What is the current concentration of PM10 in Spearfish, South Dakota?

The current PM10 concentration at Spearfish, South Dakota is 11.869 μg/m3.

What is the current concentration of sulfur dioxide (SO2) in Spearfish, South Dakota?

The current sulfur dioxide (SO2) concentration at Spearfish, South Dakota is 0.182 ppb.

What is the current concentration of ozone (O3) in Spearfish, South Dakota?

The current ozone (O3) concentration at Spearfish, South Dakota is 43.767 ppm.

What is the current concentration of nitrogen dioxide (NO2) in Spearfish, South Dakota?

The current nitrogen dioxide (NO2) concentration at Spearfish, South Dakota is 0.288 ppb.

Spearfish, South Dakota live air quality index now

Q: What is the current concentration of PM2.5 in Spearfish, South Dakota?

The current PM2.5 concentration at Spearfish, South Dakota is 2.859 μg/m3.

Stay updated with real-time air quality in Spearfish, South Dakota 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

Spearfish, South Dakota

Last updated: ... (Local time)

Major air pollutants in Spearfish, South Dakota

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

2.86 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

11.87 μg/m³

155

255

425

605+

Ozone (O₃)

43.77 ppb

201

201+

Sulfur Dioxide (SO₂)

0.18 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

0.29 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.09 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

High

Spearfish, South Dakota

Get Live Pollen Counts

Spearfish, South Dakota

Scroll To Air Quality Map

Track live Spearfish, South Dakota air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T22:00:00.000Z	41 \| good	5.056 \| good	21.808 \| good	44.286 \| good	0.253 \| good	0.342 \| good	0.109 \| good
2026-10-20T23:00:00.000Z	36 \| good	5.401 \| good	23.241 \| good	39.255 \| good	0.255 \| good	0.479 \| good	0.109 \| good
2026-10-21T00:00:00.000Z	34 \| good	3.968 \| good	17.182 \| good	36.571 \| good	0.234 \| good	1.07 \| good	0.112 \| good
2026-10-21T01:00:00.000Z	35 \| good	4.371 \| good	19.123 \| good	37.812 \| good	0.233 \| good	1.604 \| good	0.115 \| good
2026-10-21T02:00:00.000Z	33 \| good	4.078 \| good	17.615 \| good	36.421 \| good	0.229 \| good	1.729 \| good	0.117 \| good
2026-10-21T03:00:00.000Z	31 \| good	4.537 \| good	19.687 \| good	33.759 \| good	0.224 \| good	1.601 \| good	0.117 \| good
2026-10-21T04:00:00.000Z	30 \| good	4.343 \| good	19.182 \| good	31.969 \| good	0.223 \| good	1.496 \| good	0.118 \| good
2026-10-21T05:00:00.000Z	30 \| good	4.292 \| good	18.941 \| good	31.756 \| good	0.229 \| good	1.508 \| good	0.12 \| good
2026-10-21T06:00:00.000Z	33 \| good	6.368 \| good	28.616 \| good	31.039 \| good	0.234 \| good	1.54 \| good	0.122 \| good
2026-10-21T07:00:00.000Z	33 \| good	5.501 \| good	23.749 \| good	29.986 \| good	0.228 \| good	1.592 \| good	0.122 \| good
2026-10-21T08:00:00.000Z	33 \| good	5.681 \| good	24.749 \| good	30.864 \| good	0.212 \| good	1.642 \| good	0.123 \| good
2026-10-21T09:00:00.000Z	33 \| good	5.545 \| good	23.749 \| good	31.397 \| good	0.195 \| good	1.692 \| good	0.123 \| good
2026-10-21T10:00:00.000Z	33 \| good	6.349 \| good	28.241 \| good	30.024 \| good	0.182 \| good	1.776 \| good	0.123 \| good
2026-10-21T11:00:00.000Z	28 \| good	5.253 \| good	22.272 \| good	29.613 \| good	0.173 \| good	1.889 \| good	0.123 \| good
2026-10-21T12:00:00.000Z	27 \| good	5.384 \| good	23.364 \| good	27.24 \| good	0.143 \| good	1.917 \| good	0.127 \| good
2026-10-21T13:00:00.000Z	25 \| good	4.158 \| good	17.931 \| good	26.744 \| good	0.146 \| good	2.084 \| good	0.128 \| good
2026-10-21T14:00:00.000Z	52 \| moderate	9.729 \| good	43.027 \| good	24.972 \| good	0.154 \| good	2.191 \| good	0.131 \| good
2026-10-21T15:00:00.000Z	38 \| good	6.634 \| good	29.475 \| good	29.176 \| good	0.162 \| good	1.934 \| good	0.134 \| good
2026-10-21T16:00:00.000Z	32 \| good	4.429 \| good	19.305 \| good	34.612 \| good	0.278 \| good	0.968 \| good	0.133 \| good
2026-10-21T17:00:00.000Z	32 \| good	4.315 \| good	18.844 \| good	34.673 \| good	0.372 \| good	0.636 \| good	0.133 \| good
2026-10-21T18:00:00.000Z	33 \| good	4.483 \| good	19.769 \| good	35.852 \| good	0.423 \| good	0.5 \| good	0.133 \| good
2026-10-21T19:00:00.000Z	36 \| good	6.156 \| good	27.577 \| good	39.321 \| good	0.46 \| good	0.421 \| good	0.133 \| good
2026-10-21T20:00:00.000Z	38 \| good	5.464 \| good	24.023 \| good	41.441 \| good	0.49 \| good	0.378 \| good	0.132 \| good
2026-10-21T21:00:00.000Z	40 \| good	5.249 \| good	23.051 \| good	43.058 \| good	0.509 \| good	0.36 \| good	0.13 \| good
2026-10-21T22:00:00.000Z	40 \| good	3.872 \| good	17.187 \| good	42.591 \| good	0.516 \| good	0.382 \| good	0.128 \| good
2026-10-21T23:00:00.000Z	35 \| good	4.655 \| good	20.305 \| good	37.933 \| good	0.525 \| good	0.511 \| good	0.127 \| good
2026-10-22T00:00:00.000Z	33 \| good	4.421 \| good	19.123 \| good	36.024 \| good	0.524 \| good	0.873 \| good	0.128 \| good
2026-10-22T01:00:00.000Z	34 \| good	4.553 \| good	19.807 \| good	37.152 \| good	0.512 \| good	1.194 \| good	0.13 \| good
2026-10-22T02:00:00.000Z	35 \| good	3.404 \| good	15.257 \| good	37.541 \| good	0.486 \| good	1.303 \| good	0.131 \| good
2026-10-22T03:00:00.000Z	35 \| good	3.265 \| good	14.315 \| good	38.18 \| good	0.462 \| good	1.344 \| good	0.132 \| good
2026-10-22T04:00:00.000Z	36 \| good	3.681 \| good	16 \| good	39.363 \| good	0.441 \| good	1.316 \| good	0.132 \| good
2026-10-22T05:00:00.000Z	39 \| good	4.008 \| good	17.433 \| good	41.603 \| good	0.413 \| good	1.247 \| good	0.132 \| good
2026-10-22T06:00:00.000Z	38 \| good	4.588 \| good	20 \| good	41.049 \| good	0.37 \| good	1.155 \| good	0.131 \| good
2026-10-22T07:00:00.000Z	41 \| good	3.415 \| good	15 \| good	43.642 \| good	0.321 \| good	1.063 \| good	0.129 \| good
2026-10-22T08:00:00.000Z	41 \| good	4.47 \| good	19 \| good	43.756 \| good	0.282 \| good	1.047 \| good	0.127 \| good
2026-10-22T09:00:00.000Z	40 \| good	3.446 \| good	15.374 \| good	42.728 \| good	0.255 \| good	1.099 \| good	0.126 \| good
2026-10-22T10:00:00.000Z	36 \| good	4.05 \| good	17.941 \| good	38.556 \| good	0.234 \| good	1.195 \| good	0.125 \| good
2026-10-22T11:00:00.000Z	32 \| good	3.388 \| good	15.031 \| good	35.331 \| good	0.216 \| good	1.302 \| good	0.124 \| good
2026-10-22T12:00:00.000Z	31 \| good	3.24 \| good	14.315 \| good	33.183 \| good	0.233 \| good	1.406 \| good	0.12 \| good
2026-10-22T13:00:00.000Z	27 \| good	3.794 \| good	16.433 \| good	29.278 \| good	0.224 \| good	1.59 \| good	0.12 \| good
2026-10-22T14:00:00.000Z	54 \| moderate	11.488 \| good	50.814 \| good	28.746 \| good	0.216 \| good	1.758 \| good	0.12 \| good
2026-10-22T15:00:00.000Z	33 \| good	6.253 \| good	27.847 \| good	35.486 \| good	0.208 \| good	1.465 \| good	0.12 \| good
2026-10-22T16:00:00.000Z	36 \| good	3.114 \| good	13.739 \| good	39.344 \| good	0.22 \| good	1.157 \| good	0.116 \| good
2026-10-22T17:00:00.000Z	38 \| good	2.993 \| good	12.334 \| good	40.699 \| good	0.225 \| good	0.586 \| good	0.099 \| good
2026-10-22T18:00:00.000Z	39 \| good	3.351 \| good	14.489 \| good	41.997 \| good	0.215 \| good	0.414 \| good	0.094 \| good
2026-10-22T19:00:00.000Z	41 \| good	2.327 \| good	9.751 \| good	43.591 \| good	0.206 \| good	0.337 \| good	0.091 \| good
2026-10-22T20:00:00.000Z	40 \| good	2.669 \| good	10.556 \| good	42.856 \| good	0.193 \| good	0.298 \| good	0.089 \| good
2026-10-22T21:00:00.000Z	41 \| good	2.859 \| good	11.869 \| good	43.767 \| good	0.182 \| good	0.288 \| good	0.088 \| good
2026-10-22T21:00:00.000Z	41 \| good	2.859 \| good	11.869 \| good	43.767 \| good	0.182 \| good	0.288 \| good	0.088 \| good
2026-10-22T22:00:00.000Z	41 \| good	2.475 \| good	10.205 \| good	44.334 \| good	0.176 \| good	0.317 \| good	0.087 \| good
2026-10-22T23:00:00.000Z	40 \| good	3.101 \| good	13.257 \| good	43.381 \| good	0.17 \| good	0.599 \| good	0.088 \| good
2026-10-23T00:00:00.000Z	35 \| good	3.875 \| good	17.001 \| good	38.406 \| good	0.166 \| good	1.377 \| good	0.091 \| good
2026-10-23T01:00:00.000Z	35 \| good	3.275 \| good	13.914 \| good	37.816 \| good	0.162 \| good	2.028 \| good	0.094 \| good
2026-10-23T02:00:00.000Z	34 \| good	1.914 \| good	7.838 \| good	37.35 \| good	0.155 \| good	2.269 \| good	0.095 \| good
2026-10-23T03:00:00.000Z	34 \| good	1.033 \| good	4.269 \| good	36.835 \| good	0.152 \| good	2.116 \| good	0.093 \| good
2026-10-23T04:00:00.000Z	33 \| good	1.28 \| good	5.045 \| good	35.959 \| good	0.155 \| good	1.863 \| good	0.091 \| good
2026-10-23T05:00:00.000Z	33 \| good	1.72 \| good	7.068 \| good	36.495 \| good	0.161 \| good	1.675 \| good	0.09 \| good
2026-10-23T06:00:00.000Z	33 \| good	1.858 \| good	7.812 \| good	36.434 \| good	0.162 \| good	1.564 \| good	0.09 \| good
2026-10-23T07:00:00.000Z	33 \| good	1.299 \| good	5.356 \| good	36.407 \| good	0.152 \| good	1.477 \| good	0.092 \| good
2026-10-23T08:00:00.000Z	34 \| good	2.747 \| good	11.225 \| good	36.952 \| good	0.133 \| good	1.404 \| good	0.096 \| good
2026-10-23T09:00:00.000Z	34 \| good	3.518 \| good	15.429 \| good	37.074 \| good	0.114 \| good	1.339 \| good	0.099 \| good
2026-10-23T10:00:00.000Z	31 \| good	3.958 \| good	17.32 \| good	33.459 \| good	0.102 \| good	1.32 \| good	0.102 \| good
2026-10-23T11:00:00.000Z	30 \| good	3.577 \| good	15.831 \| good	32.409 \| good	0.099 \| good	1.329 \| good	0.103 \| good
2026-10-23T12:00:00.000Z	29 \| good	2.573 \| good	10.455 \| good	30.709 \| good	0.106 \| good	1.367 \| good	0.104 \| good
2026-10-23T13:00:00.000Z	25 \| good	1.814 \| good	7.398 \| good	26.9 \| good	0.121 \| good	1.521 \| good	0.105 \| good
2026-10-23T14:00:00.000Z	27 \| good	5.129 \| good	22.192 \| good	27.826 \| good	0.142 \| good	1.793 \| good	0.107 \| good
2026-10-23T15:00:00.000Z	29 \| good	4.647 \| good	20.098 \| good	31.349 \| good	0.163 \| good	1.66 \| good	0.108 \| good
2026-10-23T16:00:00.000Z	30 \| good	1.971 \| good	8.224 \| good	31.911 \| good	0.202 \| good	1.277 \| good	0.107 \| good
2026-10-23T17:00:00.000Z	30 \| good	1.472 \| good	5.888 \| good	31.554 \| good	0.303 \| good	1.002 \| good	0.103 \| good
2026-10-23T18:00:00.000Z	32 \| good	2.139 \| good	9 \| good	35.186 \| good	0.303 \| good	0.716 \| good	0.1 \| good
2026-10-23T19:00:00.000Z	37 \| good	2.108 \| good	8.519 \| good	39.646 \| good	0.226 \| good	0.471 \| good	0.099 \| good
2026-10-23T20:00:00.000Z	40 \| good	1.036 \| good	4 \| good	43.149 \| good	0.156 \| good	0.286 \| good	0.098 \| good
2026-10-23T21:00:00.000Z	42 \| good	1.946 \| good	7.979 \| good	44.545 \| good	0.115 \| good	0.192 \| good	0.1 \| good
2026-10-23T22:00:00.000Z	41 \| good	0.642 \| good	2.068 \| good	43.865 \| good	0.107 \| good	0.187 \| good	0.102 \| good
2026-10-23T23:00:00.000Z	40 \| good	2.336 \| good	9.662 \| good	43.16 \| good	0.111 \| good	0.24 \| good	0.104 \| good
2026-10-24T00:00:00.000Z	40 \| good	1.575 \| good	6.38 \| good	42.773 \| good	0.115 \| good	0.322 \| good	0.105 \| good
2026-10-24T01:00:00.000Z	41 \| good	2.079 \| good	8.454 \| good	44.399 \| good	0.12 \| good	0.348 \| good	0.107 \| good
2026-10-24T02:00:00.000Z	42 \| good	2.267 \| good	9.346 \| good	45.078 \| good	0.129 \| good	0.357 \| good	0.108 \| good
2026-10-24T03:00:00.000Z	42 \| good	1.492 \| good	5.93 \| good	44.531 \| good	0.132 \| good	0.375 \| good	0.109 \| good
2026-10-24T04:00:00.000Z	36 \| good	4.203 \| good	18.327 \| good	39.031 \| good	0.127 \| good	0.492 \| good	0.11 \| good
2026-10-24T05:00:00.000Z	33 \| good	5.517 \| good	24.238 \| good	30.456 \| good	0.222 \| good	0.929 \| good	0.134 \| good
2026-10-24T06:00:00.000Z	49 \| good	8.832 \| good	39.179 \| good	29.911 \| good	0.377 \| good	0.887 \| good	0.149 \| good
2026-10-24T07:00:00.000Z	52 \| moderate	10.318 \| good	45.637 \| good	30.512 \| good	0.484 \| good	0.691 \| good	0.148 \| good
2026-10-24T08:00:00.000Z	54 \| moderate	10.973 \| good	48.599 \| good	31.114 \| good	0.497 \| good	0.585 \| good	0.143 \| good
2026-10-24T09:00:00.000Z	38 \| good	6.794 \| good	30.091 \| good	30.284 \| good	0.448 \| good	0.46 \| good	0.137 \| good
2026-10-24T10:00:00.000Z	33 \| good	5.878 \| good	25.696 \| good	27.991 \| good	0.391 \| good	0.355 \| good	0.131 \| good
2026-10-24T11:00:00.000Z	27 \| good	5.303 \| good	22.737 \| good	28.28 \| good	0.326 \| good	0.304 \| good	0.127 \| good
2026-10-24T12:00:00.000Z	27 \| good	4.455 \| good	19.589 \| good	29.199 \| good	0.261 \| good	0.29 \| good	0.124 \| good
2026-10-24T13:00:00.000Z	26 \| good	2.492 \| good	10.246 \| good	27.606 \| good	0.223 \| good	0.307 \| good	0.122 \| good
2026-10-24T14:00:00.000Z	27 \| good	3.588 \| good	15.57 \| good	28.738 \| good	0.221 \| good	0.336 \| good	0.122 \| good
2026-10-24T15:00:00.000Z	28 \| good	3.461 \| good	15.404 \| good	30.096 \| good	0.236 \| good	0.295 \| good	0.123 \| good
2026-10-24T16:00:00.000Z	29 \| good	0.479 \| good	2 \| good	31.251 \| good	0.256 \| good	0.244 \| good	0.123 \| good
2026-10-24T17:00:00.000Z	30 \| good	1.091 \| good	4.395 \| good	32.334 \| good	0.267 \| good	0.198 \| good	0.122 \| good
2026-10-24T18:00:00.000Z	31 \| good	1.127 \| good	5 \| good	33.341 \| good	0.272 \| good	0.164 \| good	0.121 \| good
2026-10-24T19:00:00.000Z	32 \| good	1.474 \| good	5.955 \| good	35.243 \| good	0.274 \| good	0.144 \| good	0.12 \| good
2026-10-24T20:00:00.000Z	34 \| good	1.709 \| good	6.955 \| good	36.665 \| good	0.274 \| good	0.138 \| good	0.119 \| good
2026-10-24T21:00:00.000Z	35 \| good	0.956 \| good	4 \| good	37.915 \| good	0.273 \| good	0.146 \| good	0.119 \| good

Spearfish

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Spearfish, South Dakota air quality map: Track AQI near you

0.12ppm

How accurate is South Dakota, USA air quality data?

Air quality data and pollutant measurements for South Dakota, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.

Source: Ambee Data Sources

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Frequently asked questions

How often is the air quality data for Spearfish, South Dakota updated?

The air quality for Spearfish, South Dakota is updated every hour.

When was the worst air quality at Spearfish, South Dakota in the last 24 hrs?

The worst air quality in Spearfish, South Dakota in the last 24 hours was observed at 02:00:00 on 2026-10-22.

When was the best air quality at Spearfish, South Dakota in the last 24 hrs?

In the last 24 hrs, the best air quality in Spearfish, South Dakota was observed at 01:00:00 on 2026-10-22.

What is the current air quality in Spearfish, South Dakota?

The current air quality in Spearfish, South Dakota is 41, categorized as Good based on real-time data.

What pollutant is the most common in Spearfish, South Dakota?

The most common pollutant in Spearfish, South Dakota is O3.

What should I do if the air quality in Spearfish, South Dakota is poor?

If the air quality in Spearfish, South Dakota is poor, consider staying indoors and wearing a mask to protect yourself.

What is the current concentration of PM_2.5 in Spearfish, South Dakota?

The current PM_2.5 concentration at Spearfish, South Dakota is 2.859 μg/m³.

What is the current concentration of PM₁₀ in Spearfish, South Dakota?

The current PM₁₀ concentration at Spearfish, South Dakota is 11.869 μg/m³.

What is the current concentration of carbon monoxide (CO) in Spearfish, South Dakota?

The current carbon monoxide (CO) concentration at Spearfish, South Dakota is 0.088 ppm.

What is the current concentration of sulfur dioxide (SO₂) in Spearfish, South Dakota?

The current sulfur dioxide (SO₂) concentration at Spearfish, South Dakota is 0.182 ppb.

What is the current concentration of ozone (O₃) in Spearfish, South Dakota?

The current ozone (O₃) concentration at Spearfish, South Dakota is 43.767 ppm.

What is the current concentration of nitrogen dioxide (NO₂) in Spearfish, South Dakota?

The current nitrogen dioxide (NO₂) concentration at Spearfish, South Dakota is 0.288 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T22:00:00.000Z	41 \| good	5.056 \| good	21.808 \| good	44.286 \| good	0.253 \| good	0.342 \| good	0.109 \| good
2026-10-20T23:00:00.000Z	36 \| good	5.401 \| good	23.241 \| good	39.255 \| good	0.255 \| good	0.479 \| good	0.109 \| good
2026-10-21T00:00:00.000Z	34 \| good	3.968 \| good	17.182 \| good	36.571 \| good	0.234 \| good	1.07 \| good	0.112 \| good
2026-10-21T01:00:00.000Z	35 \| good	4.371 \| good	19.123 \| good	37.812 \| good	0.233 \| good	1.604 \| good	0.115 \| good
2026-10-21T02:00:00.000Z	33 \| good	4.078 \| good	17.615 \| good	36.421 \| good	0.229 \| good	1.729 \| good	0.117 \| good
2026-10-21T03:00:00.000Z	31 \| good	4.537 \| good	19.687 \| good	33.759 \| good	0.224 \| good	1.601 \| good	0.117 \| good
2026-10-21T04:00:00.000Z	30 \| good	4.343 \| good	19.182 \| good	31.969 \| good	0.223 \| good	1.496 \| good	0.118 \| good
2026-10-21T05:00:00.000Z	30 \| good	4.292 \| good	18.941 \| good	31.756 \| good	0.229 \| good	1.508 \| good	0.12 \| good
2026-10-21T06:00:00.000Z	33 \| good	6.368 \| good	28.616 \| good	31.039 \| good	0.234 \| good	1.54 \| good	0.122 \| good
2026-10-21T07:00:00.000Z	33 \| good	5.501 \| good	23.749 \| good	29.986 \| good	0.228 \| good	1.592 \| good	0.122 \| good
2026-10-21T08:00:00.000Z	33 \| good	5.681 \| good	24.749 \| good	30.864 \| good	0.212 \| good	1.642 \| good	0.123 \| good
2026-10-21T09:00:00.000Z	33 \| good	5.545 \| good	23.749 \| good	31.397 \| good	0.195 \| good	1.692 \| good	0.123 \| good
2026-10-21T10:00:00.000Z	33 \| good	6.349 \| good	28.241 \| good	30.024 \| good	0.182 \| good	1.776 \| good	0.123 \| good
2026-10-21T11:00:00.000Z	28 \| good	5.253 \| good	22.272 \| good	29.613 \| good	0.173 \| good	1.889 \| good	0.123 \| good
2026-10-21T12:00:00.000Z	27 \| good	5.384 \| good	23.364 \| good	27.24 \| good	0.143 \| good	1.917 \| good	0.127 \| good
2026-10-21T13:00:00.000Z	25 \| good	4.158 \| good	17.931 \| good	26.744 \| good	0.146 \| good	2.084 \| good	0.128 \| good
2026-10-21T14:00:00.000Z	52 \| moderate	9.729 \| good	43.027 \| good	24.972 \| good	0.154 \| good	2.191 \| good	0.131 \| good
2026-10-21T15:00:00.000Z	38 \| good	6.634 \| good	29.475 \| good	29.176 \| good	0.162 \| good	1.934 \| good	0.134 \| good
2026-10-21T16:00:00.000Z	32 \| good	4.429 \| good	19.305 \| good	34.612 \| good	0.278 \| good	0.968 \| good	0.133 \| good
2026-10-21T17:00:00.000Z	32 \| good	4.315 \| good	18.844 \| good	34.673 \| good	0.372 \| good	0.636 \| good	0.133 \| good
2026-10-21T18:00:00.000Z	33 \| good	4.483 \| good	19.769 \| good	35.852 \| good	0.423 \| good	0.5 \| good	0.133 \| good
2026-10-21T19:00:00.000Z	36 \| good	6.156 \| good	27.577 \| good	39.321 \| good	0.46 \| good	0.421 \| good	0.133 \| good
2026-10-21T20:00:00.000Z	38 \| good	5.464 \| good	24.023 \| good	41.441 \| good	0.49 \| good	0.378 \| good	0.132 \| good
2026-10-21T21:00:00.000Z	40 \| good	5.249 \| good	23.051 \| good	43.058 \| good	0.509 \| good	0.36 \| good	0.13 \| good
2026-10-21T22:00:00.000Z	40 \| good	3.872 \| good	17.187 \| good	42.591 \| good	0.516 \| good	0.382 \| good	0.128 \| good
2026-10-21T23:00:00.000Z	35 \| good	4.655 \| good	20.305 \| good	37.933 \| good	0.525 \| good	0.511 \| good	0.127 \| good
2026-10-22T00:00:00.000Z	33 \| good	4.421 \| good	19.123 \| good	36.024 \| good	0.524 \| good	0.873 \| good	0.128 \| good
2026-10-22T01:00:00.000Z	34 \| good	4.553 \| good	19.807 \| good	37.152 \| good	0.512 \| good	1.194 \| good	0.13 \| good
2026-10-22T02:00:00.000Z	35 \| good	3.404 \| good	15.257 \| good	37.541 \| good	0.486 \| good	1.303 \| good	0.131 \| good
2026-10-22T03:00:00.000Z	35 \| good	3.265 \| good	14.315 \| good	38.18 \| good	0.462 \| good	1.344 \| good	0.132 \| good
2026-10-22T04:00:00.000Z	36 \| good	3.681 \| good	16 \| good	39.363 \| good	0.441 \| good	1.316 \| good	0.132 \| good
2026-10-22T05:00:00.000Z	39 \| good	4.008 \| good	17.433 \| good	41.603 \| good	0.413 \| good	1.247 \| good	0.132 \| good
2026-10-22T06:00:00.000Z	38 \| good	4.588 \| good	20 \| good	41.049 \| good	0.37 \| good	1.155 \| good	0.131 \| good
2026-10-22T07:00:00.000Z	41 \| good	3.415 \| good	15 \| good	43.642 \| good	0.321 \| good	1.063 \| good	0.129 \| good
2026-10-22T08:00:00.000Z	41 \| good	4.47 \| good	19 \| good	43.756 \| good	0.282 \| good	1.047 \| good	0.127 \| good
2026-10-22T09:00:00.000Z	40 \| good	3.446 \| good	15.374 \| good	42.728 \| good	0.255 \| good	1.099 \| good	0.126 \| good
2026-10-22T10:00:00.000Z	36 \| good	4.05 \| good	17.941 \| good	38.556 \| good	0.234 \| good	1.195 \| good	0.125 \| good
2026-10-22T11:00:00.000Z	32 \| good	3.388 \| good	15.031 \| good	35.331 \| good	0.216 \| good	1.302 \| good	0.124 \| good
2026-10-22T12:00:00.000Z	31 \| good	3.24 \| good	14.315 \| good	33.183 \| good	0.233 \| good	1.406 \| good	0.12 \| good
2026-10-22T13:00:00.000Z	27 \| good	3.794 \| good	16.433 \| good	29.278 \| good	0.224 \| good	1.59 \| good	0.12 \| good
2026-10-22T14:00:00.000Z	54 \| moderate	11.488 \| good	50.814 \| good	28.746 \| good	0.216 \| good	1.758 \| good	0.12 \| good
2026-10-22T15:00:00.000Z	33 \| good	6.253 \| good	27.847 \| good	35.486 \| good	0.208 \| good	1.465 \| good	0.12 \| good
2026-10-22T16:00:00.000Z	36 \| good	3.114 \| good	13.739 \| good	39.344 \| good	0.22 \| good	1.157 \| good	0.116 \| good
2026-10-22T17:00:00.000Z	38 \| good	2.993 \| good	12.334 \| good	40.699 \| good	0.225 \| good	0.586 \| good	0.099 \| good
2026-10-22T18:00:00.000Z	39 \| good	3.351 \| good	14.489 \| good	41.997 \| good	0.215 \| good	0.414 \| good	0.094 \| good
2026-10-22T19:00:00.000Z	41 \| good	2.327 \| good	9.751 \| good	43.591 \| good	0.206 \| good	0.337 \| good	0.091 \| good
2026-10-22T20:00:00.000Z	40 \| good	2.669 \| good	10.556 \| good	42.856 \| good	0.193 \| good	0.298 \| good	0.089 \| good
2026-10-22T21:00:00.000Z	41 \| good	2.859 \| good	11.869 \| good	43.767 \| good	0.182 \| good	0.288 \| good	0.088 \| good
2026-10-22T21:00:00.000Z	41 \| good	2.859 \| good	11.869 \| good	43.767 \| good	0.182 \| good	0.288 \| good	0.088 \| good
2026-10-22T22:00:00.000Z	41 \| good	2.475 \| good	10.205 \| good	44.334 \| good	0.176 \| good	0.317 \| good	0.087 \| good
2026-10-22T23:00:00.000Z	40 \| good	3.101 \| good	13.257 \| good	43.381 \| good	0.17 \| good	0.599 \| good	0.088 \| good
2026-10-23T00:00:00.000Z	35 \| good	3.875 \| good	17.001 \| good	38.406 \| good	0.166 \| good	1.377 \| good	0.091 \| good
2026-10-23T01:00:00.000Z	35 \| good	3.275 \| good	13.914 \| good	37.816 \| good	0.162 \| good	2.028 \| good	0.094 \| good
2026-10-23T02:00:00.000Z	34 \| good	1.914 \| good	7.838 \| good	37.35 \| good	0.155 \| good	2.269 \| good	0.095 \| good
2026-10-23T03:00:00.000Z	34 \| good	1.033 \| good	4.269 \| good	36.835 \| good	0.152 \| good	2.116 \| good	0.093 \| good
2026-10-23T04:00:00.000Z	33 \| good	1.28 \| good	5.045 \| good	35.959 \| good	0.155 \| good	1.863 \| good	0.091 \| good
2026-10-23T05:00:00.000Z	33 \| good	1.72 \| good	7.068 \| good	36.495 \| good	0.161 \| good	1.675 \| good	0.09 \| good
2026-10-23T06:00:00.000Z	33 \| good	1.858 \| good	7.812 \| good	36.434 \| good	0.162 \| good	1.564 \| good	0.09 \| good
2026-10-23T07:00:00.000Z	33 \| good	1.299 \| good	5.356 \| good	36.407 \| good	0.152 \| good	1.477 \| good	0.092 \| good
2026-10-23T08:00:00.000Z	34 \| good	2.747 \| good	11.225 \| good	36.952 \| good	0.133 \| good	1.404 \| good	0.096 \| good
2026-10-23T09:00:00.000Z	34 \| good	3.518 \| good	15.429 \| good	37.074 \| good	0.114 \| good	1.339 \| good	0.099 \| good
2026-10-23T10:00:00.000Z	31 \| good	3.958 \| good	17.32 \| good	33.459 \| good	0.102 \| good	1.32 \| good	0.102 \| good
2026-10-23T11:00:00.000Z	30 \| good	3.577 \| good	15.831 \| good	32.409 \| good	0.099 \| good	1.329 \| good	0.103 \| good
2026-10-23T12:00:00.000Z	29 \| good	2.573 \| good	10.455 \| good	30.709 \| good	0.106 \| good	1.367 \| good	0.104 \| good
2026-10-23T13:00:00.000Z	25 \| good	1.814 \| good	7.398 \| good	26.9 \| good	0.121 \| good	1.521 \| good	0.105 \| good
2026-10-23T14:00:00.000Z	27 \| good	5.129 \| good	22.192 \| good	27.826 \| good	0.142 \| good	1.793 \| good	0.107 \| good
2026-10-23T15:00:00.000Z	29 \| good	4.647 \| good	20.098 \| good	31.349 \| good	0.163 \| good	1.66 \| good	0.108 \| good
2026-10-23T16:00:00.000Z	30 \| good	1.971 \| good	8.224 \| good	31.911 \| good	0.202 \| good	1.277 \| good	0.107 \| good
2026-10-23T17:00:00.000Z	30 \| good	1.472 \| good	5.888 \| good	31.554 \| good	0.303 \| good	1.002 \| good	0.103 \| good
2026-10-23T18:00:00.000Z	32 \| good	2.139 \| good	9 \| good	35.186 \| good	0.303 \| good	0.716 \| good	0.1 \| good
2026-10-23T19:00:00.000Z	37 \| good	2.108 \| good	8.519 \| good	39.646 \| good	0.226 \| good	0.471 \| good	0.099 \| good
2026-10-23T20:00:00.000Z	40 \| good	1.036 \| good	4 \| good	43.149 \| good	0.156 \| good	0.286 \| good	0.098 \| good
2026-10-23T21:00:00.000Z	42 \| good	1.946 \| good	7.979 \| good	44.545 \| good	0.115 \| good	0.192 \| good	0.1 \| good
2026-10-23T22:00:00.000Z	41 \| good	0.642 \| good	2.068 \| good	43.865 \| good	0.107 \| good	0.187 \| good	0.102 \| good
2026-10-23T23:00:00.000Z	40 \| good	2.336 \| good	9.662 \| good	43.16 \| good	0.111 \| good	0.24 \| good	0.104 \| good
2026-10-24T00:00:00.000Z	40 \| good	1.575 \| good	6.38 \| good	42.773 \| good	0.115 \| good	0.322 \| good	0.105 \| good
2026-10-24T01:00:00.000Z	41 \| good	2.079 \| good	8.454 \| good	44.399 \| good	0.12 \| good	0.348 \| good	0.107 \| good
2026-10-24T02:00:00.000Z	42 \| good	2.267 \| good	9.346 \| good	45.078 \| good	0.129 \| good	0.357 \| good	0.108 \| good
2026-10-24T03:00:00.000Z	42 \| good	1.492 \| good	5.93 \| good	44.531 \| good	0.132 \| good	0.375 \| good	0.109 \| good
2026-10-24T04:00:00.000Z	36 \| good	4.203 \| good	18.327 \| good	39.031 \| good	0.127 \| good	0.492 \| good	0.11 \| good
2026-10-24T05:00:00.000Z	33 \| good	5.517 \| good	24.238 \| good	30.456 \| good	0.222 \| good	0.929 \| good	0.134 \| good
2026-10-24T06:00:00.000Z	49 \| good	8.832 \| good	39.179 \| good	29.911 \| good	0.377 \| good	0.887 \| good	0.149 \| good
2026-10-24T07:00:00.000Z	52 \| moderate	10.318 \| good	45.637 \| good	30.512 \| good	0.484 \| good	0.691 \| good	0.148 \| good
2026-10-24T08:00:00.000Z	54 \| moderate	10.973 \| good	48.599 \| good	31.114 \| good	0.497 \| good	0.585 \| good	0.143 \| good
2026-10-24T09:00:00.000Z	38 \| good	6.794 \| good	30.091 \| good	30.284 \| good	0.448 \| good	0.46 \| good	0.137 \| good
2026-10-24T10:00:00.000Z	33 \| good	5.878 \| good	25.696 \| good	27.991 \| good	0.391 \| good	0.355 \| good	0.131 \| good
2026-10-24T11:00:00.000Z	27 \| good	5.303 \| good	22.737 \| good	28.28 \| good	0.326 \| good	0.304 \| good	0.127 \| good
2026-10-24T12:00:00.000Z	27 \| good	4.455 \| good	19.589 \| good	29.199 \| good	0.261 \| good	0.29 \| good	0.124 \| good
2026-10-24T13:00:00.000Z	26 \| good	2.492 \| good	10.246 \| good	27.606 \| good	0.223 \| good	0.307 \| good	0.122 \| good
2026-10-24T14:00:00.000Z	27 \| good	3.588 \| good	15.57 \| good	28.738 \| good	0.221 \| good	0.336 \| good	0.122 \| good
2026-10-24T15:00:00.000Z	28 \| good	3.461 \| good	15.404 \| good	30.096 \| good	0.236 \| good	0.295 \| good	0.123 \| good
2026-10-24T16:00:00.000Z	29 \| good	0.479 \| good	2 \| good	31.251 \| good	0.256 \| good	0.244 \| good	0.123 \| good
2026-10-24T17:00:00.000Z	30 \| good	1.091 \| good	4.395 \| good	32.334 \| good	0.267 \| good	0.198 \| good	0.122 \| good
2026-10-24T18:00:00.000Z	31 \| good	1.127 \| good	5 \| good	33.341 \| good	0.272 \| good	0.164 \| good	0.121 \| good
2026-10-24T19:00:00.000Z	32 \| good	1.474 \| good	5.955 \| good	35.243 \| good	0.274 \| good	0.144 \| good	0.12 \| good
2026-10-24T20:00:00.000Z	34 \| good	1.709 \| good	6.955 \| good	36.665 \| good	0.274 \| good	0.138 \| good	0.119 \| good
2026-10-24T21:00:00.000Z	35 \| good	0.956 \| good	4 \| good	37.915 \| good	0.273 \| good	0.146 \| good	0.119 \| good

Spearfish, South Dakota live air quality index now

Major air pollutants in Spearfish, South Dakota

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Spearfish, South Dakota air quality map: Track AQI near you

Air quality in nearby cities

Rapid City, South Dakota

Box Elder, South Dakota

Gillette, Wyoming

Sheridan, Wyoming

Casper, Wyoming

Dickinson, North Dakota

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Frequently asked questions

How often is the air quality data for Spearfish, South Dakota updated?

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What is the current air quality in Spearfish, South Dakota?

What pollutant is the most common in Spearfish, South Dakota?

What should I do if the air quality in Spearfish, South Dakota is poor?

What is the current concentration of PM2.5 in Spearfish, South Dakota?

What is the current concentration of PM10 in Spearfish, South Dakota?

What is the current concentration of carbon monoxide (CO) in Spearfish, South Dakota?

What is the current concentration of sulfur dioxide (SO2) in Spearfish, South Dakota?

What is the current concentration of ozone (O3) in Spearfish, South Dakota?

What is the current concentration of nitrogen dioxide (NO2) in Spearfish, South Dakota?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the current concentration of PM_2.5 in Spearfish, South Dakota?

What is the current concentration of PM₁₀ in Spearfish, South Dakota?

What is the current concentration of sulfur dioxide (SO₂) in Spearfish, South Dakota?

What is the current concentration of ozone (O₃) in Spearfish, South Dakota?

What is the current concentration of nitrogen dioxide (NO₂) in Spearfish, South Dakota?