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

The current PM10 concentration at St. Helens, Oregon is 24.635 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 0.2 ppb.

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

The current ozone (O3) concentration at St. Helens, Oregon is 23.23 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 9.523 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 5.581 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)

5.58 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

24.64 μg/m³

155

255

425

605+

Ozone (O₃)

23.23 ppb

201

201+

Sulfur Dioxide (SO₂)

0.20 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

9.52 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.26 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
2026-04-22T09:00:00.000Z	21 \| good	1.879 \| good	8.194 \| good	22.551 \| good	0.1 \| good	6.735 \| good	0.178 \| good
2026-04-22T10:00:00.000Z	16 \| good	1.888 \| good	8.323 \| good	17.153 \| good	0.244 \| good	6.354 \| good	0.178 \| good
2026-04-22T11:00:00.000Z	17 \| good	2.221 \| good	9.383 \| good	18.111 \| good	0.241 \| good	3.766 \| good	0.139 \| good
2026-04-22T12:00:00.000Z	24 \| good	2.137 \| good	9.036 \| good	26.042 \| good	0.239 \| good	5.169 \| good	0.178 \| good
2026-04-22T13:00:00.000Z	19 \| good	1.941 \| good	8.211 \| good	21.138 \| good	0.228 \| good	5.031 \| good	0.178 \| good
2026-04-22T14:00:00.000Z	24 \| good	1.992 \| good	8.181 \| good	26.001 \| good	0.3 \| good	8.203 \| good	0.178 \| good
2026-04-22T15:00:00.000Z	24 \| good	2.136 \| good	9.311 \| good	26.08 \| good	0.238 \| good	9.314 \| good	0.178 \| good
2026-04-22T16:00:00.000Z	23 \| good	2.198 \| good	9.447 \| good	24.74 \| good	0.161 \| good	10.482 \| good	0.178 \| good
2026-04-22T17:00:00.000Z	24 \| good	2.267 \| good	9.757 \| good	25.655 \| good	0.35 \| good	10.185 \| good	0.183 \| good
2026-04-22T18:00:00.000Z	19 \| good	2.207 \| good	9.476 \| good	21.377 \| good	0.299 \| good	10.282 \| good	0.183 \| good
2026-04-22T19:00:00.000Z	22 \| good	2.233 \| good	9.604 \| good	23.619 \| good	0.314 \| good	10.205 \| good	0.183 \| good
2026-04-22T20:00:00.000Z	27 \| good	2.274 \| good	9.71 \| good	28.843 \| good	0.138 \| good	7.774 \| good	0.183 \| good
2026-04-22T21:00:00.000Z	27 \| good	2.202 \| good	9.415 \| good	29.371 \| good	0.1 \| good	9.241 \| good	0.183 \| good
2026-04-22T22:00:00.000Z	27 \| good	2.205 \| good	9.393 \| good	28.578 \| good	0.121 \| good	7.739 \| good	0.183 \| good
2026-04-22T23:00:00.000Z	26 \| good	2.131 \| good	8.978 \| good	28.243 \| good	0.121 \| good	3.996 \| good	0.144 \| good
2026-04-23T00:00:00.000Z	29 \| good	2.189 \| good	9.402 \| good	31.31 \| good	0.1 \| good	5.15 \| good	0.183 \| good
2026-04-23T01:00:00.000Z	26 \| good	2.261 \| good	9.644 \| good	28.252 \| good	0.1 \| good	5.214 \| good	0.183 \| good
2026-04-23T02:00:00.000Z	29 \| good	3.078 \| good	12.903 \| good	30.727 \| good	0.139 \| good	6.699 \| good	0.222 \| good
2026-04-23T03:00:00.000Z	31 \| good	3.728 \| good	16.421 \| good	32.908 \| good	0.101 \| good	5.509 \| good	0.183 \| good
2026-04-23T04:00:00.000Z	29 \| good	3.904 \| good	17.457 \| good	31.409 \| good	0.145 \| good	5.233 \| good	0.183 \| good
2026-04-23T05:00:00.000Z	26 \| good	3.888 \| good	16.745 \| good	28.483 \| good	0.178 \| good	6.56 \| good	0.183 \| good
2026-04-23T06:00:00.000Z	28 \| good	4.032 \| good	17.426 \| good	29.728 \| good	0.138 \| good	6.731 \| good	0.183 \| good
2026-04-23T07:00:00.000Z	26 \| good	4.295 \| good	18.865 \| good	28.393 \| good	0.159 \| good	6.068 \| good	0.183 \| good
2026-04-23T08:00:00.000Z	25 \| good	4.166 \| good	18.498 \| good	27.299 \| good	0.158 \| good	4.062 \| good	0.144 \| good
2026-04-23T09:00:00.000Z	24 \| good	4.133 \| good	18.339 \| good	26.277 \| good	0.157 \| good	5.13 \| good	0.144 \| good
2026-04-23T10:00:00.000Z	24 \| good	4.19 \| good	18.704 \| good	26.267 \| good	0.139 \| good	4.508 \| good	0.144 \| good
2026-04-23T11:00:00.000Z	27 \| good	4.503 \| good	20.036 \| good	25.057 \| good	0.16 \| good	3.843 \| good	0.144 \| good
2026-04-23T12:00:00.000Z	27 \| good	4.717 \| good	21.142 \| good	22.013 \| good	0.119 \| good	4.707 \| good	0.144 \| good
2026-04-23T13:00:00.000Z	27 \| good	4.942 \| good	21.535 \| good	23.145 \| good	0.155 \| good	4.677 \| good	0.144 \| good
2026-04-23T14:00:00.000Z	27 \| good	5.166 \| good	22.544 \| good	20.592 \| good	0.22 \| good	8.694 \| good	0.144 \| good
2026-04-23T15:00:00.000Z	27 \| good	5.437 \| good	23.636 \| good	22.145 \| good	0.201 \| good	8.58 \| good	0.151 \| good
2026-04-23T16:00:00.000Z	33 \| good	5.656 \| good	24.395 \| good	23.72 \| good	0.216 \| good	8.378 \| good	0.235 \| good
2026-04-23T17:00:00.000Z	33 \| good	5.749 \| good	24.941 \| good	26.274 \| good	0.1 \| good	6.793 \| good	0.19 \| good
2026-04-23T18:00:00.000Z	33 \| good	5.859 \| good	25.531 \| good	26.497 \| good	0.101 \| good	6.253 \| good	0.183 \| good
2026-04-23T19:00:00.000Z	33 \| good	5.834 \| good	25.333 \| good	28.587 \| good	0.1 \| good	7.128 \| good	0.183 \| good
2026-04-23T20:00:00.000Z	33 \| good	5.79 \| good	25.349 \| good	30.084 \| good	0.1 \| good	6.908 \| good	0.191 \| good
2026-04-23T21:00:00.000Z	29 \| good	5.465 \| good	24.077 \| good	30.85 \| good	0.12 \| good	6.833 \| good	0.191 \| good
2026-04-23T22:00:00.000Z	31 \| good	5.317 \| good	23.071 \| good	32.883 \| good	0.1 \| good	5.911 \| good	0.191 \| good
2026-04-23T23:00:00.000Z	31 \| good	5.168 \| good	22.806 \| good	34.376 \| good	0.1 \| good	4.905 \| good	0.198 \| good
2026-04-24T00:00:00.000Z	31 \| good	5.118 \| good	22.215 \| good	34.176 \| good	0.141 \| good	5.756 \| good	0.191 \| good
2026-04-24T01:00:00.000Z	33 \| good	5.105 \| good	22.487 \| good	35.894 \| good	0.1 \| good	5.417 \| good	0.191 \| good
2026-04-24T02:00:00.000Z	34 \| good	5.023 \| good	22.41 \| good	37.148 \| good	0.1 \| good	4.27 \| good	0.191 \| good
2026-04-24T03:00:00.000Z	38 \| good	7.143 \| good	31.566 \| good	32.076 \| good	0.293 \| good	6.676 \| good	0.185 \| good
2026-04-24T04:00:00.000Z	32 \| good	5.041 \| good	22.024 \| good	34.825 \| good	0.155 \| good	5.776 \| good	0.168 \| good
2026-04-24T05:00:00.000Z	29 \| good	5.116 \| good	22.439 \| good	30.99 \| good	0.121 \| good	7.82 \| good	0.203 \| good
2026-04-24T06:00:00.000Z	27 \| good	5.22 \| good	23.023 \| good	25.079 \| good	0.212 \| good	10.329 \| good	0.261 \| good
2026-04-24T07:00:00.000Z	33 \| good	5.581 \| good	24.635 \| good	23.23 \| good	0.2 \| good	9.523 \| good	0.256 \| good
2026-04-24T08:00:00.000Z	33 \| good	5.789 \| good	25.347 \| good	22.567 \| good	0.18 \| good	9.519 \| good	0.279 \| good
2026-04-24T08:00:00.000Z	33 \| good	5.581 \| good	24.635 \| good	23.23 \| good	0.2 \| good	9.523 \| good	0.256 \| good
2026-04-24T09:00:00.000Z	38 \| good	6.535 \| good	29.169 \| good	20.479 \| good	0.266 \| good	7.498 \| good	0.2 \| good
2026-04-24T10:00:00.000Z	27 \| good	5.255 \| good	23.085 \| good	19.511 \| good	0.255 \| good	6.327 \| good	0.189 \| good
2026-04-24T11:00:00.000Z	22 \| good	4.322 \| good	18.789 \| good	18.997 \| good	0.243 \| good	5.155 \| good	0.177 \| good
2026-04-24T12:00:00.000Z	27 \| good	4.767 \| good	21.272 \| good	18.304 \| good	0.232 \| good	3.984 \| good	0.166 \| good
2026-04-24T13:00:00.000Z	44 \| good	7.525 \| good	33.521 \| good	15.687 \| good	0.262 \| good	3.608 \| good	0.168 \| good
2026-04-24T14:00:00.000Z	38 \| good	7.11 \| good	31.036 \| good	15.152 \| good	0.293 \| good	3.233 \| good	0.17 \| good
2026-04-24T15:00:00.000Z	38 \| good	7.225 \| good	32.017 \| good	20.516 \| good	0.323 \| good	2.858 \| good	0.172 \| good
2026-04-24T16:00:00.000Z	33 \| good	5.731 \| good	25.141 \| good	28.252 \| good	0.336 \| good	2.403 \| good	0.162 \| good
2026-04-24T17:00:00.000Z	31 \| good	3.152 \| good	13.417 \| good	32.949 \| good	0.349 \| good	1.948 \| good	0.151 \| good
2026-04-24T18:00:00.000Z	31 \| good	2.055 \| good	8.48 \| good	33.754 \| good	0.363 \| good	1.493 \| good	0.141 \| good
2026-04-24T19:00:00.000Z	33 \| good	1.671 \| good	7.003 \| good	35.561 \| good	0.307 \| good	1.217 \| good	0.135 \| good
2026-04-24T20:00:00.000Z	35 \| good	1.674 \| good	7.163 \| good	37.673 \| good	0.251 \| good	0.941 \| good	0.129 \| good
2026-04-24T21:00:00.000Z	35 \| good	2.081 \| good	8.809 \| good	37.881 \| good	0.195 \| good	0.666 \| good	0.123 \| good
2026-04-24T22:00:00.000Z	37 \| good	2.835 \| good	11.912 \| good	40.224 \| good	0.194 \| good	0.713 \| good	0.12 \| good
2026-04-24T23:00:00.000Z	40 \| good	3.526 \| good	15.067 \| good	43.13 \| good	0.192 \| good	0.76 \| good	0.118 \| good
2026-04-25T00:00:00.000Z	41 \| good	4.018 \| good	17.086 \| good	43.695 \| good	0.191 \| good	0.808 \| good	0.116 \| good
2026-04-25T01:00:00.000Z	38 \| good	3.928 \| good	16.607 \| good	40.788 \| good	0.21 \| good	1.563 \| good	0.12 \| good
2026-04-25T02:00:00.000Z	34 \| good	3.616 \| good	15.357 \| good	37.115 \| good	0.229 \| good	2.318 \| good	0.125 \| good
2026-04-25T03:00:00.000Z	34 \| good	2.866 \| good	12.079 \| good	36.593 \| good	0.249 \| good	3.074 \| good	0.13 \| good
2026-04-25T04:00:00.000Z	27 \| good	3.925 \| good	16.857 \| good	29.121 \| good	0.27 \| good	3.642 \| good	0.137 \| good
2026-04-25T05:00:00.000Z	27 \| good	4.77 \| good	21.172 \| good	28.87 \| good	0.292 \| good	4.211 \| good	0.143 \| good
2026-04-25T06:00:00.000Z	27 \| good	5.466 \| good	24.104 \| good	26.614 \| good	0.314 \| good	4.78 \| good	0.149 \| good
2026-04-25T07:00:00.000Z	27 \| good	5.081 \| good	22.151 \| good	27.365 \| good	0.31 \| good	4.766 \| good	0.151 \| good
2026-04-25T08:00:00.000Z	27 \| good	5.019 \| good	21.904 \| good	24.358 \| good	0.307 \| good	4.752 \| good	0.153 \| good
2026-04-25T09:00:00.000Z	27 \| good	4.762 \| good	20.884 \| good	24.342 \| good	0.304 \| good	4.738 \| good	0.156 \| good
2026-04-25T10:00:00.000Z	27 \| good	4.843 \| good	21.067 \| good	23.684 \| good	0.303 \| good	4.552 \| good	0.154 \| good
2026-04-25T11:00:00.000Z	27 \| good	4.776 \| good	21.221 \| good	21.019 \| good	0.303 \| good	4.366 \| good	0.153 \| good
2026-04-25T12:00:00.000Z	27 \| good	5.332 \| good	23.165 \| good	19.234 \| good	0.302 \| good	4.18 \| good	0.151 \| good
2026-04-25T13:00:00.000Z	33 \| good	5.996 \| good	26.277 \| good	19.061 \| good	0.292 \| good	3.907 \| good	0.154 \| good
2026-04-25T14:00:00.000Z	38 \| good	7.068 \| good	31.157 \| good	17.386 \| good	0.283 \| good	3.634 \| good	0.157 \| good
2026-04-25T15:00:00.000Z	33 \| good	5.664 \| good	24.899 \| good	21.177 \| good	0.273 \| good	3.36 \| good	0.16 \| good
2026-04-25T16:00:00.000Z	27 \| good	4.945 \| good	21.543 \| good	23.074 \| good	0.332 \| good	2.768 \| good	0.148 \| good
2026-04-25T17:00:00.000Z	24 \| good	4.059 \| good	16.951 \| good	26.372 \| good	0.39 \| good	2.176 \| good	0.137 \| good
2026-04-25T18:00:00.000Z	29 \| good	3.212 \| good	13.653 \| good	30.898 \| good	0.449 \| good	1.584 \| good	0.126 \| good
2026-04-25T19:00:00.000Z	31 \| good	2.044 \| good	8.935 \| good	33.114 \| good	0.399 \| good	1.305 \| good	0.123 \| good
2026-04-25T20:00:00.000Z	35 \| good	2.372 \| good	9.839 \| good	38.06 \| good	0.349 \| good	1.026 \| good	0.12 \| good
2026-04-25T21:00:00.000Z	35 \| good	2.148 \| good	9.143 \| good	37.981 \| good	0.299 \| good	0.746 \| good	0.117 \| good
2026-04-25T22:00:00.000Z	35 \| good	1.819 \| good	7.751 \| good	37.875 \| good	0.291 \| good	0.789 \| good	0.117 \| good
2026-04-25T23:00:00.000Z	37 \| good	1.398 \| good	5.798 \| good	39.728 \| good	0.284 \| good	0.831 \| good	0.117 \| good
2026-04-26T00:00:00.000Z	37 \| good	2.064 \| good	9.026 \| good	39.517 \| good	0.277 \| good	0.874 \| good	0.118 \| good
2026-04-26T01:00:00.000Z	36 \| good	2.562 \| good	10.806 \| good	39.278 \| good	0.303 \| good	2.347 \| good	0.132 \| good
2026-04-26T02:00:00.000Z	33 \| good	2.882 \| good	12.648 \| good	35.548 \| good	0.329 \| good	3.82 \| good	0.147 \| good
2026-04-26T03:00:00.000Z	35 \| good	3.344 \| good	14.527 \| good	37.773 \| good	0.355 \| good	5.293 \| good	0.161 \| good
2026-04-26T04:00:00.000Z	24 \| good	3.386 \| good	14.636 \| good	26.489 \| good	0.395 \| good	6.445 \| good	0.174 \| good
2026-04-26T05:00:00.000Z	26 \| good	3.405 \| good	14.692 \| good	27.76 \| good	0.435 \| good	7.597 \| good	0.187 \| good
2026-04-26T06:00:00.000Z	38 \| good	7.209 \| good	7.91 \| good	35.504 \| good	0.467 \| good	8.517 \| good	0.198 \| good
2026-04-26T07:00:00.000Z	29 \| good	2.368 \| good	9.89 \| good	31.178 \| good	0.447 \| good	8.339 \| good	0.198 \| good
2026-04-26T08:00:00.000Z	29 \| good	2.386 \| good	10.349 \| good	30.837 \| good	0.42 \| good	7.931 \| good	0.197 \| good

St. Helens

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

0.24ppm

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 03:00:00 on 2026-04-24.

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 10:00:00 on 2026-04-23.

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

The current air quality in St. Helens, Oregon is 33, 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 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 5.581 μg/m³.

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

The current PM₁₀ concentration at St. Helens, Oregon is 24.635 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 0.256 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 0.2 ppb.

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

The current ozone (O₃) concentration at St. Helens, Oregon is 23.23 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 9.523 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-04-22T09:00:00.000Z	21 \| good	1.879 \| good	8.194 \| good	22.551 \| good	0.1 \| good	6.735 \| good	0.178 \| good
2026-04-22T10:00:00.000Z	16 \| good	1.888 \| good	8.323 \| good	17.153 \| good	0.244 \| good	6.354 \| good	0.178 \| good
2026-04-22T11:00:00.000Z	17 \| good	2.221 \| good	9.383 \| good	18.111 \| good	0.241 \| good	3.766 \| good	0.139 \| good
2026-04-22T12:00:00.000Z	24 \| good	2.137 \| good	9.036 \| good	26.042 \| good	0.239 \| good	5.169 \| good	0.178 \| good
2026-04-22T13:00:00.000Z	19 \| good	1.941 \| good	8.211 \| good	21.138 \| good	0.228 \| good	5.031 \| good	0.178 \| good
2026-04-22T14:00:00.000Z	24 \| good	1.992 \| good	8.181 \| good	26.001 \| good	0.3 \| good	8.203 \| good	0.178 \| good
2026-04-22T15:00:00.000Z	24 \| good	2.136 \| good	9.311 \| good	26.08 \| good	0.238 \| good	9.314 \| good	0.178 \| good
2026-04-22T16:00:00.000Z	23 \| good	2.198 \| good	9.447 \| good	24.74 \| good	0.161 \| good	10.482 \| good	0.178 \| good
2026-04-22T17:00:00.000Z	24 \| good	2.267 \| good	9.757 \| good	25.655 \| good	0.35 \| good	10.185 \| good	0.183 \| good
2026-04-22T18:00:00.000Z	19 \| good	2.207 \| good	9.476 \| good	21.377 \| good	0.299 \| good	10.282 \| good	0.183 \| good
2026-04-22T19:00:00.000Z	22 \| good	2.233 \| good	9.604 \| good	23.619 \| good	0.314 \| good	10.205 \| good	0.183 \| good
2026-04-22T20:00:00.000Z	27 \| good	2.274 \| good	9.71 \| good	28.843 \| good	0.138 \| good	7.774 \| good	0.183 \| good
2026-04-22T21:00:00.000Z	27 \| good	2.202 \| good	9.415 \| good	29.371 \| good	0.1 \| good	9.241 \| good	0.183 \| good
2026-04-22T22:00:00.000Z	27 \| good	2.205 \| good	9.393 \| good	28.578 \| good	0.121 \| good	7.739 \| good	0.183 \| good
2026-04-22T23:00:00.000Z	26 \| good	2.131 \| good	8.978 \| good	28.243 \| good	0.121 \| good	3.996 \| good	0.144 \| good
2026-04-23T00:00:00.000Z	29 \| good	2.189 \| good	9.402 \| good	31.31 \| good	0.1 \| good	5.15 \| good	0.183 \| good
2026-04-23T01:00:00.000Z	26 \| good	2.261 \| good	9.644 \| good	28.252 \| good	0.1 \| good	5.214 \| good	0.183 \| good
2026-04-23T02:00:00.000Z	29 \| good	3.078 \| good	12.903 \| good	30.727 \| good	0.139 \| good	6.699 \| good	0.222 \| good
2026-04-23T03:00:00.000Z	31 \| good	3.728 \| good	16.421 \| good	32.908 \| good	0.101 \| good	5.509 \| good	0.183 \| good
2026-04-23T04:00:00.000Z	29 \| good	3.904 \| good	17.457 \| good	31.409 \| good	0.145 \| good	5.233 \| good	0.183 \| good
2026-04-23T05:00:00.000Z	26 \| good	3.888 \| good	16.745 \| good	28.483 \| good	0.178 \| good	6.56 \| good	0.183 \| good
2026-04-23T06:00:00.000Z	28 \| good	4.032 \| good	17.426 \| good	29.728 \| good	0.138 \| good	6.731 \| good	0.183 \| good
2026-04-23T07:00:00.000Z	26 \| good	4.295 \| good	18.865 \| good	28.393 \| good	0.159 \| good	6.068 \| good	0.183 \| good
2026-04-23T08:00:00.000Z	25 \| good	4.166 \| good	18.498 \| good	27.299 \| good	0.158 \| good	4.062 \| good	0.144 \| good
2026-04-23T09:00:00.000Z	24 \| good	4.133 \| good	18.339 \| good	26.277 \| good	0.157 \| good	5.13 \| good	0.144 \| good
2026-04-23T10:00:00.000Z	24 \| good	4.19 \| good	18.704 \| good	26.267 \| good	0.139 \| good	4.508 \| good	0.144 \| good
2026-04-23T11:00:00.000Z	27 \| good	4.503 \| good	20.036 \| good	25.057 \| good	0.16 \| good	3.843 \| good	0.144 \| good
2026-04-23T12:00:00.000Z	27 \| good	4.717 \| good	21.142 \| good	22.013 \| good	0.119 \| good	4.707 \| good	0.144 \| good
2026-04-23T13:00:00.000Z	27 \| good	4.942 \| good	21.535 \| good	23.145 \| good	0.155 \| good	4.677 \| good	0.144 \| good
2026-04-23T14:00:00.000Z	27 \| good	5.166 \| good	22.544 \| good	20.592 \| good	0.22 \| good	8.694 \| good	0.144 \| good
2026-04-23T15:00:00.000Z	27 \| good	5.437 \| good	23.636 \| good	22.145 \| good	0.201 \| good	8.58 \| good	0.151 \| good
2026-04-23T16:00:00.000Z	33 \| good	5.656 \| good	24.395 \| good	23.72 \| good	0.216 \| good	8.378 \| good	0.235 \| good
2026-04-23T17:00:00.000Z	33 \| good	5.749 \| good	24.941 \| good	26.274 \| good	0.1 \| good	6.793 \| good	0.19 \| good
2026-04-23T18:00:00.000Z	33 \| good	5.859 \| good	25.531 \| good	26.497 \| good	0.101 \| good	6.253 \| good	0.183 \| good
2026-04-23T19:00:00.000Z	33 \| good	5.834 \| good	25.333 \| good	28.587 \| good	0.1 \| good	7.128 \| good	0.183 \| good
2026-04-23T20:00:00.000Z	33 \| good	5.79 \| good	25.349 \| good	30.084 \| good	0.1 \| good	6.908 \| good	0.191 \| good
2026-04-23T21:00:00.000Z	29 \| good	5.465 \| good	24.077 \| good	30.85 \| good	0.12 \| good	6.833 \| good	0.191 \| good
2026-04-23T22:00:00.000Z	31 \| good	5.317 \| good	23.071 \| good	32.883 \| good	0.1 \| good	5.911 \| good	0.191 \| good
2026-04-23T23:00:00.000Z	31 \| good	5.168 \| good	22.806 \| good	34.376 \| good	0.1 \| good	4.905 \| good	0.198 \| good
2026-04-24T00:00:00.000Z	31 \| good	5.118 \| good	22.215 \| good	34.176 \| good	0.141 \| good	5.756 \| good	0.191 \| good
2026-04-24T01:00:00.000Z	33 \| good	5.105 \| good	22.487 \| good	35.894 \| good	0.1 \| good	5.417 \| good	0.191 \| good
2026-04-24T02:00:00.000Z	34 \| good	5.023 \| good	22.41 \| good	37.148 \| good	0.1 \| good	4.27 \| good	0.191 \| good
2026-04-24T03:00:00.000Z	38 \| good	7.143 \| good	31.566 \| good	32.076 \| good	0.293 \| good	6.676 \| good	0.185 \| good
2026-04-24T04:00:00.000Z	32 \| good	5.041 \| good	22.024 \| good	34.825 \| good	0.155 \| good	5.776 \| good	0.168 \| good
2026-04-24T05:00:00.000Z	29 \| good	5.116 \| good	22.439 \| good	30.99 \| good	0.121 \| good	7.82 \| good	0.203 \| good
2026-04-24T06:00:00.000Z	27 \| good	5.22 \| good	23.023 \| good	25.079 \| good	0.212 \| good	10.329 \| good	0.261 \| good
2026-04-24T07:00:00.000Z	33 \| good	5.581 \| good	24.635 \| good	23.23 \| good	0.2 \| good	9.523 \| good	0.256 \| good
2026-04-24T08:00:00.000Z	33 \| good	5.789 \| good	25.347 \| good	22.567 \| good	0.18 \| good	9.519 \| good	0.279 \| good
2026-04-24T08:00:00.000Z	33 \| good	5.581 \| good	24.635 \| good	23.23 \| good	0.2 \| good	9.523 \| good	0.256 \| good
2026-04-24T09:00:00.000Z	38 \| good	6.535 \| good	29.169 \| good	20.479 \| good	0.266 \| good	7.498 \| good	0.2 \| good
2026-04-24T10:00:00.000Z	27 \| good	5.255 \| good	23.085 \| good	19.511 \| good	0.255 \| good	6.327 \| good	0.189 \| good
2026-04-24T11:00:00.000Z	22 \| good	4.322 \| good	18.789 \| good	18.997 \| good	0.243 \| good	5.155 \| good	0.177 \| good
2026-04-24T12:00:00.000Z	27 \| good	4.767 \| good	21.272 \| good	18.304 \| good	0.232 \| good	3.984 \| good	0.166 \| good
2026-04-24T13:00:00.000Z	44 \| good	7.525 \| good	33.521 \| good	15.687 \| good	0.262 \| good	3.608 \| good	0.168 \| good
2026-04-24T14:00:00.000Z	38 \| good	7.11 \| good	31.036 \| good	15.152 \| good	0.293 \| good	3.233 \| good	0.17 \| good
2026-04-24T15:00:00.000Z	38 \| good	7.225 \| good	32.017 \| good	20.516 \| good	0.323 \| good	2.858 \| good	0.172 \| good
2026-04-24T16:00:00.000Z	33 \| good	5.731 \| good	25.141 \| good	28.252 \| good	0.336 \| good	2.403 \| good	0.162 \| good
2026-04-24T17:00:00.000Z	31 \| good	3.152 \| good	13.417 \| good	32.949 \| good	0.349 \| good	1.948 \| good	0.151 \| good
2026-04-24T18:00:00.000Z	31 \| good	2.055 \| good	8.48 \| good	33.754 \| good	0.363 \| good	1.493 \| good	0.141 \| good
2026-04-24T19:00:00.000Z	33 \| good	1.671 \| good	7.003 \| good	35.561 \| good	0.307 \| good	1.217 \| good	0.135 \| good
2026-04-24T20:00:00.000Z	35 \| good	1.674 \| good	7.163 \| good	37.673 \| good	0.251 \| good	0.941 \| good	0.129 \| good
2026-04-24T21:00:00.000Z	35 \| good	2.081 \| good	8.809 \| good	37.881 \| good	0.195 \| good	0.666 \| good	0.123 \| good
2026-04-24T22:00:00.000Z	37 \| good	2.835 \| good	11.912 \| good	40.224 \| good	0.194 \| good	0.713 \| good	0.12 \| good
2026-04-24T23:00:00.000Z	40 \| good	3.526 \| good	15.067 \| good	43.13 \| good	0.192 \| good	0.76 \| good	0.118 \| good
2026-04-25T00:00:00.000Z	41 \| good	4.018 \| good	17.086 \| good	43.695 \| good	0.191 \| good	0.808 \| good	0.116 \| good
2026-04-25T01:00:00.000Z	38 \| good	3.928 \| good	16.607 \| good	40.788 \| good	0.21 \| good	1.563 \| good	0.12 \| good
2026-04-25T02:00:00.000Z	34 \| good	3.616 \| good	15.357 \| good	37.115 \| good	0.229 \| good	2.318 \| good	0.125 \| good
2026-04-25T03:00:00.000Z	34 \| good	2.866 \| good	12.079 \| good	36.593 \| good	0.249 \| good	3.074 \| good	0.13 \| good
2026-04-25T04:00:00.000Z	27 \| good	3.925 \| good	16.857 \| good	29.121 \| good	0.27 \| good	3.642 \| good	0.137 \| good
2026-04-25T05:00:00.000Z	27 \| good	4.77 \| good	21.172 \| good	28.87 \| good	0.292 \| good	4.211 \| good	0.143 \| good
2026-04-25T06:00:00.000Z	27 \| good	5.466 \| good	24.104 \| good	26.614 \| good	0.314 \| good	4.78 \| good	0.149 \| good
2026-04-25T07:00:00.000Z	27 \| good	5.081 \| good	22.151 \| good	27.365 \| good	0.31 \| good	4.766 \| good	0.151 \| good
2026-04-25T08:00:00.000Z	27 \| good	5.019 \| good	21.904 \| good	24.358 \| good	0.307 \| good	4.752 \| good	0.153 \| good
2026-04-25T09:00:00.000Z	27 \| good	4.762 \| good	20.884 \| good	24.342 \| good	0.304 \| good	4.738 \| good	0.156 \| good
2026-04-25T10:00:00.000Z	27 \| good	4.843 \| good	21.067 \| good	23.684 \| good	0.303 \| good	4.552 \| good	0.154 \| good
2026-04-25T11:00:00.000Z	27 \| good	4.776 \| good	21.221 \| good	21.019 \| good	0.303 \| good	4.366 \| good	0.153 \| good
2026-04-25T12:00:00.000Z	27 \| good	5.332 \| good	23.165 \| good	19.234 \| good	0.302 \| good	4.18 \| good	0.151 \| good
2026-04-25T13:00:00.000Z	33 \| good	5.996 \| good	26.277 \| good	19.061 \| good	0.292 \| good	3.907 \| good	0.154 \| good
2026-04-25T14:00:00.000Z	38 \| good	7.068 \| good	31.157 \| good	17.386 \| good	0.283 \| good	3.634 \| good	0.157 \| good
2026-04-25T15:00:00.000Z	33 \| good	5.664 \| good	24.899 \| good	21.177 \| good	0.273 \| good	3.36 \| good	0.16 \| good
2026-04-25T16:00:00.000Z	27 \| good	4.945 \| good	21.543 \| good	23.074 \| good	0.332 \| good	2.768 \| good	0.148 \| good
2026-04-25T17:00:00.000Z	24 \| good	4.059 \| good	16.951 \| good	26.372 \| good	0.39 \| good	2.176 \| good	0.137 \| good
2026-04-25T18:00:00.000Z	29 \| good	3.212 \| good	13.653 \| good	30.898 \| good	0.449 \| good	1.584 \| good	0.126 \| good
2026-04-25T19:00:00.000Z	31 \| good	2.044 \| good	8.935 \| good	33.114 \| good	0.399 \| good	1.305 \| good	0.123 \| good
2026-04-25T20:00:00.000Z	35 \| good	2.372 \| good	9.839 \| good	38.06 \| good	0.349 \| good	1.026 \| good	0.12 \| good
2026-04-25T21:00:00.000Z	35 \| good	2.148 \| good	9.143 \| good	37.981 \| good	0.299 \| good	0.746 \| good	0.117 \| good
2026-04-25T22:00:00.000Z	35 \| good	1.819 \| good	7.751 \| good	37.875 \| good	0.291 \| good	0.789 \| good	0.117 \| good
2026-04-25T23:00:00.000Z	37 \| good	1.398 \| good	5.798 \| good	39.728 \| good	0.284 \| good	0.831 \| good	0.117 \| good
2026-04-26T00:00:00.000Z	37 \| good	2.064 \| good	9.026 \| good	39.517 \| good	0.277 \| good	0.874 \| good	0.118 \| good
2026-04-26T01:00:00.000Z	36 \| good	2.562 \| good	10.806 \| good	39.278 \| good	0.303 \| good	2.347 \| good	0.132 \| good
2026-04-26T02:00:00.000Z	33 \| good	2.882 \| good	12.648 \| good	35.548 \| good	0.329 \| good	3.82 \| good	0.147 \| good
2026-04-26T03:00:00.000Z	35 \| good	3.344 \| good	14.527 \| good	37.773 \| good	0.355 \| good	5.293 \| good	0.161 \| good
2026-04-26T04:00:00.000Z	24 \| good	3.386 \| good	14.636 \| good	26.489 \| good	0.395 \| good	6.445 \| good	0.174 \| good
2026-04-26T05:00:00.000Z	26 \| good	3.405 \| good	14.692 \| good	27.76 \| good	0.435 \| good	7.597 \| good	0.187 \| good
2026-04-26T06:00:00.000Z	38 \| good	7.209 \| good	7.91 \| good	35.504 \| good	0.467 \| good	8.517 \| good	0.198 \| good
2026-04-26T07:00:00.000Z	29 \| good	2.368 \| good	9.89 \| good	31.178 \| good	0.447 \| good	8.339 \| good	0.198 \| good
2026-04-26T08:00:00.000Z	29 \| good	2.386 \| good	10.349 \| good	30.837 \| good	0.42 \| good	7.931 \| good	0.197 \| 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)

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

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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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Air quality levels in US

Frequently asked questions

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

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

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

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?