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 0.635 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 33.019 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 7.035 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 6.746 μg/m3.

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

The PM10 concentration in Grass Valley, California is 32.066 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)

6.75 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

32.07 μg/m³

155

255

425

605+

Ozone (O₃)

33.02 ppb

201

201+

Sulfur Dioxide (SO₂)

0.64 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

7.04 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.34 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
2026-10-20T23:00:00.000Z	39 \| good	6.769 \| good	29.246 \| good	42.265 \| good	0.585 \| good	2.896 \| good	0.252 \| good
2026-10-21T00:00:00.000Z	38 \| good	5.17 \| good	27.021 \| good	41.385 \| good	0.526 \| good	2.403 \| good	0.282 \| good
2026-10-21T01:00:00.000Z	37 \| good	5.438 \| good	22.793 \| good	40.375 \| good	0.63 \| good	2.756 \| good	0.268 \| good
2026-10-21T02:00:00.000Z	37 \| good	6.29 \| good	24.941 \| good	40.068 \| good	0.573 \| good	5.493 \| good	0.386 \| good
2026-10-21T03:00:00.000Z	34 \| good	6.093 \| good	27.045 \| good	37.223 \| good	0.277 \| good	5.561 \| good	0.175 \| good
2026-10-21T04:00:00.000Z	35 \| good	6.192 \| good	31.695 \| good	37.652 \| good	0.586 \| good	10.456 \| good	0.402 \| good
2026-10-21T05:00:00.000Z	38 \| good	7.394 \| good	34.38 \| good	39.19 \| good	0.584 \| good	10.349 \| good	0.432 \| good
2026-10-21T06:00:00.000Z	38 \| good	6.955 \| good	36.725 \| good	39.791 \| good	0.715 \| good	7.392 \| good	0.414 \| good
2026-10-21T07:00:00.000Z	58 \| moderate	12.589 \| fine	47.586 \| good	38.798 \| good	0.566 \| good	7.499 \| good	0.415 \| good
2026-10-21T08:00:00.000Z	49 \| good	9.442 \| good	37.549 \| good	38.831 \| good	0.6 \| good	6.804 \| good	0.381 \| good
2026-10-21T09:00:00.000Z	44 \| good	8.336 \| good	43.702 \| good	39.667 \| good	0.675 \| good	9.789 \| good	0.472 \| good
2026-10-21T10:00:00.000Z	39 \| good	6.787 \| good	30.991 \| good	42.442 \| good	0.563 \| good	9.307 \| good	0.406 \| good
2026-10-21T11:00:00.000Z	40 \| good	6.892 \| good	29.51 \| good	43.176 \| good	0.563 \| good	7.421 \| good	0.378 \| good
2026-10-21T12:00:00.000Z	38 \| good	6.126 \| good	30.852 \| good	41.195 \| good	0.584 \| good	5.584 \| good	0.428 \| good
2026-10-21T13:00:00.000Z	41 \| good	6.439 \| good	22.458 \| good	43.704 \| good	0.682 \| good	6.259 \| good	0.382 \| good
2026-10-21T14:00:00.000Z	49 \| good	9.104 \| good	26.977 \| good	42.739 \| good	0.802 \| good	6.1 \| good	0.379 \| good
2026-10-21T15:00:00.000Z	49 \| good	8.815 \| good	28.383 \| good	41.147 \| good	0.764 \| good	7.748 \| good	0.428 \| good
2026-10-21T16:00:00.000Z	42 \| good	7.009 \| good	44.805 \| good	41.148 \| good	0.775 \| good	12.165 \| good	0.341 \| good
2026-10-21T17:00:00.000Z	44 \| good	7.774 \| good	37.241 \| good	41.959 \| good	0.746 \| good	13.997 \| good	0.371 \| good
2026-10-21T18:00:00.000Z	49 \| good	9.406 \| good	39.422 \| good	38.523 \| good	0.755 \| good	16.861 \| good	0.374 \| good
2026-10-21T19:00:00.000Z	52 \| moderate	10.134 \| good	38.519 \| good	39.688 \| good	0.672 \| good	14.816 \| good	0.295 \| good
2026-10-21T20:00:00.000Z	54 \| moderate	10.901 \| good	46.014 \| good	39.256 \| good	0.571 \| good	14.953 \| good	0.328 \| good
2026-10-21T21:00:00.000Z	52 \| moderate	10.279 \| good	48.504 \| good	39.79 \| good	0.694 \| good	11.821 \| good	0.328 \| good
2026-10-21T22:00:00.000Z	54 \| moderate	11.326 \| good	46.037 \| good	39.784 \| good	0.65 \| good	12.215 \| good	0.414 \| good
2026-10-21T23:00:00.000Z	52 \| moderate	10.022 \| good	44.917 \| good	39.792 \| good	0.644 \| good	12.163 \| good	0.352 \| good
2026-10-22T00:00:00.000Z	49 \| good	9.156 \| good	45.885 \| good	39.547 \| good	0.622 \| good	7.408 \| good	0.332 \| good
2026-10-22T01:00:00.000Z	49 \| good	9.468 \| good	45.637 \| good	38.191 \| good	0.573 \| good	9.007 \| good	0.349 \| good
2026-10-22T02:00:00.000Z	38 \| good	7.379 \| good	23.093 \| good	36.098 \| good	0.582 \| good	6.793 \| good	0.383 \| good
2026-10-22T03:00:00.000Z	40 \| good	6.343 \| good	28.399 \| good	43.305 \| good	0.27 \| good	6.745 \| good	0.179 \| good
2026-10-22T04:00:00.000Z	52 \| moderate	9.593 \| good	31.712 \| good	35.568 \| good	0.613 \| good	6.263 \| good	0.432 \| good
2026-10-22T05:00:00.000Z	38 \| good	7.336 \| good	30.042 \| good	35.064 \| good	0.58 \| good	7.517 \| good	0.514 \| good
2026-10-22T06:00:00.000Z	33 \| good	5.873 \| good	27.281 \| good	33.824 \| good	0.598 \| good	8.192 \| good	0.428 \| good
2026-10-22T07:00:00.000Z	38 \| good	6.584 \| good	27.769 \| good	32.008 \| good	0.552 \| good	9.361 \| good	0.4 \| good
2026-10-22T08:00:00.000Z	44 \| good	7.956 \| good	31.397 \| good	31.899 \| good	0.586 \| good	7.817 \| good	0.38 \| good
2026-10-22T09:00:00.000Z	33 \| good	5.519 \| good	22.855 \| good	30.606 \| good	0.598 \| good	8.216 \| good	0.291 \| good
2026-10-22T10:00:00.000Z	33 \| good	5.811 \| good	17.19 \| good	29.023 \| good	0.55 \| good	8.407 \| good	0.366 \| good
2026-10-22T11:00:00.000Z	38 \| good	7.254 \| good	31.175 \| good	27.693 \| good	0.508 \| good	8.052 \| good	0.414 \| good
2026-10-22T12:00:00.000Z	33 \| good	5.87 \| good	30.386 \| good	27.379 \| good	0.528 \| good	6.302 \| good	0.414 \| good
2026-10-22T13:00:00.000Z	28 \| good	4.362 \| good	16.102 \| good	29.819 \| good	1.308 \| good	9.847 \| good	0.353 \| good
2026-10-22T14:00:00.000Z	28 \| good	3.784 \| good	22.18 \| good	29.909 \| good	0.753 \| good	11.053 \| good	0.293 \| good
2026-10-22T15:00:00.000Z	27 \| good	5.185 \| good	20.029 \| good	24.378 \| good	0.673 \| good	11.441 \| good	0.312 \| good
2026-10-22T16:00:00.000Z	27 \| good	4.825 \| good	16.271 \| good	27.534 \| good	0.632 \| good	10.248 \| good	0.323 \| good
2026-10-22T17:00:00.000Z	38 \| good	6.711 \| good	20.103 \| good	28.08 \| good	0.637 \| good	8.883 \| good	0.342 \| good
2026-10-22T18:00:00.000Z	52 \| moderate	10.146 \| good	36.386 \| good	26.729 \| good	0.584 \| good	9.121 \| good	0.308 \| good
2026-10-22T19:00:00.000Z	38 \| good	6.746 \| good	21.936 \| good	27.376 \| good	0.625 \| good	7.634 \| good	0.35 \| good
2026-10-22T20:00:00.000Z	33 \| good	5.905 \| good	28.812 \| good	31.064 \| good	0.753 \| good	6.794 \| good	0.383 \| good
2026-10-22T21:00:00.000Z	33 \| good	6.229 \| good	28.299 \| good	32.272 \| good	0.612 \| good	7.356 \| good	0.343 \| good
2026-10-22T22:00:00.000Z	38 \| good	6.835 \| good	32.64 \| good	33.138 \| good	0.635 \| good	7.042 \| good	0.342 \| good
2026-10-22T22:00:00.000Z	38 \| good	6.746 \| good	32.066 \| good	33.019 \| good	0.635 \| good	7.035 \| good	0.342 \| good
2026-10-22T23:00:00.000Z	38 \| good	3.641 \| good	15.831 \| good	40.991 \| good	0.107 \| good	0.993 \| good	0.119 \| good
2026-10-23T00:00:00.000Z	38 \| good	2.482 \| good	10.004 \| good	41.485 \| good	0.129 \| good	1.245 \| good	0.119 \| good
2026-10-23T01:00:00.000Z	38 \| good	1.939 \| good	8.016 \| good	41.403 \| good	0.152 \| good	1.968 \| good	0.123 \| good
2026-10-23T02:00:00.000Z	36 \| good	2.085 \| good	8.521 \| good	39.414 \| good	0.146 \| good	2.776 \| good	0.128 \| good
2026-10-23T03:00:00.000Z	35 \| good	1.966 \| good	8.293 \| good	37.558 \| good	0.135 \| good	2.847 \| good	0.128 \| good
2026-10-23T04:00:00.000Z	36 \| good	1.939 \| good	7.932 \| good	39.009 \| good	0.137 \| good	2.603 \| good	0.126 \| good
2026-10-23T05:00:00.000Z	37 \| good	2.31 \| good	9.42 \| good	40.126 \| good	0.154 \| good	2.621 \| good	0.127 \| good
2026-10-23T06:00:00.000Z	38 \| good	1.958 \| good	7.899 \| good	41.274 \| good	0.182 \| good	2.615 \| good	0.129 \| good
2026-10-23T07:00:00.000Z	38 \| good	1.588 \| good	6.45 \| good	40.845 \| good	0.191 \| good	2.905 \| good	0.133 \| good
2026-10-23T08:00:00.000Z	37 \| good	1.364 \| good	5.032 \| good	40.015 \| good	0.209 \| good	2.948 \| good	0.135 \| good
2026-10-23T09:00:00.000Z	37 \| good	1.422 \| good	5.487 \| good	39.99 \| good	0.24 \| good	3.085 \| good	0.138 \| good
2026-10-23T10:00:00.000Z	36 \| good	1.422 \| good	5.45 \| good	38.564 \| good	0.255 \| good	3.405 \| good	0.142 \| good
2026-10-23T11:00:00.000Z	36 \| good	1.705 \| good	7.016 \| good	39.141 \| good	0.255 \| good	3.855 \| good	0.146 \| good
2026-10-23T12:00:00.000Z	38 \| good	1.899 \| good	7.633 \| good	40.633 \| good	0.243 \| good	4.641 \| good	0.151 \| good
2026-10-23T13:00:00.000Z	37 \| good	2.209 \| good	9.121 \| good	39.598 \| good	0.214 \| good	5.316 \| good	0.156 \| good
2026-10-23T14:00:00.000Z	36 \| good	2.329 \| good	9.766 \| good	39.244 \| good	0.219 \| good	5.805 \| good	0.163 \| good
2026-10-23T15:00:00.000Z	36 \| good	2.211 \| good	9.065 \| good	39.313 \| good	0.225 \| good	6.886 \| good	0.177 \| good
2026-10-23T16:00:00.000Z	36 \| good	2.603 \| good	10.9 \| good	38.865 \| good	0.233 \| good	4.601 \| good	0.174 \| good
2026-10-23T17:00:00.000Z	34 \| good	3.099 \| good	13.351 \| good	36.724 \| good	0.229 \| good	2.976 \| good	0.169 \| good
2026-10-23T18:00:00.000Z	35 \| good	3.06 \| good	13.006 \| good	38.354 \| good	0.198 \| good	1.924 \| good	0.16 \| good
2026-10-23T19:00:00.000Z	37 \| good	2.971 \| good	12.387 \| good	40.065 \| good	0.176 \| good	1.232 \| good	0.149 \| good
2026-10-23T20:00:00.000Z	38 \| good	3.175 \| good	13.451 \| good	41.278 \| good	0.156 \| good	0.755 \| good	0.139 \| good
2026-10-23T21:00:00.000Z	39 \| good	3.129 \| good	13.299 \| good	42.158 \| good	0.143 \| good	0.513 \| good	0.13 \| good
2026-10-23T22:00:00.000Z	41 \| good	2.998 \| good	12.968 \| good	43.779 \| good	0.146 \| good	0.436 \| good	0.126 \| good
2026-10-23T23:00:00.000Z	44 \| good	3.177 \| good	13.348 \| good	46.815 \| good	0.16 \| good	0.455 \| good	0.123 \| good
2026-10-24T00:00:00.000Z	44 \| good	2.875 \| good	11.891 \| good	48.245 \| good	0.178 \| good	0.596 \| good	0.123 \| good
2026-10-24T01:00:00.000Z	43 \| good	2.893 \| good	11.856 \| good	46.209 \| good	0.193 \| good	1.268 \| good	0.129 \| good
2026-10-24T02:00:00.000Z	42 \| good	2.901 \| good	11.896 \| good	44.944 \| good	0.205 \| good	2.131 \| good	0.135 \| good
2026-10-24T03:00:00.000Z	40 \| good	2.923 \| good	12.213 \| good	42.637 \| good	0.2 \| good	2.374 \| good	0.135 \| good
2026-10-24T04:00:00.000Z	41 \| good	2.642 \| good	11.004 \| good	44.129 \| good	0.18 \| good	2.281 \| good	0.13 \| good
2026-10-24T05:00:00.000Z	41 \| good	2.756 \| good	11.366 \| good	44.187 \| good	0.168 \| good	2.017 \| good	0.123 \| good
2026-10-24T06:00:00.000Z	39 \| good	2.691 \| good	10.97 \| good	42.192 \| good	0.168 \| good	1.752 \| good	0.12 \| good
2026-10-24T07:00:00.000Z	38 \| good	2.551 \| good	10.48 \| good	40.723 \| good	0.172 \| good	1.511 \| good	0.119 \| good
2026-10-24T08:00:00.000Z	36 \| good	2.527 \| good	10.205 \| good	39.025 \| good	0.177 \| good	1.423 \| good	0.119 \| good
2026-10-24T09:00:00.000Z	35 \| good	2.775 \| good	11.247 \| good	37.79 \| good	0.184 \| good	1.435 \| good	0.119 \| good
2026-10-24T10:00:00.000Z	35 \| good	3.017 \| good	12.622 \| good	38.222 \| good	0.187 \| good	1.556 \| good	0.119 \| good
2026-10-24T11:00:00.000Z	36 \| good	3.262 \| good	14.106 \| good	39.061 \| good	0.188 \| good	1.764 \| good	0.12 \| good
2026-10-24T12:00:00.000Z	38 \| good	3.51 \| good	15.496 \| good	41.033 \| good	0.186 \| good	1.992 \| good	0.121 \| good
2026-10-24T13:00:00.000Z	37 \| good	3.549 \| good	15.564 \| good	40.137 \| good	0.184 \| good	2.298 \| good	0.123 \| good
2026-10-24T14:00:00.000Z	37 \| good	3.552 \| good	15.381 \| good	39.807 \| good	0.184 \| good	2.783 \| good	0.126 \| good
2026-10-24T15:00:00.000Z	37 \| good	3.626 \| good	16.133 \| good	40.047 \| good	0.189 \| good	3.234 \| good	0.131 \| good
2026-10-24T16:00:00.000Z	36 \| good	4.165 \| good	18.207 \| good	39.305 \| good	0.186 \| good	2.628 \| good	0.134 \| good
2026-10-24T17:00:00.000Z	37 \| good	4.04 \| good	17.909 \| good	40.461 \| good	0.202 \| good	1.674 \| good	0.129 \| good
2026-10-24T18:00:00.000Z	44 \| good	3.643 \| good	16.05 \| good	46.577 \| good	0.208 \| good	1.188 \| good	0.125 \| good
2026-10-24T19:00:00.000Z	44 \| good	3.094 \| good	13.035 \| good	47.368 \| good	0.204 \| good	1.095 \| good	0.125 \| good
2026-10-24T20:00:00.000Z	43 \| good	3.272 \| good	13.799 \| good	45.806 \| good	0.206 \| good	0.942 \| good	0.125 \| good
2026-10-24T21:00:00.000Z	39 \| good	3.111 \| good	12.997 \| good	41.96 \| good	0.207 \| good	0.783 \| good	0.125 \| good
2026-10-24T22:00:00.000Z	35 \| good	3.461 \| good	15.256 \| good	38.271 \| good	0.208 \| good	0.688 \| good	0.126 \| good

Grass Valley

Get reliable air quality data to drive your business

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

0.45ppm

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

Air quality levels in US

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

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

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 10:00:00 on 2026-10-21.

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 2026-10-22.

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

As of now, the AQI in Grass Valley, California is 38, 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 6.746 μg/m³.

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

The PM₁₀ concentration in Grass Valley, California is 32.066 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 0.342 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 0.635 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 33.019 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 7.035 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T23:00:00.000Z	39 \| good	6.769 \| good	29.246 \| good	42.265 \| good	0.585 \| good	2.896 \| good	0.252 \| good
2026-10-21T00:00:00.000Z	38 \| good	5.17 \| good	27.021 \| good	41.385 \| good	0.526 \| good	2.403 \| good	0.282 \| good
2026-10-21T01:00:00.000Z	37 \| good	5.438 \| good	22.793 \| good	40.375 \| good	0.63 \| good	2.756 \| good	0.268 \| good
2026-10-21T02:00:00.000Z	37 \| good	6.29 \| good	24.941 \| good	40.068 \| good	0.573 \| good	5.493 \| good	0.386 \| good
2026-10-21T03:00:00.000Z	34 \| good	6.093 \| good	27.045 \| good	37.223 \| good	0.277 \| good	5.561 \| good	0.175 \| good
2026-10-21T04:00:00.000Z	35 \| good	6.192 \| good	31.695 \| good	37.652 \| good	0.586 \| good	10.456 \| good	0.402 \| good
2026-10-21T05:00:00.000Z	38 \| good	7.394 \| good	34.38 \| good	39.19 \| good	0.584 \| good	10.349 \| good	0.432 \| good
2026-10-21T06:00:00.000Z	38 \| good	6.955 \| good	36.725 \| good	39.791 \| good	0.715 \| good	7.392 \| good	0.414 \| good
2026-10-21T07:00:00.000Z	58 \| moderate	12.589 \| fine	47.586 \| good	38.798 \| good	0.566 \| good	7.499 \| good	0.415 \| good
2026-10-21T08:00:00.000Z	49 \| good	9.442 \| good	37.549 \| good	38.831 \| good	0.6 \| good	6.804 \| good	0.381 \| good
2026-10-21T09:00:00.000Z	44 \| good	8.336 \| good	43.702 \| good	39.667 \| good	0.675 \| good	9.789 \| good	0.472 \| good
2026-10-21T10:00:00.000Z	39 \| good	6.787 \| good	30.991 \| good	42.442 \| good	0.563 \| good	9.307 \| good	0.406 \| good
2026-10-21T11:00:00.000Z	40 \| good	6.892 \| good	29.51 \| good	43.176 \| good	0.563 \| good	7.421 \| good	0.378 \| good
2026-10-21T12:00:00.000Z	38 \| good	6.126 \| good	30.852 \| good	41.195 \| good	0.584 \| good	5.584 \| good	0.428 \| good
2026-10-21T13:00:00.000Z	41 \| good	6.439 \| good	22.458 \| good	43.704 \| good	0.682 \| good	6.259 \| good	0.382 \| good
2026-10-21T14:00:00.000Z	49 \| good	9.104 \| good	26.977 \| good	42.739 \| good	0.802 \| good	6.1 \| good	0.379 \| good
2026-10-21T15:00:00.000Z	49 \| good	8.815 \| good	28.383 \| good	41.147 \| good	0.764 \| good	7.748 \| good	0.428 \| good
2026-10-21T16:00:00.000Z	42 \| good	7.009 \| good	44.805 \| good	41.148 \| good	0.775 \| good	12.165 \| good	0.341 \| good
2026-10-21T17:00:00.000Z	44 \| good	7.774 \| good	37.241 \| good	41.959 \| good	0.746 \| good	13.997 \| good	0.371 \| good
2026-10-21T18:00:00.000Z	49 \| good	9.406 \| good	39.422 \| good	38.523 \| good	0.755 \| good	16.861 \| good	0.374 \| good
2026-10-21T19:00:00.000Z	52 \| moderate	10.134 \| good	38.519 \| good	39.688 \| good	0.672 \| good	14.816 \| good	0.295 \| good
2026-10-21T20:00:00.000Z	54 \| moderate	10.901 \| good	46.014 \| good	39.256 \| good	0.571 \| good	14.953 \| good	0.328 \| good
2026-10-21T21:00:00.000Z	52 \| moderate	10.279 \| good	48.504 \| good	39.79 \| good	0.694 \| good	11.821 \| good	0.328 \| good
2026-10-21T22:00:00.000Z	54 \| moderate	11.326 \| good	46.037 \| good	39.784 \| good	0.65 \| good	12.215 \| good	0.414 \| good
2026-10-21T23:00:00.000Z	52 \| moderate	10.022 \| good	44.917 \| good	39.792 \| good	0.644 \| good	12.163 \| good	0.352 \| good
2026-10-22T00:00:00.000Z	49 \| good	9.156 \| good	45.885 \| good	39.547 \| good	0.622 \| good	7.408 \| good	0.332 \| good
2026-10-22T01:00:00.000Z	49 \| good	9.468 \| good	45.637 \| good	38.191 \| good	0.573 \| good	9.007 \| good	0.349 \| good
2026-10-22T02:00:00.000Z	38 \| good	7.379 \| good	23.093 \| good	36.098 \| good	0.582 \| good	6.793 \| good	0.383 \| good
2026-10-22T03:00:00.000Z	40 \| good	6.343 \| good	28.399 \| good	43.305 \| good	0.27 \| good	6.745 \| good	0.179 \| good
2026-10-22T04:00:00.000Z	52 \| moderate	9.593 \| good	31.712 \| good	35.568 \| good	0.613 \| good	6.263 \| good	0.432 \| good
2026-10-22T05:00:00.000Z	38 \| good	7.336 \| good	30.042 \| good	35.064 \| good	0.58 \| good	7.517 \| good	0.514 \| good
2026-10-22T06:00:00.000Z	33 \| good	5.873 \| good	27.281 \| good	33.824 \| good	0.598 \| good	8.192 \| good	0.428 \| good
2026-10-22T07:00:00.000Z	38 \| good	6.584 \| good	27.769 \| good	32.008 \| good	0.552 \| good	9.361 \| good	0.4 \| good
2026-10-22T08:00:00.000Z	44 \| good	7.956 \| good	31.397 \| good	31.899 \| good	0.586 \| good	7.817 \| good	0.38 \| good
2026-10-22T09:00:00.000Z	33 \| good	5.519 \| good	22.855 \| good	30.606 \| good	0.598 \| good	8.216 \| good	0.291 \| good
2026-10-22T10:00:00.000Z	33 \| good	5.811 \| good	17.19 \| good	29.023 \| good	0.55 \| good	8.407 \| good	0.366 \| good
2026-10-22T11:00:00.000Z	38 \| good	7.254 \| good	31.175 \| good	27.693 \| good	0.508 \| good	8.052 \| good	0.414 \| good
2026-10-22T12:00:00.000Z	33 \| good	5.87 \| good	30.386 \| good	27.379 \| good	0.528 \| good	6.302 \| good	0.414 \| good
2026-10-22T13:00:00.000Z	28 \| good	4.362 \| good	16.102 \| good	29.819 \| good	1.308 \| good	9.847 \| good	0.353 \| good
2026-10-22T14:00:00.000Z	28 \| good	3.784 \| good	22.18 \| good	29.909 \| good	0.753 \| good	11.053 \| good	0.293 \| good
2026-10-22T15:00:00.000Z	27 \| good	5.185 \| good	20.029 \| good	24.378 \| good	0.673 \| good	11.441 \| good	0.312 \| good
2026-10-22T16:00:00.000Z	27 \| good	4.825 \| good	16.271 \| good	27.534 \| good	0.632 \| good	10.248 \| good	0.323 \| good
2026-10-22T17:00:00.000Z	38 \| good	6.711 \| good	20.103 \| good	28.08 \| good	0.637 \| good	8.883 \| good	0.342 \| good
2026-10-22T18:00:00.000Z	52 \| moderate	10.146 \| good	36.386 \| good	26.729 \| good	0.584 \| good	9.121 \| good	0.308 \| good
2026-10-22T19:00:00.000Z	38 \| good	6.746 \| good	21.936 \| good	27.376 \| good	0.625 \| good	7.634 \| good	0.35 \| good
2026-10-22T20:00:00.000Z	33 \| good	5.905 \| good	28.812 \| good	31.064 \| good	0.753 \| good	6.794 \| good	0.383 \| good
2026-10-22T21:00:00.000Z	33 \| good	6.229 \| good	28.299 \| good	32.272 \| good	0.612 \| good	7.356 \| good	0.343 \| good
2026-10-22T22:00:00.000Z	38 \| good	6.835 \| good	32.64 \| good	33.138 \| good	0.635 \| good	7.042 \| good	0.342 \| good
2026-10-22T22:00:00.000Z	38 \| good	6.746 \| good	32.066 \| good	33.019 \| good	0.635 \| good	7.035 \| good	0.342 \| good
2026-10-22T23:00:00.000Z	38 \| good	3.641 \| good	15.831 \| good	40.991 \| good	0.107 \| good	0.993 \| good	0.119 \| good
2026-10-23T00:00:00.000Z	38 \| good	2.482 \| good	10.004 \| good	41.485 \| good	0.129 \| good	1.245 \| good	0.119 \| good
2026-10-23T01:00:00.000Z	38 \| good	1.939 \| good	8.016 \| good	41.403 \| good	0.152 \| good	1.968 \| good	0.123 \| good
2026-10-23T02:00:00.000Z	36 \| good	2.085 \| good	8.521 \| good	39.414 \| good	0.146 \| good	2.776 \| good	0.128 \| good
2026-10-23T03:00:00.000Z	35 \| good	1.966 \| good	8.293 \| good	37.558 \| good	0.135 \| good	2.847 \| good	0.128 \| good
2026-10-23T04:00:00.000Z	36 \| good	1.939 \| good	7.932 \| good	39.009 \| good	0.137 \| good	2.603 \| good	0.126 \| good
2026-10-23T05:00:00.000Z	37 \| good	2.31 \| good	9.42 \| good	40.126 \| good	0.154 \| good	2.621 \| good	0.127 \| good
2026-10-23T06:00:00.000Z	38 \| good	1.958 \| good	7.899 \| good	41.274 \| good	0.182 \| good	2.615 \| good	0.129 \| good
2026-10-23T07:00:00.000Z	38 \| good	1.588 \| good	6.45 \| good	40.845 \| good	0.191 \| good	2.905 \| good	0.133 \| good
2026-10-23T08:00:00.000Z	37 \| good	1.364 \| good	5.032 \| good	40.015 \| good	0.209 \| good	2.948 \| good	0.135 \| good
2026-10-23T09:00:00.000Z	37 \| good	1.422 \| good	5.487 \| good	39.99 \| good	0.24 \| good	3.085 \| good	0.138 \| good
2026-10-23T10:00:00.000Z	36 \| good	1.422 \| good	5.45 \| good	38.564 \| good	0.255 \| good	3.405 \| good	0.142 \| good
2026-10-23T11:00:00.000Z	36 \| good	1.705 \| good	7.016 \| good	39.141 \| good	0.255 \| good	3.855 \| good	0.146 \| good
2026-10-23T12:00:00.000Z	38 \| good	1.899 \| good	7.633 \| good	40.633 \| good	0.243 \| good	4.641 \| good	0.151 \| good
2026-10-23T13:00:00.000Z	37 \| good	2.209 \| good	9.121 \| good	39.598 \| good	0.214 \| good	5.316 \| good	0.156 \| good
2026-10-23T14:00:00.000Z	36 \| good	2.329 \| good	9.766 \| good	39.244 \| good	0.219 \| good	5.805 \| good	0.163 \| good
2026-10-23T15:00:00.000Z	36 \| good	2.211 \| good	9.065 \| good	39.313 \| good	0.225 \| good	6.886 \| good	0.177 \| good
2026-10-23T16:00:00.000Z	36 \| good	2.603 \| good	10.9 \| good	38.865 \| good	0.233 \| good	4.601 \| good	0.174 \| good
2026-10-23T17:00:00.000Z	34 \| good	3.099 \| good	13.351 \| good	36.724 \| good	0.229 \| good	2.976 \| good	0.169 \| good
2026-10-23T18:00:00.000Z	35 \| good	3.06 \| good	13.006 \| good	38.354 \| good	0.198 \| good	1.924 \| good	0.16 \| good
2026-10-23T19:00:00.000Z	37 \| good	2.971 \| good	12.387 \| good	40.065 \| good	0.176 \| good	1.232 \| good	0.149 \| good
2026-10-23T20:00:00.000Z	38 \| good	3.175 \| good	13.451 \| good	41.278 \| good	0.156 \| good	0.755 \| good	0.139 \| good
2026-10-23T21:00:00.000Z	39 \| good	3.129 \| good	13.299 \| good	42.158 \| good	0.143 \| good	0.513 \| good	0.13 \| good
2026-10-23T22:00:00.000Z	41 \| good	2.998 \| good	12.968 \| good	43.779 \| good	0.146 \| good	0.436 \| good	0.126 \| good
2026-10-23T23:00:00.000Z	44 \| good	3.177 \| good	13.348 \| good	46.815 \| good	0.16 \| good	0.455 \| good	0.123 \| good
2026-10-24T00:00:00.000Z	44 \| good	2.875 \| good	11.891 \| good	48.245 \| good	0.178 \| good	0.596 \| good	0.123 \| good
2026-10-24T01:00:00.000Z	43 \| good	2.893 \| good	11.856 \| good	46.209 \| good	0.193 \| good	1.268 \| good	0.129 \| good
2026-10-24T02:00:00.000Z	42 \| good	2.901 \| good	11.896 \| good	44.944 \| good	0.205 \| good	2.131 \| good	0.135 \| good
2026-10-24T03:00:00.000Z	40 \| good	2.923 \| good	12.213 \| good	42.637 \| good	0.2 \| good	2.374 \| good	0.135 \| good
2026-10-24T04:00:00.000Z	41 \| good	2.642 \| good	11.004 \| good	44.129 \| good	0.18 \| good	2.281 \| good	0.13 \| good
2026-10-24T05:00:00.000Z	41 \| good	2.756 \| good	11.366 \| good	44.187 \| good	0.168 \| good	2.017 \| good	0.123 \| good
2026-10-24T06:00:00.000Z	39 \| good	2.691 \| good	10.97 \| good	42.192 \| good	0.168 \| good	1.752 \| good	0.12 \| good
2026-10-24T07:00:00.000Z	38 \| good	2.551 \| good	10.48 \| good	40.723 \| good	0.172 \| good	1.511 \| good	0.119 \| good
2026-10-24T08:00:00.000Z	36 \| good	2.527 \| good	10.205 \| good	39.025 \| good	0.177 \| good	1.423 \| good	0.119 \| good
2026-10-24T09:00:00.000Z	35 \| good	2.775 \| good	11.247 \| good	37.79 \| good	0.184 \| good	1.435 \| good	0.119 \| good
2026-10-24T10:00:00.000Z	35 \| good	3.017 \| good	12.622 \| good	38.222 \| good	0.187 \| good	1.556 \| good	0.119 \| good
2026-10-24T11:00:00.000Z	36 \| good	3.262 \| good	14.106 \| good	39.061 \| good	0.188 \| good	1.764 \| good	0.12 \| good
2026-10-24T12:00:00.000Z	38 \| good	3.51 \| good	15.496 \| good	41.033 \| good	0.186 \| good	1.992 \| good	0.121 \| good
2026-10-24T13:00:00.000Z	37 \| good	3.549 \| good	15.564 \| good	40.137 \| good	0.184 \| good	2.298 \| good	0.123 \| good
2026-10-24T14:00:00.000Z	37 \| good	3.552 \| good	15.381 \| good	39.807 \| good	0.184 \| good	2.783 \| good	0.126 \| good
2026-10-24T15:00:00.000Z	37 \| good	3.626 \| good	16.133 \| good	40.047 \| good	0.189 \| good	3.234 \| good	0.131 \| good
2026-10-24T16:00:00.000Z	36 \| good	4.165 \| good	18.207 \| good	39.305 \| good	0.186 \| good	2.628 \| good	0.134 \| good
2026-10-24T17:00:00.000Z	37 \| good	4.04 \| good	17.909 \| good	40.461 \| good	0.202 \| good	1.674 \| good	0.129 \| good
2026-10-24T18:00:00.000Z	44 \| good	3.643 \| good	16.05 \| good	46.577 \| good	0.208 \| good	1.188 \| good	0.125 \| good
2026-10-24T19:00:00.000Z	44 \| good	3.094 \| good	13.035 \| good	47.368 \| good	0.204 \| good	1.095 \| good	0.125 \| good
2026-10-24T20:00:00.000Z	43 \| good	3.272 \| good	13.799 \| good	45.806 \| good	0.206 \| good	0.942 \| good	0.125 \| good
2026-10-24T21:00:00.000Z	39 \| good	3.111 \| good	12.997 \| good	41.96 \| good	0.207 \| good	0.783 \| good	0.125 \| good
2026-10-24T22:00:00.000Z	35 \| good	3.461 \| good	15.256 \| good	38.271 \| good	0.208 \| good	0.688 \| good	0.126 \| 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)

Track live Grass Valley, California air quality forecast and history

Get reliable air quality data to drive your business

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

How accurate is California, USA air quality data?

Air quality levels in US

Frequently asked questions

How often is air quality information updated for Grass Valley, California?

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

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

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

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

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

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

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

What is the carbon monoxide (CO) 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?

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?