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

The current PM10 levels in Mercer Island, Washington are 24.982 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 0.401 ppb.

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

The current ozone (O3) levels at Mercer Island, Washington is 34.048 ppm.

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

The current nitrogen dioxide (NO2) levels at Mercer Island, Washington is 15.02 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 6.715 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)

6.71 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

24.98 μg/m³

155

255

425

605+

Ozone (O₃)

34.05 ppb

201

201+

Sulfur Dioxide (SO₂)

0.40 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

15.02 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.19 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
2026-07-19T01:00:00.000Z	29 \| good	3.552 \| good	12.76 \| good	31.326 \| good	0.139 \| good	5.792 \| good	0.141 \| good
2026-07-19T02:00:00.000Z	31 \| good	4.013 \| good	15.174 \| good	34.343 \| good	0.346 \| good	10.406 \| good	0.183 \| good
2026-07-19T03:00:00.000Z	38 \| good	6.717 \| good	29.768 \| good	26.72 \| good	0.364 \| good	2.956 \| good	0.118 \| good
2026-07-19T04:00:00.000Z	28 \| good	3.314 \| good	14.384 \| good	29.514 \| good	0.861 \| good	7.056 \| good	0.141 \| good
2026-07-19T05:00:00.000Z	26 \| good	3.437 \| good	14.359 \| good	27.992 \| good	0.386 \| good	8.93 \| good	0.103 \| good
2026-07-19T06:00:00.000Z	25 \| good	3.173 \| good	13.947 \| good	26.674 \| good	0.242 \| good	7.592 \| good	0.105 \| good
2026-07-19T07:00:00.000Z	26 \| good	3.173 \| good	13.947 \| good	28.253 \| good	0.243 \| good	7.538 \| good	0.105 \| good
2026-07-19T08:00:00.000Z	20 \| good	2.996 \| good	13.324 \| good	21.937 \| good	0.166 \| good	6.653 \| good	0.109 \| good
2026-07-19T09:00:00.000Z	22 \| good	3.551 \| good	13.726 \| good	16.979 \| good	0.163 \| good	6.815 \| good	0.11 \| good
2026-07-19T10:00:00.000Z	16 \| good	3.379 \| good	13.737 \| good	16.67 \| good	0.24 \| good	5.437 \| good	0.105 \| good
2026-07-19T11:00:00.000Z	16 \| good	3.459 \| good	13.568 \| good	16.982 \| good	0.172 \| good	5.153 \| good	0.103 \| good
2026-07-19T12:00:00.000Z	22 \| good	4.069 \| good	15.85 \| good	18.695 \| good	0.1 \| good	4.629 \| good	0.109 \| good
2026-07-19T13:00:00.000Z	22 \| good	4.085 \| good	15.225 \| good	15.651 \| good	0.1 \| good	3.721 \| good	0.109 \| good
2026-07-19T14:00:00.000Z	22 \| good	4.039 \| good	14.91 \| good	14.482 \| good	0.444 \| good	3.974 \| good	0.109 \| good
2026-07-19T15:00:00.000Z	22 \| good	3.795 \| good	14.633 \| good	17.092 \| good	0.108 \| good	4.001 \| good	0.103 \| good
2026-07-19T16:00:00.000Z	22 \| good	4.193 \| good	16.164 \| good	17.499 \| good	0.107 \| good	7.002 \| good	0.144 \| good
2026-07-19T17:00:00.000Z	22 \| good	4.384 \| good	17.127 \| good	17.12 \| good	0.352 \| good	7.025 \| good	0.144 \| good
2026-07-19T18:00:00.000Z	27 \| good	4.602 \| good	17.859 \| good	20.015 \| good	0.166 \| good	6.638 \| good	0.141 \| good
2026-07-19T19:00:00.000Z	27 \| good	4.61 \| good	17.555 \| good	22.857 \| good	0.156 \| good	6.408 \| good	0.147 \| good
2026-07-19T20:00:00.000Z	24 \| good	4.455 \| good	16.953 \| good	25.846 \| good	0.147 \| good	6.552 \| good	0.147 \| good
2026-07-19T21:00:00.000Z	27 \| good	3.596 \| good	15.734 \| good	28.577 \| good	0.322 \| good	5.026 \| good	0.144 \| good
2026-07-19T22:00:00.000Z	30 \| good	3.483 \| good	15.633 \| good	31.529 \| good	0.319 \| good	5.014 \| good	0.147 \| good
2026-07-19T23:00:00.000Z	31 \| good	3.984 \| good	15.59 \| good	33.783 \| good	0.319 \| good	4.576 \| good	0.141 \| good
2026-07-20T00:00:00.000Z	31 \| good	3.493 \| good	15.56 \| good	34.072 \| good	0.323 \| good	4.584 \| good	0.144 \| good
2026-07-20T01:00:00.000Z	30 \| good	4.534 \| good	16.929 \| good	32.1 \| good	0.327 \| good	5.91 \| good	0.185 \| good
2026-07-20T02:00:00.000Z	32 \| good	3.556 \| good	15.264 \| good	34.75 \| good	0.334 \| good	7.205 \| good	0.185 \| good
2026-07-20T03:00:00.000Z	31 \| good	3.569 \| good	15.425 \| good	32.914 \| good	0.341 \| good	7.676 \| good	0.185 \| good
2026-07-20T04:00:00.000Z	30 \| good	3.856 \| good	15.659 \| good	32.417 \| good	0.382 \| good	9.544 \| good	0.227 \| good
2026-07-20T05:00:00.000Z	23 \| good	3.832 \| good	15.788 \| good	25.379 \| good	0.232 \| good	8.246 \| good	0.147 \| good
2026-07-20T06:00:00.000Z	26 \| good	3.685 \| good	14.568 \| good	28.354 \| good	0.24 \| good	8.949 \| good	0.103 \| good
2026-07-20T07:00:00.000Z	25 \| good	3.685 \| good	14.568 \| good	27.426 \| good	0.24 \| good	8.083 \| good	0.103 \| good
2026-07-20T08:00:00.000Z	22 \| good	3.682 \| good	14.808 \| good	20.669 \| good	0.224 \| good	6.697 \| good	0.106 \| good
2026-07-20T09:00:00.000Z	22 \| good	3.937 \| good	14.943 \| good	17.727 \| good	0.136 \| good	7.769 \| good	0.106 \| good
2026-07-20T10:00:00.000Z	22 \| good	3.65 \| good	15.194 \| good	19.408 \| good	0.141 \| good	6.943 \| good	0.106 \| good
2026-07-20T11:00:00.000Z	16 \| good	3.427 \| good	14.866 \| good	17.148 \| good	0.19 \| good	6.394 \| good	0.106 \| good
2026-07-20T12:00:00.000Z	16 \| good	3.461 \| good	14.985 \| good	15.824 \| good	0.194 \| good	7.179 \| good	0.106 \| good
2026-07-20T13:00:00.000Z	16 \| good	3.461 \| good	14.985 \| good	13.92 \| good	0.193 \| good	6.484 \| good	0.106 \| good
2026-07-20T14:00:00.000Z	16 \| good	3.157 \| good	13.925 \| good	14.666 \| good	0.108 \| good	10.83 \| good	0.106 \| good
2026-07-20T15:00:00.000Z	16 \| good	3.411 \| good	16.392 \| good	16.843 \| good	0.121 \| good	8.721 \| good	0.109 \| good
2026-07-20T16:00:00.000Z	19 \| good	3.215 \| good	13.753 \| good	19.994 \| good	0.262 \| good	9.614 \| good	0.103 \| good
2026-07-20T17:00:00.000Z	22 \| good	3.835 \| good	15.413 \| good	22.558 \| good	0.346 \| good	9.632 \| good	0.147 \| good
2026-07-20T18:00:00.000Z	22 \| good	3.835 \| good	15.413 \| good	20.666 \| good	0.347 \| good	10.308 \| good	0.15 \| good
2026-07-20T19:00:00.000Z	22 \| good	3.517 \| good	15.627 \| good	20.79 \| good	0.287 \| good	10.915 \| good	0.15 \| good
2026-07-20T20:00:00.000Z	27 \| good	4.927 \| good	17.874 \| good	25.499 \| good	0.263 \| good	13.877 \| good	0.194 \| good
2026-07-20T21:00:00.000Z	33 \| good	5.508 \| good	19.501 \| good	26.703 \| good	0.418 \| good	15.207 \| good	0.194 \| good
2026-07-20T22:00:00.000Z	27 \| good	5.475 \| good	22.031 \| good	29.486 \| good	0.267 \| good	14.358 \| good	0.194 \| good
2026-07-20T23:00:00.000Z	33 \| good	5.708 \| good	22.631 \| good	36.251 \| good	0.4 \| good	14.316 \| good	0.194 \| good
2026-07-21T00:00:00.000Z	38 \| good	6.715 \| good	24.982 \| good	34.048 \| good	0.401 \| good	15.02 \| good	0.186 \| good
2026-07-21T01:00:00.000Z	84 \| moderate	16.721 \| fine	73.534 \| fine	65.293 \| fine	1.358 \| good	3.377 \| good	0.151 \| good
2026-07-21T02:00:00.000Z	73 \| moderate	20.578 \| fine	90.925 \| fine	56.052 \| fine	1.345 \| good	4.32 \| good	0.159 \| good
2026-07-21T03:00:00.000Z	94 \| moderate	32.237 \| fine	139.996 \| fine	49.744 \| good	1.286 \| good	8.291 \| good	0.192 \| good
2026-07-21T04:00:00.000Z	112 \| sensitive	40.027 \| moderate	176.55 \| moderate	43.08 \| good	1.351 \| good	14.305 \| good	0.24 \| good
2026-07-21T05:00:00.000Z	122 \| sensitive	44.156 \| moderate	197.511 \| moderate	40.567 \| good	1.388 \| good	18.209 \| good	0.276 \| good
2026-07-21T06:00:00.000Z	117 \| sensitive	42.244 \| moderate	187.747 \| moderate	39.57 \| good	1.369 \| good	20.575 \| good	0.3 \| good
2026-07-21T07:00:00.000Z	110 \| sensitive	38.89 \| moderate	172.169 \| moderate	39.099 \| good	1.266 \| good	21.557 \| good	0.316 \| good
2026-07-21T08:00:00.000Z	97 \| moderate	33.923 \| fine	147.629 \| fine	38.469 \| good	1.132 \| good	20.678 \| good	0.32 \| good
2026-07-21T09:00:00.000Z	98 \| moderate	34.058 \| fine	148.633 \| fine	37.019 \| good	1.05 \| good	19.138 \| good	0.314 \| good
2026-07-21T10:00:00.000Z	102 \| sensitive	35.781 \| moderate	157.078 \| moderate	35.812 \| good	1.005 \| good	17.559 \| good	0.305 \| good
2026-07-21T11:00:00.000Z	112 \| sensitive	40.216 \| moderate	178.298 \| moderate	32.904 \| good	0.969 \| good	16.412 \| good	0.298 \| good
2026-07-21T12:00:00.000Z	115 \| sensitive	41.415 \| moderate	183.36 \| moderate	34.112 \| good	0.899 \| good	15.546 \| good	0.294 \| good
2026-07-21T13:00:00.000Z	119 \| sensitive	42.891 \| moderate	191.513 \| moderate	29.016 \| good	0.836 \| good	14.558 \| good	0.293 \| good
2026-07-21T14:00:00.000Z	119 \| sensitive	43.18 \| moderate	192.404 \| moderate	31.507 \| good	0.777 \| good	12.897 \| good	0.298 \| good
2026-07-21T15:00:00.000Z	112 \| sensitive	39.607 \| moderate	174.437 \| moderate	41.262 \| good	0.794 \| good	10.868 \| good	0.302 \| good
2026-07-21T16:00:00.000Z	101 \| sensitive	35.45 \| fine	155.133 \| moderate	47.722 \| good	1.18 \| good	8.257 \| good	0.249 \| good
2026-07-21T17:00:00.000Z	90 \| moderate	29.935 \| fine	129.976 \| fine	54.209 \| good	1.458 \| good	6.952 \| good	0.233 \| good
2026-07-21T18:00:00.000Z	79 \| moderate	24.41 \| fine	106.047 \| fine	60.838 \| fine	1.567 \| good	5.568 \| good	0.223 \| good
2026-07-21T19:00:00.000Z	90 \| moderate	22.349 \| fine	97.601 \| fine	66.988 \| fine	1.462 \| good	4.163 \| good	0.211 \| good
2026-07-21T20:00:00.000Z	100 \| moderate	20.55 \| fine	90.862 \| fine	70.408 \| fine	1.291 \| good	2.983 \| good	0.198 \| good
2026-07-21T21:00:00.000Z	105 \| sensitive	19.309 \| fine	85.361 \| fine	71.856 \| moderate	1.134 \| good	2.296 \| good	0.188 \| good
2026-07-21T22:00:00.000Z	101 \| sensitive	17.893 \| fine	79.634 \| fine	70.549 \| fine	1.006 \| good	1.955 \| good	0.18 \| good
2026-07-21T23:00:00.000Z	90 \| moderate	16.608 \| fine	74.122 \| fine	67.443 \| fine	0.894 \| good	1.792 \| good	0.174 \| good
2026-07-22T00:00:00.000Z	94 \| moderate	32.203 \| fine	139.7 \| fine	61.62 \| fine	0.823 \| good	1.823 \| good	0.173 \| good
2026-07-22T01:00:00.000Z	117 \| sensitive	41.541 \| moderate	184.322 \| moderate	58.686 \| fine	0.785 \| good	2.153 \| good	0.174 \| good
2026-07-22T02:00:00.000Z	140 \| sensitive	51.402 \| moderate	233.439 \| moderate	55.136 \| fine	0.771 \| good	3.092 \| good	0.18 \| good
2026-07-22T03:00:00.000Z	132 \| sensitive	47.805 \| moderate	215.186 \| moderate	49.98 \| good	0.781 \| good	5.868 \| good	0.203 \| good
2026-07-22T04:00:00.000Z	149 \| sensitive	55.284 \| moderate	245.248 \| moderate	44.023 \| good	0.813 \| good	9.66 \| good	0.236 \| good
2026-07-22T05:00:00.000Z	156 \| unhealthy	61.77 \| poor	260.513 \| poor	43.575 \| good	0.816 \| good	11.843 \| good	0.257 \| good
2026-07-22T06:00:00.000Z	157 \| unhealthy	63.741 \| poor	264.038 \| poor	41.165 \| good	0.783 \| good	13.199 \| good	0.268 \| good
2026-07-22T07:00:00.000Z	154 \| unhealthy	60.499 \| poor	260.143 \| poor	39.121 \| good	0.733 \| good	13.949 \| good	0.276 \| good
2026-07-22T08:00:00.000Z	166 \| unhealthy	76.529 \| poor	277.236 \| poor	41.51 \| good	0.677 \| good	13.764 \| good	0.278 \| good
2026-07-22T09:00:00.000Z	163 \| unhealthy	71.998 \| poor	271.73 \| poor	38.359 \| good	0.625 \| good	13.231 \| good	0.276 \| good
2026-07-22T10:00:00.000Z	160 \| unhealthy	69.392 \| poor	269.217 \| poor	35.809 \| good	0.585 \| good	12.623 \| good	0.272 \| good
2026-07-22T11:00:00.000Z	142 \| sensitive	52.063 \| moderate	236.043 \| moderate	29.544 \| good	0.567 \| good	12.122 \| good	0.267 \| good
2026-07-22T12:00:00.000Z	149 \| sensitive	55.368 \| moderate	249.64 \| moderate	26.385 \| good	0.556 \| good	11.659 \| good	0.262 \| good
2026-07-22T13:00:00.000Z	153 \| unhealthy	59.086 \| poor	255.759 \| poor	21.116 \| good	0.548 \| good	11.17 \| good	0.259 \| good
2026-07-22T14:00:00.000Z	157 \| unhealthy	63.843 \| poor	262.858 \| poor	24.46 \| good	0.528 \| good	10.028 \| good	0.261 \| good
2026-07-22T15:00:00.000Z	159 \| unhealthy	67.376 \| poor	266.902 \| poor	32.358 \| good	0.545 \| good	8.51 \| good	0.255 \| good
2026-07-22T16:00:00.000Z	161 \| unhealthy	69.56 \| poor	269.178 \| poor	44.997 \| good	0.695 \| good	7.357 \| good	0.233 \| good
2026-07-22T17:00:00.000Z	155 \| unhealthy	60.805 \| poor	259.573 \| poor	51.477 \| good	0.824 \| good	6.456 \| good	0.222 \| good
2026-07-22T18:00:00.000Z	145 \| sensitive	53.264 \| moderate	242.687 \| moderate	56.797 \| fine	0.888 \| good	5.086 \| good	0.215 \| good
2026-07-22T19:00:00.000Z	137 \| sensitive	49.626 \| moderate	224.626 \| moderate	60.12 \| fine	0.915 \| good	3.731 \| good	0.208 \| good
2026-07-22T20:00:00.000Z	88 \| moderate	28.885 \| fine	125.661 \| fine	65.101 \| fine	0.873 \| good	2.724 \| good	0.198 \| good
2026-07-22T21:00:00.000Z	97 \| moderate	22.011 \| fine	96.25 \| fine	69.155 \| fine	0.787 \| good	2.118 \| good	0.185 \| good
2026-07-22T22:00:00.000Z	108 \| sensitive	20.838 \| fine	91.761 \| fine	73 \| moderate	0.715 \| good	1.814 \| good	0.174 \| good
2026-07-22T23:00:00.000Z	115 \| sensitive	20.144 \| fine	88.702 \| fine	74.745 \| moderate	0.662 \| good	1.716 \| good	0.165 \| good
2026-07-23T00:00:00.000Z	122 \| sensitive	16.839 \| fine	17.746 \| good	76.77 \| moderate	0.631 \| good	1.773 \| good	0.159 \| good

Mercer Island

Empower business decisions with accurate air quality data

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

0.19ppm

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 11:00:00 on 2026-07-20.

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 03:00:00 on 2026-07-20.

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

The real-time air quality index in Mercer Island, Washington is 38, 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 6.715 μg/m³.

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

The current PM₁₀ levels in Mercer Island, Washington are 24.982 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 0.186 ppm.

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

The current sulfur dioxide (SO₂) levels in Mercer Island, Washington are 0.401 ppb.

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

The current ozone (O₃) levels at Mercer Island, Washington is 34.048 ppm.

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

The current nitrogen dioxide (NO₂) levels at Mercer Island, Washington is 15.02 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-19T01:00:00.000Z	29 \| good	3.552 \| good	12.76 \| good	31.326 \| good	0.139 \| good	5.792 \| good	0.141 \| good
2026-07-19T02:00:00.000Z	31 \| good	4.013 \| good	15.174 \| good	34.343 \| good	0.346 \| good	10.406 \| good	0.183 \| good
2026-07-19T03:00:00.000Z	38 \| good	6.717 \| good	29.768 \| good	26.72 \| good	0.364 \| good	2.956 \| good	0.118 \| good
2026-07-19T04:00:00.000Z	28 \| good	3.314 \| good	14.384 \| good	29.514 \| good	0.861 \| good	7.056 \| good	0.141 \| good
2026-07-19T05:00:00.000Z	26 \| good	3.437 \| good	14.359 \| good	27.992 \| good	0.386 \| good	8.93 \| good	0.103 \| good
2026-07-19T06:00:00.000Z	25 \| good	3.173 \| good	13.947 \| good	26.674 \| good	0.242 \| good	7.592 \| good	0.105 \| good
2026-07-19T07:00:00.000Z	26 \| good	3.173 \| good	13.947 \| good	28.253 \| good	0.243 \| good	7.538 \| good	0.105 \| good
2026-07-19T08:00:00.000Z	20 \| good	2.996 \| good	13.324 \| good	21.937 \| good	0.166 \| good	6.653 \| good	0.109 \| good
2026-07-19T09:00:00.000Z	22 \| good	3.551 \| good	13.726 \| good	16.979 \| good	0.163 \| good	6.815 \| good	0.11 \| good
2026-07-19T10:00:00.000Z	16 \| good	3.379 \| good	13.737 \| good	16.67 \| good	0.24 \| good	5.437 \| good	0.105 \| good
2026-07-19T11:00:00.000Z	16 \| good	3.459 \| good	13.568 \| good	16.982 \| good	0.172 \| good	5.153 \| good	0.103 \| good
2026-07-19T12:00:00.000Z	22 \| good	4.069 \| good	15.85 \| good	18.695 \| good	0.1 \| good	4.629 \| good	0.109 \| good
2026-07-19T13:00:00.000Z	22 \| good	4.085 \| good	15.225 \| good	15.651 \| good	0.1 \| good	3.721 \| good	0.109 \| good
2026-07-19T14:00:00.000Z	22 \| good	4.039 \| good	14.91 \| good	14.482 \| good	0.444 \| good	3.974 \| good	0.109 \| good
2026-07-19T15:00:00.000Z	22 \| good	3.795 \| good	14.633 \| good	17.092 \| good	0.108 \| good	4.001 \| good	0.103 \| good
2026-07-19T16:00:00.000Z	22 \| good	4.193 \| good	16.164 \| good	17.499 \| good	0.107 \| good	7.002 \| good	0.144 \| good
2026-07-19T17:00:00.000Z	22 \| good	4.384 \| good	17.127 \| good	17.12 \| good	0.352 \| good	7.025 \| good	0.144 \| good
2026-07-19T18:00:00.000Z	27 \| good	4.602 \| good	17.859 \| good	20.015 \| good	0.166 \| good	6.638 \| good	0.141 \| good
2026-07-19T19:00:00.000Z	27 \| good	4.61 \| good	17.555 \| good	22.857 \| good	0.156 \| good	6.408 \| good	0.147 \| good
2026-07-19T20:00:00.000Z	24 \| good	4.455 \| good	16.953 \| good	25.846 \| good	0.147 \| good	6.552 \| good	0.147 \| good
2026-07-19T21:00:00.000Z	27 \| good	3.596 \| good	15.734 \| good	28.577 \| good	0.322 \| good	5.026 \| good	0.144 \| good
2026-07-19T22:00:00.000Z	30 \| good	3.483 \| good	15.633 \| good	31.529 \| good	0.319 \| good	5.014 \| good	0.147 \| good
2026-07-19T23:00:00.000Z	31 \| good	3.984 \| good	15.59 \| good	33.783 \| good	0.319 \| good	4.576 \| good	0.141 \| good
2026-07-20T00:00:00.000Z	31 \| good	3.493 \| good	15.56 \| good	34.072 \| good	0.323 \| good	4.584 \| good	0.144 \| good
2026-07-20T01:00:00.000Z	30 \| good	4.534 \| good	16.929 \| good	32.1 \| good	0.327 \| good	5.91 \| good	0.185 \| good
2026-07-20T02:00:00.000Z	32 \| good	3.556 \| good	15.264 \| good	34.75 \| good	0.334 \| good	7.205 \| good	0.185 \| good
2026-07-20T03:00:00.000Z	31 \| good	3.569 \| good	15.425 \| good	32.914 \| good	0.341 \| good	7.676 \| good	0.185 \| good
2026-07-20T04:00:00.000Z	30 \| good	3.856 \| good	15.659 \| good	32.417 \| good	0.382 \| good	9.544 \| good	0.227 \| good
2026-07-20T05:00:00.000Z	23 \| good	3.832 \| good	15.788 \| good	25.379 \| good	0.232 \| good	8.246 \| good	0.147 \| good
2026-07-20T06:00:00.000Z	26 \| good	3.685 \| good	14.568 \| good	28.354 \| good	0.24 \| good	8.949 \| good	0.103 \| good
2026-07-20T07:00:00.000Z	25 \| good	3.685 \| good	14.568 \| good	27.426 \| good	0.24 \| good	8.083 \| good	0.103 \| good
2026-07-20T08:00:00.000Z	22 \| good	3.682 \| good	14.808 \| good	20.669 \| good	0.224 \| good	6.697 \| good	0.106 \| good
2026-07-20T09:00:00.000Z	22 \| good	3.937 \| good	14.943 \| good	17.727 \| good	0.136 \| good	7.769 \| good	0.106 \| good
2026-07-20T10:00:00.000Z	22 \| good	3.65 \| good	15.194 \| good	19.408 \| good	0.141 \| good	6.943 \| good	0.106 \| good
2026-07-20T11:00:00.000Z	16 \| good	3.427 \| good	14.866 \| good	17.148 \| good	0.19 \| good	6.394 \| good	0.106 \| good
2026-07-20T12:00:00.000Z	16 \| good	3.461 \| good	14.985 \| good	15.824 \| good	0.194 \| good	7.179 \| good	0.106 \| good
2026-07-20T13:00:00.000Z	16 \| good	3.461 \| good	14.985 \| good	13.92 \| good	0.193 \| good	6.484 \| good	0.106 \| good
2026-07-20T14:00:00.000Z	16 \| good	3.157 \| good	13.925 \| good	14.666 \| good	0.108 \| good	10.83 \| good	0.106 \| good
2026-07-20T15:00:00.000Z	16 \| good	3.411 \| good	16.392 \| good	16.843 \| good	0.121 \| good	8.721 \| good	0.109 \| good
2026-07-20T16:00:00.000Z	19 \| good	3.215 \| good	13.753 \| good	19.994 \| good	0.262 \| good	9.614 \| good	0.103 \| good
2026-07-20T17:00:00.000Z	22 \| good	3.835 \| good	15.413 \| good	22.558 \| good	0.346 \| good	9.632 \| good	0.147 \| good
2026-07-20T18:00:00.000Z	22 \| good	3.835 \| good	15.413 \| good	20.666 \| good	0.347 \| good	10.308 \| good	0.15 \| good
2026-07-20T19:00:00.000Z	22 \| good	3.517 \| good	15.627 \| good	20.79 \| good	0.287 \| good	10.915 \| good	0.15 \| good
2026-07-20T20:00:00.000Z	27 \| good	4.927 \| good	17.874 \| good	25.499 \| good	0.263 \| good	13.877 \| good	0.194 \| good
2026-07-20T21:00:00.000Z	33 \| good	5.508 \| good	19.501 \| good	26.703 \| good	0.418 \| good	15.207 \| good	0.194 \| good
2026-07-20T22:00:00.000Z	27 \| good	5.475 \| good	22.031 \| good	29.486 \| good	0.267 \| good	14.358 \| good	0.194 \| good
2026-07-20T23:00:00.000Z	33 \| good	5.708 \| good	22.631 \| good	36.251 \| good	0.4 \| good	14.316 \| good	0.194 \| good
2026-07-21T00:00:00.000Z	38 \| good	6.715 \| good	24.982 \| good	34.048 \| good	0.401 \| good	15.02 \| good	0.186 \| good
2026-07-21T01:00:00.000Z	84 \| moderate	16.721 \| fine	73.534 \| fine	65.293 \| fine	1.358 \| good	3.377 \| good	0.151 \| good
2026-07-21T02:00:00.000Z	73 \| moderate	20.578 \| fine	90.925 \| fine	56.052 \| fine	1.345 \| good	4.32 \| good	0.159 \| good
2026-07-21T03:00:00.000Z	94 \| moderate	32.237 \| fine	139.996 \| fine	49.744 \| good	1.286 \| good	8.291 \| good	0.192 \| good
2026-07-21T04:00:00.000Z	112 \| sensitive	40.027 \| moderate	176.55 \| moderate	43.08 \| good	1.351 \| good	14.305 \| good	0.24 \| good
2026-07-21T05:00:00.000Z	122 \| sensitive	44.156 \| moderate	197.511 \| moderate	40.567 \| good	1.388 \| good	18.209 \| good	0.276 \| good
2026-07-21T06:00:00.000Z	117 \| sensitive	42.244 \| moderate	187.747 \| moderate	39.57 \| good	1.369 \| good	20.575 \| good	0.3 \| good
2026-07-21T07:00:00.000Z	110 \| sensitive	38.89 \| moderate	172.169 \| moderate	39.099 \| good	1.266 \| good	21.557 \| good	0.316 \| good
2026-07-21T08:00:00.000Z	97 \| moderate	33.923 \| fine	147.629 \| fine	38.469 \| good	1.132 \| good	20.678 \| good	0.32 \| good
2026-07-21T09:00:00.000Z	98 \| moderate	34.058 \| fine	148.633 \| fine	37.019 \| good	1.05 \| good	19.138 \| good	0.314 \| good
2026-07-21T10:00:00.000Z	102 \| sensitive	35.781 \| moderate	157.078 \| moderate	35.812 \| good	1.005 \| good	17.559 \| good	0.305 \| good
2026-07-21T11:00:00.000Z	112 \| sensitive	40.216 \| moderate	178.298 \| moderate	32.904 \| good	0.969 \| good	16.412 \| good	0.298 \| good
2026-07-21T12:00:00.000Z	115 \| sensitive	41.415 \| moderate	183.36 \| moderate	34.112 \| good	0.899 \| good	15.546 \| good	0.294 \| good
2026-07-21T13:00:00.000Z	119 \| sensitive	42.891 \| moderate	191.513 \| moderate	29.016 \| good	0.836 \| good	14.558 \| good	0.293 \| good
2026-07-21T14:00:00.000Z	119 \| sensitive	43.18 \| moderate	192.404 \| moderate	31.507 \| good	0.777 \| good	12.897 \| good	0.298 \| good
2026-07-21T15:00:00.000Z	112 \| sensitive	39.607 \| moderate	174.437 \| moderate	41.262 \| good	0.794 \| good	10.868 \| good	0.302 \| good
2026-07-21T16:00:00.000Z	101 \| sensitive	35.45 \| fine	155.133 \| moderate	47.722 \| good	1.18 \| good	8.257 \| good	0.249 \| good
2026-07-21T17:00:00.000Z	90 \| moderate	29.935 \| fine	129.976 \| fine	54.209 \| good	1.458 \| good	6.952 \| good	0.233 \| good
2026-07-21T18:00:00.000Z	79 \| moderate	24.41 \| fine	106.047 \| fine	60.838 \| fine	1.567 \| good	5.568 \| good	0.223 \| good
2026-07-21T19:00:00.000Z	90 \| moderate	22.349 \| fine	97.601 \| fine	66.988 \| fine	1.462 \| good	4.163 \| good	0.211 \| good
2026-07-21T20:00:00.000Z	100 \| moderate	20.55 \| fine	90.862 \| fine	70.408 \| fine	1.291 \| good	2.983 \| good	0.198 \| good
2026-07-21T21:00:00.000Z	105 \| sensitive	19.309 \| fine	85.361 \| fine	71.856 \| moderate	1.134 \| good	2.296 \| good	0.188 \| good
2026-07-21T22:00:00.000Z	101 \| sensitive	17.893 \| fine	79.634 \| fine	70.549 \| fine	1.006 \| good	1.955 \| good	0.18 \| good
2026-07-21T23:00:00.000Z	90 \| moderate	16.608 \| fine	74.122 \| fine	67.443 \| fine	0.894 \| good	1.792 \| good	0.174 \| good
2026-07-22T00:00:00.000Z	94 \| moderate	32.203 \| fine	139.7 \| fine	61.62 \| fine	0.823 \| good	1.823 \| good	0.173 \| good
2026-07-22T01:00:00.000Z	117 \| sensitive	41.541 \| moderate	184.322 \| moderate	58.686 \| fine	0.785 \| good	2.153 \| good	0.174 \| good
2026-07-22T02:00:00.000Z	140 \| sensitive	51.402 \| moderate	233.439 \| moderate	55.136 \| fine	0.771 \| good	3.092 \| good	0.18 \| good
2026-07-22T03:00:00.000Z	132 \| sensitive	47.805 \| moderate	215.186 \| moderate	49.98 \| good	0.781 \| good	5.868 \| good	0.203 \| good
2026-07-22T04:00:00.000Z	149 \| sensitive	55.284 \| moderate	245.248 \| moderate	44.023 \| good	0.813 \| good	9.66 \| good	0.236 \| good
2026-07-22T05:00:00.000Z	156 \| unhealthy	61.77 \| poor	260.513 \| poor	43.575 \| good	0.816 \| good	11.843 \| good	0.257 \| good
2026-07-22T06:00:00.000Z	157 \| unhealthy	63.741 \| poor	264.038 \| poor	41.165 \| good	0.783 \| good	13.199 \| good	0.268 \| good
2026-07-22T07:00:00.000Z	154 \| unhealthy	60.499 \| poor	260.143 \| poor	39.121 \| good	0.733 \| good	13.949 \| good	0.276 \| good
2026-07-22T08:00:00.000Z	166 \| unhealthy	76.529 \| poor	277.236 \| poor	41.51 \| good	0.677 \| good	13.764 \| good	0.278 \| good
2026-07-22T09:00:00.000Z	163 \| unhealthy	71.998 \| poor	271.73 \| poor	38.359 \| good	0.625 \| good	13.231 \| good	0.276 \| good
2026-07-22T10:00:00.000Z	160 \| unhealthy	69.392 \| poor	269.217 \| poor	35.809 \| good	0.585 \| good	12.623 \| good	0.272 \| good
2026-07-22T11:00:00.000Z	142 \| sensitive	52.063 \| moderate	236.043 \| moderate	29.544 \| good	0.567 \| good	12.122 \| good	0.267 \| good
2026-07-22T12:00:00.000Z	149 \| sensitive	55.368 \| moderate	249.64 \| moderate	26.385 \| good	0.556 \| good	11.659 \| good	0.262 \| good
2026-07-22T13:00:00.000Z	153 \| unhealthy	59.086 \| poor	255.759 \| poor	21.116 \| good	0.548 \| good	11.17 \| good	0.259 \| good
2026-07-22T14:00:00.000Z	157 \| unhealthy	63.843 \| poor	262.858 \| poor	24.46 \| good	0.528 \| good	10.028 \| good	0.261 \| good
2026-07-22T15:00:00.000Z	159 \| unhealthy	67.376 \| poor	266.902 \| poor	32.358 \| good	0.545 \| good	8.51 \| good	0.255 \| good
2026-07-22T16:00:00.000Z	161 \| unhealthy	69.56 \| poor	269.178 \| poor	44.997 \| good	0.695 \| good	7.357 \| good	0.233 \| good
2026-07-22T17:00:00.000Z	155 \| unhealthy	60.805 \| poor	259.573 \| poor	51.477 \| good	0.824 \| good	6.456 \| good	0.222 \| good
2026-07-22T18:00:00.000Z	145 \| sensitive	53.264 \| moderate	242.687 \| moderate	56.797 \| fine	0.888 \| good	5.086 \| good	0.215 \| good
2026-07-22T19:00:00.000Z	137 \| sensitive	49.626 \| moderate	224.626 \| moderate	60.12 \| fine	0.915 \| good	3.731 \| good	0.208 \| good
2026-07-22T20:00:00.000Z	88 \| moderate	28.885 \| fine	125.661 \| fine	65.101 \| fine	0.873 \| good	2.724 \| good	0.198 \| good
2026-07-22T21:00:00.000Z	97 \| moderate	22.011 \| fine	96.25 \| fine	69.155 \| fine	0.787 \| good	2.118 \| good	0.185 \| good
2026-07-22T22:00:00.000Z	108 \| sensitive	20.838 \| fine	91.761 \| fine	73 \| moderate	0.715 \| good	1.814 \| good	0.174 \| good
2026-07-22T23:00:00.000Z	115 \| sensitive	20.144 \| fine	88.702 \| fine	74.745 \| moderate	0.662 \| good	1.716 \| good	0.165 \| good
2026-07-23T00:00:00.000Z	122 \| sensitive	16.839 \| fine	17.746 \| good	76.77 \| moderate	0.631 \| good	1.773 \| good	0.159 \| 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

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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?