What is the current concentration of PM10 in St. Helens, Oregon?

The current PM10 concentration at St. Helens, Oregon is 8.741 μg/m3.

What is the current concentration of sulfur dioxide (SO2) in St. Helens, Oregon?

The current sulfur dioxide (SO2) concentration at St. Helens, Oregon is 0.193 ppb.

What is the current concentration of ozone (O3) in St. Helens, Oregon?

The current ozone (O3) concentration at St. Helens, Oregon is 24.122 ppm.

What is the current concentration of nitrogen dioxide (NO2) in St. Helens, Oregon?

The current nitrogen dioxide (NO2) concentration at St. Helens, Oregon is 4.391 ppb.

St. Helens, Oregon live air quality index now

Q: What is the current concentration of PM2.5 in St. Helens, Oregon?

The current PM2.5 concentration at St. Helens, Oregon is 2.131 μg/m3.

Stay updated with real-time air quality in St. Helens, Oregon 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

St. Helens, Oregon

Last updated: ... (Local time)

Major air pollutants in St. Helens, Oregon

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

2.13 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

8.74 μg/m³

155

255

425

605+

Ozone (O₃)

24.12 ppb

201

201+

Sulfur Dioxide (SO₂)

0.19 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.39 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.13 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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St. Helens, Oregon

Scroll To Air Quality Map

Track live St. Helens, Oregon air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-03-12T21:00:00.000Z	32 \| good	2.93 \| good	12.219 \| good	35.374 \| good	0.178 \| good	7.76 \| good	0.114 \| good
2026-03-12T22:00:00.000Z	33 \| good	2.837 \| good	11.833 \| good	35.551 \| good	0.176 \| good	5.658 \| good	0.114 \| good
2026-03-12T23:00:00.000Z	36 \| good	2.687 \| good	11.098 \| good	38.76 \| good	0.119 \| good	5.904 \| good	0.122 \| good
2026-03-13T00:00:00.000Z	34 \| good	2.82 \| good	11.681 \| good	36.715 \| good	0.14 \| good	6.502 \| good	0.114 \| good
2026-03-13T01:00:00.000Z	35 \| good	2.836 \| good	12.134 \| good	37.944 \| good	0.178 \| good	5.904 \| good	0.114 \| good
2026-03-13T02:00:00.000Z	35 \| good	2.575 \| good	11.149 \| good	38.079 \| good	0.193 \| good	6.86 \| good	0.157 \| good
2026-03-13T03:00:00.000Z	31 \| good	2.724 \| good	11.979 \| good	34.217 \| good	0.177 \| good	5.92 \| good	0.172 \| good
2026-03-13T04:00:00.000Z	32 \| good	2.96 \| good	12.849 \| good	34.8 \| good	0.182 \| good	8.326 \| good	0.202 \| good
2026-03-13T05:00:00.000Z	32 \| good	3.217 \| good	13.947 \| good	34.568 \| good	0.185 \| good	8.36 \| good	0.202 \| good
2026-03-13T06:00:00.000Z	31 \| good	3.203 \| good	13.622 \| good	33.225 \| good	0.195 \| good	3.809 \| good	0.122 \| good
2026-03-13T07:00:00.000Z	25 \| good	3.127 \| good	13.421 \| good	26.892 \| good	0.195 \| good	4.233 \| good	0.122 \| good
2026-03-13T08:00:00.000Z	25 \| good	2.659 \| good	11.261 \| good	27.01 \| good	0.158 \| good	6.147 \| good	0.138 \| good
2026-03-13T09:00:00.000Z	27 \| good	2.414 \| good	10.461 \| good	28.866 \| good	0.145 \| good	6.3 \| good	0.193 \| good
2026-03-13T10:00:00.000Z	25 \| good	2.125 \| good	9.414 \| good	27.45 \| good	0.145 \| good	4.531 \| good	0.193 \| good
2026-03-13T11:00:00.000Z	28 \| good	1.856 \| good	7.998 \| good	30.071 \| good	0.158 \| good	2.834 \| good	0.141 \| good
2026-03-13T12:00:00.000Z	27 \| good	1.851 \| good	8.127 \| good	29.467 \| good	0.158 \| good	2.777 \| good	0.141 \| good
2026-03-13T13:00:00.000Z	25 \| good	1.88 \| good	7.757 \| good	27.293 \| good	0.157 \| good	4.209 \| good	0.128 \| good
2026-03-13T14:00:00.000Z	24 \| good	1.691 \| good	7.303 \| good	25.834 \| good	0.175 \| good	9.465 \| good	0.115 \| good
2026-03-13T15:00:00.000Z	21 \| good	1.611 \| good	6.612 \| good	22.855 \| good	0.157 \| good	7.143 \| good	0.142 \| good
2026-03-13T16:00:00.000Z	22 \| good	1.664 \| good	6.877 \| good	23.696 \| good	0.118 \| good	6.926 \| good	0.141 \| good
2026-03-13T17:00:00.000Z	18 \| good	1.611 \| good	6.695 \| good	19.18 \| good	0.176 \| good	8.184 \| good	0.129 \| good
2026-03-13T18:00:00.000Z	20 \| good	1.798 \| good	7.838 \| good	22.375 \| good	0.296 \| good	6.978 \| good	0.129 \| good
2026-03-13T19:00:00.000Z	19 \| good	1.762 \| good	7.619 \| good	20.311 \| good	0.407 \| good	4.613 \| good	0.16 \| good
2026-03-13T20:00:00.000Z	20 \| good	1.628 \| good	7.142 \| good	21.516 \| good	0.329 \| good	4.117 \| good	0.15 \| good
2026-03-13T21:00:00.000Z	22 \| good	1.505 \| good	6.476 \| good	23.681 \| good	0.131 \| good	5.995 \| good	0.173 \| good
2026-03-13T22:00:00.000Z	23 \| good	1.441 \| good	6.18 \| good	24.715 \| good	0.128 \| good	3.736 \| good	0.151 \| good
2026-03-13T23:00:00.000Z	25 \| good	1.487 \| good	6.397 \| good	26.901 \| good	0.126 \| good	3.594 \| good	0.169 \| good
2026-03-14T00:00:00.000Z	27 \| good	1.619 \| good	7.049 \| good	28.888 \| good	0.116 \| good	4.374 \| good	0.162 \| good
2026-03-14T01:00:00.000Z	29 \| good	2.151 \| good	9.202 \| good	30.824 \| good	0.141 \| good	4.297 \| good	0.184 \| good
2026-03-14T02:00:00.000Z	29 \| good	2.925 \| good	11.949 \| good	30.928 \| good	0.139 \| good	3.872 \| good	0.151 \| good
2026-03-14T03:00:00.000Z	25 \| good	2.626 \| good	10.868 \| good	27.214 \| good	0.135 \| good	5.134 \| good	0.13 \| good
2026-03-14T04:00:00.000Z	21 \| good	2.433 \| good	9.868 \| good	23.212 \| good	0.116 \| good	6.283 \| good	0.151 \| good
2026-03-14T05:00:00.000Z	25 \| good	2.68 \| good	11.394 \| good	26.864 \| good	0.676 \| good	5.879 \| good	0.158 \| good
2026-03-14T06:00:00.000Z	23 \| good	2.74 \| good	11.695 \| good	25.472 \| good	1.055 \| good	6.292 \| good	0.169 \| good
2026-03-14T07:00:00.000Z	22 \| good	2.262 \| good	9.701 \| good	23.772 \| good	1.009 \| good	8.84 \| good	0.169 \| good
2026-03-14T08:00:00.000Z	19 \| good	2.045 \| good	8.906 \| good	21.349 \| good	0.138 \| good	7.852 \| good	0.191 \| good
2026-03-14T09:00:00.000Z	20 \| good	2.195 \| good	9.662 \| good	21.651 \| good	0.16 \| good	6.199 \| good	0.182 \| good
2026-03-14T10:00:00.000Z	17 \| good	2.292 \| good	9.557 \| good	17.635 \| good	0.218 \| good	5.877 \| good	0.189 \| good
2026-03-14T11:00:00.000Z	15 \| good	1.982 \| good	8.232 \| good	16.347 \| good	0.167 \| good	4.037 \| good	0.171 \| good
2026-03-14T12:00:00.000Z	19 \| good	1.793 \| good	7.505 \| good	21.253 \| good	0.158 \| good	2.662 \| good	0.171 \| good
2026-03-14T13:00:00.000Z	28 \| good	1.696 \| good	7.135 \| good	30.162 \| good	0.156 \| good	3.339 \| good	0.171 \| good
2026-03-14T14:00:00.000Z	23 \| good	2.075 \| good	8.582 \| good	25.197 \| good	0.153 \| good	7.867 \| good	0.204 \| good
2026-03-14T15:00:00.000Z	26 \| good	2.174 \| good	8.9 \| good	27.825 \| good	0.217 \| good	13.763 \| good	0.377 \| good
2026-03-14T16:00:00.000Z	14 \| good	2.258 \| good	9.346 \| good	14.573 \| good	0.174 \| good	14.879 \| good	0.241 \| good
2026-03-14T17:00:00.000Z	17 \| good	2.347 \| good	10.021 \| good	17.52 \| good	0.199 \| good	8.553 \| good	0.179 \| good
2026-03-14T18:00:00.000Z	17 \| good	2.253 \| good	9.476 \| good	17.992 \| good	0.179 \| good	4.91 \| good	0.128 \| good
2026-03-14T19:00:00.000Z	22 \| good	2.131 \| good	8.741 \| good	24.122 \| good	0.193 \| good	4.391 \| good	0.128 \| good
2026-03-14T20:00:00.000Z	30 \| good	2.232 \| good	9.15 \| good	31.502 \| good	0.148 \| good	4.106 \| good	0.128 \| good
2026-03-14T20:00:00.000Z	22 \| good	2.131 \| good	8.741 \| good	24.122 \| good	0.193 \| good	4.391 \| good	0.128 \| good
2026-03-14T21:00:00.000Z	34 \| good	1.331 \| good	5.52 \| good	37.48 \| good	0.258 \| good	0.492 \| good	0.136 \| good
2026-03-14T22:00:00.000Z	35 \| good	1.458 \| good	6.093 \| good	37.948 \| good	0.254 \| good	0.522 \| good	0.136 \| good
2026-03-14T23:00:00.000Z	34 \| good	1.165 \| good	4.762 \| good	36.929 \| good	0.25 \| good	0.553 \| good	0.136 \| good
2026-03-15T00:00:00.000Z	31 \| good	0.727 \| good	2.823 \| good	33.859 \| good	0.246 \| good	0.584 \| good	0.136 \| good
2026-03-15T01:00:00.000Z	29 \| good	0.969 \| good	3.766 \| good	31.044 \| good	0.273 \| good	1.704 \| good	0.145 \| good
2026-03-15T02:00:00.000Z	23 \| good	1.095 \| good	4.457 \| good	24.723 \| good	0.3 \| good	2.825 \| good	0.154 \| good
2026-03-15T03:00:00.000Z	21 \| good	1.269 \| good	5.054 \| good	23.491 \| good	0.327 \| good	3.945 \| good	0.163 \| good
2026-03-15T04:00:00.000Z	20 \| good	1.72 \| good	7.377 \| good	22.088 \| good	0.359 \| good	4.146 \| good	0.165 \| good
2026-03-15T05:00:00.000Z	21 \| good	1.867 \| good	7.873 \| good	23.389 \| good	0.391 \| good	4.347 \| good	0.167 \| good
2026-03-15T06:00:00.000Z	19 \| good	1.468 \| good	5.739 \| good	21.112 \| good	0.422 \| good	4.548 \| good	0.169 \| good
2026-03-15T07:00:00.000Z	19 \| good	1.593 \| good	6.854 \| good	21.208 \| good	0.434 \| good	5.182 \| good	0.176 \| good
2026-03-15T08:00:00.000Z	19 \| good	1.547 \| good	6.309 \| good	21.196 \| good	0.446 \| good	5.817 \| good	0.183 \| good
2026-03-15T09:00:00.000Z	18 \| good	1.699 \| good	7.182 \| good	18.867 \| good	0.459 \| good	6.451 \| good	0.19 \| good
2026-03-15T10:00:00.000Z	17 \| good	2.21 \| good	9.393 \| good	18.261 \| good	0.457 \| good	6.217 \| good	0.188 \| good
2026-03-15T11:00:00.000Z	17 \| good	2.395 \| good	10.097 \| good	17.562 \| good	0.455 \| good	5.983 \| good	0.186 \| good
2026-03-15T12:00:00.000Z	12 \| good	2.263 \| good	9.492 \| good	13.394 \| good	0.454 \| good	5.75 \| good	0.184 \| good
2026-03-15T13:00:00.000Z	16 \| good	2.58 \| good	10.62 \| good	13.178 \| good	0.467 \| good	6.013 \| good	0.186 \| good
2026-03-15T14:00:00.000Z	15 \| good	1.236 \| good	5.307 \| good	15.688 \| good	0.48 \| good	6.277 \| good	0.188 \| good
2026-03-15T15:00:00.000Z	17 \| good	1.275 \| good	4.894 \| good	18.05 \| good	0.493 \| good	6.54 \| good	0.19 \| good
2026-03-15T16:00:00.000Z	20 \| good	1.279 \| good	4.754 \| good	22.089 \| good	0.478 \| good	5.667 \| good	0.186 \| good
2026-03-15T17:00:00.000Z	21 \| good	1.285 \| good	5.121 \| good	23.306 \| good	0.464 \| good	4.794 \| good	0.182 \| good
2026-03-15T18:00:00.000Z	25 \| good	1.256 \| good	5.071 \| good	27.259 \| good	0.449 \| good	3.921 \| good	0.178 \| good
2026-03-15T19:00:00.000Z	26 \| good	0.721 \| good	2.929 \| good	28.177 \| good	0.461 \| good	3.62 \| good	0.171 \| good
2026-03-15T20:00:00.000Z	27 \| good	0.822 \| good	3.234 \| good	28.695 \| good	0.473 \| good	3.319 \| good	0.164 \| good
2026-03-15T21:00:00.000Z	28 \| good	1.467 \| good	5.839 \| good	30.449 \| good	0.485 \| good	3.018 \| good	0.158 \| good
2026-03-15T22:00:00.000Z	30 \| good	1.789 \| good	7.026 \| good	31.937 \| good	0.497 \| good	3.667 \| good	0.164 \| good
2026-03-15T23:00:00.000Z	29 \| good	1.751 \| good	7.469 \| good	30.89 \| good	0.509 \| good	4.317 \| good	0.171 \| good
2026-03-16T00:00:00.000Z	29 \| good	2.306 \| good	9.639 \| good	31.257 \| good	0.52 \| good	4.967 \| good	0.178 \| good
2026-03-16T01:00:00.000Z	27 \| good	2.053 \| good	8.597 \| good	28.725 \| good	0.557 \| good	6.975 \| good	0.2 \| good
2026-03-16T02:00:00.000Z	24 \| good	2.017 \| good	8.597 \| good	25.709 \| good	0.593 \| good	8.984 \| good	0.222 \| good
2026-03-16T03:00:00.000Z	19 \| good	2.741 \| good	11.434 \| good	21.335 \| good	0.629 \| good	10.992 \| good	0.245 \| good
2026-03-16T04:00:00.000Z	26 \| good	1.612 \| good	6.475 \| good	27.792 \| good	0.667 \| good	10.838 \| good	0.247 \| good
2026-03-16T05:00:00.000Z	25 \| good	1.938 \| good	8.216 \| good	26.964 \| good	0.704 \| good	10.683 \| good	0.25 \| good
2026-03-16T06:00:00.000Z	23 \| good	1.862 \| good	8.068 \| good	24.805 \| good	0.742 \| good	10.528 \| good	0.253 \| good
2026-03-16T07:00:00.000Z	24 \| good	1.658 \| good	6.877 \| good	26.106 \| good	0.704 \| good	10.282 \| good	0.251 \| good
2026-03-16T08:00:00.000Z	24 \| good	2.099 \| good	8.708 \| good	25.648 \| good	0.666 \| good	10.035 \| good	0.249 \| good
2026-03-16T09:00:00.000Z	22 \| good	2.089 \| good	8.903 \| good	23.77 \| good	0.629 \| good	9.789 \| good	0.247 \| good
2026-03-16T10:00:00.000Z	19 \| good	2.419 \| good	10.139 \| good	20.005 \| good	0.621 \| good	9.782 \| good	0.239 \| good
2026-03-16T11:00:00.000Z	22 \| good	4.098 \| good	17.315 \| good	16.713 \| good	0.614 \| good	9.774 \| good	0.232 \| good
2026-03-16T12:00:00.000Z	33 \| good	5.85 \| good	25.654 \| good	13.497 \| good	0.607 \| good	9.767 \| good	0.224 \| good
2026-03-16T13:00:00.000Z	38 \| good	7.344 \| good	32.25 \| good	12.636 \| good	0.65 \| good	10.275 \| good	0.227 \| good
2026-03-16T14:00:00.000Z	54 \| moderate	11.213 \| good	50.082 \| good	12.004 \| good	0.693 \| good	10.783 \| good	0.231 \| good
2026-03-16T15:00:00.000Z	52 \| moderate	10.136 \| good	45.1 \| good	14.692 \| good	0.736 \| good	11.291 \| good	0.234 \| good
2026-03-16T16:00:00.000Z	54 \| moderate	11.047 \| good	48.553 \| good	16.043 \| good	0.871 \| good	10.217 \| good	0.229 \| good
2026-03-16T17:00:00.000Z	52 \| moderate	9.576 \| good	42.351 \| good	20.233 \| good	1.006 \| good	9.143 \| good	0.224 \| good
2026-03-16T18:00:00.000Z	52 \| moderate	10.042 \| good	44.497 \| good	21.449 \| good	1.141 \| good	8.069 \| good	0.219 \| good
2026-03-16T19:00:00.000Z	52 \| moderate	10.017 \| good	44.438 \| good	23.31 \| good	1.082 \| good	6.925 \| good	0.204 \| good
2026-03-16T20:00:00.000Z	44 \| good	7.856 \| good	34.854 \| good	24.414 \| good	1.024 \| good	5.781 \| good	0.189 \| good

St. Helens

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St. Helens, Oregon air quality map: Track AQI near you

0.12ppm

How accurate is Oregon, USA air quality data?

Air quality data and pollutant measurements for Oregon, 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 St. Helens, Oregon updated?

The air quality for St. Helens, Oregon is updated every hour.

When was the worst air quality at St. Helens, Oregon in the last 24 hrs?

The worst air quality in St. Helens, Oregon in the last 24 hours was observed at 02:00:00 on 2026-03-14.

When was the best air quality at St. Helens, Oregon in the last 24 hrs?

In the last 24 hrs, the best air quality in St. Helens, Oregon was observed at 04:00:00 on 2026-03-14.

What is the current air quality in St. Helens, Oregon?

The current air quality in St. Helens, Oregon is 22, categorized as Good based on real-time data.

What pollutant is the most common in St. Helens, Oregon?

The most common pollutant in St. Helens, Oregon is O3.

What should I do if the air quality in St. Helens, Oregon is poor?

If the air quality in St. Helens, Oregon is poor, consider staying indoors and wearing a mask to protect yourself.

What is the current concentration of PM_2.5 in St. Helens, Oregon?

The current PM_2.5 concentration at St. Helens, Oregon is 2.131 μg/m³.

What is the current concentration of PM₁₀ in St. Helens, Oregon?

The current PM₁₀ concentration at St. Helens, Oregon is 8.741 μg/m³.

What is the current concentration of carbon monoxide (CO) in St. Helens, Oregon?

The current carbon monoxide (CO) concentration at St. Helens, Oregon is 0.128 ppm.

What is the current concentration of sulfur dioxide (SO₂) in St. Helens, Oregon?

The current sulfur dioxide (SO₂) concentration at St. Helens, Oregon is 0.193 ppb.

What is the current concentration of ozone (O₃) in St. Helens, Oregon?

The current ozone (O₃) concentration at St. Helens, Oregon is 24.122 ppm.

What is the current concentration of nitrogen dioxide (NO₂) in St. Helens, Oregon?

The current nitrogen dioxide (NO₂) concentration at St. Helens, Oregon is 4.391 ppb.

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