What is the current level of PM10 in Signal Hill, California?

Signal Hill, California currently has a PM10 concentration of 7.927 μg/m3.

What is the current level of sulfur dioxide (SO2) in Signal Hill, California?

The current sulfur dioxide (SO2) concentration in Signal Hill, California is 0.3 ppb.

What is the current level of ozone (O3) in Signal Hill, California?

Signal Hill, California currently has an ozone (O3) concentration of 40.986 ppm.

What is the current level of nitrogen dioxide (NO2) in Signal Hill, California?

The current level of nitrogen dioxide (NO2) in Signal Hill, California is 2.14 ppb.

Current air quality index in Signal Hill, California today

Q: What is the PM2.5 concentration in Signal Hill, California right now?

Signal Hill, California currently has a PM2.5 concentration of 2.471 μg/m3.

Stay updated with real-time air quality in Signal Hill, California 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

Signal Hill, California

Last updated: ... (Local time)

Common air pollutants in Signal Hill, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

2.47 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

7.93 μg/m³

155

255

425

605+

Ozone (O₃)

40.99 ppb

201

201+

Sulfur Dioxide (SO₂)

0.30 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.14 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.18 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

Signal Hill, California

Get Live Pollen Counts

Signal Hill, California

Scroll To Air Quality Map

Track live Signal Hill, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-21T00:00:00.000Z	44 \| good	8.056 \| good	34.845 \| good	41.259 \| good	0.376 \| good	5.033 \| good	0.235 \| good
2026-10-21T01:00:00.000Z	38 \| good	7.14 \| good	34.214 \| good	39.972 \| good	0.381 \| good	6.248 \| good	0.312 \| good
2026-10-21T02:00:00.000Z	38 \| good	6.625 \| good	30.466 \| good	36.433 \| good	0.384 \| good	7.01 \| good	0.288 \| good
2026-10-21T03:00:00.000Z	25 \| good	4.348 \| good	18.612 \| good	26.655 \| good	0.803 \| good	7.842 \| good	0.141 \| good
2026-10-21T04:00:00.000Z	29 \| good	5.056 \| good	22.323 \| good	30.81 \| good	0.381 \| good	8.859 \| good	0.217 \| good
2026-10-21T05:00:00.000Z	29 \| good	4.485 \| good	22.613 \| good	31.021 \| good	0.699 \| good	9.421 \| good	0.223 \| good
2026-10-21T06:00:00.000Z	27 \| good	4.808 \| good	22.701 \| good	28.313 \| good	0.323 \| good	10.6 \| good	0.209 \| good
2026-10-21T07:00:00.000Z	27 \| good	4.656 \| good	22.597 \| good	27.407 \| good	0.323 \| good	10.6 \| good	0.209 \| good
2026-10-21T08:00:00.000Z	27 \| good	5.465 \| good	20.91 \| good	25.685 \| good	0.319 \| good	10.911 \| good	0.235 \| good
2026-10-21T09:00:00.000Z	33 \| good	5.83 \| good	21.95 \| good	21.404 \| good	0.419 \| good	12.538 \| good	0.196 \| good
2026-10-21T10:00:00.000Z	27 \| good	5.409 \| good	20.708 \| good	17.468 \| good	0.391 \| good	14.473 \| good	0.253 \| good
2026-10-21T11:00:00.000Z	27 \| good	5.134 \| good	21.633 \| good	15.559 \| good	0.396 \| good	17.747 \| good	0.309 \| good
2026-10-21T12:00:00.000Z	27 \| good	4.734 \| good	19.54 \| good	12.764 \| good	0.414 \| good	18.082 \| good	0.314 \| good
2026-10-21T13:00:00.000Z	27 \| good	4.829 \| good	20.273 \| good	13.449 \| good	0.414 \| good	18.082 \| good	0.314 \| good
2026-10-21T14:00:00.000Z	33 \| good	6.406 \| good	27.695 \| good	10.38 \| good	0.416 \| good	22 \| good	0.528 \| good
2026-10-21T15:00:00.000Z	49 \| good	8.521 \| good	38.368 \| good	10.751 \| good	0.517 \| good	23.787 \| good	0.61 \| good
2026-10-21T16:00:00.000Z	54 \| moderate	10.59 \| good	44.984 \| good	13.715 \| good	0.635 \| good	22.763 \| good	0.567 \| good
2026-10-21T17:00:00.000Z	54 \| moderate	10.659 \| good	40.27 \| good	20.662 \| good	0.633 \| good	14.812 \| good	0.372 \| good
2026-10-21T18:00:00.000Z	49 \| good	9.171 \| good	37.296 \| good	24.603 \| good	0.478 \| good	9.3 \| good	0.299 \| good
2026-10-21T19:00:00.000Z	44 \| good	7.536 \| good	31.178 \| good	26.688 \| good	0.621 \| good	9.421 \| good	0.297 \| good
2026-10-21T20:00:00.000Z	38 \| good	6.811 \| good	31.27 \| good	28.947 \| good	0.539 \| good	9.217 \| good	0.279 \| good
2026-10-21T21:00:00.000Z	33 \| good	6.499 \| good	29.707 \| good	30.295 \| good	0.57 \| good	10.096 \| good	0.291 \| good
2026-10-21T22:00:00.000Z	29 \| good	5.164 \| good	31.269 \| good	30.313 \| good	0.486 \| good	12.347 \| good	0.273 \| good
2026-10-21T23:00:00.000Z	26 \| good	3.34 \| good	21.482 \| good	28.067 \| good	0.407 \| good	15.025 \| good	0.336 \| good
2026-10-22T00:00:00.000Z	24 \| good	4.271 \| good	21.024 \| good	26.267 \| good	0.414 \| good	19.478 \| good	0.416 \| good
2026-10-22T01:00:00.000Z	33 \| good	6.289 \| good	22.186 \| good	22.561 \| good	0.399 \| good	21.69 \| good	0.468 \| good
2026-10-22T02:00:00.000Z	38 \| good	6.778 \| good	24.788 \| good	24.862 \| good	0.409 \| good	17.731 \| good	0.424 \| good
2026-10-22T03:00:00.000Z	36 \| good	3.811 \| good	16.758 \| good	39.278 \| good	0.412 \| good	10.354 \| good	0.125 \| good
2026-10-22T04:00:00.000Z	38 \| good	6.55 \| good	17.49 \| good	24.568 \| good	0.324 \| good	9.747 \| good	0.303 \| good
2026-10-22T05:00:00.000Z	23 \| good	3.971 \| good	14.105 \| good	24.815 \| good	0.611 \| good	4.116 \| good	0.253 \| good
2026-10-22T06:00:00.000Z	24 \| good	3.431 \| good	11.385 \| good	25.571 \| good	0.22 \| good	3.259 \| good	0.229 \| good
2026-10-22T07:00:00.000Z	22 \| good	3.322 \| good	12.672 \| good	24.281 \| good	0.22 \| good	3.259 \| good	0.229 \| good
2026-10-22T08:00:00.000Z	24 \| good	2.853 \| good	9.633 \| good	25.988 \| good	0.297 \| good	5.055 \| good	0.171 \| good
2026-10-22T09:00:00.000Z	23 \| good	1.712 \| good	8.231 \| good	25.058 \| good	0.39 \| good	4.886 \| good	0.153 \| good
2026-10-22T10:00:00.000Z	22 \| good	1.517 \| good	7.68 \| good	23.905 \| good	0.297 \| good	8.048 \| good	0.153 \| good
2026-10-22T11:00:00.000Z	20 \| good	1.59 \| good	9.015 \| good	21.984 \| good	0.378 \| good	11.698 \| good	0.271 \| good
2026-10-22T12:00:00.000Z	19 \| good	2.597 \| good	8.697 \| good	20.795 \| good	0.297 \| good	11.552 \| good	0.303 \| good
2026-10-22T13:00:00.000Z	19 \| good	2.685 \| good	9.758 \| good	20.281 \| good	0.297 \| good	11.552 \| good	0.303 \| good
2026-10-22T14:00:00.000Z	18 \| good	2.255 \| good	8.318 \| good	17.709 \| good	0.297 \| good	18.658 \| good	0.532 \| good
2026-10-22T15:00:00.000Z	21 \| good	3.023 \| good	10.132 \| good	16.789 \| good	0.224 \| good	21.656 \| good	0.708 \| good
2026-10-22T16:00:00.000Z	18 \| good	3.246 \| good	15.977 \| good	18.804 \| good	0.377 \| good	18.124 \| good	0.664 \| good
2026-10-22T17:00:00.000Z	24 \| good	3.249 \| good	14.829 \| good	25.782 \| good	0.358 \| good	9.678 \| good	0.348 \| good
2026-10-22T18:00:00.000Z	28 \| good	2.794 \| good	11.169 \| good	29.627 \| good	0.284 \| good	6.226 \| good	0.26 \| good
2026-10-22T19:00:00.000Z	31 \| good	2.535 \| good	8.346 \| good	34.157 \| good	0.263 \| good	5.225 \| good	0.21 \| good
2026-10-22T20:00:00.000Z	34 \| good	2.093 \| good	9.293 \| good	37.217 \| good	0.273 \| good	5.756 \| good	0.197 \| good
2026-10-22T21:00:00.000Z	37 \| good	1.999 \| good	10.047 \| good	39.782 \| good	0.268 \| good	5.15 \| good	0.201 \| good
2026-10-22T22:00:00.000Z	38 \| good	1.638 \| good	7.898 \| good	40.853 \| good	0.299 \| good	5.907 \| good	0.208 \| good
2026-10-22T23:00:00.000Z	38 \| good	2.471 \| good	7.927 \| good	40.986 \| good	0.3 \| good	2.14 \| good	0.182 \| good
2026-10-23T00:00:00.000Z	33 \| good	2.114 \| good	8.635 \| good	35.952 \| good	0.813 \| good	3.386 \| good	0.142 \| good
2026-10-23T01:00:00.000Z	29 \| good	2.499 \| good	10.056 \| good	31.18 \| good	0.874 \| good	5.074 \| good	0.146 \| good
2026-10-23T02:00:00.000Z	27 \| good	1.84 \| good	7.775 \| good	28.833 \| good	0.949 \| good	10.439 \| good	0.163 \| good
2026-10-23T03:00:00.000Z	28 \| good	2.194 \| good	8.976 \| good	30.093 \| good	1.072 \| good	16.331 \| good	0.18 \| good
2026-10-23T04:00:00.000Z	27 \| good	1.798 \| good	7.602 \| good	28.542 \| good	1.209 \| good	21.271 \| good	0.194 \| good
2026-10-23T05:00:00.000Z	25 \| good	2.357 \| good	9.904 \| good	27.402 \| good	1.335 \| good	23.042 \| good	0.207 \| good
2026-10-23T06:00:00.000Z	24 \| good	3.107 \| good	13.522 \| good	25.701 \| good	1.358 \| good	23.113 \| good	0.209 \| good
2026-10-23T07:00:00.000Z	23 \| good	3.758 \| good	16.563 \| good	24.886 \| good	1.306 \| good	21.478 \| good	0.201 \| good
2026-10-23T08:00:00.000Z	27 \| good	5.342 \| good	23.226 \| good	25.051 \| good	1.261 \| good	17.854 \| good	0.19 \| good
2026-10-23T09:00:00.000Z	22 \| good	3.94 \| good	17.475 \| good	24.233 \| good	1.179 \| good	15.315 \| good	0.182 \| good
2026-10-23T10:00:00.000Z	22 \| good	3.751 \| good	16.35 \| good	23.573 \| good	1.086 \| good	12.565 \| good	0.173 \| good
2026-10-23T11:00:00.000Z	22 \| good	4.284 \| good	18.833 \| good	20.957 \| good	0.996 \| good	11.778 \| good	0.17 \| good
2026-10-23T12:00:00.000Z	27 \| good	5.287 \| good	23.015 \| good	9.973 \| good	0.955 \| good	11.497 \| good	0.169 \| good
2026-10-23T13:00:00.000Z	38 \| good	6.712 \| good	29.798 \| good	4.708 \| good	0.922 \| good	10.042 \| good	0.164 \| good
2026-10-23T14:00:00.000Z	52 \| moderate	9.773 \| good	43.203 \| good	2.893 \| good	0.923 \| good	11.75 \| good	0.17 \| good
2026-10-23T15:00:00.000Z	49 \| good	9.344 \| good	41.472 \| good	9.626 \| good	0.939 \| good	11.701 \| good	0.181 \| good
2026-10-23T16:00:00.000Z	33 \| good	5.653 \| good	24.374 \| good	18.887 \| good	0.925 \| good	6.126 \| good	0.152 \| good
2026-10-23T17:00:00.000Z	27 \| good	4.684 \| good	20.235 \| good	25.411 \| good	0.973 \| good	4.511 \| good	0.144 \| good
2026-10-23T18:00:00.000Z	29 \| good	4.099 \| good	18.238 \| good	31.006 \| good	1.079 \| good	4.223 \| good	0.14 \| good
2026-10-23T19:00:00.000Z	32 \| good	5.192 \| good	22.642 \| good	34.78 \| good	1.21 \| good	4.095 \| good	0.14 \| good
2026-10-23T20:00:00.000Z	36 \| good	6.388 \| good	28.479 \| good	38.989 \| good	1.297 \| good	3.679 \| good	0.138 \| good
2026-10-23T21:00:00.000Z	38 \| good	6.637 \| good	29.503 \| good	40.293 \| good	1.34 \| good	3.578 \| good	0.137 \| good
2026-10-23T22:00:00.000Z	38 \| good	6.481 \| good	28.911 \| good	41.384 \| good	1.393 \| good	3.57 \| good	0.137 \| good
2026-10-23T23:00:00.000Z	39 \| good	7.487 \| good	33.159 \| good	42.489 \| good	1.484 \| good	4.05 \| good	0.138 \| good
2026-10-24T00:00:00.000Z	44 \| good	8.216 \| good	36.477 \| good	42.813 \| good	1.56 \| good	5.006 \| good	0.141 \| good
2026-10-24T01:00:00.000Z	44 \| good	8.256 \| good	35.971 \| good	39.839 \| good	1.581 \| good	7.4 \| good	0.146 \| good
2026-10-24T02:00:00.000Z	33 \| good	5.8 \| good	25.217 \| good	35.054 \| good	1.617 \| good	13.399 \| good	0.165 \| good
2026-10-24T03:00:00.000Z	38 \| good	6.95 \| good	30.564 \| good	33.754 \| good	1.646 \| good	18.577 \| good	0.18 \| good
2026-10-24T04:00:00.000Z	44 \| good	7.745 \| good	33.8 \| good	27.032 \| good	1.698 \| good	22.725 \| good	0.193 \| good
2026-10-24T05:00:00.000Z	44 \| good	8.395 \| good	36.599 \| good	22.345 \| good	1.754 \| good	23.972 \| good	0.206 \| good
2026-10-24T06:00:00.000Z	38 \| good	7.482 \| good	32.8 \| good	18.925 \| good	1.799 \| good	24.747 \| good	0.213 \| good
2026-10-24T07:00:00.000Z	38 \| good	7.128 \| good	31.596 \| good	15.737 \| good	1.793 \| good	24.475 \| good	0.222 \| good
2026-10-24T08:00:00.000Z	49 \| good	9.431 \| good	41.775 \| good	16.206 \| good	1.7 \| good	23.598 \| good	0.223 \| good
2026-10-24T09:00:00.000Z	52 \| moderate	10.18 \| good	45.576 \| good	15.115 \| good	1.6 \| good	22.568 \| good	0.222 \| good
2026-10-24T10:00:00.000Z	56 \| moderate	12.128 \| fine	53.796 \| good	13.517 \| good	1.479 \| good	21.326 \| good	0.223 \| good
2026-10-24T11:00:00.000Z	60 \| moderate	14.055 \| fine	62.697 \| fine	12.565 \| good	1.358 \| good	20.094 \| good	0.223 \| good
2026-10-24T12:00:00.000Z	66 \| moderate	16.955 \| fine	75.381 \| fine	13.454 \| good	1.254 \| good	18.991 \| good	0.222 \| good
2026-10-24T13:00:00.000Z	71 \| moderate	20.325 \| fine	89.108 \| fine	15.895 \| good	1.173 \| good	18.068 \| good	0.222 \| good
2026-10-24T14:00:00.000Z	79 \| moderate	23.648 \| fine	103.49 \| fine	17.687 \| good	1.152 \| good	17.633 \| good	0.227 \| good
2026-10-24T15:00:00.000Z	77 \| moderate	23.035 \| fine	101.119 \| fine	16.922 \| good	1.136 \| good	15.829 \| good	0.242 \| good
2026-10-24T16:00:00.000Z	67 \| moderate	17.692 \| fine	78.661 \| fine	23.547 \| good	1.18 \| good	13.578 \| good	0.243 \| good
2026-10-24T17:00:00.000Z	60 \| moderate	13.877 \| fine	62.278 \| fine	34.29 \| good	1.441 \| good	10.925 \| good	0.191 \| good
2026-10-24T18:00:00.000Z	54 \| moderate	11.46 \| good	50.687 \| good	37.959 \| good	1.892 \| good	7.958 \| good	0.168 \| good
2026-10-24T19:00:00.000Z	54 \| moderate	11.187 \| good	49.458 \| good	42.37 \| good	1.993 \| good	6.685 \| good	0.162 \| good
2026-10-24T20:00:00.000Z	52 \| moderate	10.394 \| good	45.713 \| good	47.27 \| good	2.002 \| good	5.98 \| good	0.158 \| good
2026-10-24T21:00:00.000Z	49 \| good	8.84 \| good	39.013 \| good	50.449 \| good	2.021 \| good	5.648 \| good	0.157 \| good
2026-10-24T22:00:00.000Z	48 \| good	6.839 \| good	30.407 \| good	52.138 \| good	2.074 \| good	5.664 \| good	0.157 \| good
2026-10-24T23:00:00.000Z	45 \| good	5.291 \| good	22.933 \| good	49.252 \| good	2.11 \| good	6.106 \| good	0.158 \| good

Signal Hill

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Signal Hill, California

0.21ppm

How accurate is California, USA air quality data?

The air quality data for California, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.

Source: Ambee Data Sources

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Frequently asked questions

How frequently does the air quality data for Signal Hill, California get updated?

Air quality updates for Signal Hill, California are available every hour.

What time in the past 24 hours saw the poorest air quality in Signal Hill, California?

Signal Hill, California experienced its worst air quality at 10:00:00, 2026-10-22.

When was air quality in Signal Hill, California the best over the past 24 hours?

The best air quality in Signal Hill, California was observed at 04:00:00 on 2026-10-22.

What is the air quality in Signal Hill, California right now?

The air quality in Signal Hill, California right now is Good, with an AQI of 38.

What pollutant is most frequently found in Signal Hill, California?

In Signal Hill, California, O3 is the most frequently found pollutant.

What can I do if the air quality in Signal Hill, California is poor?

When air quality in Signal Hill, California is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in Signal Hill, California right now?

Signal Hill, California currently has a PM_2.5 concentration of 2.471 μg/m³.

What is the current level of PM₁₀ in Signal Hill, California?

Signal Hill, California currently has a PM₁₀ concentration of 7.927 μg/m³.

What is the current level of carbon monoxide (CO) in Signal Hill, California?

The current carbon monoxide (CO) level in Signal Hill, California is 0.182 ppm.

What is the current level of sulfur dioxide (SO₂) in Signal Hill, California?

The current sulfur dioxide (SO₂) concentration in Signal Hill, California is 0.3 ppb.

What is the current level of ozone (O₃) in Signal Hill, California?

Signal Hill, California currently has an ozone (O₃) concentration of 40.986 ppm.

What is the current level of nitrogen dioxide (NO₂) in Signal Hill, California?

The current level of nitrogen dioxide (NO₂) in Signal Hill, California is 2.14 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-21T00:00:00.000Z	44 \| good	8.056 \| good	34.845 \| good	41.259 \| good	0.376 \| good	5.033 \| good	0.235 \| good
2026-10-21T01:00:00.000Z	38 \| good	7.14 \| good	34.214 \| good	39.972 \| good	0.381 \| good	6.248 \| good	0.312 \| good
2026-10-21T02:00:00.000Z	38 \| good	6.625 \| good	30.466 \| good	36.433 \| good	0.384 \| good	7.01 \| good	0.288 \| good
2026-10-21T03:00:00.000Z	25 \| good	4.348 \| good	18.612 \| good	26.655 \| good	0.803 \| good	7.842 \| good	0.141 \| good
2026-10-21T04:00:00.000Z	29 \| good	5.056 \| good	22.323 \| good	30.81 \| good	0.381 \| good	8.859 \| good	0.217 \| good
2026-10-21T05:00:00.000Z	29 \| good	4.485 \| good	22.613 \| good	31.021 \| good	0.699 \| good	9.421 \| good	0.223 \| good
2026-10-21T06:00:00.000Z	27 \| good	4.808 \| good	22.701 \| good	28.313 \| good	0.323 \| good	10.6 \| good	0.209 \| good
2026-10-21T07:00:00.000Z	27 \| good	4.656 \| good	22.597 \| good	27.407 \| good	0.323 \| good	10.6 \| good	0.209 \| good
2026-10-21T08:00:00.000Z	27 \| good	5.465 \| good	20.91 \| good	25.685 \| good	0.319 \| good	10.911 \| good	0.235 \| good
2026-10-21T09:00:00.000Z	33 \| good	5.83 \| good	21.95 \| good	21.404 \| good	0.419 \| good	12.538 \| good	0.196 \| good
2026-10-21T10:00:00.000Z	27 \| good	5.409 \| good	20.708 \| good	17.468 \| good	0.391 \| good	14.473 \| good	0.253 \| good
2026-10-21T11:00:00.000Z	27 \| good	5.134 \| good	21.633 \| good	15.559 \| good	0.396 \| good	17.747 \| good	0.309 \| good
2026-10-21T12:00:00.000Z	27 \| good	4.734 \| good	19.54 \| good	12.764 \| good	0.414 \| good	18.082 \| good	0.314 \| good
2026-10-21T13:00:00.000Z	27 \| good	4.829 \| good	20.273 \| good	13.449 \| good	0.414 \| good	18.082 \| good	0.314 \| good
2026-10-21T14:00:00.000Z	33 \| good	6.406 \| good	27.695 \| good	10.38 \| good	0.416 \| good	22 \| good	0.528 \| good
2026-10-21T15:00:00.000Z	49 \| good	8.521 \| good	38.368 \| good	10.751 \| good	0.517 \| good	23.787 \| good	0.61 \| good
2026-10-21T16:00:00.000Z	54 \| moderate	10.59 \| good	44.984 \| good	13.715 \| good	0.635 \| good	22.763 \| good	0.567 \| good
2026-10-21T17:00:00.000Z	54 \| moderate	10.659 \| good	40.27 \| good	20.662 \| good	0.633 \| good	14.812 \| good	0.372 \| good
2026-10-21T18:00:00.000Z	49 \| good	9.171 \| good	37.296 \| good	24.603 \| good	0.478 \| good	9.3 \| good	0.299 \| good
2026-10-21T19:00:00.000Z	44 \| good	7.536 \| good	31.178 \| good	26.688 \| good	0.621 \| good	9.421 \| good	0.297 \| good
2026-10-21T20:00:00.000Z	38 \| good	6.811 \| good	31.27 \| good	28.947 \| good	0.539 \| good	9.217 \| good	0.279 \| good
2026-10-21T21:00:00.000Z	33 \| good	6.499 \| good	29.707 \| good	30.295 \| good	0.57 \| good	10.096 \| good	0.291 \| good
2026-10-21T22:00:00.000Z	29 \| good	5.164 \| good	31.269 \| good	30.313 \| good	0.486 \| good	12.347 \| good	0.273 \| good
2026-10-21T23:00:00.000Z	26 \| good	3.34 \| good	21.482 \| good	28.067 \| good	0.407 \| good	15.025 \| good	0.336 \| good
2026-10-22T00:00:00.000Z	24 \| good	4.271 \| good	21.024 \| good	26.267 \| good	0.414 \| good	19.478 \| good	0.416 \| good
2026-10-22T01:00:00.000Z	33 \| good	6.289 \| good	22.186 \| good	22.561 \| good	0.399 \| good	21.69 \| good	0.468 \| good
2026-10-22T02:00:00.000Z	38 \| good	6.778 \| good	24.788 \| good	24.862 \| good	0.409 \| good	17.731 \| good	0.424 \| good
2026-10-22T03:00:00.000Z	36 \| good	3.811 \| good	16.758 \| good	39.278 \| good	0.412 \| good	10.354 \| good	0.125 \| good
2026-10-22T04:00:00.000Z	38 \| good	6.55 \| good	17.49 \| good	24.568 \| good	0.324 \| good	9.747 \| good	0.303 \| good
2026-10-22T05:00:00.000Z	23 \| good	3.971 \| good	14.105 \| good	24.815 \| good	0.611 \| good	4.116 \| good	0.253 \| good
2026-10-22T06:00:00.000Z	24 \| good	3.431 \| good	11.385 \| good	25.571 \| good	0.22 \| good	3.259 \| good	0.229 \| good
2026-10-22T07:00:00.000Z	22 \| good	3.322 \| good	12.672 \| good	24.281 \| good	0.22 \| good	3.259 \| good	0.229 \| good
2026-10-22T08:00:00.000Z	24 \| good	2.853 \| good	9.633 \| good	25.988 \| good	0.297 \| good	5.055 \| good	0.171 \| good
2026-10-22T09:00:00.000Z	23 \| good	1.712 \| good	8.231 \| good	25.058 \| good	0.39 \| good	4.886 \| good	0.153 \| good
2026-10-22T10:00:00.000Z	22 \| good	1.517 \| good	7.68 \| good	23.905 \| good	0.297 \| good	8.048 \| good	0.153 \| good
2026-10-22T11:00:00.000Z	20 \| good	1.59 \| good	9.015 \| good	21.984 \| good	0.378 \| good	11.698 \| good	0.271 \| good
2026-10-22T12:00:00.000Z	19 \| good	2.597 \| good	8.697 \| good	20.795 \| good	0.297 \| good	11.552 \| good	0.303 \| good
2026-10-22T13:00:00.000Z	19 \| good	2.685 \| good	9.758 \| good	20.281 \| good	0.297 \| good	11.552 \| good	0.303 \| good
2026-10-22T14:00:00.000Z	18 \| good	2.255 \| good	8.318 \| good	17.709 \| good	0.297 \| good	18.658 \| good	0.532 \| good
2026-10-22T15:00:00.000Z	21 \| good	3.023 \| good	10.132 \| good	16.789 \| good	0.224 \| good	21.656 \| good	0.708 \| good
2026-10-22T16:00:00.000Z	18 \| good	3.246 \| good	15.977 \| good	18.804 \| good	0.377 \| good	18.124 \| good	0.664 \| good
2026-10-22T17:00:00.000Z	24 \| good	3.249 \| good	14.829 \| good	25.782 \| good	0.358 \| good	9.678 \| good	0.348 \| good
2026-10-22T18:00:00.000Z	28 \| good	2.794 \| good	11.169 \| good	29.627 \| good	0.284 \| good	6.226 \| good	0.26 \| good
2026-10-22T19:00:00.000Z	31 \| good	2.535 \| good	8.346 \| good	34.157 \| good	0.263 \| good	5.225 \| good	0.21 \| good
2026-10-22T20:00:00.000Z	34 \| good	2.093 \| good	9.293 \| good	37.217 \| good	0.273 \| good	5.756 \| good	0.197 \| good
2026-10-22T21:00:00.000Z	37 \| good	1.999 \| good	10.047 \| good	39.782 \| good	0.268 \| good	5.15 \| good	0.201 \| good
2026-10-22T22:00:00.000Z	38 \| good	1.638 \| good	7.898 \| good	40.853 \| good	0.299 \| good	5.907 \| good	0.208 \| good
2026-10-22T23:00:00.000Z	38 \| good	2.471 \| good	7.927 \| good	40.986 \| good	0.3 \| good	2.14 \| good	0.182 \| good
2026-10-23T00:00:00.000Z	33 \| good	2.114 \| good	8.635 \| good	35.952 \| good	0.813 \| good	3.386 \| good	0.142 \| good
2026-10-23T01:00:00.000Z	29 \| good	2.499 \| good	10.056 \| good	31.18 \| good	0.874 \| good	5.074 \| good	0.146 \| good
2026-10-23T02:00:00.000Z	27 \| good	1.84 \| good	7.775 \| good	28.833 \| good	0.949 \| good	10.439 \| good	0.163 \| good
2026-10-23T03:00:00.000Z	28 \| good	2.194 \| good	8.976 \| good	30.093 \| good	1.072 \| good	16.331 \| good	0.18 \| good
2026-10-23T04:00:00.000Z	27 \| good	1.798 \| good	7.602 \| good	28.542 \| good	1.209 \| good	21.271 \| good	0.194 \| good
2026-10-23T05:00:00.000Z	25 \| good	2.357 \| good	9.904 \| good	27.402 \| good	1.335 \| good	23.042 \| good	0.207 \| good
2026-10-23T06:00:00.000Z	24 \| good	3.107 \| good	13.522 \| good	25.701 \| good	1.358 \| good	23.113 \| good	0.209 \| good
2026-10-23T07:00:00.000Z	23 \| good	3.758 \| good	16.563 \| good	24.886 \| good	1.306 \| good	21.478 \| good	0.201 \| good
2026-10-23T08:00:00.000Z	27 \| good	5.342 \| good	23.226 \| good	25.051 \| good	1.261 \| good	17.854 \| good	0.19 \| good
2026-10-23T09:00:00.000Z	22 \| good	3.94 \| good	17.475 \| good	24.233 \| good	1.179 \| good	15.315 \| good	0.182 \| good
2026-10-23T10:00:00.000Z	22 \| good	3.751 \| good	16.35 \| good	23.573 \| good	1.086 \| good	12.565 \| good	0.173 \| good
2026-10-23T11:00:00.000Z	22 \| good	4.284 \| good	18.833 \| good	20.957 \| good	0.996 \| good	11.778 \| good	0.17 \| good
2026-10-23T12:00:00.000Z	27 \| good	5.287 \| good	23.015 \| good	9.973 \| good	0.955 \| good	11.497 \| good	0.169 \| good
2026-10-23T13:00:00.000Z	38 \| good	6.712 \| good	29.798 \| good	4.708 \| good	0.922 \| good	10.042 \| good	0.164 \| good
2026-10-23T14:00:00.000Z	52 \| moderate	9.773 \| good	43.203 \| good	2.893 \| good	0.923 \| good	11.75 \| good	0.17 \| good
2026-10-23T15:00:00.000Z	49 \| good	9.344 \| good	41.472 \| good	9.626 \| good	0.939 \| good	11.701 \| good	0.181 \| good
2026-10-23T16:00:00.000Z	33 \| good	5.653 \| good	24.374 \| good	18.887 \| good	0.925 \| good	6.126 \| good	0.152 \| good
2026-10-23T17:00:00.000Z	27 \| good	4.684 \| good	20.235 \| good	25.411 \| good	0.973 \| good	4.511 \| good	0.144 \| good
2026-10-23T18:00:00.000Z	29 \| good	4.099 \| good	18.238 \| good	31.006 \| good	1.079 \| good	4.223 \| good	0.14 \| good
2026-10-23T19:00:00.000Z	32 \| good	5.192 \| good	22.642 \| good	34.78 \| good	1.21 \| good	4.095 \| good	0.14 \| good
2026-10-23T20:00:00.000Z	36 \| good	6.388 \| good	28.479 \| good	38.989 \| good	1.297 \| good	3.679 \| good	0.138 \| good
2026-10-23T21:00:00.000Z	38 \| good	6.637 \| good	29.503 \| good	40.293 \| good	1.34 \| good	3.578 \| good	0.137 \| good
2026-10-23T22:00:00.000Z	38 \| good	6.481 \| good	28.911 \| good	41.384 \| good	1.393 \| good	3.57 \| good	0.137 \| good
2026-10-23T23:00:00.000Z	39 \| good	7.487 \| good	33.159 \| good	42.489 \| good	1.484 \| good	4.05 \| good	0.138 \| good
2026-10-24T00:00:00.000Z	44 \| good	8.216 \| good	36.477 \| good	42.813 \| good	1.56 \| good	5.006 \| good	0.141 \| good
2026-10-24T01:00:00.000Z	44 \| good	8.256 \| good	35.971 \| good	39.839 \| good	1.581 \| good	7.4 \| good	0.146 \| good
2026-10-24T02:00:00.000Z	33 \| good	5.8 \| good	25.217 \| good	35.054 \| good	1.617 \| good	13.399 \| good	0.165 \| good
2026-10-24T03:00:00.000Z	38 \| good	6.95 \| good	30.564 \| good	33.754 \| good	1.646 \| good	18.577 \| good	0.18 \| good
2026-10-24T04:00:00.000Z	44 \| good	7.745 \| good	33.8 \| good	27.032 \| good	1.698 \| good	22.725 \| good	0.193 \| good
2026-10-24T05:00:00.000Z	44 \| good	8.395 \| good	36.599 \| good	22.345 \| good	1.754 \| good	23.972 \| good	0.206 \| good
2026-10-24T06:00:00.000Z	38 \| good	7.482 \| good	32.8 \| good	18.925 \| good	1.799 \| good	24.747 \| good	0.213 \| good
2026-10-24T07:00:00.000Z	38 \| good	7.128 \| good	31.596 \| good	15.737 \| good	1.793 \| good	24.475 \| good	0.222 \| good
2026-10-24T08:00:00.000Z	49 \| good	9.431 \| good	41.775 \| good	16.206 \| good	1.7 \| good	23.598 \| good	0.223 \| good
2026-10-24T09:00:00.000Z	52 \| moderate	10.18 \| good	45.576 \| good	15.115 \| good	1.6 \| good	22.568 \| good	0.222 \| good
2026-10-24T10:00:00.000Z	56 \| moderate	12.128 \| fine	53.796 \| good	13.517 \| good	1.479 \| good	21.326 \| good	0.223 \| good
2026-10-24T11:00:00.000Z	60 \| moderate	14.055 \| fine	62.697 \| fine	12.565 \| good	1.358 \| good	20.094 \| good	0.223 \| good
2026-10-24T12:00:00.000Z	66 \| moderate	16.955 \| fine	75.381 \| fine	13.454 \| good	1.254 \| good	18.991 \| good	0.222 \| good
2026-10-24T13:00:00.000Z	71 \| moderate	20.325 \| fine	89.108 \| fine	15.895 \| good	1.173 \| good	18.068 \| good	0.222 \| good
2026-10-24T14:00:00.000Z	79 \| moderate	23.648 \| fine	103.49 \| fine	17.687 \| good	1.152 \| good	17.633 \| good	0.227 \| good
2026-10-24T15:00:00.000Z	77 \| moderate	23.035 \| fine	101.119 \| fine	16.922 \| good	1.136 \| good	15.829 \| good	0.242 \| good
2026-10-24T16:00:00.000Z	67 \| moderate	17.692 \| fine	78.661 \| fine	23.547 \| good	1.18 \| good	13.578 \| good	0.243 \| good
2026-10-24T17:00:00.000Z	60 \| moderate	13.877 \| fine	62.278 \| fine	34.29 \| good	1.441 \| good	10.925 \| good	0.191 \| good
2026-10-24T18:00:00.000Z	54 \| moderate	11.46 \| good	50.687 \| good	37.959 \| good	1.892 \| good	7.958 \| good	0.168 \| good
2026-10-24T19:00:00.000Z	54 \| moderate	11.187 \| good	49.458 \| good	42.37 \| good	1.993 \| good	6.685 \| good	0.162 \| good
2026-10-24T20:00:00.000Z	52 \| moderate	10.394 \| good	45.713 \| good	47.27 \| good	2.002 \| good	5.98 \| good	0.158 \| good
2026-10-24T21:00:00.000Z	49 \| good	8.84 \| good	39.013 \| good	50.449 \| good	2.021 \| good	5.648 \| good	0.157 \| good
2026-10-24T22:00:00.000Z	48 \| good	6.839 \| good	30.407 \| good	52.138 \| good	2.074 \| good	5.664 \| good	0.157 \| good
2026-10-24T23:00:00.000Z	45 \| good	5.291 \| good	22.933 \| good	49.252 \| good	2.11 \| good	6.106 \| good	0.158 \| good

Current air quality index in Signal Hill, California today

Common air pollutants in Signal Hill, California

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Signal Hill, California air quality forecast and history

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Signal Hill, California

Air quality in nearby cities

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Lakewood, California

Rossmoor, California

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Seal Beach, California

Hawaiian Gardens, California

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Frequently asked questions

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What is the air quality in Signal Hill, California right now?

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What is the PM2.5 concentration in Signal Hill, California right now?

What is the current level of PM10 in Signal Hill, California?

What is the current level of carbon monoxide (CO) in Signal Hill, California?

What is the current level of sulfur dioxide (SO2) in Signal Hill, California?

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Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 concentration in Signal Hill, California right now?

What is the current level of PM₁₀ in Signal Hill, California?

What is the current level of sulfur dioxide (SO₂) in Signal Hill, California?

What is the current level of ozone (O₃) in Signal Hill, California?

What is the current level of nitrogen dioxide (NO₂) in Signal Hill, California?