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

The current PM10 concentration at St. Helens, Oregon is 17.04 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 0.167 ppb.

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

The current ozone (O3) concentration at St. Helens, Oregon is 9.311 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 11.467 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 3.941 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)

3.94 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

17.04 μg/m³

155

255

425

605+

Ozone (O₃)

9.31 ppb

201

201+

Sulfur Dioxide (SO₂)

0.17 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

11.47 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.30 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

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
2025-12-11T04:00:00.000Z	19 \| good	1.623 \| good	6.727 \| good	20.588 \| good	0.212 \| good	3.361 \| good	0.144 \| good
2025-12-11T05:00:00.000Z	20 \| good	1.757 \| good	7.336 \| good	22.414 \| good	0.233 \| good	2.238 \| good	0.107 \| good
2025-12-11T06:00:00.000Z	22 \| good	1.792 \| good	7.578 \| good	24.228 \| good	0.293 \| good	2.879 \| good	0.107 \| good
2025-12-11T07:00:00.000Z	19 \| good	1.778 \| good	7.428 \| good	21.249 \| good	0.235 \| good	3.044 \| good	0.107 \| good
2025-12-11T08:00:00.000Z	21 \| good	1.769 \| good	7.428 \| good	22.663 \| good	0.235 \| good	3.434 \| good	0.107 \| good
2025-12-11T09:00:00.000Z	21 \| good	1.732 \| good	7.21 \| good	22.797 \| good	0.254 \| good	3.559 \| good	0.107 \| good
2025-12-11T10:00:00.000Z	18 \| good	1.702 \| good	7.053 \| good	19.176 \| good	0.254 \| good	2.701 \| good	0.107 \| good
2025-12-11T11:00:00.000Z	23 \| good	1.723 \| good	7.203 \| good	24.89 \| good	0.273 \| good	1.715 \| good	0.1 \| good
2025-12-11T12:00:00.000Z	27 \| good	1.677 \| good	7.387 \| good	28.745 \| good	0.273 \| good	3.027 \| good	0.1 \| good
2025-12-11T13:00:00.000Z	25 \| good	1.677 \| good	7.387 \| good	27.221 \| good	0.272 \| good	2.966 \| good	0.1 \| good
2025-12-11T14:00:00.000Z	27 \| good	1.851 \| good	8.159 \| good	28.544 \| good	0.279 \| good	5.494 \| good	0.1 \| good
2025-12-11T15:00:00.000Z	26 \| good	1.938 \| good	8.516 \| good	27.673 \| good	0.193 \| good	7.271 \| good	0.105 \| good
2025-12-11T16:00:00.000Z	22 \| good	1.841 \| good	8.064 \| good	24.177 \| good	0.222 \| good	11.296 \| good	0.149 \| good
2025-12-11T17:00:00.000Z	20 \| good	1.834 \| good	8.112 \| good	22.16 \| good	0.216 \| good	8.076 \| good	0.149 \| good
2025-12-11T18:00:00.000Z	14 \| good	1.704 \| good	7.503 \| good	15.25 \| good	0.3 \| good	9.943 \| good	0.15 \| good
2025-12-11T19:00:00.000Z	11 \| good	1.608 \| good	7.002 \| good	12.078 \| good	0.273 \| good	7.551 \| good	0.15 \| good
2025-12-11T20:00:00.000Z	15 \| good	1.691 \| good	7.358 \| good	16.279 \| good	0.255 \| good	7.202 \| good	0.155 \| good
2025-12-11T21:00:00.000Z	11 \| good	1.895 \| good	8.024 \| good	12.302 \| good	0.213 \| good	7.355 \| good	0.15 \| good
2025-12-11T22:00:00.000Z	12 \| good	1.932 \| good	7.758 \| good	12.843 \| good	0.212 \| good	7.077 \| good	0.156 \| good
2025-12-11T23:00:00.000Z	16 \| good	2.274 \| good	9.491 \| good	17.112 \| good	0.23 \| good	6.43 \| good	0.158 \| good
2025-12-12T00:00:00.000Z	22 \| good	2.334 \| good	9.491 \| good	23.669 \| good	0.21 \| good	7.909 \| good	0.214 \| good
2025-12-12T01:00:00.000Z	17 \| good	2.414 \| good	10.153 \| good	18.487 \| good	0.226 \| good	8.402 \| good	0.214 \| good
2025-12-12T02:00:00.000Z	16 \| good	2.515 \| good	10.618 \| good	17.343 \| good	0.189 \| good	8.871 \| good	0.207 \| good
2025-12-12T03:00:00.000Z	16 \| good	2.71 \| good	11.473 \| good	17.48 \| good	0.723 \| good	11.498 \| good	0.186 \| good
2025-12-12T04:00:00.000Z	14 \| good	2.469 \| good	10.083 \| good	14.958 \| good	0.19 \| good	9.213 \| good	0.216 \| good
2025-12-12T05:00:00.000Z	16 \| good	2.629 \| good	10.743 \| good	13.365 \| good	0.243 \| good	8.386 \| good	0.165 \| good
2025-12-12T06:00:00.000Z	16 \| good	2.613 \| good	10.661 \| good	12.623 \| good	0.26 \| good	9.342 \| good	0.191 \| good
2025-12-12T07:00:00.000Z	16 \| good	2.793 \| good	11.587 \| good	13.248 \| good	0.26 \| good	7.935 \| good	0.199 \| good
2025-12-12T08:00:00.000Z	16 \| good	3.235 \| good	13.336 \| good	10.598 \| good	0.29 \| good	6.075 \| good	0.172 \| good
2025-12-12T09:00:00.000Z	22 \| good	3.57 \| good	14.851 \| good	12.159 \| good	0.192 \| good	8.147 \| good	0.158 \| good
2025-12-12T10:00:00.000Z	22 \| good	3.872 \| good	16.286 \| good	13.206 \| good	0.175 \| good	9.18 \| good	0.158 \| good
2025-12-12T11:00:00.000Z	22 \| good	4.239 \| good	18.972 \| good	9.274 \| good	0.193 \| good	6.302 \| good	0.151 \| good
2025-12-12T12:00:00.000Z	22 \| good	4.066 \| good	17.898 \| good	10.107 \| good	0.193 \| good	4.822 \| good	0.151 \| good
2025-12-12T13:00:00.000Z	22 \| good	4.055 \| good	17.884 \| good	10.683 \| good	0.192 \| good	4.913 \| good	0.151 \| good
2025-12-12T14:00:00.000Z	22 \| good	4.085 \| good	18.381 \| good	10.62 \| good	0.192 \| good	8.273 \| good	0.121 \| good
2025-12-12T15:00:00.000Z	22 \| good	4.369 \| good	19.48 \| good	13.911 \| good	0.289 \| good	8.075 \| good	0.158 \| good
2025-12-12T16:00:00.000Z	22 \| good	4.417 \| good	19.568 \| good	13.673 \| good	0.236 \| good	7.686 \| good	0.188 \| good
2025-12-12T17:00:00.000Z	27 \| good	4.91 \| good	21.938 \| good	8.577 \| good	0.19 \| good	8.688 \| good	0.214 \| good
2025-12-12T18:00:00.000Z	33 \| good	5.54 \| good	23.992 \| good	10.101 \| good	0.211 \| good	7.634 \| good	0.221 \| good
2025-12-12T19:00:00.000Z	33 \| good	6.307 \| good	27.536 \| good	14.651 \| good	0.482 \| good	8.858 \| good	0.228 \| good
2025-12-12T20:00:00.000Z	44 \| good	8.26 \| good	36.551 \| good	16.025 \| good	0.132 \| good	12.069 \| good	0.184 \| good
2025-12-12T21:00:00.000Z	38 \| good	7.378 \| good	32.989 \| good	17.272 \| good	0.262 \| good	8.681 \| good	0.193 \| good
2025-12-12T22:00:00.000Z	38 \| good	7.1 \| good	31.636 \| good	16.566 \| good	0.193 \| good	5.769 \| good	0.172 \| good
2025-12-12T23:00:00.000Z	27 \| good	4.573 \| good	20.278 \| good	11.921 \| good	0.217 \| good	7.378 \| good	0.172 \| good
2025-12-13T00:00:00.000Z	27 \| good	4.528 \| good	20.053 \| good	13.495 \| good	0.199 \| good	10.544 \| good	0.265 \| good
2025-12-13T01:00:00.000Z	22 \| good	4.002 \| good	17.809 \| good	9.786 \| good	0.207 \| good	11.395 \| good	0.265 \| good
2025-12-13T02:00:00.000Z	22 \| good	3.941 \| good	17.04 \| good	9.311 \| good	0.167 \| good	11.467 \| good	0.297 \| good
2025-12-13T03:00:00.000Z	22 \| good	3.941 \| good	17.04 \| good	9.311 \| good	0.167 \| good	11.467 \| good	0.297 \| good
2025-12-13T04:00:00.000Z	71 \| moderate	20.088 \| fine	88.891 \| fine	8.694 \| good	1.263 \| good	18.063 \| good	0.312 \| good
2025-12-13T05:00:00.000Z	73 \| moderate	20.554 \| fine	89.861 \| fine	9.202 \| good	1.248 \| good	17.733 \| good	0.319 \| good
2025-12-13T06:00:00.000Z	71 \| moderate	19.526 \| fine	86.559 \| fine	8.951 \| good	1.234 \| good	17.403 \| good	0.326 \| good
2025-12-13T07:00:00.000Z	69 \| moderate	19.103 \| fine	84.836 \| fine	9.076 \| good	1.096 \| good	16.258 \| good	0.307 \| good
2025-12-13T08:00:00.000Z	73 \| moderate	20.717 \| fine	90.731 \| fine	7.56 \| good	0.958 \| good	15.113 \| good	0.287 \| good
2025-12-13T09:00:00.000Z	73 \| moderate	21.313 \| fine	93.911 \| fine	6.09 \| good	0.821 \| good	13.968 \| good	0.268 \| good
2025-12-13T10:00:00.000Z	73 \| moderate	21.214 \| fine	93.825 \| fine	5.352 \| good	0.776 \| good	12.826 \| good	0.252 \| good
2025-12-13T11:00:00.000Z	73 \| moderate	20.915 \| fine	91.974 \| fine	4.78 \| good	0.732 \| good	11.684 \| good	0.236 \| good
2025-12-13T12:00:00.000Z	73 \| moderate	20.887 \| fine	91.79 \| fine	4.52 \| good	0.688 \| good	10.542 \| good	0.221 \| good
2025-12-13T13:00:00.000Z	77 \| moderate	22.501 \| fine	98.849 \| fine	4.697 \| good	0.739 \| good	10.328 \| good	0.216 \| good
2025-12-13T14:00:00.000Z	73 \| moderate	20.773 \| fine	91.346 \| fine	8.251 \| good	0.79 \| good	10.115 \| good	0.211 \| good
2025-12-13T15:00:00.000Z	73 \| moderate	20.982 \| fine	91.7 \| fine	11.096 \| good	0.84 \| good	9.902 \| good	0.206 \| good
2025-12-13T16:00:00.000Z	71 \| moderate	20.094 \| fine	87.882 \| fine	12.761 \| good	0.9 \| good	8.909 \| good	0.212 \| good
2025-12-13T17:00:00.000Z	75 \| moderate	22.191 \| fine	97.283 \| fine	14.099 \| good	0.96 \| good	7.917 \| good	0.219 \| good
2025-12-13T18:00:00.000Z	73 \| moderate	21.388 \| fine	93.362 \| fine	17.745 \| good	1.019 \| good	6.925 \| good	0.225 \| good
2025-12-13T19:00:00.000Z	71 \| moderate	19.801 \| fine	86.694 \| fine	21.053 \| good	1.204 \| good	6.738 \| good	0.21 \| good
2025-12-13T20:00:00.000Z	69 \| moderate	18.871 \| fine	83.675 \| fine	24.432 \| good	1.388 \| good	6.551 \| good	0.195 \| good
2025-12-13T21:00:00.000Z	71 \| moderate	19.981 \| fine	87.391 \| fine	24.307 \| good	1.572 \| good	6.364 \| good	0.18 \| good
2025-12-13T22:00:00.000Z	77 \| moderate	23.102 \| fine	100.924 \| fine	23.171 \| good	1.61 \| good	8.221 \| good	0.197 \| good
2025-12-13T23:00:00.000Z	82 \| moderate	25.979 \| fine	113.377 \| fine	19.096 \| good	1.649 \| good	10.079 \| good	0.213 \| good
2025-12-14T00:00:00.000Z	86 \| moderate	28.09 \| fine	122.6 \| fine	15.071 \| good	1.687 \| good	11.936 \| good	0.229 \| good
2025-12-14T01:00:00.000Z	94 \| moderate	31.618 \| fine	138.333 \| fine	9.856 \| good	1.729 \| good	13.808 \| good	0.265 \| good
2025-12-14T02:00:00.000Z	100 \| moderate	35.197 \| fine	153.852 \| fine	5.954 \| good	1.771 \| good	15.681 \| good	0.302 \| good
2025-12-14T03:00:00.000Z	110 \| sensitive	38.855 \| moderate	170.93 \| moderate	4.704 \| good	1.813 \| good	17.554 \| good	0.339 \| good
2025-12-14T04:00:00.000Z	112 \| sensitive	39.508 \| moderate	173.251 \| moderate	4.009 \| good	1.811 \| good	17.323 \| good	0.332 \| good
2025-12-14T05:00:00.000Z	119 \| sensitive	43.22 \| moderate	191.305 \| moderate	2.586 \| good	1.809 \| good	17.092 \| good	0.325 \| good
2025-12-14T06:00:00.000Z	127 \| sensitive	45.577 \| moderate	201.323 \| moderate	1.669 \| good	1.807 \| good	16.861 \| good	0.319 \| good
2025-12-14T07:00:00.000Z	124 \| sensitive	45.137 \| moderate	200.682 \| moderate	1.107 \| good	1.662 \| good	16.257 \| good	0.311 \| good
2025-12-14T08:00:00.000Z	115 \| sensitive	41.44 \| moderate	183.624 \| moderate	1.786 \| good	1.518 \| good	15.653 \| good	0.303 \| good
2025-12-14T09:00:00.000Z	105 \| sensitive	37.281 \| moderate	163.524 \| moderate	2.37 \| good	1.373 \| good	15.049 \| good	0.295 \| good
2025-12-14T10:00:00.000Z	97 \| moderate	33.525 \| fine	147.32 \| fine	2.629 \| good	1.254 \| good	14.755 \| good	0.282 \| good
2025-12-14T11:00:00.000Z	90 \| moderate	30.211 \| fine	132.255 \| fine	2.879 \| good	1.136 \| good	14.461 \| good	0.269 \| good
2025-12-14T12:00:00.000Z	86 \| moderate	27.69 \| fine	120.627 \| fine	3.793 \| good	1.017 \| good	14.167 \| good	0.256 \| good
2025-12-14T13:00:00.000Z	81 \| moderate	24.912 \| fine	109.098 \| fine	5.219 \| good	1.014 \| good	13.574 \| good	0.249 \| good
2025-12-14T14:00:00.000Z	77 \| moderate	23.404 \| fine	102.495 \| fine	7.689 \| good	1.01 \| good	12.982 \| good	0.242 \| good
2025-12-14T15:00:00.000Z	73 \| moderate	21.115 \| fine	92.745 \| fine	11.232 \| good	1.007 \| good	12.389 \| good	0.235 \| good
2025-12-14T16:00:00.000Z	69 \| moderate	19.054 \| fine	83.805 \| fine	10.917 \| good	1.046 \| good	11.941 \| good	0.24 \| good
2025-12-14T17:00:00.000Z	60 \| moderate	13.667 \| fine	61.385 \| fine	13.481 \| good	1.085 \| good	11.493 \| good	0.246 \| good
2025-12-14T18:00:00.000Z	54 \| moderate	10.784 \| good	48.057 \| good	15.457 \| good	1.125 \| good	11.046 \| good	0.251 \| good
2025-12-14T19:00:00.000Z	49 \| good	8.812 \| good	39.59 \| good	14.959 \| good	1.189 \| good	10.033 \| good	0.239 \| good
2025-12-14T20:00:00.000Z	44 \| good	8.464 \| good	37.276 \| good	14.888 \| good	1.253 \| good	9.02 \| good	0.227 \| good
2025-12-14T21:00:00.000Z	38 \| good	7.033 \| good	30.697 \| good	14.333 \| good	1.318 \| good	8.008 \| good	0.215 \| good
2025-12-14T22:00:00.000Z	27 \| good	5.418 \| good	23.904 \| good	17.66 \| good	1.344 \| good	8.915 \| good	0.221 \| good
2025-12-14T23:00:00.000Z	27 \| good	5.042 \| good	22.441 \| good	16.096 \| good	1.371 \| good	9.823 \| good	0.227 \| good
2025-12-15T00:00:00.000Z	58 \| moderate	13.38 \| fine	14.092 \| good	17.377 \| good	1.394 \| good	10.619 \| good	0.231 \| good
2025-12-15T01:00:00.000Z	33 \| good	5.555 \| good	23.719 \| good	11.755 \| good	1.436 \| good	11.582 \| good	0.24 \| good
2025-12-15T02:00:00.000Z	38 \| good	7.435 \| good	32.901 \| good	7.846 \| good	1.475 \| good	12.432 \| good	0.246 \| good
2025-12-15T03:00:00.000Z	49 \| good	9.141 \| good	40.122 \| good	5.046 \| good	1.513 \| good	13.283 \| good	0.253 \| good

St. Helens

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

0.28ppm

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 08:00:00 on 2025-12-12.

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 2025-12-12.

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 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 3.941 μg/m³.

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

The current PM₁₀ concentration at St. Helens, Oregon is 17.04 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 0.297 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 0.167 ppb.

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

The current ozone (O₃) concentration at St. Helens, Oregon is 9.311 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 11.467 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-11T04:00:00.000Z	19 \| good	1.623 \| good	6.727 \| good	20.588 \| good	0.212 \| good	3.361 \| good	0.144 \| good
2025-12-11T05:00:00.000Z	20 \| good	1.757 \| good	7.336 \| good	22.414 \| good	0.233 \| good	2.238 \| good	0.107 \| good
2025-12-11T06:00:00.000Z	22 \| good	1.792 \| good	7.578 \| good	24.228 \| good	0.293 \| good	2.879 \| good	0.107 \| good
2025-12-11T07:00:00.000Z	19 \| good	1.778 \| good	7.428 \| good	21.249 \| good	0.235 \| good	3.044 \| good	0.107 \| good
2025-12-11T08:00:00.000Z	21 \| good	1.769 \| good	7.428 \| good	22.663 \| good	0.235 \| good	3.434 \| good	0.107 \| good
2025-12-11T09:00:00.000Z	21 \| good	1.732 \| good	7.21 \| good	22.797 \| good	0.254 \| good	3.559 \| good	0.107 \| good
2025-12-11T10:00:00.000Z	18 \| good	1.702 \| good	7.053 \| good	19.176 \| good	0.254 \| good	2.701 \| good	0.107 \| good
2025-12-11T11:00:00.000Z	23 \| good	1.723 \| good	7.203 \| good	24.89 \| good	0.273 \| good	1.715 \| good	0.1 \| good
2025-12-11T12:00:00.000Z	27 \| good	1.677 \| good	7.387 \| good	28.745 \| good	0.273 \| good	3.027 \| good	0.1 \| good
2025-12-11T13:00:00.000Z	25 \| good	1.677 \| good	7.387 \| good	27.221 \| good	0.272 \| good	2.966 \| good	0.1 \| good
2025-12-11T14:00:00.000Z	27 \| good	1.851 \| good	8.159 \| good	28.544 \| good	0.279 \| good	5.494 \| good	0.1 \| good
2025-12-11T15:00:00.000Z	26 \| good	1.938 \| good	8.516 \| good	27.673 \| good	0.193 \| good	7.271 \| good	0.105 \| good
2025-12-11T16:00:00.000Z	22 \| good	1.841 \| good	8.064 \| good	24.177 \| good	0.222 \| good	11.296 \| good	0.149 \| good
2025-12-11T17:00:00.000Z	20 \| good	1.834 \| good	8.112 \| good	22.16 \| good	0.216 \| good	8.076 \| good	0.149 \| good
2025-12-11T18:00:00.000Z	14 \| good	1.704 \| good	7.503 \| good	15.25 \| good	0.3 \| good	9.943 \| good	0.15 \| good
2025-12-11T19:00:00.000Z	11 \| good	1.608 \| good	7.002 \| good	12.078 \| good	0.273 \| good	7.551 \| good	0.15 \| good
2025-12-11T20:00:00.000Z	15 \| good	1.691 \| good	7.358 \| good	16.279 \| good	0.255 \| good	7.202 \| good	0.155 \| good
2025-12-11T21:00:00.000Z	11 \| good	1.895 \| good	8.024 \| good	12.302 \| good	0.213 \| good	7.355 \| good	0.15 \| good
2025-12-11T22:00:00.000Z	12 \| good	1.932 \| good	7.758 \| good	12.843 \| good	0.212 \| good	7.077 \| good	0.156 \| good
2025-12-11T23:00:00.000Z	16 \| good	2.274 \| good	9.491 \| good	17.112 \| good	0.23 \| good	6.43 \| good	0.158 \| good
2025-12-12T00:00:00.000Z	22 \| good	2.334 \| good	9.491 \| good	23.669 \| good	0.21 \| good	7.909 \| good	0.214 \| good
2025-12-12T01:00:00.000Z	17 \| good	2.414 \| good	10.153 \| good	18.487 \| good	0.226 \| good	8.402 \| good	0.214 \| good
2025-12-12T02:00:00.000Z	16 \| good	2.515 \| good	10.618 \| good	17.343 \| good	0.189 \| good	8.871 \| good	0.207 \| good
2025-12-12T03:00:00.000Z	16 \| good	2.71 \| good	11.473 \| good	17.48 \| good	0.723 \| good	11.498 \| good	0.186 \| good
2025-12-12T04:00:00.000Z	14 \| good	2.469 \| good	10.083 \| good	14.958 \| good	0.19 \| good	9.213 \| good	0.216 \| good
2025-12-12T05:00:00.000Z	16 \| good	2.629 \| good	10.743 \| good	13.365 \| good	0.243 \| good	8.386 \| good	0.165 \| good
2025-12-12T06:00:00.000Z	16 \| good	2.613 \| good	10.661 \| good	12.623 \| good	0.26 \| good	9.342 \| good	0.191 \| good
2025-12-12T07:00:00.000Z	16 \| good	2.793 \| good	11.587 \| good	13.248 \| good	0.26 \| good	7.935 \| good	0.199 \| good
2025-12-12T08:00:00.000Z	16 \| good	3.235 \| good	13.336 \| good	10.598 \| good	0.29 \| good	6.075 \| good	0.172 \| good
2025-12-12T09:00:00.000Z	22 \| good	3.57 \| good	14.851 \| good	12.159 \| good	0.192 \| good	8.147 \| good	0.158 \| good
2025-12-12T10:00:00.000Z	22 \| good	3.872 \| good	16.286 \| good	13.206 \| good	0.175 \| good	9.18 \| good	0.158 \| good
2025-12-12T11:00:00.000Z	22 \| good	4.239 \| good	18.972 \| good	9.274 \| good	0.193 \| good	6.302 \| good	0.151 \| good
2025-12-12T12:00:00.000Z	22 \| good	4.066 \| good	17.898 \| good	10.107 \| good	0.193 \| good	4.822 \| good	0.151 \| good
2025-12-12T13:00:00.000Z	22 \| good	4.055 \| good	17.884 \| good	10.683 \| good	0.192 \| good	4.913 \| good	0.151 \| good
2025-12-12T14:00:00.000Z	22 \| good	4.085 \| good	18.381 \| good	10.62 \| good	0.192 \| good	8.273 \| good	0.121 \| good
2025-12-12T15:00:00.000Z	22 \| good	4.369 \| good	19.48 \| good	13.911 \| good	0.289 \| good	8.075 \| good	0.158 \| good
2025-12-12T16:00:00.000Z	22 \| good	4.417 \| good	19.568 \| good	13.673 \| good	0.236 \| good	7.686 \| good	0.188 \| good
2025-12-12T17:00:00.000Z	27 \| good	4.91 \| good	21.938 \| good	8.577 \| good	0.19 \| good	8.688 \| good	0.214 \| good
2025-12-12T18:00:00.000Z	33 \| good	5.54 \| good	23.992 \| good	10.101 \| good	0.211 \| good	7.634 \| good	0.221 \| good
2025-12-12T19:00:00.000Z	33 \| good	6.307 \| good	27.536 \| good	14.651 \| good	0.482 \| good	8.858 \| good	0.228 \| good
2025-12-12T20:00:00.000Z	44 \| good	8.26 \| good	36.551 \| good	16.025 \| good	0.132 \| good	12.069 \| good	0.184 \| good
2025-12-12T21:00:00.000Z	38 \| good	7.378 \| good	32.989 \| good	17.272 \| good	0.262 \| good	8.681 \| good	0.193 \| good
2025-12-12T22:00:00.000Z	38 \| good	7.1 \| good	31.636 \| good	16.566 \| good	0.193 \| good	5.769 \| good	0.172 \| good
2025-12-12T23:00:00.000Z	27 \| good	4.573 \| good	20.278 \| good	11.921 \| good	0.217 \| good	7.378 \| good	0.172 \| good
2025-12-13T00:00:00.000Z	27 \| good	4.528 \| good	20.053 \| good	13.495 \| good	0.199 \| good	10.544 \| good	0.265 \| good
2025-12-13T01:00:00.000Z	22 \| good	4.002 \| good	17.809 \| good	9.786 \| good	0.207 \| good	11.395 \| good	0.265 \| good
2025-12-13T02:00:00.000Z	22 \| good	3.941 \| good	17.04 \| good	9.311 \| good	0.167 \| good	11.467 \| good	0.297 \| good
2025-12-13T03:00:00.000Z	22 \| good	3.941 \| good	17.04 \| good	9.311 \| good	0.167 \| good	11.467 \| good	0.297 \| good
2025-12-13T04:00:00.000Z	71 \| moderate	20.088 \| fine	88.891 \| fine	8.694 \| good	1.263 \| good	18.063 \| good	0.312 \| good
2025-12-13T05:00:00.000Z	73 \| moderate	20.554 \| fine	89.861 \| fine	9.202 \| good	1.248 \| good	17.733 \| good	0.319 \| good
2025-12-13T06:00:00.000Z	71 \| moderate	19.526 \| fine	86.559 \| fine	8.951 \| good	1.234 \| good	17.403 \| good	0.326 \| good
2025-12-13T07:00:00.000Z	69 \| moderate	19.103 \| fine	84.836 \| fine	9.076 \| good	1.096 \| good	16.258 \| good	0.307 \| good
2025-12-13T08:00:00.000Z	73 \| moderate	20.717 \| fine	90.731 \| fine	7.56 \| good	0.958 \| good	15.113 \| good	0.287 \| good
2025-12-13T09:00:00.000Z	73 \| moderate	21.313 \| fine	93.911 \| fine	6.09 \| good	0.821 \| good	13.968 \| good	0.268 \| good
2025-12-13T10:00:00.000Z	73 \| moderate	21.214 \| fine	93.825 \| fine	5.352 \| good	0.776 \| good	12.826 \| good	0.252 \| good
2025-12-13T11:00:00.000Z	73 \| moderate	20.915 \| fine	91.974 \| fine	4.78 \| good	0.732 \| good	11.684 \| good	0.236 \| good
2025-12-13T12:00:00.000Z	73 \| moderate	20.887 \| fine	91.79 \| fine	4.52 \| good	0.688 \| good	10.542 \| good	0.221 \| good
2025-12-13T13:00:00.000Z	77 \| moderate	22.501 \| fine	98.849 \| fine	4.697 \| good	0.739 \| good	10.328 \| good	0.216 \| good
2025-12-13T14:00:00.000Z	73 \| moderate	20.773 \| fine	91.346 \| fine	8.251 \| good	0.79 \| good	10.115 \| good	0.211 \| good
2025-12-13T15:00:00.000Z	73 \| moderate	20.982 \| fine	91.7 \| fine	11.096 \| good	0.84 \| good	9.902 \| good	0.206 \| good
2025-12-13T16:00:00.000Z	71 \| moderate	20.094 \| fine	87.882 \| fine	12.761 \| good	0.9 \| good	8.909 \| good	0.212 \| good
2025-12-13T17:00:00.000Z	75 \| moderate	22.191 \| fine	97.283 \| fine	14.099 \| good	0.96 \| good	7.917 \| good	0.219 \| good
2025-12-13T18:00:00.000Z	73 \| moderate	21.388 \| fine	93.362 \| fine	17.745 \| good	1.019 \| good	6.925 \| good	0.225 \| good
2025-12-13T19:00:00.000Z	71 \| moderate	19.801 \| fine	86.694 \| fine	21.053 \| good	1.204 \| good	6.738 \| good	0.21 \| good
2025-12-13T20:00:00.000Z	69 \| moderate	18.871 \| fine	83.675 \| fine	24.432 \| good	1.388 \| good	6.551 \| good	0.195 \| good
2025-12-13T21:00:00.000Z	71 \| moderate	19.981 \| fine	87.391 \| fine	24.307 \| good	1.572 \| good	6.364 \| good	0.18 \| good
2025-12-13T22:00:00.000Z	77 \| moderate	23.102 \| fine	100.924 \| fine	23.171 \| good	1.61 \| good	8.221 \| good	0.197 \| good
2025-12-13T23:00:00.000Z	82 \| moderate	25.979 \| fine	113.377 \| fine	19.096 \| good	1.649 \| good	10.079 \| good	0.213 \| good
2025-12-14T00:00:00.000Z	86 \| moderate	28.09 \| fine	122.6 \| fine	15.071 \| good	1.687 \| good	11.936 \| good	0.229 \| good
2025-12-14T01:00:00.000Z	94 \| moderate	31.618 \| fine	138.333 \| fine	9.856 \| good	1.729 \| good	13.808 \| good	0.265 \| good
2025-12-14T02:00:00.000Z	100 \| moderate	35.197 \| fine	153.852 \| fine	5.954 \| good	1.771 \| good	15.681 \| good	0.302 \| good
2025-12-14T03:00:00.000Z	110 \| sensitive	38.855 \| moderate	170.93 \| moderate	4.704 \| good	1.813 \| good	17.554 \| good	0.339 \| good
2025-12-14T04:00:00.000Z	112 \| sensitive	39.508 \| moderate	173.251 \| moderate	4.009 \| good	1.811 \| good	17.323 \| good	0.332 \| good
2025-12-14T05:00:00.000Z	119 \| sensitive	43.22 \| moderate	191.305 \| moderate	2.586 \| good	1.809 \| good	17.092 \| good	0.325 \| good
2025-12-14T06:00:00.000Z	127 \| sensitive	45.577 \| moderate	201.323 \| moderate	1.669 \| good	1.807 \| good	16.861 \| good	0.319 \| good
2025-12-14T07:00:00.000Z	124 \| sensitive	45.137 \| moderate	200.682 \| moderate	1.107 \| good	1.662 \| good	16.257 \| good	0.311 \| good
2025-12-14T08:00:00.000Z	115 \| sensitive	41.44 \| moderate	183.624 \| moderate	1.786 \| good	1.518 \| good	15.653 \| good	0.303 \| good
2025-12-14T09:00:00.000Z	105 \| sensitive	37.281 \| moderate	163.524 \| moderate	2.37 \| good	1.373 \| good	15.049 \| good	0.295 \| good
2025-12-14T10:00:00.000Z	97 \| moderate	33.525 \| fine	147.32 \| fine	2.629 \| good	1.254 \| good	14.755 \| good	0.282 \| good
2025-12-14T11:00:00.000Z	90 \| moderate	30.211 \| fine	132.255 \| fine	2.879 \| good	1.136 \| good	14.461 \| good	0.269 \| good
2025-12-14T12:00:00.000Z	86 \| moderate	27.69 \| fine	120.627 \| fine	3.793 \| good	1.017 \| good	14.167 \| good	0.256 \| good
2025-12-14T13:00:00.000Z	81 \| moderate	24.912 \| fine	109.098 \| fine	5.219 \| good	1.014 \| good	13.574 \| good	0.249 \| good
2025-12-14T14:00:00.000Z	77 \| moderate	23.404 \| fine	102.495 \| fine	7.689 \| good	1.01 \| good	12.982 \| good	0.242 \| good
2025-12-14T15:00:00.000Z	73 \| moderate	21.115 \| fine	92.745 \| fine	11.232 \| good	1.007 \| good	12.389 \| good	0.235 \| good
2025-12-14T16:00:00.000Z	69 \| moderate	19.054 \| fine	83.805 \| fine	10.917 \| good	1.046 \| good	11.941 \| good	0.24 \| good
2025-12-14T17:00:00.000Z	60 \| moderate	13.667 \| fine	61.385 \| fine	13.481 \| good	1.085 \| good	11.493 \| good	0.246 \| good
2025-12-14T18:00:00.000Z	54 \| moderate	10.784 \| good	48.057 \| good	15.457 \| good	1.125 \| good	11.046 \| good	0.251 \| good
2025-12-14T19:00:00.000Z	49 \| good	8.812 \| good	39.59 \| good	14.959 \| good	1.189 \| good	10.033 \| good	0.239 \| good
2025-12-14T20:00:00.000Z	44 \| good	8.464 \| good	37.276 \| good	14.888 \| good	1.253 \| good	9.02 \| good	0.227 \| good
2025-12-14T21:00:00.000Z	38 \| good	7.033 \| good	30.697 \| good	14.333 \| good	1.318 \| good	8.008 \| good	0.215 \| good
2025-12-14T22:00:00.000Z	27 \| good	5.418 \| good	23.904 \| good	17.66 \| good	1.344 \| good	8.915 \| good	0.221 \| good
2025-12-14T23:00:00.000Z	27 \| good	5.042 \| good	22.441 \| good	16.096 \| good	1.371 \| good	9.823 \| good	0.227 \| good
2025-12-15T00:00:00.000Z	58 \| moderate	13.38 \| fine	14.092 \| good	17.377 \| good	1.394 \| good	10.619 \| good	0.231 \| good
2025-12-15T01:00:00.000Z	33 \| good	5.555 \| good	23.719 \| good	11.755 \| good	1.436 \| good	11.582 \| good	0.24 \| good
2025-12-15T02:00:00.000Z	38 \| good	7.435 \| good	32.901 \| good	7.846 \| good	1.475 \| good	12.432 \| good	0.246 \| good
2025-12-15T03:00:00.000Z	49 \| good	9.141 \| good	40.122 \| good	5.046 \| good	1.513 \| good	13.283 \| good	0.253 \| 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 air quality in St. Helens, Oregon?

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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?