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 0.429 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 40.274 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 2.97 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 4.392 μg/m3.

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

The PM10 concentration in Grass Valley, California is 18.896 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)

4.39 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

18.90 μg/m³

155

255

425

605+

Ozone (O₃)

40.27 ppb

201

201+

Sulfur Dioxide (SO₂)

0.43 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.97 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.18 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
2026-08-14T20:00:00.000Z	36 \| good	5.989 \| good	29.794 \| good	38.73 \| good	0.61 \| good	2.016 \| good	0.183 \| good
2026-08-14T21:00:00.000Z	35 \| good	2.959 \| good	19.37 \| good	38.297 \| good	0.617 \| good	2.016 \| good	0.197 \| good
2026-08-14T22:00:00.000Z	38 \| good	3.91 \| good	11.848 \| good	41.2 \| good	0.667 \| good	2.018 \| good	0.198 \| good
2026-08-14T23:00:00.000Z	39 \| good	4.257 \| good	17.19 \| good	42.296 \| good	0.634 \| good	2.023 \| good	0.184 \| good
2026-08-15T00:00:00.000Z	39 \| good	4.576 \| good	17.507 \| good	41.638 \| good	0.448 \| good	2.05 \| good	0.212 \| good
2026-08-15T01:00:00.000Z	38 \| good	4.389 \| good	13.678 \| good	41.466 \| good	0.574 \| good	2.405 \| good	0.212 \| good
2026-08-15T02:00:00.000Z	38 \| good	3.835 \| good	17.297 \| good	41.446 \| good	0.687 \| good	2.354 \| good	0.212 \| good
2026-08-15T03:00:00.000Z	38 \| good	4.385 \| good	16.531 \| good	41.403 \| good	0.705 \| good	2.391 \| good	0.184 \| good
2026-08-15T04:00:00.000Z	39 \| good	4.439 \| good	17.623 \| good	42.126 \| good	0.791 \| good	2.535 \| good	0.184 \| good
2026-08-15T05:00:00.000Z	39 \| good	5.05 \| good	22.526 \| good	41.847 \| good	0.48 \| good	2.3 \| good	0.15 \| good
2026-08-15T06:00:00.000Z	37 \| good	5.266 \| good	24.793 \| good	39.666 \| good	0.462 \| good	2.081 \| good	0.134 \| good
2026-08-15T07:00:00.000Z	36 \| good	4.956 \| good	28.188 \| good	39.309 \| good	0.362 \| good	2.555 \| good	0.134 \| good
2026-08-15T08:00:00.000Z	36 \| good	4.928 \| good	20.921 \| good	38.658 \| good	0.426 \| good	2.322 \| good	0.15 \| good
2026-08-15T09:00:00.000Z	34 \| good	5.353 \| good	20.16 \| good	36.819 \| good	0.426 \| good	2.339 \| good	0.15 \| good
2026-08-15T10:00:00.000Z	32 \| good	5.225 \| good	16.602 \| good	34.916 \| good	0.705 \| good	1.735 \| good	0.109 \| good
2026-08-15T11:00:00.000Z	32 \| good	4.53 \| good	13.513 \| good	34.783 \| good	0.658 \| good	2.259 \| good	0.109 \| good
2026-08-15T12:00:00.000Z	31 \| good	4.417 \| good	18.161 \| good	33.566 \| good	0.506 \| good	2.263 \| good	0.109 \| good
2026-08-15T13:00:00.000Z	31 \| good	4.575 \| good	19.84 \| good	33.691 \| good	0.456 \| good	2.576 \| good	0.145 \| good
2026-08-15T14:00:00.000Z	31 \| good	5.114 \| good	15.45 \| good	33.546 \| good	0.382 \| good	1.995 \| good	0.15 \| good
2026-08-15T15:00:00.000Z	31 \| good	5.485 \| good	22.018 \| good	33.037 \| good	0.389 \| good	2.13 \| good	0.12 \| good
2026-08-15T16:00:00.000Z	31 \| good	4.937 \| good	19.456 \| good	34.119 \| good	0.433 \| good	2.218 \| good	0.134 \| good
2026-08-15T17:00:00.000Z	33 \| good	5.601 \| good	22.512 \| good	35.238 \| good	0.414 \| good	1.802 \| good	0.15 \| good
2026-08-15T18:00:00.000Z	32 \| good	5.078 \| good	22.424 \| good	34.778 \| good	0.407 \| good	2.04 \| good	0.184 \| good
2026-08-15T19:00:00.000Z	33 \| good	6.218 \| good	21.261 \| good	36.273 \| good	0.487 \| good	1.783 \| good	0.17 \| good
2026-08-15T20:00:00.000Z	38 \| good	7.093 \| good	30.368 \| good	38.467 \| good	0.462 \| good	1.795 \| good	0.184 \| good
2026-08-15T21:00:00.000Z	37 \| good	5.713 \| good	20.302 \| good	39.791 \| good	0.421 \| good	2.008 \| good	0.168 \| good
2026-08-15T22:00:00.000Z	37 \| good	5.455 \| good	21.278 \| good	40.123 \| good	0.527 \| good	2.131 \| good	0.15 \| good
2026-08-15T23:00:00.000Z	39 \| good	4.807 \| good	20.389 \| good	42.154 \| good	0.482 \| good	2.24 \| good	0.184 \| good
2026-08-16T00:00:00.000Z	39 \| good	4.344 \| good	20.563 \| good	42.327 \| good	0.461 \| good	2.304 \| good	0.184 \| good
2026-08-16T01:00:00.000Z	40 \| good	4.136 \| good	31.768 \| good	43.227 \| good	0.486 \| good	2.365 \| good	0.184 \| good
2026-08-16T02:00:00.000Z	40 \| good	3.289 \| good	17.094 \| good	43.23 \| good	0.461 \| good	2.304 \| good	0.184 \| good
2026-08-16T03:00:00.000Z	40 \| good	3.361 \| good	12.816 \| good	43.242 \| good	0.418 \| good	2.769 \| good	0.218 \| good
2026-08-16T04:00:00.000Z	39 \| good	4.618 \| good	22.143 \| good	42.071 \| good	0.357 \| good	3.528 \| good	0.218 \| good
2026-08-16T05:00:00.000Z	38 \| good	4.341 \| good	18.183 \| good	40.784 \| good	0.407 \| good	4.208 \| good	0.218 \| good
2026-08-16T06:00:00.000Z	44 \| good	8.082 \| good	28.689 \| good	39.317 \| good	0.369 \| good	3.154 \| good	0.184 \| good
2026-08-16T07:00:00.000Z	38 \| good	4.011 \| good	20.806 \| good	40.921 \| good	0.389 \| good	2.65 \| good	0.184 \| good
2026-08-16T08:00:00.000Z	38 \| good	6.743 \| good	23.584 \| good	41.157 \| good	0.346 \| good	2.817 \| good	0.15 \| good
2026-08-16T09:00:00.000Z	37 \| good	5.414 \| good	22.872 \| good	39.995 \| good	0.346 \| good	2.505 \| good	0.15 \| good
2026-08-16T10:00:00.000Z	36 \| good	4.624 \| good	14.434 \| good	39.1 \| good	0.649 \| good	2.505 \| good	0.107 \| good
2026-08-16T11:00:00.000Z	33 \| good	4.911 \| good	14.995 \| good	36.414 \| good	0.612 \| good	2.628 \| good	0.107 \| good
2026-08-16T12:00:00.000Z	34 \| good	3.92 \| good	20.333 \| good	37.16 \| good	0.6 \| good	2.782 \| good	0.107 \| good
2026-08-16T13:00:00.000Z	34 \| good	4.198 \| good	18.291 \| good	37.114 \| good	0.396 \| good	3.199 \| good	0.15 \| good
2026-08-16T14:00:00.000Z	38 \| good	6.536 \| good	21.21 \| good	38.998 \| good	0.386 \| good	3.357 \| good	0.15 \| good
2026-08-16T15:00:00.000Z	38 \| good	5.142 \| good	21.758 \| good	40.616 \| good	0.336 \| good	3.703 \| good	0.15 \| good
2026-08-16T16:00:00.000Z	37 \| good	4.212 \| good	13.179 \| good	40.119 \| good	0.375 \| good	2.654 \| good	0.184 \| good
2026-08-16T17:00:00.000Z	38 \| good	5.336 \| good	16.646 \| good	40.699 \| good	0.425 \| good	2.74 \| good	0.218 \| good
2026-08-16T18:00:00.000Z	37 \| good	4.394 \| good	18.876 \| good	40.323 \| good	0.429 \| good	2.97 \| good	0.184 \| good
2026-08-16T19:00:00.000Z	37 \| good	4.392 \| good	18.896 \| good	40.274 \| good	0.429 \| good	2.97 \| good	0.184 \| good
2026-08-16T20:00:00.000Z	35 \| good	5.303 \| good	22.723 \| good	38.15 \| good	0.326 \| good	0.506 \| good	0.113 \| good
2026-08-16T21:00:00.000Z	37 \| good	5.185 \| good	22.241 \| good	40.035 \| good	0.282 \| good	0.4 \| good	0.108 \| good
2026-08-16T22:00:00.000Z	39 \| good	4.855 \| good	21.05 \| good	42.357 \| good	0.253 \| good	0.352 \| good	0.106 \| good
2026-08-16T23:00:00.000Z	41 \| good	5.001 \| good	21.855 \| good	43.87 \| good	0.233 \| good	0.335 \| good	0.104 \| good
2026-08-17T00:00:00.000Z	39 \| good	5.348 \| good	23.127 \| good	41.646 \| good	0.222 \| good	0.35 \| good	0.102 \| good
2026-08-17T01:00:00.000Z	38 \| good	5.389 \| good	23.038 \| good	40.851 \| good	0.217 \| good	0.447 \| good	0.102 \| good
2026-08-17T02:00:00.000Z	36 \| good	5.969 \| good	26.015 \| good	38.754 \| good	0.22 \| good	1.027 \| good	0.107 \| good
2026-08-17T03:00:00.000Z	37 \| good	5.823 \| good	25.203 \| good	39.809 \| good	0.25 \| good	3.083 \| good	0.121 \| good
2026-08-17T04:00:00.000Z	37 \| good	6.247 \| good	28.022 \| good	40.079 \| good	0.29 \| good	4.241 \| good	0.128 \| good
2026-08-17T05:00:00.000Z	36 \| good	5.823 \| good	25.494 \| good	39.411 \| good	0.324 \| good	5.279 \| good	0.134 \| good
2026-08-17T06:00:00.000Z	37 \| good	5.917 \| good	25.905 \| good	39.686 \| good	0.356 \| good	6.194 \| good	0.139 \| good
2026-08-17T07:00:00.000Z	36 \| good	5.635 \| good	24.549 \| good	39.227 \| good	0.374 \| good	6.797 \| good	0.141 \| good
2026-08-17T08:00:00.000Z	37 \| good	5.453 \| good	23.751 \| good	39.568 \| good	0.377 \| good	7.196 \| good	0.142 \| good
2026-08-17T09:00:00.000Z	36 \| good	5.804 \| good	25.332 \| good	38.782 \| good	0.367 \| good	7.612 \| good	0.142 \| good
2026-08-17T10:00:00.000Z	37 \| good	5.578 \| good	24.529 \| good	39.843 \| good	0.34 \| good	8.165 \| good	0.143 \| good
2026-08-17T11:00:00.000Z	37 \| good	5.509 \| good	23.759 \| good	39.982 \| good	0.314 \| good	8.795 \| good	0.143 \| good
2026-08-17T12:00:00.000Z	36 \| good	5.108 \| good	22.234 \| good	38.627 \| good	0.3 \| good	9.294 \| good	0.144 \| good
2026-08-17T13:00:00.000Z	37 \| good	5.798 \| good	25.306 \| good	39.573 \| good	0.305 \| good	9.63 \| good	0.145 \| good
2026-08-17T14:00:00.000Z	33 \| good	5.6 \| good	24.025 \| good	35.785 \| good	0.316 \| good	9.217 \| good	0.146 \| good
2026-08-17T15:00:00.000Z	33 \| good	6.224 \| good	27.753 \| good	32.967 \| good	0.316 \| good	8.234 \| good	0.152 \| good
2026-08-17T16:00:00.000Z	35 \| good	6.346 \| good	28.275 \| good	38.219 \| good	0.41 \| good	4.267 \| good	0.133 \| good
2026-08-17T17:00:00.000Z	40 \| good	6.136 \| good	27.228 \| good	42.588 \| good	0.435 \| good	2.726 \| good	0.129 \| good
2026-08-17T18:00:00.000Z	41 \| good	6.171 \| good	27.232 \| good	43.688 \| good	0.454 \| good	1.795 \| good	0.128 \| good
2026-08-17T19:00:00.000Z	43 \| good	7.285 \| good	32.217 \| good	46.157 \| good	0.458 \| good	1.202 \| good	0.126 \| good
2026-08-17T20:00:00.000Z	45 \| good	8.094 \| good	35.46 \| good	49.228 \| good	0.445 \| good	0.821 \| good	0.122 \| good
2026-08-17T21:00:00.000Z	49 \| good	8.563 \| good	37.823 \| good	48.385 \| good	0.394 \| good	0.569 \| good	0.115 \| good
2026-08-17T22:00:00.000Z	44 \| good	7.949 \| good	34.761 \| good	45.485 \| good	0.333 \| good	0.431 \| good	0.108 \| good
2026-08-17T23:00:00.000Z	40 \| good	7.355 \| good	32.429 \| good	43.131 \| good	0.307 \| good	0.381 \| good	0.107 \| good
2026-08-18T00:00:00.000Z	40 \| good	6.972 \| good	30.861 \| good	43.346 \| good	0.291 \| good	0.389 \| good	0.106 \| good
2026-08-18T01:00:00.000Z	41 \| good	6.795 \| good	30.21 \| good	44.106 \| good	0.283 \| good	0.498 \| good	0.106 \| good
2026-08-18T02:00:00.000Z	38 \| good	6.108 \| good	26.559 \| good	41.177 \| good	0.287 \| good	1.102 \| good	0.11 \| good
2026-08-18T03:00:00.000Z	36 \| good	5.455 \| good	23.558 \| good	39.298 \| good	0.316 \| good	2.996 \| good	0.124 \| good
2026-08-18T04:00:00.000Z	36 \| good	6.291 \| good	28.057 \| good	39.327 \| good	0.368 \| good	4.016 \| good	0.131 \| good
2026-08-18T05:00:00.000Z	35 \| good	6.364 \| good	28.338 \| good	37.582 \| good	0.414 \| good	4.952 \| good	0.137 \| good
2026-08-18T06:00:00.000Z	38 \| good	7.124 \| good	31.694 \| good	39.202 \| good	0.441 \| good	6.083 \| good	0.144 \| good
2026-08-18T07:00:00.000Z	40 \| good	7.469 \| good	32.471 \| good	42.924 \| good	0.448 \| good	7.203 \| good	0.15 \| good
2026-08-18T08:00:00.000Z	44 \| good	7.644 \| good	33.55 \| good	43.298 \| good	0.432 \| good	8.237 \| good	0.155 \| good
2026-08-18T09:00:00.000Z	44 \| good	7.86 \| good	34.761 \| good	41.781 \| good	0.41 \| good	9.033 \| good	0.157 \| good
2026-08-18T10:00:00.000Z	41 \| good	6.613 \| good	29.445 \| good	43.557 \| good	0.409 \| good	9.598 \| good	0.157 \| good
2026-08-18T11:00:00.000Z	40 \| good	5.794 \| good	25.595 \| good	42.929 \| good	0.432 \| good	9.844 \| good	0.156 \| good
2026-08-18T12:00:00.000Z	40 \| good	4.764 \| good	20.648 \| good	42.864 \| good	0.437 \| good	10.297 \| good	0.157 \| good
2026-08-18T13:00:00.000Z	40 \| good	4.544 \| good	19.635 \| good	43.001 \| good	0.434 \| good	10.797 \| good	0.158 \| good
2026-08-18T14:00:00.000Z	36 \| good	3.891 \| good	16.843 \| good	38.689 \| good	0.432 \| good	10.833 \| good	0.159 \| good
2026-08-18T15:00:00.000Z	33 \| good	4.176 \| good	18.237 \| good	35.841 \| good	0.404 \| good	9.396 \| good	0.169 \| good
2026-08-18T16:00:00.000Z	34 \| good	4.277 \| good	18.466 \| good	36.936 \| good	0.474 \| good	4.102 \| good	0.146 \| good
2026-08-18T17:00:00.000Z	39 \| good	4.469 \| good	19.514 \| good	41.774 \| good	0.472 \| good	2.509 \| good	0.138 \| good
2026-08-18T18:00:00.000Z	40 \| good	4.847 \| good	21.149 \| good	43.422 \| good	0.482 \| good	1.77 \| good	0.139 \| good
2026-08-18T19:00:00.000Z	41 \| good	5.275 \| good	23.078 \| good	44.391 \| good	0.48 \| good	1.181 \| good	0.136 \| 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 06:00:00 on 2026-08-16.

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 11:00:00 on 2026-08-16.

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

As of now, the AQI in Grass Valley, California is 37, indicating Good conditions.

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

Grass Valley, California air has the highest levels of O3.

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 4.392 μg/m³.

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

The PM₁₀ concentration in Grass Valley, California is 18.896 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 0.184 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 0.429 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 40.274 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 2.97 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-08-14T20:00:00.000Z	36 \| good	5.989 \| good	29.794 \| good	38.73 \| good	0.61 \| good	2.016 \| good	0.183 \| good
2026-08-14T21:00:00.000Z	35 \| good	2.959 \| good	19.37 \| good	38.297 \| good	0.617 \| good	2.016 \| good	0.197 \| good
2026-08-14T22:00:00.000Z	38 \| good	3.91 \| good	11.848 \| good	41.2 \| good	0.667 \| good	2.018 \| good	0.198 \| good
2026-08-14T23:00:00.000Z	39 \| good	4.257 \| good	17.19 \| good	42.296 \| good	0.634 \| good	2.023 \| good	0.184 \| good
2026-08-15T00:00:00.000Z	39 \| good	4.576 \| good	17.507 \| good	41.638 \| good	0.448 \| good	2.05 \| good	0.212 \| good
2026-08-15T01:00:00.000Z	38 \| good	4.389 \| good	13.678 \| good	41.466 \| good	0.574 \| good	2.405 \| good	0.212 \| good
2026-08-15T02:00:00.000Z	38 \| good	3.835 \| good	17.297 \| good	41.446 \| good	0.687 \| good	2.354 \| good	0.212 \| good
2026-08-15T03:00:00.000Z	38 \| good	4.385 \| good	16.531 \| good	41.403 \| good	0.705 \| good	2.391 \| good	0.184 \| good
2026-08-15T04:00:00.000Z	39 \| good	4.439 \| good	17.623 \| good	42.126 \| good	0.791 \| good	2.535 \| good	0.184 \| good
2026-08-15T05:00:00.000Z	39 \| good	5.05 \| good	22.526 \| good	41.847 \| good	0.48 \| good	2.3 \| good	0.15 \| good
2026-08-15T06:00:00.000Z	37 \| good	5.266 \| good	24.793 \| good	39.666 \| good	0.462 \| good	2.081 \| good	0.134 \| good
2026-08-15T07:00:00.000Z	36 \| good	4.956 \| good	28.188 \| good	39.309 \| good	0.362 \| good	2.555 \| good	0.134 \| good
2026-08-15T08:00:00.000Z	36 \| good	4.928 \| good	20.921 \| good	38.658 \| good	0.426 \| good	2.322 \| good	0.15 \| good
2026-08-15T09:00:00.000Z	34 \| good	5.353 \| good	20.16 \| good	36.819 \| good	0.426 \| good	2.339 \| good	0.15 \| good
2026-08-15T10:00:00.000Z	32 \| good	5.225 \| good	16.602 \| good	34.916 \| good	0.705 \| good	1.735 \| good	0.109 \| good
2026-08-15T11:00:00.000Z	32 \| good	4.53 \| good	13.513 \| good	34.783 \| good	0.658 \| good	2.259 \| good	0.109 \| good
2026-08-15T12:00:00.000Z	31 \| good	4.417 \| good	18.161 \| good	33.566 \| good	0.506 \| good	2.263 \| good	0.109 \| good
2026-08-15T13:00:00.000Z	31 \| good	4.575 \| good	19.84 \| good	33.691 \| good	0.456 \| good	2.576 \| good	0.145 \| good
2026-08-15T14:00:00.000Z	31 \| good	5.114 \| good	15.45 \| good	33.546 \| good	0.382 \| good	1.995 \| good	0.15 \| good
2026-08-15T15:00:00.000Z	31 \| good	5.485 \| good	22.018 \| good	33.037 \| good	0.389 \| good	2.13 \| good	0.12 \| good
2026-08-15T16:00:00.000Z	31 \| good	4.937 \| good	19.456 \| good	34.119 \| good	0.433 \| good	2.218 \| good	0.134 \| good
2026-08-15T17:00:00.000Z	33 \| good	5.601 \| good	22.512 \| good	35.238 \| good	0.414 \| good	1.802 \| good	0.15 \| good
2026-08-15T18:00:00.000Z	32 \| good	5.078 \| good	22.424 \| good	34.778 \| good	0.407 \| good	2.04 \| good	0.184 \| good
2026-08-15T19:00:00.000Z	33 \| good	6.218 \| good	21.261 \| good	36.273 \| good	0.487 \| good	1.783 \| good	0.17 \| good
2026-08-15T20:00:00.000Z	38 \| good	7.093 \| good	30.368 \| good	38.467 \| good	0.462 \| good	1.795 \| good	0.184 \| good
2026-08-15T21:00:00.000Z	37 \| good	5.713 \| good	20.302 \| good	39.791 \| good	0.421 \| good	2.008 \| good	0.168 \| good
2026-08-15T22:00:00.000Z	37 \| good	5.455 \| good	21.278 \| good	40.123 \| good	0.527 \| good	2.131 \| good	0.15 \| good
2026-08-15T23:00:00.000Z	39 \| good	4.807 \| good	20.389 \| good	42.154 \| good	0.482 \| good	2.24 \| good	0.184 \| good
2026-08-16T00:00:00.000Z	39 \| good	4.344 \| good	20.563 \| good	42.327 \| good	0.461 \| good	2.304 \| good	0.184 \| good
2026-08-16T01:00:00.000Z	40 \| good	4.136 \| good	31.768 \| good	43.227 \| good	0.486 \| good	2.365 \| good	0.184 \| good
2026-08-16T02:00:00.000Z	40 \| good	3.289 \| good	17.094 \| good	43.23 \| good	0.461 \| good	2.304 \| good	0.184 \| good
2026-08-16T03:00:00.000Z	40 \| good	3.361 \| good	12.816 \| good	43.242 \| good	0.418 \| good	2.769 \| good	0.218 \| good
2026-08-16T04:00:00.000Z	39 \| good	4.618 \| good	22.143 \| good	42.071 \| good	0.357 \| good	3.528 \| good	0.218 \| good
2026-08-16T05:00:00.000Z	38 \| good	4.341 \| good	18.183 \| good	40.784 \| good	0.407 \| good	4.208 \| good	0.218 \| good
2026-08-16T06:00:00.000Z	44 \| good	8.082 \| good	28.689 \| good	39.317 \| good	0.369 \| good	3.154 \| good	0.184 \| good
2026-08-16T07:00:00.000Z	38 \| good	4.011 \| good	20.806 \| good	40.921 \| good	0.389 \| good	2.65 \| good	0.184 \| good
2026-08-16T08:00:00.000Z	38 \| good	6.743 \| good	23.584 \| good	41.157 \| good	0.346 \| good	2.817 \| good	0.15 \| good
2026-08-16T09:00:00.000Z	37 \| good	5.414 \| good	22.872 \| good	39.995 \| good	0.346 \| good	2.505 \| good	0.15 \| good
2026-08-16T10:00:00.000Z	36 \| good	4.624 \| good	14.434 \| good	39.1 \| good	0.649 \| good	2.505 \| good	0.107 \| good
2026-08-16T11:00:00.000Z	33 \| good	4.911 \| good	14.995 \| good	36.414 \| good	0.612 \| good	2.628 \| good	0.107 \| good
2026-08-16T12:00:00.000Z	34 \| good	3.92 \| good	20.333 \| good	37.16 \| good	0.6 \| good	2.782 \| good	0.107 \| good
2026-08-16T13:00:00.000Z	34 \| good	4.198 \| good	18.291 \| good	37.114 \| good	0.396 \| good	3.199 \| good	0.15 \| good
2026-08-16T14:00:00.000Z	38 \| good	6.536 \| good	21.21 \| good	38.998 \| good	0.386 \| good	3.357 \| good	0.15 \| good
2026-08-16T15:00:00.000Z	38 \| good	5.142 \| good	21.758 \| good	40.616 \| good	0.336 \| good	3.703 \| good	0.15 \| good
2026-08-16T16:00:00.000Z	37 \| good	4.212 \| good	13.179 \| good	40.119 \| good	0.375 \| good	2.654 \| good	0.184 \| good
2026-08-16T17:00:00.000Z	38 \| good	5.336 \| good	16.646 \| good	40.699 \| good	0.425 \| good	2.74 \| good	0.218 \| good
2026-08-16T18:00:00.000Z	37 \| good	4.394 \| good	18.876 \| good	40.323 \| good	0.429 \| good	2.97 \| good	0.184 \| good
2026-08-16T19:00:00.000Z	37 \| good	4.392 \| good	18.896 \| good	40.274 \| good	0.429 \| good	2.97 \| good	0.184 \| good
2026-08-16T20:00:00.000Z	35 \| good	5.303 \| good	22.723 \| good	38.15 \| good	0.326 \| good	0.506 \| good	0.113 \| good
2026-08-16T21:00:00.000Z	37 \| good	5.185 \| good	22.241 \| good	40.035 \| good	0.282 \| good	0.4 \| good	0.108 \| good
2026-08-16T22:00:00.000Z	39 \| good	4.855 \| good	21.05 \| good	42.357 \| good	0.253 \| good	0.352 \| good	0.106 \| good
2026-08-16T23:00:00.000Z	41 \| good	5.001 \| good	21.855 \| good	43.87 \| good	0.233 \| good	0.335 \| good	0.104 \| good
2026-08-17T00:00:00.000Z	39 \| good	5.348 \| good	23.127 \| good	41.646 \| good	0.222 \| good	0.35 \| good	0.102 \| good
2026-08-17T01:00:00.000Z	38 \| good	5.389 \| good	23.038 \| good	40.851 \| good	0.217 \| good	0.447 \| good	0.102 \| good
2026-08-17T02:00:00.000Z	36 \| good	5.969 \| good	26.015 \| good	38.754 \| good	0.22 \| good	1.027 \| good	0.107 \| good
2026-08-17T03:00:00.000Z	37 \| good	5.823 \| good	25.203 \| good	39.809 \| good	0.25 \| good	3.083 \| good	0.121 \| good
2026-08-17T04:00:00.000Z	37 \| good	6.247 \| good	28.022 \| good	40.079 \| good	0.29 \| good	4.241 \| good	0.128 \| good
2026-08-17T05:00:00.000Z	36 \| good	5.823 \| good	25.494 \| good	39.411 \| good	0.324 \| good	5.279 \| good	0.134 \| good
2026-08-17T06:00:00.000Z	37 \| good	5.917 \| good	25.905 \| good	39.686 \| good	0.356 \| good	6.194 \| good	0.139 \| good
2026-08-17T07:00:00.000Z	36 \| good	5.635 \| good	24.549 \| good	39.227 \| good	0.374 \| good	6.797 \| good	0.141 \| good
2026-08-17T08:00:00.000Z	37 \| good	5.453 \| good	23.751 \| good	39.568 \| good	0.377 \| good	7.196 \| good	0.142 \| good
2026-08-17T09:00:00.000Z	36 \| good	5.804 \| good	25.332 \| good	38.782 \| good	0.367 \| good	7.612 \| good	0.142 \| good
2026-08-17T10:00:00.000Z	37 \| good	5.578 \| good	24.529 \| good	39.843 \| good	0.34 \| good	8.165 \| good	0.143 \| good
2026-08-17T11:00:00.000Z	37 \| good	5.509 \| good	23.759 \| good	39.982 \| good	0.314 \| good	8.795 \| good	0.143 \| good
2026-08-17T12:00:00.000Z	36 \| good	5.108 \| good	22.234 \| good	38.627 \| good	0.3 \| good	9.294 \| good	0.144 \| good
2026-08-17T13:00:00.000Z	37 \| good	5.798 \| good	25.306 \| good	39.573 \| good	0.305 \| good	9.63 \| good	0.145 \| good
2026-08-17T14:00:00.000Z	33 \| good	5.6 \| good	24.025 \| good	35.785 \| good	0.316 \| good	9.217 \| good	0.146 \| good
2026-08-17T15:00:00.000Z	33 \| good	6.224 \| good	27.753 \| good	32.967 \| good	0.316 \| good	8.234 \| good	0.152 \| good
2026-08-17T16:00:00.000Z	35 \| good	6.346 \| good	28.275 \| good	38.219 \| good	0.41 \| good	4.267 \| good	0.133 \| good
2026-08-17T17:00:00.000Z	40 \| good	6.136 \| good	27.228 \| good	42.588 \| good	0.435 \| good	2.726 \| good	0.129 \| good
2026-08-17T18:00:00.000Z	41 \| good	6.171 \| good	27.232 \| good	43.688 \| good	0.454 \| good	1.795 \| good	0.128 \| good
2026-08-17T19:00:00.000Z	43 \| good	7.285 \| good	32.217 \| good	46.157 \| good	0.458 \| good	1.202 \| good	0.126 \| good
2026-08-17T20:00:00.000Z	45 \| good	8.094 \| good	35.46 \| good	49.228 \| good	0.445 \| good	0.821 \| good	0.122 \| good
2026-08-17T21:00:00.000Z	49 \| good	8.563 \| good	37.823 \| good	48.385 \| good	0.394 \| good	0.569 \| good	0.115 \| good
2026-08-17T22:00:00.000Z	44 \| good	7.949 \| good	34.761 \| good	45.485 \| good	0.333 \| good	0.431 \| good	0.108 \| good
2026-08-17T23:00:00.000Z	40 \| good	7.355 \| good	32.429 \| good	43.131 \| good	0.307 \| good	0.381 \| good	0.107 \| good
2026-08-18T00:00:00.000Z	40 \| good	6.972 \| good	30.861 \| good	43.346 \| good	0.291 \| good	0.389 \| good	0.106 \| good
2026-08-18T01:00:00.000Z	41 \| good	6.795 \| good	30.21 \| good	44.106 \| good	0.283 \| good	0.498 \| good	0.106 \| good
2026-08-18T02:00:00.000Z	38 \| good	6.108 \| good	26.559 \| good	41.177 \| good	0.287 \| good	1.102 \| good	0.11 \| good
2026-08-18T03:00:00.000Z	36 \| good	5.455 \| good	23.558 \| good	39.298 \| good	0.316 \| good	2.996 \| good	0.124 \| good
2026-08-18T04:00:00.000Z	36 \| good	6.291 \| good	28.057 \| good	39.327 \| good	0.368 \| good	4.016 \| good	0.131 \| good
2026-08-18T05:00:00.000Z	35 \| good	6.364 \| good	28.338 \| good	37.582 \| good	0.414 \| good	4.952 \| good	0.137 \| good
2026-08-18T06:00:00.000Z	38 \| good	7.124 \| good	31.694 \| good	39.202 \| good	0.441 \| good	6.083 \| good	0.144 \| good
2026-08-18T07:00:00.000Z	40 \| good	7.469 \| good	32.471 \| good	42.924 \| good	0.448 \| good	7.203 \| good	0.15 \| good
2026-08-18T08:00:00.000Z	44 \| good	7.644 \| good	33.55 \| good	43.298 \| good	0.432 \| good	8.237 \| good	0.155 \| good
2026-08-18T09:00:00.000Z	44 \| good	7.86 \| good	34.761 \| good	41.781 \| good	0.41 \| good	9.033 \| good	0.157 \| good
2026-08-18T10:00:00.000Z	41 \| good	6.613 \| good	29.445 \| good	43.557 \| good	0.409 \| good	9.598 \| good	0.157 \| good
2026-08-18T11:00:00.000Z	40 \| good	5.794 \| good	25.595 \| good	42.929 \| good	0.432 \| good	9.844 \| good	0.156 \| good
2026-08-18T12:00:00.000Z	40 \| good	4.764 \| good	20.648 \| good	42.864 \| good	0.437 \| good	10.297 \| good	0.157 \| good
2026-08-18T13:00:00.000Z	40 \| good	4.544 \| good	19.635 \| good	43.001 \| good	0.434 \| good	10.797 \| good	0.158 \| good
2026-08-18T14:00:00.000Z	36 \| good	3.891 \| good	16.843 \| good	38.689 \| good	0.432 \| good	10.833 \| good	0.159 \| good
2026-08-18T15:00:00.000Z	33 \| good	4.176 \| good	18.237 \| good	35.841 \| good	0.404 \| good	9.396 \| good	0.169 \| good
2026-08-18T16:00:00.000Z	34 \| good	4.277 \| good	18.466 \| good	36.936 \| good	0.474 \| good	4.102 \| good	0.146 \| good
2026-08-18T17:00:00.000Z	39 \| good	4.469 \| good	19.514 \| good	41.774 \| good	0.472 \| good	2.509 \| good	0.138 \| good
2026-08-18T18:00:00.000Z	40 \| good	4.847 \| good	21.149 \| good	43.422 \| good	0.482 \| good	1.77 \| good	0.139 \| good
2026-08-18T19:00:00.000Z	41 \| good	5.275 \| good	23.078 \| good	44.391 \| good	0.48 \| good	1.181 \| good	0.136 \| 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

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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?