What are the current PM10 levels at Merrillville, Indiana?

The current PM10 levels in Merrillville, Indiana are 89.063 μg/m3.

What are the current sulfur dioxide (SO2) levels at Merrillville, Indiana?

The current sulfur dioxide (SO2) levels in Merrillville, Indiana are 2.06 ppb.

What are the current ozone (O3) levels at Merrillville, Indiana?

The current ozone (O3) levels at Merrillville, Indiana is 28.146 ppm.

What are the current nitrogen dioxide (NO2) levels at Merrillville, Indiana?

The current nitrogen dioxide (NO2) levels at Merrillville, Indiana is 15.229 ppb.

Real-time air quality index in Merrillville, Indiana today

Q: What are the current PM2.5 levels in Merrillville, Indiana?

The measured PM2.5 levels in Merrillville, Indiana at present are 19.226 μg/m3.

Stay updated with real-time air quality in Merrillville, Indiana 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)

Moderate

Merrillville, Indiana

Last updated: ... (Local time)

Common air pollutants in Merrillville, Indiana

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

19.23 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

89.06 μg/m³

155

255

425

605+

Ozone (O₃)

28.15 ppb

201

201+

Sulfur Dioxide (SO₂)

2.06 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

15.23 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.20 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

Merrillville, Indiana

Get Live Pollen Counts

Merrillville, Indiana

Scroll To Air Quality Map

Track live Merrillville, Indiana air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T20:00:00.000Z	39 \| good	6.55 \| good	20.12 \| good	42.308 \| good	2.66 \| good	6.838 \| good	0.201 \| good
2026-10-20T21:00:00.000Z	43 \| good	5.063 \| good	20.342 \| good	45.989 \| good	3.567 \| good	4.321 \| good	0.187 \| good
2026-10-20T22:00:00.000Z	41 \| good	5.602 \| good	19.193 \| good	44.172 \| good	4.526 \| good	3.341 \| good	0.187 \| good
2026-10-20T23:00:00.000Z	45 \| good	5.362 \| good	17.91 \| good	48.505 \| good	2.142 \| good	6.261 \| good	0.205 \| good
2026-10-21T00:00:00.000Z	41 \| good	3.612 \| good	27.781 \| good	44.171 \| good	0.753 \| good	5.882 \| good	0.238 \| good
2026-10-21T01:00:00.000Z	41 \| good	5.845 \| good	19.84 \| good	44.089 \| good	0.608 \| good	9.568 \| good	0.256 \| good
2026-10-21T02:00:00.000Z	38 \| good	7.424 \| good	21.688 \| good	40.028 \| good	0.606 \| good	18.198 \| good	0.274 \| good
2026-10-21T03:00:00.000Z	33 \| good	5.695 \| good	24.374 \| good	20.197 \| good	1.986 \| good	19.926 \| good	0.276 \| good
2026-10-21T04:00:00.000Z	49 \| good	8.753 \| good	27.228 \| good	25.134 \| good	0.682 \| good	28.985 \| good	0.289 \| good
2026-10-21T05:00:00.000Z	49 \| good	9.098 \| good	31.84 \| good	24.855 \| good	1.663 \| good	31.914 \| good	0.263 \| good
2026-10-21T06:00:00.000Z	66 \| moderate	16.886 \| fine	31.304 \| good	19.452 \| good	2.004 \| good	32.949 \| good	0.263 \| good
2026-10-21T07:00:00.000Z	64 \| moderate	16.018 \| fine	37.448 \| good	13.639 \| good	1.512 \| good	25.517 \| good	0.282 \| good
2026-10-21T08:00:00.000Z	66 \| moderate	17.402 \| fine	68.655 \| fine	20.164 \| good	0.819 \| good	21.494 \| good	0.256 \| good
2026-10-21T09:00:00.000Z	73 \| moderate	21.03 \| fine	87.947 \| fine	9.827 \| good	0.719 \| good	18.882 \| good	0.238 \| good
2026-10-21T10:00:00.000Z	75 \| moderate	22.243 \| fine	68.094 \| fine	14.181 \| good	0.71 \| good	17.127 \| good	0.282 \| good
2026-10-21T11:00:00.000Z	62 \| moderate	14.995 \| fine	50.122 \| good	12.511 \| good	0.723 \| good	19.373 \| good	0.333 \| good
2026-10-21T12:00:00.000Z	71 \| moderate	20.364 \| fine	95.562 \| fine	12.016 \| good	0.771 \| good	21.864 \| good	0.347 \| good
2026-10-21T13:00:00.000Z	64 \| moderate	15.68 \| fine	81.684 \| fine	14.047 \| good	0.759 \| good	21.106 \| good	0.347 \| good
2026-10-21T14:00:00.000Z	66 \| moderate	16.566 \| fine	57.411 \| fine	9.059 \| good	0.929 \| good	19.624 \| good	0.465 \| good
2026-10-21T15:00:00.000Z	77 \| moderate	22.514 \| fine	99.383 \| fine	17.165 \| good	1.616 \| good	18.698 \| good	0.369 \| good
2026-10-21T16:00:00.000Z	77 \| moderate	23.298 \| fine	92.635 \| fine	14.778 \| good	2.15 \| good	17.131 \| good	0.289 \| good
2026-10-21T17:00:00.000Z	67 \| moderate	18.356 \| fine	63.151 \| fine	22.923 \| good	2.17 \| good	18.702 \| good	0.226 \| good
2026-10-21T18:00:00.000Z	58 \| moderate	13.117 \| fine	37.796 \| good	31.738 \| good	2.749 \| good	13.681 \| good	0.226 \| good
2026-10-21T19:00:00.000Z	60 \| moderate	13.769 \| fine	47.978 \| good	42.873 \| good	1.49 \| good	5.376 \| good	0.226 \| good
2026-10-21T20:00:00.000Z	45 \| good	8.326 \| good	39.86 \| good	48.64 \| good	1.516 \| good	6.157 \| good	0.226 \| good
2026-10-21T21:00:00.000Z	48 \| good	7.924 \| good	29.457 \| good	52.139 \| good	1.646 \| good	6.569 \| good	0.226 \| good
2026-10-21T22:00:00.000Z	46 \| good	5.487 \| good	34.492 \| good	50.117 \| good	2.025 \| good	3.628 \| good	0.226 \| good
2026-10-21T23:00:00.000Z	49 \| good	8.634 \| good	23.301 \| good	45.775 \| good	2.453 \| good	12.11 \| good	0.245 \| good
2026-10-22T00:00:00.000Z	46 \| good	6.552 \| good	22.474 \| good	50.334 \| good	1.636 \| good	20.6 \| good	0.289 \| good
2026-10-22T01:00:00.000Z	56 \| moderate	12.054 \| good	41.815 \| good	39.166 \| good	1.136 \| good	28.776 \| good	0.307 \| good
2026-10-22T02:00:00.000Z	58 \| moderate	12.531 \| fine	55.339 \| fine	35.686 \| good	0.927 \| good	30.304 \| good	0.333 \| good
2026-10-22T03:00:00.000Z	56 \| moderate	11.706 \| good	51.796 \| good	13.974 \| good	3.061 \| good	35.254 \| good	0.458 \| good
2026-10-22T04:00:00.000Z	60 \| moderate	14.261 \| fine	27.186 \| good	12.976 \| good	1.664 \| good	26.855 \| good	0.377 \| good
2026-10-22T05:00:00.000Z	69 \| moderate	18.871 \| fine	64.294 \| fine	4.38 \| good	1.401 \| good	22.637 \| good	0.333 \| good
2026-10-22T06:00:00.000Z	67 \| moderate	18.295 \| fine	67.745 \| fine	1.172 \| good	1.38 \| good	20.877 \| good	0.41 \| good
2026-10-22T07:00:00.000Z	67 \| moderate	17.603 \| fine	60.786 \| fine	2.429 \| good	1.433 \| good	21.766 \| good	0.41 \| good
2026-10-22T08:00:00.000Z	71 \| moderate	18.099 \| fine	94.963 \| fine	3.217 \| good	1.396 \| good	21.829 \| good	0.268 \| good
2026-10-22T09:00:00.000Z	70 \| moderate	15.792 \| fine	92.587 \| fine	1.301 \| good	1.587 \| good	18.263 \| good	0.249 \| good
2026-10-22T10:00:00.000Z	56 \| moderate	11.657 \| good	47.899 \| good	5.617 \| good	1.43 \| good	15.871 \| good	0.263 \| good
2026-10-22T11:00:00.000Z	56 \| moderate	11.841 \| good	41.976 \| good	6.724 \| good	1.448 \| good	18.489 \| good	0.408 \| good
2026-10-22T12:00:00.000Z	58 \| moderate	12.968 \| fine	57.203 \| fine	3.916 \| good	1.475 \| good	19.425 \| good	0.476 \| good
2026-10-22T13:00:00.000Z	76 \| moderate	15.786 \| fine	105.841 \| fine	3.746 \| good	1.705 \| good	20.081 \| good	0.388 \| good
2026-10-22T14:00:00.000Z	66 \| moderate	17.051 \| fine	69.973 \| fine	5.007 \| good	1.787 \| good	26.951 \| good	0.413 \| good
2026-10-22T15:00:00.000Z	62 \| moderate	15.386 \| fine	61.176 \| fine	6.113 \| good	1.695 \| good	18.443 \| good	0.491 \| good
2026-10-22T16:00:00.000Z	67 \| moderate	17.901 \| fine	74.486 \| fine	10.108 \| good	2.361 \| good	19.797 \| good	0.311 \| good
2026-10-22T17:00:00.000Z	73 \| moderate	21.344 \| fine	90.449 \| fine	15.053 \| good	2.495 \| good	20.026 \| good	0.263 \| good
2026-10-22T18:00:00.000Z	73 \| moderate	20.799 \| fine	84.988 \| fine	20.843 \| good	1.779 \| good	14.513 \| good	0.238 \| good
2026-10-22T19:00:00.000Z	67 \| moderate	18.46 \| fine	70.26 \| fine	28.599 \| good	1.788 \| good	9.743 \| good	0.201 \| good
2026-10-22T19:00:00.000Z	69 \| moderate	19.226 \| fine	89.063 \| fine	28.146 \| good	2.06 \| good	15.229 \| good	0.203 \| good
2026-10-22T20:00:00.000Z	66 \| moderate	16.641 \| fine	73.447 \| fine	46.965 \| good	3.366 \| good	9.375 \| good	0.211 \| good
2026-10-22T21:00:00.000Z	66 \| moderate	17.304 \| fine	77.178 \| fine	46.57 \| good	3.15 \| good	9.395 \| good	0.209 \| good
2026-10-22T22:00:00.000Z	67 \| moderate	17.984 \| fine	79.718 \| fine	42.246 \| good	2.913 \| good	13.465 \| good	0.234 \| good
2026-10-22T23:00:00.000Z	69 \| moderate	19.179 \| fine	85.244 \| fine	35.37 \| good	2.889 \| good	23.463 \| good	0.296 \| good
2026-10-23T00:00:00.000Z	62 \| moderate	15.158 \| fine	67.364 \| fine	29.35 \| good	2.69 \| good	30.346 \| good	0.352 \| good
2026-10-23T01:00:00.000Z	58 \| moderate	12.582 \| fine	56.926 \| fine	28.234 \| good	2.534 \| good	33.211 \| good	0.377 \| good
2026-10-23T02:00:00.000Z	56 \| moderate	11.68 \| good	51.528 \| good	25.995 \| good	2.443 \| good	33.546 \| good	0.385 \| good
2026-10-23T03:00:00.000Z	58 \| moderate	12.924 \| fine	57.482 \| fine	23.77 \| good	2.426 \| good	32.069 \| good	0.384 \| good
2026-10-23T04:00:00.000Z	58 \| moderate	13.291 \| fine	59.399 \| fine	19.817 \| good	2.391 \| good	30.136 \| good	0.382 \| good
2026-10-23T05:00:00.000Z	60 \| moderate	14.161 \| fine	63.302 \| fine	14.968 \| good	2.284 \| good	27.899 \| good	0.379 \| good
2026-10-23T06:00:00.000Z	60 \| moderate	14.129 \| fine	63.246 \| fine	11.486 \| good	2.176 \| good	25.331 \| good	0.371 \| good
2026-10-23T07:00:00.000Z	60 \| moderate	14.12 \| fine	63.218 \| fine	9.936 \| good	2.073 \| good	22.872 \| good	0.359 \| good
2026-10-23T08:00:00.000Z	60 \| moderate	13.612 \| fine	61.382 \| fine	10.029 \| good	1.977 \| good	20.888 \| good	0.349 \| good
2026-10-23T09:00:00.000Z	58 \| moderate	12.621 \| fine	57.332 \| fine	10.767 \| good	1.88 \| good	19.474 \| good	0.34 \| good
2026-10-23T10:00:00.000Z	56 \| moderate	12.491 \| fine	56.969 \| fine	12.202 \| good	1.806 \| good	18.439 \| good	0.332 \| good
2026-10-23T11:00:00.000Z	58 \| moderate	12.68 \| fine	57.221 \| fine	12.085 \| good	1.771 \| good	18.149 \| good	0.326 \| good
2026-10-23T12:00:00.000Z	58 \| moderate	12.605 \| fine	57.202 \| fine	10.764 \| good	1.796 \| good	19.697 \| good	0.332 \| good
2026-10-23T13:00:00.000Z	60 \| moderate	13.891 \| fine	62.904 \| fine	12.197 \| good	1.816 \| good	18.426 \| good	0.351 \| good
2026-10-23T14:00:00.000Z	64 \| moderate	15.779 \| fine	70.602 \| fine	19.702 \| good	1.691 \| good	14.294 \| good	0.342 \| good
2026-10-23T15:00:00.000Z	64 \| moderate	15.768 \| fine	70.614 \| fine	29.594 \| good	1.952 \| good	12.357 \| good	0.318 \| good
2026-10-23T16:00:00.000Z	60 \| moderate	14.447 \| fine	64.667 \| fine	39.896 \| good	2.494 \| good	9.924 \| good	0.265 \| good
2026-10-23T17:00:00.000Z	60 \| moderate	13.502 \| fine	60.989 \| fine	46.986 \| good	2.789 \| good	6.982 \| good	0.219 \| good
2026-10-23T18:00:00.000Z	56 \| moderate	12.337 \| fine	55.241 \| fine	52.155 \| good	2.171 \| good	4.14 \| good	0.193 \| good
2026-10-23T19:00:00.000Z	54 \| moderate	10.762 \| good	47.919 \| good	55.044 \| fine	1.916 \| good	3.077 \| good	0.186 \| good
2026-10-23T20:00:00.000Z	54 \| moderate	10.12 \| good	44.959 \| good	56.054 \| fine	1.835 \| good	2.829 \| good	0.184 \| good
2026-10-23T21:00:00.000Z	52 \| moderate	9.719 \| good	43.075 \| good	53.257 \| good	1.811 \| good	3.024 \| good	0.184 \| good
2026-10-23T22:00:00.000Z	52 \| moderate	9.66 \| good	43.072 \| good	49.28 \| good	1.732 \| good	5.733 \| good	0.202 \| good
2026-10-23T23:00:00.000Z	54 \| moderate	11.393 \| good	50.306 \| good	42.316 \| good	1.667 \| good	11.635 \| good	0.242 \| good
2026-10-24T00:00:00.000Z	56 \| moderate	12.47 \| fine	56.802 \| fine	33.908 \| good	1.613 \| good	14.401 \| good	0.259 \| good
2026-10-24T01:00:00.000Z	56 \| moderate	12.497 \| fine	56.835 \| fine	29.476 \| good	1.608 \| good	13.771 \| good	0.25 \| good
2026-10-24T02:00:00.000Z	56 \| moderate	11.537 \| good	51.339 \| good	29.496 \| good	1.558 \| good	12.671 \| good	0.242 \| good
2026-10-24T03:00:00.000Z	54 \| moderate	10.963 \| good	48.258 \| good	26.801 \| good	1.484 \| good	11.381 \| good	0.236 \| good
2026-10-24T04:00:00.000Z	54 \| moderate	11.184 \| good	49.345 \| good	22.998 \| good	1.404 \| good	9.891 \| good	0.232 \| good
2026-10-24T05:00:00.000Z	56 \| moderate	12.11 \| fine	54.162 \| good	19.253 \| good	1.332 \| good	8.175 \| good	0.229 \| good
2026-10-24T06:00:00.000Z	60 \| moderate	13.592 \| fine	61.02 \| fine	15.673 \| good	1.304 \| good	7.024 \| good	0.227 \| good
2026-10-24T07:00:00.000Z	62 \| moderate	14.897 \| fine	66.9 \| fine	14.025 \| good	1.301 \| good	6.484 \| good	0.226 \| good
2026-10-24T08:00:00.000Z	64 \| moderate	15.754 \| fine	70.829 \| fine	12.038 \| good	1.318 \| good	6.358 \| good	0.227 \| good
2026-10-24T09:00:00.000Z	66 \| moderate	16.743 \| fine	74.829 \| fine	12.951 \| good	1.335 \| good	6.495 \| good	0.228 \| good
2026-10-24T10:00:00.000Z	66 \| moderate	16.779 \| fine	74.683 \| fine	14.174 \| good	1.359 \| good	6.83 \| good	0.229 \| good
2026-10-24T11:00:00.000Z	67 \| moderate	17.735 \| fine	78.683 \| fine	14.908 \| good	1.375 \| good	7.472 \| good	0.232 \| good
2026-10-24T12:00:00.000Z	69 \| moderate	18.52 \| fine	81.127 \| fine	16.951 \| good	1.355 \| good	9.323 \| good	0.24 \| good
2026-10-24T13:00:00.000Z	69 \| moderate	19.404 \| fine	85.152 \| fine	18.422 \| good	1.353 \| good	10.128 \| good	0.253 \| good
2026-10-24T14:00:00.000Z	69 \| moderate	19.098 \| fine	84.635 \| fine	22.48 \| good	1.429 \| good	8.555 \| good	0.259 \| good
2026-10-24T15:00:00.000Z	66 \| moderate	17.033 \| fine	75.383 \| fine	29.597 \| good	1.658 \| good	7.467 \| good	0.251 \| good
2026-10-24T16:00:00.000Z	62 \| moderate	14.714 \| fine	65.432 \| fine	38.442 \| good	1.9 \| good	6.822 \| good	0.241 \| good
2026-10-24T17:00:00.000Z	58 \| moderate	13.155 \| fine	59.21 \| fine	47.116 \| good	2.119 \| good	5.996 \| good	0.225 \| good
2026-10-24T18:00:00.000Z	56 \| moderate	12.492 \| fine	56.758 \| fine	50.7 \| good	2.069 \| good	4.726 \| good	0.212 \| good
2026-10-24T19:00:00.000Z	54 \| moderate	11.37 \| good	50.282 \| good	52.947 \| good	1.922 \| good	3.77 \| good	0.202 \| good

Merrillville

Empower business decisions with accurate air quality data

Merrillville, Indiana air quality map: Real-time AQI near you

0.24ppm

How accurate is Indiana, USA air quality data?

Air quality measurements for Indiana, 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 Merrillville, Indiana updated?

Air quality data for Merrillville, Indiana is updated on an hourly basis.

When did Merrillville, Indiana experience the worst air quality in the last 24 hours?

The worst air quality in Merrillville, Indiana was recorded at 01:00:00 on 2026-10-22.

When did Merrillville, Indiana have its best air quality in the last 24 hours?

The best air quality in Merrillville, Indiana was recorded at 08:00:00 on 2026-10-21.

What is the real-time air quality index for Merrillville, Indiana?

The real-time air quality index in Merrillville, Indiana is 69, currently categorized as Moderate.

Which pollutant is found most often in Merrillville, Indiana?

The most common pollutant in Merrillville, Indiana is PM2.5.

What can I do if the air quality in Merrillville, Indiana is poor?

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

What are the current PM_2.5 levels in Merrillville, Indiana?

The measured PM_2.5 levels in Merrillville, Indiana at present are 19.226 μg/m³.

What are the current PM₁₀ levels at Merrillville, Indiana?

The current PM₁₀ levels in Merrillville, Indiana are 89.063 μg/m³.

What are the current carbon monoxide (CO) levels at Merrillville, Indiana?

The current carbon monoxide (CO) level in Merrillville, Indiana is 0.203 ppm.

What are the current sulfur dioxide (SO₂) levels at Merrillville, Indiana?

The current sulfur dioxide (SO₂) levels in Merrillville, Indiana are 2.06 ppb.

What are the current ozone (O₃) levels at Merrillville, Indiana?

The current ozone (O₃) levels at Merrillville, Indiana is 28.146 ppm.

What are the current nitrogen dioxide (NO₂) levels at Merrillville, Indiana?

The current nitrogen dioxide (NO₂) levels at Merrillville, Indiana is 15.229 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T20:00:00.000Z	39 \| good	6.55 \| good	20.12 \| good	42.308 \| good	2.66 \| good	6.838 \| good	0.201 \| good
2026-10-20T21:00:00.000Z	43 \| good	5.063 \| good	20.342 \| good	45.989 \| good	3.567 \| good	4.321 \| good	0.187 \| good
2026-10-20T22:00:00.000Z	41 \| good	5.602 \| good	19.193 \| good	44.172 \| good	4.526 \| good	3.341 \| good	0.187 \| good
2026-10-20T23:00:00.000Z	45 \| good	5.362 \| good	17.91 \| good	48.505 \| good	2.142 \| good	6.261 \| good	0.205 \| good
2026-10-21T00:00:00.000Z	41 \| good	3.612 \| good	27.781 \| good	44.171 \| good	0.753 \| good	5.882 \| good	0.238 \| good
2026-10-21T01:00:00.000Z	41 \| good	5.845 \| good	19.84 \| good	44.089 \| good	0.608 \| good	9.568 \| good	0.256 \| good
2026-10-21T02:00:00.000Z	38 \| good	7.424 \| good	21.688 \| good	40.028 \| good	0.606 \| good	18.198 \| good	0.274 \| good
2026-10-21T03:00:00.000Z	33 \| good	5.695 \| good	24.374 \| good	20.197 \| good	1.986 \| good	19.926 \| good	0.276 \| good
2026-10-21T04:00:00.000Z	49 \| good	8.753 \| good	27.228 \| good	25.134 \| good	0.682 \| good	28.985 \| good	0.289 \| good
2026-10-21T05:00:00.000Z	49 \| good	9.098 \| good	31.84 \| good	24.855 \| good	1.663 \| good	31.914 \| good	0.263 \| good
2026-10-21T06:00:00.000Z	66 \| moderate	16.886 \| fine	31.304 \| good	19.452 \| good	2.004 \| good	32.949 \| good	0.263 \| good
2026-10-21T07:00:00.000Z	64 \| moderate	16.018 \| fine	37.448 \| good	13.639 \| good	1.512 \| good	25.517 \| good	0.282 \| good
2026-10-21T08:00:00.000Z	66 \| moderate	17.402 \| fine	68.655 \| fine	20.164 \| good	0.819 \| good	21.494 \| good	0.256 \| good
2026-10-21T09:00:00.000Z	73 \| moderate	21.03 \| fine	87.947 \| fine	9.827 \| good	0.719 \| good	18.882 \| good	0.238 \| good
2026-10-21T10:00:00.000Z	75 \| moderate	22.243 \| fine	68.094 \| fine	14.181 \| good	0.71 \| good	17.127 \| good	0.282 \| good
2026-10-21T11:00:00.000Z	62 \| moderate	14.995 \| fine	50.122 \| good	12.511 \| good	0.723 \| good	19.373 \| good	0.333 \| good
2026-10-21T12:00:00.000Z	71 \| moderate	20.364 \| fine	95.562 \| fine	12.016 \| good	0.771 \| good	21.864 \| good	0.347 \| good
2026-10-21T13:00:00.000Z	64 \| moderate	15.68 \| fine	81.684 \| fine	14.047 \| good	0.759 \| good	21.106 \| good	0.347 \| good
2026-10-21T14:00:00.000Z	66 \| moderate	16.566 \| fine	57.411 \| fine	9.059 \| good	0.929 \| good	19.624 \| good	0.465 \| good
2026-10-21T15:00:00.000Z	77 \| moderate	22.514 \| fine	99.383 \| fine	17.165 \| good	1.616 \| good	18.698 \| good	0.369 \| good
2026-10-21T16:00:00.000Z	77 \| moderate	23.298 \| fine	92.635 \| fine	14.778 \| good	2.15 \| good	17.131 \| good	0.289 \| good
2026-10-21T17:00:00.000Z	67 \| moderate	18.356 \| fine	63.151 \| fine	22.923 \| good	2.17 \| good	18.702 \| good	0.226 \| good
2026-10-21T18:00:00.000Z	58 \| moderate	13.117 \| fine	37.796 \| good	31.738 \| good	2.749 \| good	13.681 \| good	0.226 \| good
2026-10-21T19:00:00.000Z	60 \| moderate	13.769 \| fine	47.978 \| good	42.873 \| good	1.49 \| good	5.376 \| good	0.226 \| good
2026-10-21T20:00:00.000Z	45 \| good	8.326 \| good	39.86 \| good	48.64 \| good	1.516 \| good	6.157 \| good	0.226 \| good
2026-10-21T21:00:00.000Z	48 \| good	7.924 \| good	29.457 \| good	52.139 \| good	1.646 \| good	6.569 \| good	0.226 \| good
2026-10-21T22:00:00.000Z	46 \| good	5.487 \| good	34.492 \| good	50.117 \| good	2.025 \| good	3.628 \| good	0.226 \| good
2026-10-21T23:00:00.000Z	49 \| good	8.634 \| good	23.301 \| good	45.775 \| good	2.453 \| good	12.11 \| good	0.245 \| good
2026-10-22T00:00:00.000Z	46 \| good	6.552 \| good	22.474 \| good	50.334 \| good	1.636 \| good	20.6 \| good	0.289 \| good
2026-10-22T01:00:00.000Z	56 \| moderate	12.054 \| good	41.815 \| good	39.166 \| good	1.136 \| good	28.776 \| good	0.307 \| good
2026-10-22T02:00:00.000Z	58 \| moderate	12.531 \| fine	55.339 \| fine	35.686 \| good	0.927 \| good	30.304 \| good	0.333 \| good
2026-10-22T03:00:00.000Z	56 \| moderate	11.706 \| good	51.796 \| good	13.974 \| good	3.061 \| good	35.254 \| good	0.458 \| good
2026-10-22T04:00:00.000Z	60 \| moderate	14.261 \| fine	27.186 \| good	12.976 \| good	1.664 \| good	26.855 \| good	0.377 \| good
2026-10-22T05:00:00.000Z	69 \| moderate	18.871 \| fine	64.294 \| fine	4.38 \| good	1.401 \| good	22.637 \| good	0.333 \| good
2026-10-22T06:00:00.000Z	67 \| moderate	18.295 \| fine	67.745 \| fine	1.172 \| good	1.38 \| good	20.877 \| good	0.41 \| good
2026-10-22T07:00:00.000Z	67 \| moderate	17.603 \| fine	60.786 \| fine	2.429 \| good	1.433 \| good	21.766 \| good	0.41 \| good
2026-10-22T08:00:00.000Z	71 \| moderate	18.099 \| fine	94.963 \| fine	3.217 \| good	1.396 \| good	21.829 \| good	0.268 \| good
2026-10-22T09:00:00.000Z	70 \| moderate	15.792 \| fine	92.587 \| fine	1.301 \| good	1.587 \| good	18.263 \| good	0.249 \| good
2026-10-22T10:00:00.000Z	56 \| moderate	11.657 \| good	47.899 \| good	5.617 \| good	1.43 \| good	15.871 \| good	0.263 \| good
2026-10-22T11:00:00.000Z	56 \| moderate	11.841 \| good	41.976 \| good	6.724 \| good	1.448 \| good	18.489 \| good	0.408 \| good
2026-10-22T12:00:00.000Z	58 \| moderate	12.968 \| fine	57.203 \| fine	3.916 \| good	1.475 \| good	19.425 \| good	0.476 \| good
2026-10-22T13:00:00.000Z	76 \| moderate	15.786 \| fine	105.841 \| fine	3.746 \| good	1.705 \| good	20.081 \| good	0.388 \| good
2026-10-22T14:00:00.000Z	66 \| moderate	17.051 \| fine	69.973 \| fine	5.007 \| good	1.787 \| good	26.951 \| good	0.413 \| good
2026-10-22T15:00:00.000Z	62 \| moderate	15.386 \| fine	61.176 \| fine	6.113 \| good	1.695 \| good	18.443 \| good	0.491 \| good
2026-10-22T16:00:00.000Z	67 \| moderate	17.901 \| fine	74.486 \| fine	10.108 \| good	2.361 \| good	19.797 \| good	0.311 \| good
2026-10-22T17:00:00.000Z	73 \| moderate	21.344 \| fine	90.449 \| fine	15.053 \| good	2.495 \| good	20.026 \| good	0.263 \| good
2026-10-22T18:00:00.000Z	73 \| moderate	20.799 \| fine	84.988 \| fine	20.843 \| good	1.779 \| good	14.513 \| good	0.238 \| good
2026-10-22T19:00:00.000Z	67 \| moderate	18.46 \| fine	70.26 \| fine	28.599 \| good	1.788 \| good	9.743 \| good	0.201 \| good
2026-10-22T19:00:00.000Z	69 \| moderate	19.226 \| fine	89.063 \| fine	28.146 \| good	2.06 \| good	15.229 \| good	0.203 \| good
2026-10-22T20:00:00.000Z	66 \| moderate	16.641 \| fine	73.447 \| fine	46.965 \| good	3.366 \| good	9.375 \| good	0.211 \| good
2026-10-22T21:00:00.000Z	66 \| moderate	17.304 \| fine	77.178 \| fine	46.57 \| good	3.15 \| good	9.395 \| good	0.209 \| good
2026-10-22T22:00:00.000Z	67 \| moderate	17.984 \| fine	79.718 \| fine	42.246 \| good	2.913 \| good	13.465 \| good	0.234 \| good
2026-10-22T23:00:00.000Z	69 \| moderate	19.179 \| fine	85.244 \| fine	35.37 \| good	2.889 \| good	23.463 \| good	0.296 \| good
2026-10-23T00:00:00.000Z	62 \| moderate	15.158 \| fine	67.364 \| fine	29.35 \| good	2.69 \| good	30.346 \| good	0.352 \| good
2026-10-23T01:00:00.000Z	58 \| moderate	12.582 \| fine	56.926 \| fine	28.234 \| good	2.534 \| good	33.211 \| good	0.377 \| good
2026-10-23T02:00:00.000Z	56 \| moderate	11.68 \| good	51.528 \| good	25.995 \| good	2.443 \| good	33.546 \| good	0.385 \| good
2026-10-23T03:00:00.000Z	58 \| moderate	12.924 \| fine	57.482 \| fine	23.77 \| good	2.426 \| good	32.069 \| good	0.384 \| good
2026-10-23T04:00:00.000Z	58 \| moderate	13.291 \| fine	59.399 \| fine	19.817 \| good	2.391 \| good	30.136 \| good	0.382 \| good
2026-10-23T05:00:00.000Z	60 \| moderate	14.161 \| fine	63.302 \| fine	14.968 \| good	2.284 \| good	27.899 \| good	0.379 \| good
2026-10-23T06:00:00.000Z	60 \| moderate	14.129 \| fine	63.246 \| fine	11.486 \| good	2.176 \| good	25.331 \| good	0.371 \| good
2026-10-23T07:00:00.000Z	60 \| moderate	14.12 \| fine	63.218 \| fine	9.936 \| good	2.073 \| good	22.872 \| good	0.359 \| good
2026-10-23T08:00:00.000Z	60 \| moderate	13.612 \| fine	61.382 \| fine	10.029 \| good	1.977 \| good	20.888 \| good	0.349 \| good
2026-10-23T09:00:00.000Z	58 \| moderate	12.621 \| fine	57.332 \| fine	10.767 \| good	1.88 \| good	19.474 \| good	0.34 \| good
2026-10-23T10:00:00.000Z	56 \| moderate	12.491 \| fine	56.969 \| fine	12.202 \| good	1.806 \| good	18.439 \| good	0.332 \| good
2026-10-23T11:00:00.000Z	58 \| moderate	12.68 \| fine	57.221 \| fine	12.085 \| good	1.771 \| good	18.149 \| good	0.326 \| good
2026-10-23T12:00:00.000Z	58 \| moderate	12.605 \| fine	57.202 \| fine	10.764 \| good	1.796 \| good	19.697 \| good	0.332 \| good
2026-10-23T13:00:00.000Z	60 \| moderate	13.891 \| fine	62.904 \| fine	12.197 \| good	1.816 \| good	18.426 \| good	0.351 \| good
2026-10-23T14:00:00.000Z	64 \| moderate	15.779 \| fine	70.602 \| fine	19.702 \| good	1.691 \| good	14.294 \| good	0.342 \| good
2026-10-23T15:00:00.000Z	64 \| moderate	15.768 \| fine	70.614 \| fine	29.594 \| good	1.952 \| good	12.357 \| good	0.318 \| good
2026-10-23T16:00:00.000Z	60 \| moderate	14.447 \| fine	64.667 \| fine	39.896 \| good	2.494 \| good	9.924 \| good	0.265 \| good
2026-10-23T17:00:00.000Z	60 \| moderate	13.502 \| fine	60.989 \| fine	46.986 \| good	2.789 \| good	6.982 \| good	0.219 \| good
2026-10-23T18:00:00.000Z	56 \| moderate	12.337 \| fine	55.241 \| fine	52.155 \| good	2.171 \| good	4.14 \| good	0.193 \| good
2026-10-23T19:00:00.000Z	54 \| moderate	10.762 \| good	47.919 \| good	55.044 \| fine	1.916 \| good	3.077 \| good	0.186 \| good
2026-10-23T20:00:00.000Z	54 \| moderate	10.12 \| good	44.959 \| good	56.054 \| fine	1.835 \| good	2.829 \| good	0.184 \| good
2026-10-23T21:00:00.000Z	52 \| moderate	9.719 \| good	43.075 \| good	53.257 \| good	1.811 \| good	3.024 \| good	0.184 \| good
2026-10-23T22:00:00.000Z	52 \| moderate	9.66 \| good	43.072 \| good	49.28 \| good	1.732 \| good	5.733 \| good	0.202 \| good
2026-10-23T23:00:00.000Z	54 \| moderate	11.393 \| good	50.306 \| good	42.316 \| good	1.667 \| good	11.635 \| good	0.242 \| good
2026-10-24T00:00:00.000Z	56 \| moderate	12.47 \| fine	56.802 \| fine	33.908 \| good	1.613 \| good	14.401 \| good	0.259 \| good
2026-10-24T01:00:00.000Z	56 \| moderate	12.497 \| fine	56.835 \| fine	29.476 \| good	1.608 \| good	13.771 \| good	0.25 \| good
2026-10-24T02:00:00.000Z	56 \| moderate	11.537 \| good	51.339 \| good	29.496 \| good	1.558 \| good	12.671 \| good	0.242 \| good
2026-10-24T03:00:00.000Z	54 \| moderate	10.963 \| good	48.258 \| good	26.801 \| good	1.484 \| good	11.381 \| good	0.236 \| good
2026-10-24T04:00:00.000Z	54 \| moderate	11.184 \| good	49.345 \| good	22.998 \| good	1.404 \| good	9.891 \| good	0.232 \| good
2026-10-24T05:00:00.000Z	56 \| moderate	12.11 \| fine	54.162 \| good	19.253 \| good	1.332 \| good	8.175 \| good	0.229 \| good
2026-10-24T06:00:00.000Z	60 \| moderate	13.592 \| fine	61.02 \| fine	15.673 \| good	1.304 \| good	7.024 \| good	0.227 \| good
2026-10-24T07:00:00.000Z	62 \| moderate	14.897 \| fine	66.9 \| fine	14.025 \| good	1.301 \| good	6.484 \| good	0.226 \| good
2026-10-24T08:00:00.000Z	64 \| moderate	15.754 \| fine	70.829 \| fine	12.038 \| good	1.318 \| good	6.358 \| good	0.227 \| good
2026-10-24T09:00:00.000Z	66 \| moderate	16.743 \| fine	74.829 \| fine	12.951 \| good	1.335 \| good	6.495 \| good	0.228 \| good
2026-10-24T10:00:00.000Z	66 \| moderate	16.779 \| fine	74.683 \| fine	14.174 \| good	1.359 \| good	6.83 \| good	0.229 \| good
2026-10-24T11:00:00.000Z	67 \| moderate	17.735 \| fine	78.683 \| fine	14.908 \| good	1.375 \| good	7.472 \| good	0.232 \| good
2026-10-24T12:00:00.000Z	69 \| moderate	18.52 \| fine	81.127 \| fine	16.951 \| good	1.355 \| good	9.323 \| good	0.24 \| good
2026-10-24T13:00:00.000Z	69 \| moderate	19.404 \| fine	85.152 \| fine	18.422 \| good	1.353 \| good	10.128 \| good	0.253 \| good
2026-10-24T14:00:00.000Z	69 \| moderate	19.098 \| fine	84.635 \| fine	22.48 \| good	1.429 \| good	8.555 \| good	0.259 \| good
2026-10-24T15:00:00.000Z	66 \| moderate	17.033 \| fine	75.383 \| fine	29.597 \| good	1.658 \| good	7.467 \| good	0.251 \| good
2026-10-24T16:00:00.000Z	62 \| moderate	14.714 \| fine	65.432 \| fine	38.442 \| good	1.9 \| good	6.822 \| good	0.241 \| good
2026-10-24T17:00:00.000Z	58 \| moderate	13.155 \| fine	59.21 \| fine	47.116 \| good	2.119 \| good	5.996 \| good	0.225 \| good
2026-10-24T18:00:00.000Z	56 \| moderate	12.492 \| fine	56.758 \| fine	50.7 \| good	2.069 \| good	4.726 \| good	0.212 \| good
2026-10-24T19:00:00.000Z	54 \| moderate	11.37 \| good	50.282 \| good	52.947 \| good	1.922 \| good	3.77 \| good	0.202 \| good

Real-time air quality index in Merrillville, Indiana today

Common air pollutants in Merrillville, Indiana

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Merrillville, Indiana air quality forecast and history

Empower business decisions with accurate air quality data

Merrillville, Indiana air quality map: Real-time AQI near you

Air quality in nearby cities

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Hobart, Indiana

Griffith, Indiana

Schererville, Indiana

St. John, Indiana

Highland Town, Indiana

How accurate is Indiana, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently is the air quality data for Merrillville, Indiana updated?

When did Merrillville, Indiana experience the worst air quality in the last 24 hours?

When did Merrillville, Indiana have its best air quality in the last 24 hours?

What is the real-time air quality index for Merrillville, Indiana?

Which pollutant is found most often in Merrillville, Indiana?

What can I do if the air quality in Merrillville, Indiana is poor?

What are the current PM2.5 levels in Merrillville, Indiana?

What are the current PM10 levels at Merrillville, Indiana?

What are the current carbon monoxide (CO) levels at Merrillville, Indiana?

What are the current sulfur dioxide (SO2) levels at Merrillville, Indiana?

What are the current ozone (O3) levels at Merrillville, Indiana?

What are the current nitrogen dioxide (NO2) levels at Merrillville, Indiana?

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 Merrillville, Indiana?

What are the current PM₁₀ levels at Merrillville, Indiana?

What are the current sulfur dioxide (SO₂) levels at Merrillville, Indiana?

What are the current ozone (O₃) levels at Merrillville, Indiana?

What are the current nitrogen dioxide (NO₂) levels at Merrillville, Indiana?