What are the current PM10 levels at Mercer Island, Washington?

The current PM10 levels in Mercer Island, Washington are 28.477 μg/m3.

What are the current sulfur dioxide (SO2) levels at Mercer Island, Washington?

The current sulfur dioxide (SO2) levels in Mercer Island, Washington are 0.311 ppb.

What are the current ozone (O3) levels at Mercer Island, Washington?

The current ozone (O3) levels at Mercer Island, Washington is 10.69 ppm.

What are the current nitrogen dioxide (NO2) levels at Mercer Island, Washington?

The current nitrogen dioxide (NO2) levels at Mercer Island, Washington is 15.766 ppb.

Real-time air quality index in Mercer Island, Washington today

Q: What are the current PM2.5 levels in Mercer Island, Washington?

The measured PM2.5 levels in Mercer Island, Washington at present are 8.21 μg/m3.

Stay updated with real-time air quality in Mercer Island, Washington 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

Mercer Island, Washington

Last updated: ... (Local time)

Common air pollutants in Mercer Island, Washington

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

2.51 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

9.38 μg/m³

155

255

425

605+

Ozone (O₃)

25.09 ppb

201

201+

Sulfur Dioxide (SO₂)

0.32 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

6.90 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.10 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Mercer Island, Washington

Get Live Pollen Counts

Mercer Island, Washington

Scroll To Air Quality Map

Track live Mercer Island, Washington air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-23T06:00:00.000Z	38 \| good	7.056 \| good	26.589 \| good	15.468 \| good	0.216 \| good	14.121 \| good	0.212 \| good
2025-10-23T07:00:00.000Z	44 \| good	8.204 \| good	27.732 \| good	15.633 \| good	0.131 \| good	11.96 \| good	0.212 \| good
2025-10-23T08:00:00.000Z	49 \| good	8.657 \| good	31.483 \| good	11.275 \| good	0.213 \| good	12.744 \| good	0.203 \| good
2025-10-23T09:00:00.000Z	49 \| good	9.214 \| good	33.391 \| good	12.697 \| good	0.213 \| good	12.074 \| good	0.199 \| good
2025-10-23T10:00:00.000Z	49 \| good	8.824 \| good	31.183 \| good	12.231 \| good	0.213 \| good	10.103 \| good	0.199 \| good
2025-10-23T11:00:00.000Z	49 \| good	8.883 \| good	31.738 \| good	15.076 \| good	0.21 \| good	11.093 \| good	0.199 \| good
2025-10-23T12:00:00.000Z	49 \| good	8.529 \| good	31.77 \| good	16.515 \| good	0.22 \| good	11.872 \| good	0.198 \| good
2025-10-23T13:00:00.000Z	52 \| moderate	9.578 \| good	33.461 \| good	14.296 \| good	0.323 \| good	12.486 \| good	0.198 \| good
2025-10-23T14:00:00.000Z	52 \| moderate	9.976 \| good	33.997 \| good	9.752 \| good	0.223 \| good	18.688 \| good	0.283 \| good
2025-10-23T15:00:00.000Z	52 \| moderate	10.057 \| good	34.113 \| good	9.042 \| good	0.304 \| good	18.705 \| good	0.286 \| good
2025-10-23T16:00:00.000Z	52 \| moderate	10.393 \| good	38.408 \| good	8.198 \| good	0.237 \| good	18.764 \| good	0.309 \| good
2025-10-23T17:00:00.000Z	54 \| moderate	10.616 \| good	40.199 \| good	8.376 \| good	0.565 \| good	20.878 \| good	0.297 \| good
2025-10-23T18:00:00.000Z	52 \| moderate	10.109 \| good	40.332 \| good	8.493 \| good	0.557 \| good	20.326 \| good	0.29 \| good
2025-10-23T19:00:00.000Z	49 \| good	9.442 \| good	36.779 \| good	9.628 \| good	0.472 \| good	17.873 \| good	0.203 \| good
2025-10-23T20:00:00.000Z	44 \| good	7.532 \| good	29.15 \| good	14.326 \| good	0.566 \| good	15.534 \| good	0.196 \| good
2025-10-23T21:00:00.000Z	38 \| good	6.596 \| good	23.552 \| good	15.615 \| good	0.23 \| good	10.028 \| good	0.11 \| good
2025-10-23T22:00:00.000Z	27 \| good	5.315 \| good	20.114 \| good	20.538 \| good	0.393 \| good	10.638 \| good	0.106 \| good
2025-10-23T23:00:00.000Z	27 \| good	4.838 \| good	18.513 \| good	20.526 \| good	0.393 \| good	10.169 \| good	0.106 \| good
2025-10-24T00:00:00.000Z	27 \| good	5.144 \| good	17.863 \| good	21.055 \| good	0.311 \| good	9.5 \| good	0.196 \| good
2025-10-24T01:00:00.000Z	27 \| good	5.244 \| good	18.386 \| good	17.748 \| good	0.308 \| good	10.988 \| good	0.202 \| good
2025-10-24T02:00:00.000Z	27 \| good	5.302 \| good	19.029 \| good	17.992 \| good	0.305 \| good	11.5 \| good	0.199 \| good
2025-10-24T03:00:00.000Z	58 \| moderate	13.414 \| fine	59.707 \| fine	4.953 \| good	0.943 \| good	19.577 \| good	0.278 \| good
2025-10-24T04:00:00.000Z	38 \| good	6.76 \| good	26.027 \| good	15.015 \| good	0.301 \| good	19.114 \| good	0.2 \| good
2025-10-24T05:00:00.000Z	44 \| good	8.095 \| good	31.444 \| good	13.192 \| good	0.473 \| good	16.486 \| good	0.286 \| good
2025-10-24T06:00:00.000Z	49 \| good	8.955 \| good	35.558 \| good	11.758 \| good	0.474 \| good	19.88 \| good	0.286 \| good
2025-10-24T07:00:00.000Z	52 \| moderate	9.94 \| good	36.013 \| good	11.589 \| good	0.475 \| good	19.63 \| good	0.286 \| good
2025-10-24T08:00:00.000Z	52 \| moderate	10.367 \| good	36.908 \| good	10.844 \| good	0.389 \| good	19.017 \| good	0.283 \| good
2025-10-24T09:00:00.000Z	52 \| moderate	9.873 \| good	36.766 \| good	12.485 \| good	0.308 \| good	13.53 \| good	0.196 \| good
2025-10-24T10:00:00.000Z	52 \| moderate	10.127 \| good	39.506 \| good	13.729 \| good	0.307 \| good	13.114 \| good	0.196 \| good
2025-10-24T11:00:00.000Z	52 \| moderate	9.901 \| good	36.274 \| good	12.602 \| good	0.389 \| good	12.059 \| good	0.196 \| good
2025-10-24T12:00:00.000Z	49 \| good	8.892 \| good	35.381 \| good	11.508 \| good	0.397 \| good	14.54 \| good	0.193 \| good
2025-10-24T13:00:00.000Z	49 \| good	9.2 \| good	33.953 \| good	10.214 \| good	0.311 \| good	13.382 \| good	0.193 \| good
2025-10-24T14:00:00.000Z	49 \| good	8.629 \| good	32.589 \| good	12.615 \| good	0.225 \| good	7.234 \| good	0.196 \| good
2025-10-24T15:00:00.000Z	44 \| good	8.21 \| good	28.477 \| good	10.69 \| good	0.311 \| good	15.766 \| good	0.196 \| good
2025-10-24T16:00:00.000Z	38 \| good	6.926 \| good	26.387 \| good	14.947 \| good	0.307 \| good	15.563 \| good	0.192 \| good
2025-10-24T17:00:00.000Z	33 \| good	6.356 \| good	23.631 \| good	16.733 \| good	0.307 \| good	22.279 \| good	0.192 \| good
2025-10-24T18:00:00.000Z	33 \| good	6.122 \| good	23.223 \| good	16.105 \| good	0.393 \| good	19.005 \| good	0.192 \| good
2025-10-24T19:00:00.000Z	27 \| good	5.374 \| good	20.438 \| good	18.031 \| good	0.393 \| good	13.515 \| good	0.192 \| good
2025-10-24T20:00:00.000Z	27 \| good	4.596 \| good	14.547 \| good	17.545 \| good	0.397 \| good	13.295 \| good	0.189 \| good
2025-10-24T21:00:00.000Z	18 \| good	2.507 \| good	10.69 \| good	19.199 \| good	0.325 \| good	12.975 \| good	0.189 \| good
2025-10-24T22:00:00.000Z	19 \| good	2.073 \| good	8.567 \| good	20.602 \| good	0.348 \| good	12.835 \| good	0.105 \| good
2025-10-24T23:00:00.000Z	25 \| good	2.71 \| good	12.361 \| good	27.106 \| good	0.348 \| good	11.066 \| good	0.193 \| good
2025-10-25T00:00:00.000Z	24 \| good	2.232 \| good	11.37 \| good	26.004 \| good	0.348 \| good	13.595 \| good	0.196 \| good
2025-10-25T01:00:00.000Z	25 \| good	1.326 \| good	9.788 \| good	26.756 \| good	0.345 \| good	13.469 \| good	0.198 \| good
2025-10-25T02:00:00.000Z	26 \| good	1.521 \| good	9.673 \| good	27.785 \| good	0.345 \| good	13.238 \| good	0.108 \| good
2025-10-25T03:00:00.000Z	26 \| good	2.395 \| good	10.331 \| good	28.057 \| good	0.587 \| good	7.907 \| good	0.149 \| good
2025-10-25T04:00:00.000Z	25 \| good	2.912 \| good	11.125 \| good	26.582 \| good	0.324 \| good	9.869 \| good	0.1 \| good
2025-10-25T05:00:00.000Z	23 \| good	2.508 \| good	9.375 \| good	25.089 \| good	0.324 \| good	6.899 \| good	0.103 \| good
2025-10-25T05:00:00.000Z	23 \| good	2.508 \| good	9.375 \| good	25.089 \| good	0.324 \| good	6.899 \| good	0.103 \| good
2025-10-24T17:00:00.000Z	22 \| good	2.476 \| good	10.512 \| good	23.824 \| good	0.332 \| good	3.54 \| good	0.13 \| good
2025-10-24T18:00:00.000Z	19 \| good	3.039 \| good	13.118 \| good	21.057 \| good	0.319 \| good	3.693 \| good	0.129 \| good
2025-10-24T19:00:00.000Z	22 \| good	4.076 \| good	17.823 \| good	19.242 \| good	0.356 \| good	4.504 \| good	0.134 \| good
2025-10-24T20:00:00.000Z	26 \| good	3.446 \| good	15.009 \| good	27.7 \| good	0.363 \| good	4.33 \| good	0.132 \| good
2025-10-24T21:00:00.000Z	23 \| good	3.837 \| good	17.032 \| good	25.301 \| good	0.351 \| good	4.221 \| good	0.126 \| good
2025-10-24T22:00:00.000Z	24 \| good	3.716 \| good	16.043 \| good	26.418 \| good	0.382 \| good	5.026 \| good	0.129 \| good
2025-10-24T23:00:00.000Z	28 \| good	2.452 \| good	10.402 \| good	29.615 \| good	0.413 \| good	5.83 \| good	0.132 \| good
2025-10-25T00:00:00.000Z	27 \| good	2.583 \| good	10.892 \| good	28.71 \| good	0.443 \| good	6.635 \| good	0.135 \| good
2025-10-25T01:00:00.000Z	28 \| good	2.4 \| good	10.218 \| good	29.766 \| good	0.665 \| good	11.785 \| good	0.188 \| good
2025-10-25T02:00:00.000Z	24 \| good	3.37 \| good	14.325 \| good	25.538 \| good	0.68 \| good	11.365 \| good	0.186 \| good
2025-10-25T03:00:00.000Z	22 \| good	3.597 \| good	15.305 \| good	22.569 \| good	0.694 \| good	10.945 \| good	0.185 \| good
2025-10-25T04:00:00.000Z	26 \| good	2.591 \| good	10.703 \| good	27.992 \| good	0.515 \| good	6.407 \| good	0.14 \| good
2025-10-25T05:00:00.000Z	26 \| good	2.934 \| good	11.951 \| good	27.759 \| good	0.503 \| good	5.039 \| good	0.133 \| good
2025-10-25T06:00:00.000Z	26 \| good	2.937 \| good	12.525 \| good	27.673 \| good	0.491 \| good	3.671 \| good	0.127 \| good
2025-10-25T07:00:00.000Z	22 \| good	3.325 \| good	14.545 \| good	24.391 \| good	0.511 \| good	3.152 \| good	0.121 \| good
2025-10-25T08:00:00.000Z	22 \| good	3.251 \| good	13.791 \| good	23.809 \| good	0.532 \| good	2.634 \| good	0.116 \| good
2025-10-25T09:00:00.000Z	22 \| good	2.802 \| good	11.889 \| good	24.281 \| good	0.334 \| good	2.371 \| good	0.117 \| good
2025-10-25T10:00:00.000Z	21 \| good	2.714 \| good	11.592 \| good	22.944 \| good	0.346 \| good	2.357 \| good	0.115 \| good
2025-10-25T11:00:00.000Z	21 \| good	2.745 \| good	11.58 \| good	22.763 \| good	0.359 \| good	2.343 \| good	0.114 \| good
2025-10-25T12:00:00.000Z	22 \| good	4.115 \| good	17.867 \| good	23.407 \| good	0.624 \| good	2.483 \| good	0.11 \| good
2025-10-25T13:00:00.000Z	22 \| good	4.455 \| good	19.413 \| good	24.009 \| good	0.625 \| good	3.701 \| good	0.118 \| good
2025-10-25T14:00:00.000Z	27 \| good	4.55 \| good	19.674 \| good	21.679 \| good	0.626 \| good	4.919 \| good	0.126 \| good
2025-10-25T15:00:00.000Z	27 \| good	5.142 \| good	22.56 \| good	18.139 \| good	0.627 \| good	6.137 \| good	0.134 \| good
2025-10-25T16:00:00.000Z	27 \| good	4.621 \| good	19.864 \| good	23.284 \| good	0.582 \| good	6.007 \| good	0.138 \| good
2025-10-25T17:00:00.000Z	24 \| good	2.919 \| good	12.088 \| good	26.411 \| good	0.389 \| good	5.331 \| good	0.143 \| good
2025-10-25T18:00:00.000Z	22 \| good	3.772 \| good	16.371 \| good	21.365 \| good	0.358 \| good	4.949 \| good	0.145 \| good
2025-10-25T19:00:00.000Z	22 \| good	4.036 \| good	17.357 \| good	20.713 \| good	0.336 \| good	4.161 \| good	0.139 \| good
2025-10-25T20:00:00.000Z	27 \| good	5.324 \| good	23.476 \| good	22.784 \| good	0.402 \| good	3.837 \| good	0.134 \| good
2025-10-25T21:00:00.000Z	27 \| good	4.791 \| good	21.1 \| good	26.043 \| good	0.356 \| good	2.884 \| good	0.129 \| good
2025-10-25T22:00:00.000Z	30 \| good	3.909 \| good	16.921 \| good	31.885 \| good	0.324 \| good	2.854 \| good	0.127 \| good
2025-10-25T23:00:00.000Z	31 \| good	3.248 \| good	13.578 \| good	33.628 \| good	0.291 \| good	2.824 \| good	0.126 \| good
2025-10-26T00:00:00.000Z	27 \| good	4.387 \| good	19.409 \| good	28.504 \| good	0.258 \| good	2.795 \| good	0.124 \| good
2025-10-26T01:00:00.000Z	27 \| good	5.023 \| good	22.186 \| good	25.091 \| good	0.28 \| good	3.063 \| good	0.128 \| good
2025-10-26T02:00:00.000Z	27 \| good	5.439 \| good	23.944 \| good	24.946 \| good	0.296 \| good	3.264 \| good	0.131 \| good
2025-10-26T03:00:00.000Z	25 \| good	3.838 \| good	16.737 \| good	26.908 \| good	0.312 \| good	3.465 \| good	0.135 \| good
2025-10-26T04:00:00.000Z	30 \| good	2.184 \| good	8.811 \| good	32.153 \| good	0.343 \| good	2.321 \| good	0.112 \| good
2025-10-26T05:00:00.000Z	31 \| good	2.219 \| good	8.776 \| good	34.486 \| good	0.424 \| good	2.019 \| good	0.108 \| good
2025-10-26T06:00:00.000Z	31 \| good	1.976 \| good	8.27 \| good	33.739 \| good	0.504 \| good	1.717 \| good	0.104 \| good
2025-10-26T07:00:00.000Z	31 \| good	1.779 \| good	7.269 \| good	33.388 \| good	0.503 \| good	1.579 \| good	0.103 \| good
2025-10-26T08:00:00.000Z	31 \| good	1.194 \| good	4.778 \| good	33.824 \| good	0.501 \| good	1.44 \| good	0.101 \| good
2025-10-26T09:00:00.000Z	33 \| good	1.009 \| good	4.048 \| good	35.706 \| good	0.357 \| good	1.095 \| good	0.106 \| good
2025-10-26T10:00:00.000Z	33 \| good	1.028 \| good	3.944 \| good	35.767 \| good	0.385 \| good	1.167 \| good	0.105 \| good
2025-10-26T11:00:00.000Z	32 \| good	1.331 \| good	5.555 \| good	35.294 \| good	0.414 \| good	1.239 \| good	0.105 \| good
2025-10-26T12:00:00.000Z	31 \| good	1.963 \| good	8.088 \| good	33.159 \| good	0.49 \| good	1.642 \| good	0.101 \| good
2025-10-26T13:00:00.000Z	28 \| good	2.459 \| good	10.003 \| good	29.993 \| good	0.508 \| good	2.29 \| good	0.105 \| good
2025-10-26T14:00:00.000Z	31 \| good	2.434 \| good	9.88 \| good	32.646 \| good	0.526 \| good	2.937 \| good	0.11 \| good
2025-10-26T15:00:00.000Z	29 \| good	2.774 \| good	11.404 \| good	30.825 \| good	0.543 \| good	3.584 \| good	0.115 \| good
2025-10-26T16:00:00.000Z	28 \| good	1.852 \| good	7.612 \| good	29.65 \| good	0.52 \| good	3.312 \| good	0.115 \| good

Mercer Island

Empower business decisions with accurate air quality data

Mercer Island, Washington air quality map: Real-time AQI near you

0.20ppm

How accurate is Washington, USA air quality data?

Air quality measurements for Washington, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.

Source: Ambee Data Sources

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Frequently asked questions

How frequently is the air quality data for Mercer Island, Washington updated?

Air quality data for Mercer Island, Washington is updated on an hourly basis.

When did Mercer Island, Washington experience the worst air quality in the last 24 hours?

The worst air quality in Mercer Island, Washington was recorded at 03:00:00 on 2025-10-24.

When did Mercer Island, Washington have its best air quality in the last 24 hours?

The best air quality in Mercer Island, Washington was recorded at 02:00:00 on 2025-10-24.

What is the real-time air quality index for Mercer Island, Washington?

The real-time air quality index in Mercer Island, Washington is 44, currently categorized as Good.

Which pollutant is found most often in Mercer Island, Washington?

The most common pollutant in Mercer Island, Washington is PM2.5.

What can I do if the air quality in Mercer Island, Washington is poor?

If the air quality in Mercer Island, Washington is poor, limit outdoor activities and use a mask to safeguard your health.

What are the current PM_2.5 levels in Mercer Island, Washington?

The measured PM_2.5 levels in Mercer Island, Washington at present are 8.21 μg/m³.

What are the current PM₁₀ levels at Mercer Island, Washington?

The current PM₁₀ levels in Mercer Island, Washington are 28.477 μg/m³.

What are the current carbon monoxide (CO) levels at Mercer Island, Washington?

The current carbon monoxide (CO) level in Mercer Island, Washington is 0.196 ppm.

What are the current sulfur dioxide (SO₂) levels at Mercer Island, Washington?

The current sulfur dioxide (SO₂) levels in Mercer Island, Washington are 0.311 ppb.

What are the current ozone (O₃) levels at Mercer Island, Washington?

The current ozone (O₃) levels at Mercer Island, Washington is 10.69 ppm.

What are the current nitrogen dioxide (NO₂) levels at Mercer Island, Washington?

The current nitrogen dioxide (NO₂) levels at Mercer Island, Washington is 15.766 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-10-23T06:00:00.000Z	38 \| good	7.056 \| good	26.589 \| good	15.468 \| good	0.216 \| good	14.121 \| good	0.212 \| good
2025-10-23T07:00:00.000Z	44 \| good	8.204 \| good	27.732 \| good	15.633 \| good	0.131 \| good	11.96 \| good	0.212 \| good
2025-10-23T08:00:00.000Z	49 \| good	8.657 \| good	31.483 \| good	11.275 \| good	0.213 \| good	12.744 \| good	0.203 \| good
2025-10-23T09:00:00.000Z	49 \| good	9.214 \| good	33.391 \| good	12.697 \| good	0.213 \| good	12.074 \| good	0.199 \| good
2025-10-23T10:00:00.000Z	49 \| good	8.824 \| good	31.183 \| good	12.231 \| good	0.213 \| good	10.103 \| good	0.199 \| good
2025-10-23T11:00:00.000Z	49 \| good	8.883 \| good	31.738 \| good	15.076 \| good	0.21 \| good	11.093 \| good	0.199 \| good
2025-10-23T12:00:00.000Z	49 \| good	8.529 \| good	31.77 \| good	16.515 \| good	0.22 \| good	11.872 \| good	0.198 \| good
2025-10-23T13:00:00.000Z	52 \| moderate	9.578 \| good	33.461 \| good	14.296 \| good	0.323 \| good	12.486 \| good	0.198 \| good
2025-10-23T14:00:00.000Z	52 \| moderate	9.976 \| good	33.997 \| good	9.752 \| good	0.223 \| good	18.688 \| good	0.283 \| good
2025-10-23T15:00:00.000Z	52 \| moderate	10.057 \| good	34.113 \| good	9.042 \| good	0.304 \| good	18.705 \| good	0.286 \| good
2025-10-23T16:00:00.000Z	52 \| moderate	10.393 \| good	38.408 \| good	8.198 \| good	0.237 \| good	18.764 \| good	0.309 \| good
2025-10-23T17:00:00.000Z	54 \| moderate	10.616 \| good	40.199 \| good	8.376 \| good	0.565 \| good	20.878 \| good	0.297 \| good
2025-10-23T18:00:00.000Z	52 \| moderate	10.109 \| good	40.332 \| good	8.493 \| good	0.557 \| good	20.326 \| good	0.29 \| good
2025-10-23T19:00:00.000Z	49 \| good	9.442 \| good	36.779 \| good	9.628 \| good	0.472 \| good	17.873 \| good	0.203 \| good
2025-10-23T20:00:00.000Z	44 \| good	7.532 \| good	29.15 \| good	14.326 \| good	0.566 \| good	15.534 \| good	0.196 \| good
2025-10-23T21:00:00.000Z	38 \| good	6.596 \| good	23.552 \| good	15.615 \| good	0.23 \| good	10.028 \| good	0.11 \| good
2025-10-23T22:00:00.000Z	27 \| good	5.315 \| good	20.114 \| good	20.538 \| good	0.393 \| good	10.638 \| good	0.106 \| good
2025-10-23T23:00:00.000Z	27 \| good	4.838 \| good	18.513 \| good	20.526 \| good	0.393 \| good	10.169 \| good	0.106 \| good
2025-10-24T00:00:00.000Z	27 \| good	5.144 \| good	17.863 \| good	21.055 \| good	0.311 \| good	9.5 \| good	0.196 \| good
2025-10-24T01:00:00.000Z	27 \| good	5.244 \| good	18.386 \| good	17.748 \| good	0.308 \| good	10.988 \| good	0.202 \| good
2025-10-24T02:00:00.000Z	27 \| good	5.302 \| good	19.029 \| good	17.992 \| good	0.305 \| good	11.5 \| good	0.199 \| good
2025-10-24T03:00:00.000Z	58 \| moderate	13.414 \| fine	59.707 \| fine	4.953 \| good	0.943 \| good	19.577 \| good	0.278 \| good
2025-10-24T04:00:00.000Z	38 \| good	6.76 \| good	26.027 \| good	15.015 \| good	0.301 \| good	19.114 \| good	0.2 \| good
2025-10-24T05:00:00.000Z	44 \| good	8.095 \| good	31.444 \| good	13.192 \| good	0.473 \| good	16.486 \| good	0.286 \| good
2025-10-24T06:00:00.000Z	49 \| good	8.955 \| good	35.558 \| good	11.758 \| good	0.474 \| good	19.88 \| good	0.286 \| good
2025-10-24T07:00:00.000Z	52 \| moderate	9.94 \| good	36.013 \| good	11.589 \| good	0.475 \| good	19.63 \| good	0.286 \| good
2025-10-24T08:00:00.000Z	52 \| moderate	10.367 \| good	36.908 \| good	10.844 \| good	0.389 \| good	19.017 \| good	0.283 \| good
2025-10-24T09:00:00.000Z	52 \| moderate	9.873 \| good	36.766 \| good	12.485 \| good	0.308 \| good	13.53 \| good	0.196 \| good
2025-10-24T10:00:00.000Z	52 \| moderate	10.127 \| good	39.506 \| good	13.729 \| good	0.307 \| good	13.114 \| good	0.196 \| good
2025-10-24T11:00:00.000Z	52 \| moderate	9.901 \| good	36.274 \| good	12.602 \| good	0.389 \| good	12.059 \| good	0.196 \| good
2025-10-24T12:00:00.000Z	49 \| good	8.892 \| good	35.381 \| good	11.508 \| good	0.397 \| good	14.54 \| good	0.193 \| good
2025-10-24T13:00:00.000Z	49 \| good	9.2 \| good	33.953 \| good	10.214 \| good	0.311 \| good	13.382 \| good	0.193 \| good
2025-10-24T14:00:00.000Z	49 \| good	8.629 \| good	32.589 \| good	12.615 \| good	0.225 \| good	7.234 \| good	0.196 \| good
2025-10-24T15:00:00.000Z	44 \| good	8.21 \| good	28.477 \| good	10.69 \| good	0.311 \| good	15.766 \| good	0.196 \| good
2025-10-24T16:00:00.000Z	38 \| good	6.926 \| good	26.387 \| good	14.947 \| good	0.307 \| good	15.563 \| good	0.192 \| good
2025-10-24T17:00:00.000Z	33 \| good	6.356 \| good	23.631 \| good	16.733 \| good	0.307 \| good	22.279 \| good	0.192 \| good
2025-10-24T18:00:00.000Z	33 \| good	6.122 \| good	23.223 \| good	16.105 \| good	0.393 \| good	19.005 \| good	0.192 \| good
2025-10-24T19:00:00.000Z	27 \| good	5.374 \| good	20.438 \| good	18.031 \| good	0.393 \| good	13.515 \| good	0.192 \| good
2025-10-24T20:00:00.000Z	27 \| good	4.596 \| good	14.547 \| good	17.545 \| good	0.397 \| good	13.295 \| good	0.189 \| good
2025-10-24T21:00:00.000Z	18 \| good	2.507 \| good	10.69 \| good	19.199 \| good	0.325 \| good	12.975 \| good	0.189 \| good
2025-10-24T22:00:00.000Z	19 \| good	2.073 \| good	8.567 \| good	20.602 \| good	0.348 \| good	12.835 \| good	0.105 \| good
2025-10-24T23:00:00.000Z	25 \| good	2.71 \| good	12.361 \| good	27.106 \| good	0.348 \| good	11.066 \| good	0.193 \| good
2025-10-25T00:00:00.000Z	24 \| good	2.232 \| good	11.37 \| good	26.004 \| good	0.348 \| good	13.595 \| good	0.196 \| good
2025-10-25T01:00:00.000Z	25 \| good	1.326 \| good	9.788 \| good	26.756 \| good	0.345 \| good	13.469 \| good	0.198 \| good
2025-10-25T02:00:00.000Z	26 \| good	1.521 \| good	9.673 \| good	27.785 \| good	0.345 \| good	13.238 \| good	0.108 \| good
2025-10-25T03:00:00.000Z	26 \| good	2.395 \| good	10.331 \| good	28.057 \| good	0.587 \| good	7.907 \| good	0.149 \| good
2025-10-25T04:00:00.000Z	25 \| good	2.912 \| good	11.125 \| good	26.582 \| good	0.324 \| good	9.869 \| good	0.1 \| good
2025-10-25T05:00:00.000Z	23 \| good	2.508 \| good	9.375 \| good	25.089 \| good	0.324 \| good	6.899 \| good	0.103 \| good
2025-10-25T05:00:00.000Z	23 \| good	2.508 \| good	9.375 \| good	25.089 \| good	0.324 \| good	6.899 \| good	0.103 \| good
2025-10-24T17:00:00.000Z	22 \| good	2.476 \| good	10.512 \| good	23.824 \| good	0.332 \| good	3.54 \| good	0.13 \| good
2025-10-24T18:00:00.000Z	19 \| good	3.039 \| good	13.118 \| good	21.057 \| good	0.319 \| good	3.693 \| good	0.129 \| good
2025-10-24T19:00:00.000Z	22 \| good	4.076 \| good	17.823 \| good	19.242 \| good	0.356 \| good	4.504 \| good	0.134 \| good
2025-10-24T20:00:00.000Z	26 \| good	3.446 \| good	15.009 \| good	27.7 \| good	0.363 \| good	4.33 \| good	0.132 \| good
2025-10-24T21:00:00.000Z	23 \| good	3.837 \| good	17.032 \| good	25.301 \| good	0.351 \| good	4.221 \| good	0.126 \| good
2025-10-24T22:00:00.000Z	24 \| good	3.716 \| good	16.043 \| good	26.418 \| good	0.382 \| good	5.026 \| good	0.129 \| good
2025-10-24T23:00:00.000Z	28 \| good	2.452 \| good	10.402 \| good	29.615 \| good	0.413 \| good	5.83 \| good	0.132 \| good
2025-10-25T00:00:00.000Z	27 \| good	2.583 \| good	10.892 \| good	28.71 \| good	0.443 \| good	6.635 \| good	0.135 \| good
2025-10-25T01:00:00.000Z	28 \| good	2.4 \| good	10.218 \| good	29.766 \| good	0.665 \| good	11.785 \| good	0.188 \| good
2025-10-25T02:00:00.000Z	24 \| good	3.37 \| good	14.325 \| good	25.538 \| good	0.68 \| good	11.365 \| good	0.186 \| good
2025-10-25T03:00:00.000Z	22 \| good	3.597 \| good	15.305 \| good	22.569 \| good	0.694 \| good	10.945 \| good	0.185 \| good
2025-10-25T04:00:00.000Z	26 \| good	2.591 \| good	10.703 \| good	27.992 \| good	0.515 \| good	6.407 \| good	0.14 \| good
2025-10-25T05:00:00.000Z	26 \| good	2.934 \| good	11.951 \| good	27.759 \| good	0.503 \| good	5.039 \| good	0.133 \| good
2025-10-25T06:00:00.000Z	26 \| good	2.937 \| good	12.525 \| good	27.673 \| good	0.491 \| good	3.671 \| good	0.127 \| good
2025-10-25T07:00:00.000Z	22 \| good	3.325 \| good	14.545 \| good	24.391 \| good	0.511 \| good	3.152 \| good	0.121 \| good
2025-10-25T08:00:00.000Z	22 \| good	3.251 \| good	13.791 \| good	23.809 \| good	0.532 \| good	2.634 \| good	0.116 \| good
2025-10-25T09:00:00.000Z	22 \| good	2.802 \| good	11.889 \| good	24.281 \| good	0.334 \| good	2.371 \| good	0.117 \| good
2025-10-25T10:00:00.000Z	21 \| good	2.714 \| good	11.592 \| good	22.944 \| good	0.346 \| good	2.357 \| good	0.115 \| good
2025-10-25T11:00:00.000Z	21 \| good	2.745 \| good	11.58 \| good	22.763 \| good	0.359 \| good	2.343 \| good	0.114 \| good
2025-10-25T12:00:00.000Z	22 \| good	4.115 \| good	17.867 \| good	23.407 \| good	0.624 \| good	2.483 \| good	0.11 \| good
2025-10-25T13:00:00.000Z	22 \| good	4.455 \| good	19.413 \| good	24.009 \| good	0.625 \| good	3.701 \| good	0.118 \| good
2025-10-25T14:00:00.000Z	27 \| good	4.55 \| good	19.674 \| good	21.679 \| good	0.626 \| good	4.919 \| good	0.126 \| good
2025-10-25T15:00:00.000Z	27 \| good	5.142 \| good	22.56 \| good	18.139 \| good	0.627 \| good	6.137 \| good	0.134 \| good
2025-10-25T16:00:00.000Z	27 \| good	4.621 \| good	19.864 \| good	23.284 \| good	0.582 \| good	6.007 \| good	0.138 \| good
2025-10-25T17:00:00.000Z	24 \| good	2.919 \| good	12.088 \| good	26.411 \| good	0.389 \| good	5.331 \| good	0.143 \| good
2025-10-25T18:00:00.000Z	22 \| good	3.772 \| good	16.371 \| good	21.365 \| good	0.358 \| good	4.949 \| good	0.145 \| good
2025-10-25T19:00:00.000Z	22 \| good	4.036 \| good	17.357 \| good	20.713 \| good	0.336 \| good	4.161 \| good	0.139 \| good
2025-10-25T20:00:00.000Z	27 \| good	5.324 \| good	23.476 \| good	22.784 \| good	0.402 \| good	3.837 \| good	0.134 \| good
2025-10-25T21:00:00.000Z	27 \| good	4.791 \| good	21.1 \| good	26.043 \| good	0.356 \| good	2.884 \| good	0.129 \| good
2025-10-25T22:00:00.000Z	30 \| good	3.909 \| good	16.921 \| good	31.885 \| good	0.324 \| good	2.854 \| good	0.127 \| good
2025-10-25T23:00:00.000Z	31 \| good	3.248 \| good	13.578 \| good	33.628 \| good	0.291 \| good	2.824 \| good	0.126 \| good
2025-10-26T00:00:00.000Z	27 \| good	4.387 \| good	19.409 \| good	28.504 \| good	0.258 \| good	2.795 \| good	0.124 \| good
2025-10-26T01:00:00.000Z	27 \| good	5.023 \| good	22.186 \| good	25.091 \| good	0.28 \| good	3.063 \| good	0.128 \| good
2025-10-26T02:00:00.000Z	27 \| good	5.439 \| good	23.944 \| good	24.946 \| good	0.296 \| good	3.264 \| good	0.131 \| good
2025-10-26T03:00:00.000Z	25 \| good	3.838 \| good	16.737 \| good	26.908 \| good	0.312 \| good	3.465 \| good	0.135 \| good
2025-10-26T04:00:00.000Z	30 \| good	2.184 \| good	8.811 \| good	32.153 \| good	0.343 \| good	2.321 \| good	0.112 \| good
2025-10-26T05:00:00.000Z	31 \| good	2.219 \| good	8.776 \| good	34.486 \| good	0.424 \| good	2.019 \| good	0.108 \| good
2025-10-26T06:00:00.000Z	31 \| good	1.976 \| good	8.27 \| good	33.739 \| good	0.504 \| good	1.717 \| good	0.104 \| good
2025-10-26T07:00:00.000Z	31 \| good	1.779 \| good	7.269 \| good	33.388 \| good	0.503 \| good	1.579 \| good	0.103 \| good
2025-10-26T08:00:00.000Z	31 \| good	1.194 \| good	4.778 \| good	33.824 \| good	0.501 \| good	1.44 \| good	0.101 \| good
2025-10-26T09:00:00.000Z	33 \| good	1.009 \| good	4.048 \| good	35.706 \| good	0.357 \| good	1.095 \| good	0.106 \| good
2025-10-26T10:00:00.000Z	33 \| good	1.028 \| good	3.944 \| good	35.767 \| good	0.385 \| good	1.167 \| good	0.105 \| good
2025-10-26T11:00:00.000Z	32 \| good	1.331 \| good	5.555 \| good	35.294 \| good	0.414 \| good	1.239 \| good	0.105 \| good
2025-10-26T12:00:00.000Z	31 \| good	1.963 \| good	8.088 \| good	33.159 \| good	0.49 \| good	1.642 \| good	0.101 \| good
2025-10-26T13:00:00.000Z	28 \| good	2.459 \| good	10.003 \| good	29.993 \| good	0.508 \| good	2.29 \| good	0.105 \| good
2025-10-26T14:00:00.000Z	31 \| good	2.434 \| good	9.88 \| good	32.646 \| good	0.526 \| good	2.937 \| good	0.11 \| good
2025-10-26T15:00:00.000Z	29 \| good	2.774 \| good	11.404 \| good	30.825 \| good	0.543 \| good	3.584 \| good	0.115 \| good
2025-10-26T16:00:00.000Z	28 \| good	1.852 \| good	7.612 \| good	29.65 \| good	0.52 \| good	3.312 \| good	0.115 \| good

Real-time air quality index in Mercer Island, Washington today

Common air pollutants in Mercer Island, Washington

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Mercer Island, Washington air quality forecast and history

Empower business decisions with accurate air quality data

Mercer Island, Washington air quality map: Real-time AQI near you

Air quality in nearby cities

Bellevue, Washington

Newcastle, Washington

Bryn MawrSkyway, Washington

Seattle, Washington

Renton, Washington

Tukwila, Washington

How accurate is Washington, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently is the air quality data for Mercer Island, Washington updated?

When did Mercer Island, Washington experience the worst air quality in the last 24 hours?

When did Mercer Island, Washington have its best air quality in the last 24 hours?

What is the real-time air quality index for Mercer Island, Washington?

Which pollutant is found most often in Mercer Island, Washington?

What can I do if the air quality in Mercer Island, Washington is poor?

What are the current PM2.5 levels in Mercer Island, Washington?

What are the current PM10 levels at Mercer Island, Washington?

What are the current carbon monoxide (CO) levels at Mercer Island, Washington?

What are the current sulfur dioxide (SO2) levels at Mercer Island, Washington?

What are the current ozone (O3) levels at Mercer Island, Washington?

What are the current nitrogen dioxide (NO2) levels at Mercer Island, Washington?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What are the current PM_2.5 levels in Mercer Island, Washington?

What are the current PM₁₀ levels at Mercer Island, Washington?

What are the current sulfur dioxide (SO₂) levels at Mercer Island, Washington?

What are the current ozone (O₃) levels at Mercer Island, Washington?

What are the current nitrogen dioxide (NO₂) levels at Mercer Island, Washington?