \| good	8.365 \| good	33.142 \| good	0.207 \| good	4.365 \| good	0.145 \| good
2025-10-26T12:00:00.000Z	22 \| good	3.645 \| good	14.643 \| good	23.925 \| good	0.285 \| good	4.272 \| good	0.306 \| good
2025-10-26T13:00:00.000Z	22 \| good	3.86 \| good	9.646 \| good	21.103 \| good	0.451 \| good	4.45 \| good	0.263 \| good
2025-10-26T14:00:00.000Z	28 \| good	3.865 \| good	11.532 \| good	29.832 \| good	0.469 \| good	5.104 \| good	0.263 \| good
2025-10-26T15:00:00.000Z	23 \| good	3.54 \| good	12.45 \| good	24.827 \| good	0.341 \| good	5.45 \| good	0.263 \| good
2025-10-26T16:00:00.000Z	22 \| good	1.403 \| good	11.383 \| good	24.413 \| good	0.39 \| good	6.799 \| good	0.279 \| good
2025-10-26T17:00:00.000Z	22 \| good	3.892 \| good	7.822 \| good	22.249 \| good	0.37 \| good	5.587 \| good	0.295 \| good
2025-10-26T18:00:00.000Z	27 \| good	5.21 \| good	11.627 \| good	28.878 \| good	0.466 \| good	4.462 \| good	0.279 \| good
2025-10-26T19:00:00.000Z	27 \| good	4.853 \| good	22.388 \| good	27.795 \| good	0.489 \| good	3.452 \| good	0.198 \| good
2025-10-26T20:00:00.000Z	29 \| good	5.012 \| good	23.52 \| good	30.68 \| good	0.444 \| good	3.274 \| good	0.198 \| good
2025-10-26T21:00:00.000Z	28 \| good	3.194 \| good	15.766 \| good	29.532 \| good	0.443 \| good	1.688 \| good	0.198 \| good
2025-10-26T22:00:00.000Z	30 \| good	3.665 \| good	19.782 \| good	31.8 \| good	0.427 \| good	1.026 \| good	0.232 \| good
2025-10-26T23:00:00.000Z	29 \| good	4.06 \| good	26.606 \| good	30.94 \| good	0.39 \| good	2.111 \| good	0.214 \| good
2025-10-27T00:00:00.000Z	28 \| good	2.838 \| good	10.641 \| good	29.649 \| good	0.528 \| good	3.159 \| good	0.214 \| good
2025-10-27T01:00:00.000Z	29 \| good	2.953 \| good	15.202 \| good	31.185 \| good	0.528 \| good	2.281 \| good	0.214 \| good
2025-10-27T02:00:00.000Z	27 \| good	2.901 \| good	20.021 \| good	28.546 \| good	0.405 \| good	2.553 \| good	0.248 \| good
2025-10-27T03:00:00.000Z	25 \| good	3.186 \| good	17.747 \| good	27.419 \| good	0.405 \| good	2.918 \| good	0.248 \| good
2025-10-27T04:00:00.000Z	31 \| good	3.249 \| good	24.567 \| good	32.769 \| good	0.39 \| good	2.484 \| good	0.232 \| good
2025-10-27T05:00:00.000Z	27 \| good	0.954 \| good	12.521 \| good	29.424 \| good	0.37 \| good	2.482 \| good	0.232 \| good
2025-10-27T06:00:00.000Z	33 \| good	1.497 \| good	10.966 \| good	36.056 \| good	0.352 \| good	2.08 \| good	0.198 \| good
2025-10-27T07:00:00.000Z	30 \| good	2.05 \| good	7.839 \| good	32.002 \| good	0.424 \| good	2.03 \| good	0.214 \| good
2025-10-27T08:00:00.000Z	29 \| good	1.818 \| good	11.881 \| good	30.805 \| good	0.298 \| good	1.633 \| good	0.198 \| good
2025-10-27T09:00:00.000Z	22 \| good	2.704 \| good	13.419 \| good	24.463 \| good	0.422 \| good	1.627 \| good	0.198 \| good
2025-10-27T10:00:00.000Z	33 \| good	5.7 \| good	14.587 \| good	22.943 \| good	0.384 \| good	2.013 \| good	0.198 \| good
2025-10-27T11:00:00.000Z	33 \| good	5.976 \| good	27.609 \| good	23.876 \| good	0.383 \| good	2.007 \| good	0.232 \| good
2025-10-27T12:00:00.000Z	25 \| good	2.944 \| good	9.414 \| good	27.089 \| good	0.344 \| good	2.419 \| good	0.232 \| good
2025-10-27T13:00:00.000Z	24 \| good	3.212 \| good	24.336 \| good	26.239 \| good	0.419 \| good	5.295 \| good	0.196 \| good
2025-10-27T14:00:00.000Z	24 \| good	1.739 \| good	9.522 \| good	26.101 \| good	0.434 \| good	7.088 \| good	0.247 \| good
2025-10-27T15:00:00.000Z	22 \| good	3.302 \| good	6.532 \| good	24.18 \| good	0.433 \| good	4.038 \| good	0.247 \| good
2025-10-27T16:00:00.000Z	19 \| good	2.682 \| good	4.998 \| good	20.605 \| good	0.497 \| good	7.68 \| good	0.297 \| good
2025-10-27T17:00:00.000Z	20 \| good	1.2 \| good	5.753 \| good	21.943 \| good	0.516 \| good	8.079 \| good	0.263 \| good
2025-10-27T18:00:00.000Z	23 \| good	3.849 \| good	11.822 \| good	24.719 \| good	0.391 \| good	4.799 \| good	0.263 \| good
2025-10-27T19:00:00.000Z	22 \| good	4.022 \| good	22.033 \| good	22.316 \| good	0.439 \| good	2.424 \| good	0.248 \| good
2025-10-27T20:00:00.000Z	23 \| good	2.036 \| good	6.531 \| good	24.922 \| good	0.388 \| good	2.607 \| good	0.248 \| good
2025-10-27T21:00:00.000Z	21 \| good	2.056 \| good	5.429 \| good	23.224 \| good	0.476 \| good	2.797 \| good	0.232 \| good
2025-10-27T22:00:00.000Z	24 \| good	1.918 \| good	6.837 \| good	25.548 \| good	0.45 \| good	2.988 \| good	0.232 \| good
2025-10-27T23:00:00.000Z	26 \| good	1.172 \| good	5.908 \| good	28.207 \| good	0.396 \| good	2.922 \| good	0.232 \| good
2025-10-28T00:00:00.000Z	29 \| good	3.224 \| good	19.691 \| good	31.417 \| good	0.378 \| good	3.352 \| good	0.216 \| good
2025-10-28T01:00:00.000Z	29 \| good	3.871 \| good	8.081 \| good	30.892 \| good	0.763 \| good	4.076 \| good	0.216 \| good
2025-10-28T02:00:00.000Z	27 \| good	2.289 \| good	7.971 \| good	29.172 \| good	0.836 \| good	3.72 \| good	0.265 \| good
2025-10-28T02:00:00.000Z	38 \| good	7.371 \| good	32.206 \| good	20.938 \| good	0.854 \| good	5.317 \| good	0.267 \| good
2025-10-28T03:00:00.000Z	25 \| good	4.01 \| good	17.61 \| good	26.98 \| good	0.251 \| good	6.51 \| good	0.198 \| good
2025-10-28T04:00:00.000Z	27 \| good	4.768 \| good	21.028 \| good	28.476 \| good	0.252 \| good	7.129 \| good	0.208 \| good
2025-10-28T05:00:00.000Z	28 \| good	2.614 \| good	11.086 \| good	30.034 \| good	0.252 \| good	7.749 \| good	0.219 \| good
2025-10-28T06:00:00.000Z	33 \| good	4.205 \| good	18.5 \| good	36.09 \| good	0.253 \| good	8.368 \| good	0.229 \| good
2025-10-28T07:00:00.000Z	35 \| good	2.275 \| good	9.368 \| good	37.845 \| good	0.239 \| good	7.748 \| good	0.216 \| good
2025-10-28T08:00:00.000Z	36 \| good	4.813 \| good	20.834 \| good	38.68 \| good	0.225 \| good	7.128 \| good	0.203 \| good
2025-10-28T09:00:00.000Z	34 \| good	3.07 \| good	12.898 \| good	36.819 \| good	0.211 \| good	6.508 \| good	0.19 \| good
2025-10-28T10:00:00.000Z	34 \| good	4.552 \| good	19.918 \| good	37.143 \| good	0.231 \| good	5.955 \| good	0.177 \| good
2025-10-28T11:00:00.000Z	34 \| good	3.489 \| good	15.066 \| good	36.714 \| good	0.251 \| good	5.401 \| good	0.165 \| good
2025-10-28T12:00:00.000Z	31 \| good	3.745 \| good	16.288 \| good	33.584 \| good	0.271 \| good	4.847 \| good	0.152 \| good
2025-10-28T13:00:00.000Z	29 \| good	3.309 \| good	13.938 \| good	30.749 \| good	0.291 \| good	4.87 \| good	0.152 \| good
2025-10-28T14:00:00.000Z	29 \| good	2.877 \| good	11.977 \| good	31.036 \| good	0.311 \| good	4.892 \| good	0.152 \| good
2025-10-28T15:00:00.000Z	29 \| good	3.891 \| good	16.923 \| good	31.254 \| good	0.331 \| good	4.915 \| good	0.153 \| good
2025-10-28T16:00:00.000Z	27 \| good	4.936 \| good	21.432 \| good	27.56 \| good	0.362 \| good	4.185 \| good	0.15 \| good
2025-10-28T17:00:00.000Z	30 \| good	3.436 \| good	15.003 \| good	31.745 \| good	0.392 \| good	3.455 \| good	0.148 \| good
2025-10-28T18:00:00.000Z	32 \| good	5.436 \| good	23.584 \| good	34.511 \| good	0.422 \| good	2.724 \| good	0.145 \| good
2025-10-28T19:00:00.000Z	38 \| good	6.848 \| good	30.082 \| good	36.829 \| good	0.436 \| good	2.443 \| good	0.143 \| good
2025-10-28T20:00:00.000Z	37 \| good	4.032 \| good	17.758 \| good	40.478 \| good	0.449 \| good	2.162 \| good	0.141 \| good
2025-10-28T21:00:00.000Z	40 \| good	7.432 \| good	32.441 \| good	42.677 \| good	0.463 \| good	1.88 \| good	0.138 \| good
2025-10-28T22:00:00.000Z	44 \| good	7.579 \| good	33.461 \| good	46.727 \| good	0.449 \| good	1.93 \| good	0.139 \| good
2025-10-28T23:00:00.000Z	45 \| good	7.422 \| good	32.809 \| good	49.491 \| good	0.435 \| good	1.979 \| good	0.14 \| good
2025-10-29T00:00:00.000Z	52 \| moderate	10.071 \| good	44.59 \| good	46.68 \| good	0.421 \| good	2.029 \| good	0.141 \| good
2025-10-29T01:00:00.000Z	54 \| moderate	11.038 \| good	49.11 \| good	40.027 \| good	0.447 \| good	4.982 \| good	0.181 \| good
2025-10-29T02:00:00.000Z	56 \| moderate	12.098 \| good	53.732 \| good	34.411 \| good	0.472 \| good	7.935 \| good	0.22 \| good
2025-10-29T03:00:00.000Z	54 \| moderate	10.683 \| good	47.657 \| good	30.879 \| good	0.497 \| good	10.889 \| good	0.26 \| good
2025-10-29T04:00:00.000Z	49 \| good	8.891 \| good	39.349 \| good	32.853 \| good	0.447 \| good	10.694 \| good	0.262 \| good
2025-10-29T05:00:00.000Z	33 \| good	5.533 \| good	24.055 \| good	30.119 \| good	0.397 \| good	10.5 \| good	0.264 \| good
2025-10-29T06:00:00.000Z	33 \| good	5.564 \| good	24.184 \| good	26.869 \| good	0.348 \| good	10.305 \| good	0.266 \| good
2025-10-29T07:00:00.000Z	23 \| good	3.405 \| good	14.312 \| good	25.038 \| good	0.315 \| good	9.747 \| good	0.257 \| good
2025-10-29T08:00:00.000Z	22 \| good	4.016 \| good	17.59 \| good	24.131 \| good	0.282 \| good	9.189 \| good	0.248 \| good
2025-10-29T09:00:00.000Z	22 \| good	2.277 \| good	9.326 \| good	24.356 \| good	0.25 \| good	8.631 \| good	0.239 \| good
2025-10-29T10:00:00.000Z	27 \| good	5.051 \| good	22.089 \| good	27.053 \| good	0.245 \| good	7.784 \| good	0.221 \| good
2025-10-29T11:00:00.000Z	27 \| good	5.151 \| good	22.311 \| good	27.84 \| good	0.241 \| good	6.938 \| good	0.203 \| good
2025-10-29T12:00:00.000Z	30 \| good	5.168 \| good	22.256 \| good	31.659 \| good	0.236 \| good	6.091 \| good	0.184 \| good
2025-10-29T13:00:00.000Z	26 \| good	4.253 \| good	18.756 \| good	27.919 \| good	0.255 \| good	6.173 \| good	0.187 \| good
2025-10-29T14:00:00.000Z	26 \| good	1.668 \| good	7.043 \| good	28.228 \| good	0.273 \| good	6.255 \| good	0.189 \| good
2025-10-29T15:00:00.000Z	30 \| good	2.753 \| good	11.572 \| good	31.727 \| good	0.291 \| good	6.337 \| good	0.191 \| good
2025-10-29T16:00:00.000Z	28 \| good	4.139 \| good	18.01 \| good	30.426 \| good	0.35 \| good	4.875 \| good	0.175 \| good
2025-10-29T17:00:00.000Z	33 \| good	2.824 \| good	12.036 \| good	35.591 \| good	0.408 \| good	3.412 \| good	0.158 \| good
2025-10-29T18:00:00.000Z	33 \| good	4.312 \| good	18.936 \| good	35.917 \| good	0.467 \| good	1.949 \| good	0.141 \| good
2025-10-29T19:00:00.000Z	34 \| good	5.702 \| good	24.905 \| good	36.525 \| good	0.433 \| good	1.571 \| good	0.133 \| good
2025-10-29T20:00:00.000Z	35 \| good	1.77 \| good	7.352 \| good	37.827 \| good	0.398 \| good	1.192 \| good	0.125 \| good
2025-10-29T21:00:00.000Z	35 \| good	1.995 \| good	8.3 \| good	38.039 \| good	0.363 \| good	0.813 \| good	0.117 \| good
2025-10-29T22:00:00.000Z	39 \| good	2.994 \| good	12.524 \| good	41.962 \| good	0.343 \| good	1.146 \| good	0.122 \| good
2025-10-29T23:00:00.000Z	41 \| good	1.796 \| good	7.412 \| good	43.543 \| good	0.322 \| good	1.479 \| good	0.127 \| good
2025-10-30T00:00:00.000Z	43 \| good	3.464 \| good	3.74 \| good	46.43 \| good	0.303 \| good	1.826 \| good	0.132 \| good
2025-10-30T01:00:00.000Z	33 \| good	4.789 \| good	20.964 \| good	35.593 \| good	0.339 \| good	4.453 \| good	0.168 \| good
2025-10-30T02:00:00.000Z	29 \| good	4.975 \| good	21.463 \| good	30.641 \| good	0.377 \| good	7.094 \| good	0.204 \| good

Grass Valley

Get reliable air quality data to drive your business

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

0.23ppm

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 Grass Valley, California?

The air quality information for Grass Valley, California is updated every hour for accuracy.

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

In the past 24 hours, the air quality in Grass Valley, California was at its worst at 11:00:00 on 2025-10-27.

When did Grass Valley, California experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Grass Valley, California was observed at 04:00:00 on 2025-10-27.

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

As of now, the AQI in Grass Valley, California is 33, indicating Good conditions.

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

Grass Valley, California air has the highest levels of PM2.5.

What should I do in case of poor air quality in Grass Valley, California?

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

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

PM_2.5 levels in Grass Valley, California are currently 5.747 μg/m³.

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

The PM₁₀ concentration in Grass Valley, California is 25.474 μg/m³ at the moment.

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

The current carbon monoxide (CO) concentration in Grass Valley, California is 0.216 ppm.

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

Currently, Grass Valley, California has a sulfur dioxide (SO₂) concentration of 0.78 ppb.

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

The current ozone (O₃) level in Grass Valley, California at the moment is 22.105 ppm.

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

Nitrogen dioxide (NO₂) level in Grass Valley, California at the moment is 4.622 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-26T03:00:00.000Z	31 \| good	4.526 \| good	34.085 \| good	28.818 \| good	0.372 \| good	3.204 \| good	0.283 \| good
2025-10-26T04:00:00.000Z	27 \| good	1.928 \| good	22.803 \| good	28.832 \| good	0.372 \| good	3.762 \| good	0.263 \| good
2025-10-26T05:00:00.000Z	28 \| good	3.149 \| good	14.163 \| good	29.534 \| good	0.412 \| good	4.027 \| good	0.279 \| good
2025-10-26T06:00:00.000Z	28 \| good	3.798 \| good	11.58 \| good	30.336 \| good	0.393 \| good	5.311 \| good	0.312 \| good
2025-10-26T07:00:00.000Z	26 \| good	3.409 \| good	13.785 \| good	27.796 \| good	0.372 \| good	3.986 \| good	0.312 \| good
2025-10-26T08:00:00.000Z	25 \| good	3.888 \| good	9.793 \| good	27.083 \| good	0.338 \| good	2.816 \| good	0.298 \| good
2025-10-26T09:00:00.000Z	19 \| good	2.882 \| good	14.059 \| good	20.557 \| good	0.337 \| good	3.028 \| good	0.298 \| good
2025-10-26T10:00:00.000Z	31 \| good	2.599 \| good	11.286 \| good	32.692 \| good	0.206 \| good	3.953 \| good	0.157 \| good
2025-10-26T11:00:00.000Z	31 \| good	2.601 \| good	8.365 \| good	33.142 \| good	0.207 \| good	4.365 \| good	0.145 \| good
2025-10-26T12:00:00.000Z	22 \| good	3.645 \| good	14.643 \| good	23.925 \| good	0.285 \| good	4.272 \| good	0.306 \| good
2025-10-26T13:00:00.000Z	22 \| good	3.86 \| good	9.646 \| good	21.103 \| good	0.451 \| good	4.45 \| good	0.263 \| good
2025-10-26T14:00:00.000Z	28 \| good	3.865 \| good	11.532 \| good	29.832 \| good	0.469 \| good	5.104 \| good	0.263 \| good
2025-10-26T15:00:00.000Z	23 \| good	3.54 \| good	12.45 \| good	24.827 \| good	0.341 \| good	5.45 \| good	0.263 \| good
2025-10-26T16:00:00.000Z	22 \| good	1.403 \| good	11.383 \| good	24.413 \| good	0.39 \| good	6.799 \| good	0.279 \| good
2025-10-26T17:00:00.000Z	22 \| good	3.892 \| good	7.822 \| good	22.249 \| good	0.37 \| good	5.587 \| good	0.295 \| good
2025-10-26T18:00:00.000Z	27 \| good	5.21 \| good	11.627 \| good	28.878 \| good	0.466 \| good	4.462 \| good	0.279 \| good
2025-10-26T19:00:00.000Z	27 \| good	4.853 \| good	22.388 \| good	27.795 \| good	0.489 \| good	3.452 \| good	0.198 \| good
2025-10-26T20:00:00.000Z	29 \| good	5.012 \| good	23.52 \| good	30.68 \| good	0.444 \| good	3.274 \| good	0.198 \| good
2025-10-26T21:00:00.000Z	28 \| good	3.194 \| good	15.766 \| good	29.532 \| good	0.443 \| good	1.688 \| good	0.198 \| good
2025-10-26T22:00:00.000Z	30 \| good	3.665 \| good	19.782 \| good	31.8 \| good	0.427 \| good	1.026 \| good	0.232 \| good
2025-10-26T23:00:00.000Z	29 \| good	4.06 \| good	26.606 \| good	30.94 \| good	0.39 \| good	2.111 \| good	0.214 \| good
2025-10-27T00:00:00.000Z	28 \| good	2.838 \| good	10.641 \| good	29.649 \| good	0.528 \| good	3.159 \| good	0.214 \| good
2025-10-27T01:00:00.000Z	29 \| good	2.953 \| good	15.202 \| good	31.185 \| good	0.528 \| good	2.281 \| good	0.214 \| good
2025-10-27T02:00:00.000Z	27 \| good	2.901 \| good	20.021 \| good	28.546 \| good	0.405 \| good	2.553 \| good	0.248 \| good
2025-10-27T03:00:00.000Z	25 \| good	3.186 \| good	17.747 \| good	27.419 \| good	0.405 \| good	2.918 \| good	0.248 \| good
2025-10-27T04:00:00.000Z	31 \| good	3.249 \| good	24.567 \| good	32.769 \| good	0.39 \| good	2.484 \| good	0.232 \| good
2025-10-27T05:00:00.000Z	27 \| good	0.954 \| good	12.521 \| good	29.424 \| good	0.37 \| good	2.482 \| good	0.232 \| good
2025-10-27T06:00:00.000Z	33 \| good	1.497 \| good	10.966 \| good	36.056 \| good	0.352 \| good	2.08 \| good	0.198 \| good
2025-10-27T07:00:00.000Z	30 \| good	2.05 \| good	7.839 \| good	32.002 \| good	0.424 \| good	2.03 \| good	0.214 \| good
2025-10-27T08:00:00.000Z	29 \| good	1.818 \| good	11.881 \| good	30.805 \| good	0.298 \| good	1.633 \| good	0.198 \| good
2025-10-27T09:00:00.000Z	22 \| good	2.704 \| good	13.419 \| good	24.463 \| good	0.422 \| good	1.627 \| good	0.198 \| good
2025-10-27T10:00:00.000Z	33 \| good	5.7 \| good	14.587 \| good	22.943 \| good	0.384 \| good	2.013 \| good	0.198 \| good
2025-10-27T11:00:00.000Z	33 \| good	5.976 \| good	27.609 \| good	23.876 \| good	0.383 \| good	2.007 \| good	0.232 \| good
2025-10-27T12:00:00.000Z	25 \| good	2.944 \| good	9.414 \| good	27.089 \| good	0.344 \| good	2.419 \| good	0.232 \| good
2025-10-27T13:00:00.000Z	24 \| good	3.212 \| good	24.336 \| good	26.239 \| good	0.419 \| good	5.295 \| good	0.196 \| good
2025-10-27T14:00:00.000Z	24 \| good	1.739 \| good	9.522 \| good	26.101 \| good	0.434 \| good	7.088 \| good	0.247 \| good
2025-10-27T15:00:00.000Z	22 \| good	3.302 \| good	6.532 \| good	24.18 \| good	0.433 \| good	4.038 \| good	0.247 \| good
2025-10-27T16:00:00.000Z	19 \| good	2.682 \| good	4.998 \| good	20.605 \| good	0.497 \| good	7.68 \| good	0.297 \| good
2025-10-27T17:00:00.000Z	20 \| good	1.2 \| good	5.753 \| good	21.943 \| good	0.516 \| good	8.079 \| good	0.263 \| good
2025-10-27T18:00:00.000Z	23 \| good	3.849 \| good	11.822 \| good	24.719 \| good	0.391 \| good	4.799 \| good	0.263 \| good
2025-10-27T19:00:00.000Z	22 \| good	4.022 \| good	22.033 \| good	22.316 \| good	0.439 \| good	2.424 \| good	0.248 \| good
2025-10-27T20:00:00.000Z	23 \| good	2.036 \| good	6.531 \| good	24.922 \| good	0.388 \| good	2.607 \| good	0.248 \| good
2025-10-27T21:00:00.000Z	21 \| good	2.056 \| good	5.429 \| good	23.224 \| good	0.476 \| good	2.797 \| good	0.232 \| good
2025-10-27T22:00:00.000Z	24 \| good	1.918 \| good	6.837 \| good	25.548 \| good	0.45 \| good	2.988 \| good	0.232 \| good
2025-10-27T23:00:00.000Z	26 \| good	1.172 \| good	5.908 \| good	28.207 \| good	0.396 \| good	2.922 \| good	0.232 \| good
2025-10-28T00:00:00.000Z	29 \| good	3.224 \| good	19.691 \| good	31.417 \| good	0.378 \| good	3.352 \| good	0.216 \| good
2025-10-28T01:00:00.000Z	29 \| good	3.871 \| good	8.081 \| good	30.892 \| good	0.763 \| good	4.076 \| good	0.216 \| good
2025-10-28T02:00:00.000Z	27 \| good	2.289 \| good	7.971 \| good	29.172 \| good	0.836 \| good	3.72 \| good	0.265 \| good
2025-10-28T02:00:00.000Z	38 \| good	7.371 \| good	32.206 \| good	20.938 \| good	0.854 \| good	5.317 \| good	0.267 \| good
2025-10-28T03:00:00.000Z	25 \| good	4.01 \| good	17.61 \| good	26.98 \| good	0.251 \| good	6.51 \| good	0.198 \| good
2025-10-28T04:00:00.000Z	27 \| good	4.768 \| good	21.028 \| good	28.476 \| good	0.252 \| good	7.129 \| good	0.208 \| good
2025-10-28T05:00:00.000Z	28 \| good	2.614 \| good	11.086 \| good	30.034 \| good	0.252 \| good	7.749 \| good	0.219 \| good
2025-10-28T06:00:00.000Z	33 \| good	4.205 \| good	18.5 \| good	36.09 \| good	0.253 \| good	8.368 \| good	0.229 \| good
2025-10-28T07:00:00.000Z	35 \| good	2.275 \| good	9.368 \| good	37.845 \| good	0.239 \| good	7.748 \| good	0.216 \| good
2025-10-28T08:00:00.000Z	36 \| good	4.813 \| good	20.834 \| good	38.68 \| good	0.225 \| good	7.128 \| good	0.203 \| good
2025-10-28T09:00:00.000Z	34 \| good	3.07 \| good	12.898 \| good	36.819 \| good	0.211 \| good	6.508 \| good	0.19 \| good
2025-10-28T10:00:00.000Z	34 \| good	4.552 \| good	19.918 \| good	37.143 \| good	0.231 \| good	5.955 \| good	0.177 \| good
2025-10-28T11:00:00.000Z	34 \| good	3.489 \| good	15.066 \| good	36.714 \| good	0.251 \| good	5.401 \| good	0.165 \| good
2025-10-28T12:00:00.000Z	31 \| good	3.745 \| good	16.288 \| good	33.584 \| good	0.271 \| good	4.847 \| good	0.152 \| good
2025-10-28T13:00:00.000Z	29 \| good	3.309 \| good	13.938 \| good	30.749 \| good	0.291 \| good	4.87 \| good	0.152 \| good
2025-10-28T14:00:00.000Z	29 \| good	2.877 \| good	11.977 \| good	31.036 \| good	0.311 \| good	4.892 \| good	0.152 \| good
2025-10-28T15:00:00.000Z	29 \| good	3.891 \| good	16.923 \| good	31.254 \| good	0.331 \| good	4.915 \| good	0.153 \| good
2025-10-28T16:00:00.000Z	27 \| good	4.936 \| good	21.432 \| good	27.56 \| good	0.362 \| good	4.185 \| good	0.15 \| good
2025-10-28T17:00:00.000Z	30 \| good	3.436 \| good	15.003 \| good	31.745 \| good	0.392 \| good	3.455 \| good	0.148 \| good
2025-10-28T18:00:00.000Z	32 \| good	5.436 \| good	23.584 \| good	34.511 \| good	0.422 \| good	2.724 \| good	0.145 \| good
2025-10-28T19:00:00.000Z	38 \| good	6.848 \| good	30.082 \| good	36.829 \| good	0.436 \| good	2.443 \| good	0.143 \| good
2025-10-28T20:00:00.000Z	37 \| good	4.032 \| good	17.758 \| good	40.478 \| good	0.449 \| good	2.162 \| good	0.141 \| good
2025-10-28T21:00:00.000Z	40 \| good	7.432 \| good	32.441 \| good	42.677 \| good	0.463 \| good	1.88 \| good	0.138 \| good
2025-10-28T22:00:00.000Z	44 \| good	7.579 \| good	33.461 \| good	46.727 \| good	0.449 \| good	1.93 \| good	0.139 \| good
2025-10-28T23:00:00.000Z	45 \| good	7.422 \| good	32.809 \| good	49.491 \| good	0.435 \| good	1.979 \| good	0.14 \| good
2025-10-29T00:00:00.000Z	52 \| moderate	10.071 \| good	44.59 \| good	46.68 \| good	0.421 \| good	2.029 \| good	0.141 \| good
2025-10-29T01:00:00.000Z	54 \| moderate	11.038 \| good	49.11 \| good	40.027 \| good	0.447 \| good	4.982 \| good	0.181 \| good
2025-10-29T02:00:00.000Z	56 \| moderate	12.098 \| good	53.732 \| good	34.411 \| good	0.472 \| good	7.935 \| good	0.22 \| good
2025-10-29T03:00:00.000Z	54 \| moderate	10.683 \| good	47.657 \| good	30.879 \| good	0.497 \| good	10.889 \| good	0.26 \| good
2025-10-29T04:00:00.000Z	49 \| good	8.891 \| good	39.349 \| good	32.853 \| good	0.447 \| good	10.694 \| good	0.262 \| good
2025-10-29T05:00:00.000Z	33 \| good	5.533 \| good	24.055 \| good	30.119 \| good	0.397 \| good	10.5 \| good	0.264 \| good
2025-10-29T06:00:00.000Z	33 \| good	5.564 \| good	24.184 \| good	26.869 \| good	0.348 \| good	10.305 \| good	0.266 \| good
2025-10-29T07:00:00.000Z	23 \| good	3.405 \| good	14.312 \| good	25.038 \| good	0.315 \| good	9.747 \| good	0.257 \| good
2025-10-29T08:00:00.000Z	22 \| good	4.016 \| good	17.59 \| good	24.131 \| good	0.282 \| good	9.189 \| good	0.248 \| good
2025-10-29T09:00:00.000Z	22 \| good	2.277 \| good	9.326 \| good	24.356 \| good	0.25 \| good	8.631 \| good	0.239 \| good
2025-10-29T10:00:00.000Z	27 \| good	5.051 \| good	22.089 \| good	27.053 \| good	0.245 \| good	7.784 \| good	0.221 \| good
2025-10-29T11:00:00.000Z	27 \| good	5.151 \| good	22.311 \| good	27.84 \| good	0.241 \| good	6.938 \| good	0.203 \| good
2025-10-29T12:00:00.000Z	30 \| good	5.168 \| good	22.256 \| good	31.659 \| good	0.236 \| good	6.091 \| good	0.184 \| good
2025-10-29T13:00:00.000Z	26 \| good	4.253 \| good	18.756 \| good	27.919 \| good	0.255 \| good	6.173 \| good	0.187 \| good
2025-10-29T14:00:00.000Z	26 \| good	1.668 \| good	7.043 \| good	28.228 \| good	0.273 \| good	6.255 \| good	0.189 \| good
2025-10-29T15:00:00.000Z	30 \| good	2.753 \| good	11.572 \| good	31.727 \| good	0.291 \| good	6.337 \| good	0.191 \| good
2025-10-29T16:00:00.000Z	28 \| good	4.139 \| good	18.01 \| good	30.426 \| good	0.35 \| good	4.875 \| good	0.175 \| good
2025-10-29T17:00:00.000Z	33 \| good	2.824 \| good	12.036 \| good	35.591 \| good	0.408 \| good	3.412 \| good	0.158 \| good
2025-10-29T18:00:00.000Z	33 \| good	4.312 \| good	18.936 \| good	35.917 \| good	0.467 \| good	1.949 \| good	0.141 \| good
2025-10-29T19:00:00.000Z	34 \| good	5.702 \| good	24.905 \| good	36.525 \| good	0.433 \| good	1.571 \| good	0.133 \| good
2025-10-29T20:00:00.000Z	35 \| good	1.77 \| good	7.352 \| good	37.827 \| good	0.398 \| good	1.192 \| good	0.125 \| good
2025-10-29T21:00:00.000Z	35 \| good	1.995 \| good	8.3 \| good	38.039 \| good	0.363 \| good	0.813 \| good	0.117 \| good
2025-10-29T22:00:00.000Z	39 \| good	2.994 \| good	12.524 \| good	41.962 \| good	0.343 \| good	1.146 \| good	0.122 \| good
2025-10-29T23:00:00.000Z	41 \| good	1.796 \| good	7.412 \| good	43.543 \| good	0.322 \| good	1.479 \| good	0.127 \| good
2025-10-30T00:00:00.000Z	43 \| good	3.464 \| good	3.74 \| good	46.43 \| good	0.303 \| good	1.826 \| good	0.132 \| good
2025-10-30T01:00:00.000Z	33 \| good	4.789 \| good	20.964 \| good	35.593 \| good	0.339 \| good	4.453 \| good	0.168 \| good
2025-10-30T02:00:00.000Z	29 \| good	4.975 \| good	21.463 \| good	30.641 \| good	0.377 \| good	7.094 \| good	0.204 \| good

Live air quality index in Grass Valley, California today

Major air pollutants in Grass 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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Grass Valley, California air quality map: Stay updated on AQI near you

Air quality in nearby cities

North Auburn, California

Auburn, California

Lincoln, California

Linda, California

Olivehurst, California

Marysville, California

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Frequently asked questions

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

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

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

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

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

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

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

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

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