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

The current PM10 concentration at St. Helens, Oregon is 48.127 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 1.494 ppb.

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

The current ozone (O3) concentration at St. Helens, Oregon is 19.487 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 9.674 ppb.

St. Helens, Oregon live air quality index now

Name: Live air pollution levels in St. Helens, Oregon today
Creator: Ambee

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)

5.28 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

23.08 μg/m³

155

255

425

605+

Ozone (O₃)

13.00 ppb

201

201+

Sulfur Dioxide (SO₂)

0.36 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.51 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.10 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

St. Helens, Oregon

Get Live Pollen Counts

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
2025-09-04T14:00:00.000Z	33 \| good	6.29 \| good	28.328 \| good	14.467 \| good	0.276 \| good	10.038 \| good	0.151 \| good
2025-09-04T15:00:00.000Z	33 \| good	6.28 \| good	27.936 \| good	12.786 \| good	0.252 \| good	10.853 \| good	0.112 \| good
2025-09-04T16:00:00.000Z	33 \| good	6.293 \| good	28.38 \| good	12.538 \| good	0.356 \| good	13.335 \| good	0.235 \| good
2025-09-04T17:00:00.000Z	38 \| good	6.668 \| good	29.285 \| good	14.011 \| good	0.433 \| good	9.839 \| good	0.163 \| good
2025-09-04T18:00:00.000Z	38 \| good	6.677 \| good	29.293 \| good	14.243 \| good	0.412 \| good	8.12 \| good	0.156 \| good
2025-09-04T19:00:00.000Z	44 \| good	8.298 \| good	36.662 \| good	15.216 \| good	0.406 \| good	9.911 \| good	0.2 \| good
2025-09-04T20:00:00.000Z	44 \| good	8.483 \| good	37.697 \| good	15.229 \| good	0.429 \| good	11.422 \| good	0.232 \| good
2025-09-04T21:00:00.000Z	52 \| moderate	9.752 \| good	43.085 \| good	18.089 \| good	0.624 \| good	10.992 \| good	0.244 \| good
2025-09-04T22:00:00.000Z	52 \| moderate	10.276 \| good	45.612 \| good	22.108 \| good	0.752 \| good	10.431 \| good	0.258 \| good
2025-09-04T23:00:00.000Z	54 \| moderate	10.645 \| good	46.924 \| good	26.181 \| good	0.594 \| good	10.208 \| good	0.295 \| good
2025-09-05T00:00:00.000Z	54 \| moderate	11.173 \| good	50.823 \| good	27.488 \| good	0.564 \| good	7.647 \| good	0.214 \| good
2025-09-05T01:00:00.000Z	56 \| moderate	11.53 \| good	51.513 \| good	33.173 \| good	0.564 \| good	6.341 \| good	0.214 \| good
2025-09-05T02:00:00.000Z	56 \| moderate	12.038 \| good	54.696 \| good	34.052 \| good	0.868 \| good	8.405 \| good	0.221 \| good
2025-09-05T03:00:00.000Z	56 \| moderate	12.001 \| good	54.326 \| good	31.421 \| good	0.789 \| good	9.422 \| good	0.177 \| good
2025-09-05T04:00:00.000Z	56 \| moderate	11.96 \| good	54.181 \| good	32.111 \| good	0.627 \| good	13.45 \| good	0.251 \| good
2025-09-05T05:00:00.000Z	56 \| moderate	11.51 \| good	51.619 \| good	29.432 \| good	0.465 \| good	14.489 \| good	0.258 \| good
2025-09-05T06:00:00.000Z	52 \| moderate	10.08 \| good	44.695 \| good	24.13 \| good	0.99 \| good	13.232 \| good	0.221 \| good
2025-09-05T07:00:00.000Z	52 \| moderate	10.016 \| good	44.455 \| good	21.544 \| good	0.388 \| good	11.189 \| good	0.165 \| good
2025-09-05T08:00:00.000Z	44 \| good	8.42 \| good	37.212 \| good	17.788 \| good	0.361 \| good	11.238 \| good	0.151 \| good
2025-09-05T09:00:00.000Z	44 \| good	7.586 \| good	33.107 \| good	14.022 \| good	0.37 \| good	9.852 \| good	0.107 \| good
2025-09-05T10:00:00.000Z	38 \| good	7.125 \| good	31.265 \| good	12.844 \| good	0.369 \| good	9.642 \| good	0.107 \| good
2025-09-05T11:00:00.000Z	38 \| good	7.31 \| good	32.62 \| good	12.085 \| good	0.381 \| good	8.9 \| good	0.107 \| good
2025-09-05T12:00:00.000Z	38 \| good	7.467 \| good	33.013 \| good	11.378 \| good	0.384 \| good	10.147 \| good	0.114 \| good
2025-09-05T13:00:00.000Z	38 \| good	7.45 \| good	32.931 \| good	10.332 \| good	0.309 \| good	10.219 \| good	0.114 \| good
2025-09-05T14:00:00.000Z	44 \| good	7.825 \| good	34.547 \| good	10.106 \| good	0.459 \| good	11.78 \| good	0.17 \| good
2025-09-05T15:00:00.000Z	44 \| good	7.543 \| good	33.472 \| good	8.475 \| good	0.468 \| good	10.197 \| good	0.214 \| good
2025-09-05T16:00:00.000Z	38 \| good	7.496 \| good	32.952 \| good	10.707 \| good	0.52 \| good	9.949 \| good	0.207 \| good
2025-09-05T17:00:00.000Z	38 \| good	7.462 \| good	32.772 \| good	10.521 \| good	0.616 \| good	10.456 \| good	0.17 \| good
2025-09-05T18:00:00.000Z	38 \| good	7.437 \| good	32.622 \| good	11.701 \| good	0.698 \| good	9.321 \| good	0.175 \| good
2025-09-05T19:00:00.000Z	38 \| good	7.354 \| good	32.307 \| good	11.615 \| good	0.897 \| good	10.161 \| good	0.214 \| good
2025-09-05T20:00:00.000Z	38 \| good	7.429 \| good	32.607 \| good	11.467 \| good	0.8 \| good	10.845 \| good	0.244 \| good
2025-09-05T21:00:00.000Z	38 \| good	7.429 \| good	32.608 \| good	11.257 \| good	0.697 \| good	10.315 \| good	0.244 \| good
2025-09-05T22:00:00.000Z	38 \| good	7.36 \| good	32.39 \| good	12.127 \| good	0.818 \| good	10.317 \| good	0.276 \| good
2025-09-05T23:00:00.000Z	38 \| good	7.335 \| good	32.33 \| good	16.108 \| good	0.811 \| good	10.434 \| good	0.281 \| good
2025-09-06T00:00:00.000Z	44 \| good	7.558 \| good	33.332 \| good	15.846 \| good	0.777 \| good	8.821 \| good	0.214 \| good
2025-09-06T01:00:00.000Z	44 \| good	7.822 \| good	34.256 \| good	17.594 \| good	0.586 \| good	8.312 \| good	0.214 \| good
2025-09-06T02:00:00.000Z	44 \| good	8.462 \| good	38.055 \| good	20.042 \| good	0.558 \| good	10.366 \| good	0.221 \| good
2025-09-06T03:00:00.000Z	49 \| good	9.384 \| good	41.95 \| good	20.57 \| good	0.542 \| good	6.909 \| good	0.184 \| good
2025-09-06T04:00:00.000Z	54 \| moderate	10.735 \| good	48.127 \| good	19.487 \| good	1.494 \| good	9.674 \| good	0.235 \| good
2025-09-06T05:00:00.000Z	54 \| moderate	10.537 \| good	46.79 \| good	16.965 \| good	1.773 \| good	10.653 \| good	0.228 \| good
2025-09-06T06:00:00.000Z	54 \| moderate	10.507 \| good	46.64 \| good	16.295 \| good	1.137 \| good	10.832 \| good	0.258 \| good
2025-09-06T07:00:00.000Z	49 \| good	8.704 \| good	38.835 \| good	13.598 \| good	0.605 \| good	9.842 \| good	0.202 \| good
2025-09-06T08:00:00.000Z	38 \| good	7.44 \| good	32.815 \| good	14.491 \| good	0.479 \| good	6.6 \| good	0.119 \| good
2025-09-06T09:00:00.000Z	38 \| good	6.875 \| good	30.546 \| good	12.938 \| good	0.447 \| good	5.309 \| good	0.119 \| good
2025-09-06T10:00:00.000Z	38 \| good	6.653 \| good	29.688 \| good	12.455 \| good	0.454 \| good	3.984 \| good	0.114 \| good
2025-09-06T11:00:00.000Z	33 \| good	5.845 \| good	25.881 \| good	12.298 \| good	0.429 \| good	3.905 \| good	0.107 \| good
2025-09-06T12:00:00.000Z	27 \| good	5.277 \| good	23.076 \| good	12.996 \| good	0.356 \| good	4.513 \| good	0.1 \| good
2025-09-06T13:00:00.000Z	27 \| good	5.277 \| good	23.076 \| good	12.996 \| good	0.356 \| good	4.513 \| good	0.1 \| good
2025-09-06T06:00:00.000Z	49 \| good	8.561 \| good	37.688 \| good	21.862 \| good	0.292 \| good	7.162 \| good	0.23 \| good
2025-09-06T07:00:00.000Z	49 \| good	8.987 \| good	39.481 \| good	21.575 \| good	0.278 \| good	6.524 \| good	0.221 \| good
2025-09-06T08:00:00.000Z	52 \| moderate	9.615 \| good	42.169 \| good	21.619 \| good	0.264 \| good	5.887 \| good	0.212 \| good
2025-09-06T09:00:00.000Z	49 \| good	9.108 \| good	40.33 \| good	18.812 \| good	0.25 \| good	5.25 \| good	0.203 \| good
2025-09-06T10:00:00.000Z	49 \| good	9.106 \| good	40.43 \| good	20.77 \| good	0.237 \| good	4.719 \| good	0.197 \| good
2025-09-06T11:00:00.000Z	49 \| good	9.417 \| good	41.636 \| good	19.795 \| good	0.224 \| good	4.189 \| good	0.192 \| good
2025-09-06T12:00:00.000Z	49 \| good	8.733 \| good	38.246 \| good	22.793 \| good	0.212 \| good	3.658 \| good	0.186 \| good
2025-09-06T13:00:00.000Z	44 \| good	7.547 \| good	33.478 \| good	21.133 \| good	0.23 \| good	3.652 \| good	0.188 \| good
2025-09-06T14:00:00.000Z	38 \| good	6.809 \| good	29.644 \| good	19.984 \| good	0.248 \| good	3.646 \| good	0.19 \| good
2025-09-06T15:00:00.000Z	38 \| good	7.057 \| good	31.053 \| good	23.39 \| good	0.266 \| good	3.64 \| good	0.191 \| good
2025-09-06T16:00:00.000Z	38 \| good	7.468 \| good	32.941 \| good	24.094 \| good	0.284 \| good	3.395 \| good	0.189 \| good
2025-09-06T17:00:00.000Z	44 \| good	7.857 \| good	34.917 \| good	25.193 \| good	0.302 \| good	3.151 \| good	0.186 \| good
2025-09-06T18:00:00.000Z	49 \| good	9.164 \| good	40.936 \| good	25.069 \| good	0.319 \| good	2.907 \| good	0.183 \| good
2025-09-06T19:00:00.000Z	52 \| moderate	10.401 \| good	45.983 \| good	26.609 \| good	0.295 \| good	2.662 \| good	0.18 \| good
2025-09-06T20:00:00.000Z	54 \| moderate	11.192 \| good	50.253 \| good	30.537 \| good	0.27 \| good	2.417 \| good	0.177 \| good
2025-09-06T21:00:00.000Z	56 \| moderate	11.89 \| good	52.267 \| good	34.946 \| good	0.245 \| good	2.173 \| good	0.174 \| good
2025-09-06T22:00:00.000Z	56 \| moderate	11.678 \| good	52.022 \| good	33.657 \| good	0.221 \| good	2.232 \| good	0.174 \| good
2025-09-06T23:00:00.000Z	56 \| moderate	12.057 \| good	53.342 \| good	31.234 \| good	0.196 \| good	2.291 \| good	0.173 \| good
2025-09-07T00:00:00.000Z	52 \| moderate	10.238 \| good	45.322 \| good	26.462 \| good	0.172 \| good	2.35 \| good	0.173 \| good
2025-09-07T01:00:00.000Z	52 \| moderate	10.097 \| good	44.553 \| good	25.525 \| good	0.193 \| good	3.15 \| good	0.178 \| good
2025-09-07T02:00:00.000Z	56 \| moderate	11.604 \| good	51.285 \| good	25.804 \| good	0.215 \| good	3.95 \| good	0.184 \| good
2025-09-07T03:00:00.000Z	60 \| moderate	14.038 \| fine	62.663 \| fine	21.911 \| good	0.236 \| good	4.751 \| good	0.189 \| good
2025-09-07T04:00:00.000Z	58 \| moderate	12.853 \| fine	56.816 \| fine	19.684 \| good	0.254 \| good	5.291 \| good	0.191 \| good
2025-09-07T05:00:00.000Z	56 \| moderate	12.223 \| fine	54.541 \| good	20.507 \| good	0.271 \| good	5.832 \| good	0.192 \| good
2025-09-07T06:00:00.000Z	54 \| moderate	11.407 \| good	50.79 \| good	17.914 \| good	0.289 \| good	6.372 \| good	0.194 \| good
2025-09-07T07:00:00.000Z	52 \| moderate	10.146 \| good	44.839 \| good	22.314 \| good	0.287 \| good	5.869 \| good	0.187 \| good
2025-09-07T08:00:00.000Z	52 \| moderate	10.17 \| good	45.084 \| good	20.714 \| good	0.285 \| good	5.366 \| good	0.18 \| good
2025-09-07T09:00:00.000Z	54 \| moderate	10.58 \| good	47.175 \| good	18.954 \| good	0.283 \| good	4.863 \| good	0.173 \| good
2025-09-07T10:00:00.000Z	56 \| moderate	11.845 \| good	52.878 \| good	17.797 \| good	0.287 \| good	4.531 \| good	0.167 \| good
2025-09-07T11:00:00.000Z	58 \| moderate	12.777 \| fine	56.51 \| fine	18.642 \| good	0.291 \| good	4.198 \| good	0.162 \| good
2025-09-07T12:00:00.000Z	58 \| moderate	12.691 \| fine	55.827 \| fine	16.28 \| good	0.296 \| good	3.865 \| good	0.156 \| good
2025-09-07T13:00:00.000Z	56 \| moderate	11.723 \| good	52.117 \| good	18.318 \| good	0.328 \| good	3.818 \| good	0.155 \| good
2025-09-07T14:00:00.000Z	52 \| moderate	10.182 \| good	45.167 \| good	19.852 \| good	0.361 \| good	3.771 \| good	0.154 \| good
2025-09-07T15:00:00.000Z	49 \| good	8.614 \| good	38.071 \| good	21.84 \| good	0.394 \| good	3.723 \| good	0.153 \| good
2025-09-07T16:00:00.000Z	38 \| good	6.785 \| good	29.777 \| good	26.366 \| good	0.382 \| good	3.26 \| good	0.148 \| good
2025-09-07T17:00:00.000Z	33 \| good	5.88 \| good	25.895 \| good	26.937 \| good	0.37 \| good	2.797 \| good	0.144 \| good
2025-09-07T18:00:00.000Z	38 \| good	6.583 \| good	28.903 \| good	27.14 \| good	0.358 \| good	2.333 \| good	0.139 \| good
2025-09-07T19:00:00.000Z	38 \| good	7.387 \| good	32.846 \| good	29.963 \| good	0.309 \| good	1.995 \| good	0.138 \| good
2025-09-07T20:00:00.000Z	44 \| good	7.959 \| good	35.049 \| good	31.106 \| good	0.26 \| good	1.657 \| good	0.136 \| good
2025-09-07T21:00:00.000Z	38 \| good	7.276 \| good	32.509 \| good	31.5 \| good	0.211 \| good	1.319 \| good	0.134 \| good
2025-09-07T22:00:00.000Z	38 \| good	6.745 \| good	29.893 \| good	28.399 \| good	0.194 \| good	1.341 \| good	0.133 \| good
2025-09-07T23:00:00.000Z	38 \| good	6.579 \| good	29.283 \| good	27.508 \| good	0.177 \| good	1.363 \| good	0.132 \| good
2025-09-08T00:00:00.000Z	60 \| moderate	13.995 \| fine	17.161 \| good	36.083 \| good	0.158 \| good	1.392 \| good	0.13 \| good
2025-09-08T01:00:00.000Z	33 \| good	6.438 \| good	27.823 \| good	22.557 \| good	0.172 \| good	2.572 \| good	0.139 \| good
2025-09-08T02:00:00.000Z	33 \| good	6.116 \| good	26.644 \| good	23.837 \| good	0.183 \| good	3.759 \| good	0.148 \| good
2025-09-08T03:00:00.000Z	33 \| good	6.037 \| good	26.242 \| good	24.676 \| good	0.195 \| good	4.947 \| good	0.157 \| good
2025-09-08T04:00:00.000Z	33 \| good	6.367 \| good	27.392 \| good	22.076 \| good	0.227 \| good	5.637 \| good	0.162 \| good
2025-09-08T05:00:00.000Z	33 \| good	6.349 \| good	27.331 \| good	23.005 \| good	0.258 \| good	6.327 \| good	0.167 \| good

St. Helens

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

0.10ppm

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 05:00:00 on 2025-09-05.

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 11:00:00 on 2025-09-05.

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

The current air quality in St. Helens, Oregon is 54, categorized as Moderate based on real-time data.

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

The most common pollutant in St. Helens, Oregon is PM2.5.

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 10.735 μg/m³.

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

The current PM₁₀ concentration at St. Helens, Oregon is 48.127 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 0.235 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 1.494 ppb.

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

The current ozone (O₃) concentration at St. Helens, Oregon is 19.487 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 9.674 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-09-04T14:00:00.000Z	33 \| good	6.29 \| good	28.328 \| good	14.467 \| good	0.276 \| good	10.038 \| good	0.151 \| good
2025-09-04T15:00:00.000Z	33 \| good	6.28 \| good	27.936 \| good	12.786 \| good	0.252 \| good	10.853 \| good	0.112 \| good
2025-09-04T16:00:00.000Z	33 \| good	6.293 \| good	28.38 \| good	12.538 \| good	0.356 \| good	13.335 \| good	0.235 \| good
2025-09-04T17:00:00.000Z	38 \| good	6.668 \| good	29.285 \| good	14.011 \| good	0.433 \| good	9.839 \| good	0.163 \| good
2025-09-04T18:00:00.000Z	38 \| good	6.677 \| good	29.293 \| good	14.243 \| good	0.412 \| good	8.12 \| good	0.156 \| good
2025-09-04T19:00:00.000Z	44 \| good	8.298 \| good	36.662 \| good	15.216 \| good	0.406 \| good	9.911 \| good	0.2 \| good
2025-09-04T20:00:00.000Z	44 \| good	8.483 \| good	37.697 \| good	15.229 \| good	0.429 \| good	11.422 \| good	0.232 \| good
2025-09-04T21:00:00.000Z	52 \| moderate	9.752 \| good	43.085 \| good	18.089 \| good	0.624 \| good	10.992 \| good	0.244 \| good
2025-09-04T22:00:00.000Z	52 \| moderate	10.276 \| good	45.612 \| good	22.108 \| good	0.752 \| good	10.431 \| good	0.258 \| good
2025-09-04T23:00:00.000Z	54 \| moderate	10.645 \| good	46.924 \| good	26.181 \| good	0.594 \| good	10.208 \| good	0.295 \| good
2025-09-05T00:00:00.000Z	54 \| moderate	11.173 \| good	50.823 \| good	27.488 \| good	0.564 \| good	7.647 \| good	0.214 \| good
2025-09-05T01:00:00.000Z	56 \| moderate	11.53 \| good	51.513 \| good	33.173 \| good	0.564 \| good	6.341 \| good	0.214 \| good
2025-09-05T02:00:00.000Z	56 \| moderate	12.038 \| good	54.696 \| good	34.052 \| good	0.868 \| good	8.405 \| good	0.221 \| good
2025-09-05T03:00:00.000Z	56 \| moderate	12.001 \| good	54.326 \| good	31.421 \| good	0.789 \| good	9.422 \| good	0.177 \| good
2025-09-05T04:00:00.000Z	56 \| moderate	11.96 \| good	54.181 \| good	32.111 \| good	0.627 \| good	13.45 \| good	0.251 \| good
2025-09-05T05:00:00.000Z	56 \| moderate	11.51 \| good	51.619 \| good	29.432 \| good	0.465 \| good	14.489 \| good	0.258 \| good
2025-09-05T06:00:00.000Z	52 \| moderate	10.08 \| good	44.695 \| good	24.13 \| good	0.99 \| good	13.232 \| good	0.221 \| good
2025-09-05T07:00:00.000Z	52 \| moderate	10.016 \| good	44.455 \| good	21.544 \| good	0.388 \| good	11.189 \| good	0.165 \| good
2025-09-05T08:00:00.000Z	44 \| good	8.42 \| good	37.212 \| good	17.788 \| good	0.361 \| good	11.238 \| good	0.151 \| good
2025-09-05T09:00:00.000Z	44 \| good	7.586 \| good	33.107 \| good	14.022 \| good	0.37 \| good	9.852 \| good	0.107 \| good
2025-09-05T10:00:00.000Z	38 \| good	7.125 \| good	31.265 \| good	12.844 \| good	0.369 \| good	9.642 \| good	0.107 \| good
2025-09-05T11:00:00.000Z	38 \| good	7.31 \| good	32.62 \| good	12.085 \| good	0.381 \| good	8.9 \| good	0.107 \| good
2025-09-05T12:00:00.000Z	38 \| good	7.467 \| good	33.013 \| good	11.378 \| good	0.384 \| good	10.147 \| good	0.114 \| good
2025-09-05T13:00:00.000Z	38 \| good	7.45 \| good	32.931 \| good	10.332 \| good	0.309 \| good	10.219 \| good	0.114 \| good
2025-09-05T14:00:00.000Z	44 \| good	7.825 \| good	34.547 \| good	10.106 \| good	0.459 \| good	11.78 \| good	0.17 \| good
2025-09-05T15:00:00.000Z	44 \| good	7.543 \| good	33.472 \| good	8.475 \| good	0.468 \| good	10.197 \| good	0.214 \| good
2025-09-05T16:00:00.000Z	38 \| good	7.496 \| good	32.952 \| good	10.707 \| good	0.52 \| good	9.949 \| good	0.207 \| good
2025-09-05T17:00:00.000Z	38 \| good	7.462 \| good	32.772 \| good	10.521 \| good	0.616 \| good	10.456 \| good	0.17 \| good
2025-09-05T18:00:00.000Z	38 \| good	7.437 \| good	32.622 \| good	11.701 \| good	0.698 \| good	9.321 \| good	0.175 \| good
2025-09-05T19:00:00.000Z	38 \| good	7.354 \| good	32.307 \| good	11.615 \| good	0.897 \| good	10.161 \| good	0.214 \| good
2025-09-05T20:00:00.000Z	38 \| good	7.429 \| good	32.607 \| good	11.467 \| good	0.8 \| good	10.845 \| good	0.244 \| good
2025-09-05T21:00:00.000Z	38 \| good	7.429 \| good	32.608 \| good	11.257 \| good	0.697 \| good	10.315 \| good	0.244 \| good
2025-09-05T22:00:00.000Z	38 \| good	7.36 \| good	32.39 \| good	12.127 \| good	0.818 \| good	10.317 \| good	0.276 \| good
2025-09-05T23:00:00.000Z	38 \| good	7.335 \| good	32.33 \| good	16.108 \| good	0.811 \| good	10.434 \| good	0.281 \| good
2025-09-06T00:00:00.000Z	44 \| good	7.558 \| good	33.332 \| good	15.846 \| good	0.777 \| good	8.821 \| good	0.214 \| good
2025-09-06T01:00:00.000Z	44 \| good	7.822 \| good	34.256 \| good	17.594 \| good	0.586 \| good	8.312 \| good	0.214 \| good
2025-09-06T02:00:00.000Z	44 \| good	8.462 \| good	38.055 \| good	20.042 \| good	0.558 \| good	10.366 \| good	0.221 \| good
2025-09-06T03:00:00.000Z	49 \| good	9.384 \| good	41.95 \| good	20.57 \| good	0.542 \| good	6.909 \| good	0.184 \| good
2025-09-06T04:00:00.000Z	54 \| moderate	10.735 \| good	48.127 \| good	19.487 \| good	1.494 \| good	9.674 \| good	0.235 \| good
2025-09-06T05:00:00.000Z	54 \| moderate	10.537 \| good	46.79 \| good	16.965 \| good	1.773 \| good	10.653 \| good	0.228 \| good
2025-09-06T06:00:00.000Z	54 \| moderate	10.507 \| good	46.64 \| good	16.295 \| good	1.137 \| good	10.832 \| good	0.258 \| good
2025-09-06T07:00:00.000Z	49 \| good	8.704 \| good	38.835 \| good	13.598 \| good	0.605 \| good	9.842 \| good	0.202 \| good
2025-09-06T08:00:00.000Z	38 \| good	7.44 \| good	32.815 \| good	14.491 \| good	0.479 \| good	6.6 \| good	0.119 \| good
2025-09-06T09:00:00.000Z	38 \| good	6.875 \| good	30.546 \| good	12.938 \| good	0.447 \| good	5.309 \| good	0.119 \| good
2025-09-06T10:00:00.000Z	38 \| good	6.653 \| good	29.688 \| good	12.455 \| good	0.454 \| good	3.984 \| good	0.114 \| good
2025-09-06T11:00:00.000Z	33 \| good	5.845 \| good	25.881 \| good	12.298 \| good	0.429 \| good	3.905 \| good	0.107 \| good
2025-09-06T12:00:00.000Z	27 \| good	5.277 \| good	23.076 \| good	12.996 \| good	0.356 \| good	4.513 \| good	0.1 \| good
2025-09-06T13:00:00.000Z	27 \| good	5.277 \| good	23.076 \| good	12.996 \| good	0.356 \| good	4.513 \| good	0.1 \| good
2025-09-06T06:00:00.000Z	49 \| good	8.561 \| good	37.688 \| good	21.862 \| good	0.292 \| good	7.162 \| good	0.23 \| good
2025-09-06T07:00:00.000Z	49 \| good	8.987 \| good	39.481 \| good	21.575 \| good	0.278 \| good	6.524 \| good	0.221 \| good
2025-09-06T08:00:00.000Z	52 \| moderate	9.615 \| good	42.169 \| good	21.619 \| good	0.264 \| good	5.887 \| good	0.212 \| good
2025-09-06T09:00:00.000Z	49 \| good	9.108 \| good	40.33 \| good	18.812 \| good	0.25 \| good	5.25 \| good	0.203 \| good
2025-09-06T10:00:00.000Z	49 \| good	9.106 \| good	40.43 \| good	20.77 \| good	0.237 \| good	4.719 \| good	0.197 \| good
2025-09-06T11:00:00.000Z	49 \| good	9.417 \| good	41.636 \| good	19.795 \| good	0.224 \| good	4.189 \| good	0.192 \| good
2025-09-06T12:00:00.000Z	49 \| good	8.733 \| good	38.246 \| good	22.793 \| good	0.212 \| good	3.658 \| good	0.186 \| good
2025-09-06T13:00:00.000Z	44 \| good	7.547 \| good	33.478 \| good	21.133 \| good	0.23 \| good	3.652 \| good	0.188 \| good
2025-09-06T14:00:00.000Z	38 \| good	6.809 \| good	29.644 \| good	19.984 \| good	0.248 \| good	3.646 \| good	0.19 \| good
2025-09-06T15:00:00.000Z	38 \| good	7.057 \| good	31.053 \| good	23.39 \| good	0.266 \| good	3.64 \| good	0.191 \| good
2025-09-06T16:00:00.000Z	38 \| good	7.468 \| good	32.941 \| good	24.094 \| good	0.284 \| good	3.395 \| good	0.189 \| good
2025-09-06T17:00:00.000Z	44 \| good	7.857 \| good	34.917 \| good	25.193 \| good	0.302 \| good	3.151 \| good	0.186 \| good
2025-09-06T18:00:00.000Z	49 \| good	9.164 \| good	40.936 \| good	25.069 \| good	0.319 \| good	2.907 \| good	0.183 \| good
2025-09-06T19:00:00.000Z	52 \| moderate	10.401 \| good	45.983 \| good	26.609 \| good	0.295 \| good	2.662 \| good	0.18 \| good
2025-09-06T20:00:00.000Z	54 \| moderate	11.192 \| good	50.253 \| good	30.537 \| good	0.27 \| good	2.417 \| good	0.177 \| good
2025-09-06T21:00:00.000Z	56 \| moderate	11.89 \| good	52.267 \| good	34.946 \| good	0.245 \| good	2.173 \| good	0.174 \| good
2025-09-06T22:00:00.000Z	56 \| moderate	11.678 \| good	52.022 \| good	33.657 \| good	0.221 \| good	2.232 \| good	0.174 \| good
2025-09-06T23:00:00.000Z	56 \| moderate	12.057 \| good	53.342 \| good	31.234 \| good	0.196 \| good	2.291 \| good	0.173 \| good
2025-09-07T00:00:00.000Z	52 \| moderate	10.238 \| good	45.322 \| good	26.462 \| good	0.172 \| good	2.35 \| good	0.173 \| good
2025-09-07T01:00:00.000Z	52 \| moderate	10.097 \| good	44.553 \| good	25.525 \| good	0.193 \| good	3.15 \| good	0.178 \| good
2025-09-07T02:00:00.000Z	56 \| moderate	11.604 \| good	51.285 \| good	25.804 \| good	0.215 \| good	3.95 \| good	0.184 \| good
2025-09-07T03:00:00.000Z	60 \| moderate	14.038 \| fine	62.663 \| fine	21.911 \| good	0.236 \| good	4.751 \| good	0.189 \| good
2025-09-07T04:00:00.000Z	58 \| moderate	12.853 \| fine	56.816 \| fine	19.684 \| good	0.254 \| good	5.291 \| good	0.191 \| good
2025-09-07T05:00:00.000Z	56 \| moderate	12.223 \| fine	54.541 \| good	20.507 \| good	0.271 \| good	5.832 \| good	0.192 \| good
2025-09-07T06:00:00.000Z	54 \| moderate	11.407 \| good	50.79 \| good	17.914 \| good	0.289 \| good	6.372 \| good	0.194 \| good
2025-09-07T07:00:00.000Z	52 \| moderate	10.146 \| good	44.839 \| good	22.314 \| good	0.287 \| good	5.869 \| good	0.187 \| good
2025-09-07T08:00:00.000Z	52 \| moderate	10.17 \| good	45.084 \| good	20.714 \| good	0.285 \| good	5.366 \| good	0.18 \| good
2025-09-07T09:00:00.000Z	54 \| moderate	10.58 \| good	47.175 \| good	18.954 \| good	0.283 \| good	4.863 \| good	0.173 \| good
2025-09-07T10:00:00.000Z	56 \| moderate	11.845 \| good	52.878 \| good	17.797 \| good	0.287 \| good	4.531 \| good	0.167 \| good
2025-09-07T11:00:00.000Z	58 \| moderate	12.777 \| fine	56.51 \| fine	18.642 \| good	0.291 \| good	4.198 \| good	0.162 \| good
2025-09-07T12:00:00.000Z	58 \| moderate	12.691 \| fine	55.827 \| fine	16.28 \| good	0.296 \| good	3.865 \| good	0.156 \| good
2025-09-07T13:00:00.000Z	56 \| moderate	11.723 \| good	52.117 \| good	18.318 \| good	0.328 \| good	3.818 \| good	0.155 \| good
2025-09-07T14:00:00.000Z	52 \| moderate	10.182 \| good	45.167 \| good	19.852 \| good	0.361 \| good	3.771 \| good	0.154 \| good
2025-09-07T15:00:00.000Z	49 \| good	8.614 \| good	38.071 \| good	21.84 \| good	0.394 \| good	3.723 \| good	0.153 \| good
2025-09-07T16:00:00.000Z	38 \| good	6.785 \| good	29.777 \| good	26.366 \| good	0.382 \| good	3.26 \| good	0.148 \| good
2025-09-07T17:00:00.000Z	33 \| good	5.88 \| good	25.895 \| good	26.937 \| good	0.37 \| good	2.797 \| good	0.144 \| good
2025-09-07T18:00:00.000Z	38 \| good	6.583 \| good	28.903 \| good	27.14 \| good	0.358 \| good	2.333 \| good	0.139 \| good
2025-09-07T19:00:00.000Z	38 \| good	7.387 \| good	32.846 \| good	29.963 \| good	0.309 \| good	1.995 \| good	0.138 \| good
2025-09-07T20:00:00.000Z	44 \| good	7.959 \| good	35.049 \| good	31.106 \| good	0.26 \| good	1.657 \| good	0.136 \| good
2025-09-07T21:00:00.000Z	38 \| good	7.276 \| good	32.509 \| good	31.5 \| good	0.211 \| good	1.319 \| good	0.134 \| good
2025-09-07T22:00:00.000Z	38 \| good	6.745 \| good	29.893 \| good	28.399 \| good	0.194 \| good	1.341 \| good	0.133 \| good
2025-09-07T23:00:00.000Z	38 \| good	6.579 \| good	29.283 \| good	27.508 \| good	0.177 \| good	1.363 \| good	0.132 \| good
2025-09-08T00:00:00.000Z	60 \| moderate	13.995 \| fine	17.161 \| good	36.083 \| good	0.158 \| good	1.392 \| good	0.13 \| good
2025-09-08T01:00:00.000Z	33 \| good	6.438 \| good	27.823 \| good	22.557 \| good	0.172 \| good	2.572 \| good	0.139 \| good
2025-09-08T02:00:00.000Z	33 \| good	6.116 \| good	26.644 \| good	23.837 \| good	0.183 \| good	3.759 \| good	0.148 \| good
2025-09-08T03:00:00.000Z	33 \| good	6.037 \| good	26.242 \| good	24.676 \| good	0.195 \| good	4.947 \| good	0.157 \| good
2025-09-08T04:00:00.000Z	33 \| good	6.367 \| good	27.392 \| good	22.076 \| good	0.227 \| good	5.637 \| good	0.162 \| good
2025-09-08T05:00:00.000Z	33 \| good	6.349 \| good	27.331 \| good	23.005 \| good	0.258 \| good	6.327 \| good	0.167 \| good

St. Helens, Oregon live air quality index now

Major air pollutants in St. Helens, Oregon

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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

Air quality in nearby cities

Ridgefield, Washington

Felida, Washington

Mount Vista, Washington

Salmon Creek, Washington

Battle Ground, Washington

Hazel Dell, Washington

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Frequently asked questions

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

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

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

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

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

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

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 St. Helens, Oregon?

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

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

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

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