What is the current level of PM10 in Watertown, Connecticut?

Watertown, Connecticut currently has a PM10 concentration of 34.745 μg/m3.

What is the current level of sulfur dioxide (SO2) in Watertown, Connecticut?

The current sulfur dioxide (SO2) concentration in Watertown, Connecticut is 0.419 ppb.

What is the current level of ozone (O3) in Watertown, Connecticut?

Watertown, Connecticut currently has an ozone (O3) concentration of 47.739 ppm.

What is the current level of nitrogen dioxide (NO2) in Watertown, Connecticut?

The current level of nitrogen dioxide (NO2) in Watertown, Connecticut is 3.585 ppb.

Current air quality index in Watertown, Connecticut today

Q: What is the PM2.5 concentration in Watertown, Connecticut right now?

Watertown, Connecticut currently has a PM2.5 concentration of 8.029 μg/m3.

Stay updated with real-time air quality in Watertown, Connecticut 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

Watertown, Connecticut

Last updated: ... (Local time)

Common air pollutants in Watertown, Connecticut

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

8.03 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

34.74 μg/m³

155

255

425

605+

Ozone (O₃)

47.74 ppb

201

201+

Sulfur Dioxide (SO₂)

0.42 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.58 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.22 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

Please contact us for custom requests

Watertown, Connecticut

Scroll To Air Quality Map

Track live Watertown, Connecticut air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-06-09T23:00:00.000Z	58 \| moderate	5.521 \| good	17.38 \| good	57.179 \| fine	0.53 \| good	9.153 \| good	0.234 \| good
2026-06-10T00:00:00.000Z	58 \| moderate	5.844 \| good	17.377 \| good	56.858 \| fine	0.471 \| good	8.077 \| good	0.198 \| good
2026-06-10T01:00:00.000Z	44 \| good	5.73 \| good	17.216 \| good	47.875 \| good	0.5 \| good	6.831 \| good	0.198 \| good
2026-06-10T02:00:00.000Z	39 \| good	5.407 \| good	15.436 \| good	41.909 \| good	0.629 \| good	6.214 \| good	0.207 \| good
2026-06-10T03:00:00.000Z	38 \| good	6.894 \| good	30.016 \| good	40.605 \| good	0.551 \| good	7.867 \| good	0.162 \| good
2026-06-10T04:00:00.000Z	32 \| good	4.758 \| good	13.876 \| good	35.294 \| good	0.315 \| good	8.709 \| good	0.187 \| good
2026-06-10T05:00:00.000Z	33 \| good	4.702 \| good	12.364 \| good	36.373 \| good	0.199 \| good	7.497 \| good	0.187 \| good
2026-06-10T06:00:00.000Z	35 \| good	4.807 \| good	13.146 \| good	38.178 \| good	0.442 \| good	14.729 \| good	0.15 \| good
2026-06-10T07:00:00.000Z	35 \| good	4.8 \| good	13.353 \| good	37.93 \| good	0.444 \| good	14.035 \| good	0.13 \| good
2026-06-10T08:00:00.000Z	30 \| good	5.341 \| good	14.837 \| good	32.25 \| good	0.187 \| good	12.335 \| good	0.179 \| good
2026-06-10T09:00:00.000Z	27 \| good	5.482 \| good	14.276 \| good	26.776 \| good	0.214 \| good	13.055 \| good	0.179 \| good
2026-06-10T10:00:00.000Z	33 \| good	5.608 \| good	14.349 \| good	25.506 \| good	0.276 \| good	14.271 \| good	0.199 \| good
2026-06-10T11:00:00.000Z	33 \| good	6.165 \| good	24.048 \| good	30.318 \| good	0.405 \| good	13.866 \| good	0.263 \| good
2026-06-10T12:00:00.000Z	38 \| good	6.604 \| good	25.061 \| good	29.007 \| good	0.447 \| good	13.242 \| good	0.263 \| good
2026-06-10T13:00:00.000Z	38 \| good	6.644 \| good	25.694 \| good	28.516 \| good	0.595 \| good	11.065 \| good	0.251 \| good
2026-06-10T14:00:00.000Z	44 \| good	8.029 \| good	36.068 \| good	29.98 \| good	0.43 \| good	11.413 \| good	0.27 \| good
2026-06-10T15:00:00.000Z	44 \| good	8.027 \| good	33.745 \| good	28.637 \| good	0.644 \| good	11.114 \| good	0.27 \| good
2026-06-10T16:00:00.000Z	49 \| good	8.789 \| good	36.27 \| good	36.371 \| good	1.251 \| good	15.695 \| good	0.272 \| good
2026-06-10T17:00:00.000Z	52 \| moderate	9.849 \| good	49.535 \| good	40.55 \| good	0.648 \| good	10.373 \| good	0.251 \| good
2026-06-10T18:00:00.000Z	79 \| moderate	13.251 \| fine	112.001 \| fine	47.739 \| good	0.617 \| good	7.576 \| good	0.251 \| good
2026-06-10T19:00:00.000Z	78 \| moderate	13.917 \| fine	108.996 \| fine	53.235 \| good	0.433 \| good	6.234 \| good	0.271 \| good
2026-06-10T20:00:00.000Z	58 \| moderate	12.19 \| fine	68.749 \| fine	50.773 \| good	0.441 \| good	5.141 \| good	0.251 \| good
2026-06-10T21:00:00.000Z	54 \| moderate	11.296 \| good	47.083 \| good	54.542 \| good	0.251 \| good	6.089 \| good	0.25 \| good
2026-06-10T22:00:00.000Z	54 \| moderate	11.018 \| good	36.334 \| good	54.115 \| good	0.28 \| good	6.368 \| good	0.25 \| good
2026-06-10T23:00:00.000Z	54 \| moderate	10.962 \| good	30.998 \| good	50.457 \| good	0.498 \| good	5.558 \| good	0.27 \| good
2026-06-11T00:00:00.000Z	54 \| moderate	11.275 \| good	28.708 \| good	52.421 \| good	0.402 \| good	5.901 \| good	0.25 \| good
2026-06-11T01:00:00.000Z	56 \| moderate	11.819 \| good	27.305 \| good	45.474 \| good	0.38 \| good	6.001 \| good	0.27 \| good
2026-06-11T02:00:00.000Z	56 \| moderate	12.353 \| fine	25.878 \| good	49.995 \| good	0.338 \| good	5.63 \| good	0.222 \| good
2026-06-11T03:00:00.000Z	58 \| moderate	12.9 \| fine	26.658 \| good	41.956 \| good	0.339 \| good	5.41 \| good	0.202 \| good
2026-06-11T04:00:00.000Z	58 \| moderate	13.234 \| fine	25.779 \| good	38.423 \| good	0.477 \| good	6.338 \| good	0.194 \| good
2026-06-11T05:00:00.000Z	58 \| moderate	13.261 \| fine	26.572 \| good	35.54 \| good	0.593 \| good	6.027 \| good	0.186 \| good
2026-06-11T06:00:00.000Z	58 \| moderate	13.264 \| fine	26.568 \| good	36.387 \| good	0.59 \| good	6.56 \| good	0.181 \| good
2026-06-11T07:00:00.000Z	58 \| moderate	13.245 \| fine	25.835 \| good	27.262 \| good	0.477 \| good	6.426 \| good	0.183 \| good
2026-06-11T08:00:00.000Z	60 \| moderate	13.793 \| fine	24.647 \| good	29.193 \| good	0.457 \| good	8.669 \| good	0.186 \| good
2026-06-11T09:00:00.000Z	60 \| moderate	13.902 \| fine	24.431 \| good	29.153 \| good	0.401 \| good	8.205 \| good	0.186 \| good
2026-06-11T10:00:00.000Z	60 \| moderate	13.9 \| fine	23.492 \| good	25.737 \| good	0.486 \| good	10.893 \| good	0.199 \| good
2026-06-11T11:00:00.000Z	60 \| moderate	13.926 \| fine	24.773 \| good	22.481 \| good	0.547 \| good	12.355 \| good	0.205 \| good
2026-06-11T12:00:00.000Z	38 \| good	6.949 \| good	24.604 \| good	23.81 \| good	0.681 \| good	11.395 \| good	0.233 \| good
2026-06-11T13:00:00.000Z	38 \| good	6.677 \| good	24.915 \| good	24.964 \| good	0.679 \| good	11.297 \| good	0.266 \| good
2026-06-11T14:00:00.000Z	62 \| moderate	14.577 \| fine	51.096 \| good	25.196 \| good	0.531 \| good	11.755 \| good	0.276 \| good
2026-06-11T15:00:00.000Z	54 \| moderate	11.323 \| good	36.892 \| good	31.875 \| good	0.459 \| good	8.36 \| good	0.268 \| good
2026-06-11T16:00:00.000Z	52 \| moderate	10.122 \| good	38.493 \| good	36.385 \| good	0.348 \| good	5.55 \| good	0.229 \| good
2026-06-11T17:00:00.000Z	52 \| moderate	9.608 \| good	36.874 \| good	39.938 \| good	0.334 \| good	4.732 \| good	0.27 \| good
2026-06-11T18:00:00.000Z	49 \| good	9.471 \| good	40.919 \| good	44.44 \| good	0.367 \| good	5.253 \| good	0.221 \| good
2026-06-11T19:00:00.000Z	52 \| moderate	9.517 \| good	43.767 \| good	47.532 \| good	0.503 \| good	5.886 \| good	0.22 \| good
2026-06-11T20:00:00.000Z	49 \| good	8.964 \| good	33.626 \| good	49.675 \| good	0.519 \| good	4.967 \| good	0.228 \| good
2026-06-11T21:00:00.000Z	44 \| good	8.029 \| good	34.745 \| good	47.739 \| good	0.419 \| good	3.585 \| good	0.22 \| good
2026-06-11T22:00:00.000Z	48 \| good	7.905 \| good	35.358 \| good	52.363 \| good	0.559 \| good	3.106 \| good	0.189 \| good
2026-06-11T22:00:00.000Z	44 \| good	8.029 \| good	34.745 \| good	47.739 \| good	0.419 \| good	3.585 \| good	0.22 \| good
2026-06-11T23:00:00.000Z	41 \| good	7.163 \| good	31.991 \| good	43.564 \| good	0.174 \| good	1.972 \| good	0.16 \| good
2026-06-12T00:00:00.000Z	44 \| good	7.769 \| good	34.003 \| good	41.115 \| good	0.174 \| good	2.776 \| good	0.166 \| good
2026-06-12T01:00:00.000Z	44 \| good	7.65 \| good	33.989 \| good	38.237 \| good	0.181 \| good	3.589 \| good	0.17 \| good
2026-06-12T02:00:00.000Z	38 \| good	7.2 \| good	31.998 \| good	35.651 \| good	0.182 \| good	3.791 \| good	0.17 \| good
2026-06-12T03:00:00.000Z	38 \| good	6.96 \| good	30.995 \| good	31.35 \| good	0.178 \| good	3.632 \| good	0.167 \| good
2026-06-12T04:00:00.000Z	33 \| good	5.673 \| good	24.017 \| good	29.196 \| good	0.169 \| good	3.568 \| good	0.166 \| good
2026-06-12T05:00:00.000Z	33 \| good	5.903 \| good	26.973 \| good	27.233 \| good	0.16 \| good	3.741 \| good	0.168 \| good
2026-06-12T06:00:00.000Z	33 \| good	5.687 \| good	24.03 \| good	27.009 \| good	0.157 \| good	4.125 \| good	0.169 \| good
2026-06-12T07:00:00.000Z	33 \| good	6.094 \| good	27.015 \| good	25.348 \| good	0.152 \| good	3.613 \| good	0.163 \| good
2026-06-12T08:00:00.000Z	33 \| good	6.43 \| good	28.991 \| good	23.715 \| good	0.146 \| good	2.883 \| good	0.157 \| good
2026-06-12T09:00:00.000Z	38 \| good	6.57 \| good	29.012 \| good	23.65 \| good	0.15 \| good	2.569 \| good	0.155 \| good
2026-06-12T10:00:00.000Z	38 \| good	7.289 \| good	31.999 \| good	23.152 \| good	0.168 \| good	2.464 \| good	0.156 \| good
2026-06-12T11:00:00.000Z	38 \| good	7.008 \| good	30.997 \| good	27.382 \| good	0.252 \| good	1.523 \| good	0.153 \| good
2026-06-12T12:00:00.000Z	44 \| good	7.838 \| good	34.002 \| good	34.513 \| good	0.33 \| good	1.165 \| good	0.152 \| good
2026-06-12T13:00:00.000Z	38 \| good	6.733 \| good	29.997 \| good	39.346 \| good	0.353 \| good	0.979 \| good	0.151 \| good
2026-06-12T14:00:00.000Z	42 \| good	6.111 \| good	27.016 \| good	45.087 \| good	0.35 \| good	0.833 \| good	0.152 \| good
2026-06-12T15:00:00.000Z	45 \| good	7.405 \| good	32.995 \| good	49.334 \| good	0.34 \| good	0.688 \| good	0.151 \| good
2026-06-12T16:00:00.000Z	51 \| moderate	9.486 \| good	41.996 \| good	54.519 \| good	0.327 \| good	0.59 \| good	0.15 \| good
2026-06-12T17:00:00.000Z	54 \| moderate	11.083 \| good	48.993 \| good	55.814 \| fine	0.305 \| good	0.542 \| good	0.149 \| good
2026-06-12T18:00:00.000Z	52 \| moderate	10.482 \| good	46.008 \| good	55.128 \| fine	0.28 \| good	0.537 \| good	0.151 \| good
2026-06-12T19:00:00.000Z	50 \| good	8.504 \| good	37.008 \| good	53.812 \| good	0.257 \| good	0.531 \| good	0.153 \| good
2026-06-12T20:00:00.000Z	49 \| good	8.224 \| good	36.008 \| good	52.63 \| good	0.226 \| good	0.672 \| good	0.156 \| good
2026-06-12T21:00:00.000Z	49 \| good	7.983 \| good	35.004 \| good	52.848 \| good	0.192 \| good	1.098 \| good	0.163 \| good
2026-06-12T22:00:00.000Z	48 \| good	8.468 \| good	37.012 \| good	51.565 \| good	0.16 \| good	1.494 \| good	0.162 \| good
2026-06-12T23:00:00.000Z	45 \| good	7.491 \| good	32.994 \| good	49.396 \| good	0.129 \| good	1.891 \| good	0.161 \| good
2026-06-13T00:00:00.000Z	47 \| good	5.56 \| good	23.998 \| good	51.201 \| good	0.137 \| good	4.276 \| good	0.191 \| good
2026-06-13T01:00:00.000Z	47 \| good	5.272 \| good	22.995 \| good	50.935 \| good	0.143 \| good	3.793 \| good	0.178 \| good
2026-06-13T02:00:00.000Z	49 \| good	9.462 \| good	41.998 \| good	46.191 \| good	0.141 \| good	3.156 \| good	0.168 \| good
2026-06-13T03:00:00.000Z	58 \| moderate	13.162 \| fine	58.997 \| fine	43.07 \| good	0.139 \| good	3.139 \| good	0.166 \| good
2026-06-13T04:00:00.000Z	56 \| moderate	11.829 \| good	52.001 \| good	43.215 \| good	0.133 \| good	2.911 \| good	0.164 \| good
2026-06-13T05:00:00.000Z	52 \| moderate	10.318 \| good	45.99 \| good	38.024 \| good	0.121 \| good	2.375 \| good	0.159 \| good
2026-06-13T06:00:00.000Z	49 \| good	8.88 \| good	39.001 \| good	33.929 \| good	0.13 \| good	1.83 \| good	0.151 \| good
2026-06-13T07:00:00.000Z	49 \| good	8.743 \| good	38.014 \| good	31.295 \| good	0.168 \| good	1.54 \| good	0.14 \| good
2026-06-13T08:00:00.000Z	44 \| good	7.981 \| good	34.996 \| good	30.034 \| good	0.206 \| good	1.373 \| good	0.123 \| good
2026-06-13T09:00:00.000Z	44 \| good	7.703 \| good	34 \| good	26.743 \| good	0.22 \| good	1.322 \| good	0.11 \| good
2026-06-13T10:00:00.000Z	44 \| good	8.134 \| good	35.983 \| good	25.628 \| good	0.208 \| good	1.343 \| good	0.104 \| good
2026-06-13T11:00:00.000Z	44 \| good	8.03 \| good	35.005 \| good	27.615 \| good	0.185 \| good	1.242 \| good	0.104 \| good
2026-06-13T12:00:00.000Z	49 \| good	8.539 \| good	37.013 \| good	32.101 \| good	0.171 \| good	1.092 \| good	0.107 \| good
2026-06-13T13:00:00.000Z	44 \| good	7.859 \| good	34.006 \| good	36.03 \| good	0.153 \| good	0.788 \| good	0.108 \| good
2026-06-13T14:00:00.000Z	38 \| good	7.103 \| good	31.983 \| good	39.558 \| good	0.126 \| good	0.574 \| good	0.111 \| good
2026-06-13T15:00:00.000Z	39 \| good	6.967 \| good	30.991 \| good	42.373 \| good	0.104 \| good	0.44 \| good	0.113 \| good
2026-06-13T16:00:00.000Z	42 \| good	7.241 \| good	31.997 \| good	45.236 \| good	0.102 \| good	0.372 \| good	0.114 \| good
2026-06-13T17:00:00.000Z	44 \| good	8.079 \| good	35.001 \| good	46.947 \| good	0.116 \| good	0.339 \| good	0.114 \| good
2026-06-13T18:00:00.000Z	44 \| good	7.239 \| good	31.988 \| good	48.095 \| good	0.137 \| good	0.337 \| good	0.114 \| good
2026-06-13T19:00:00.000Z	44 \| good	5.402 \| good	22.999 \| good	48.256 \| good	0.161 \| good	0.351 \| good	0.114 \| good
2026-06-13T20:00:00.000Z	45 \| good	4.986 \| good	21.01 \| good	48.582 \| good	0.184 \| good	0.387 \| good	0.115 \| good
2026-06-13T21:00:00.000Z	44 \| good	4.921 \| good	21.006 \| good	48.298 \| good	0.197 \| good	0.506 \| good	0.118 \| good
2026-06-13T22:00:00.000Z	44 \| good	5.281 \| good	22.999 \| good	47.099 \| good	0.196 \| good	0.737 \| good	0.123 \| good

Watertown

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Watertown, Connecticut

0.23ppm

How accurate is Connecticut, USA air quality data?

The air quality data for Connecticut, 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

Air quality levels in US

Check live rankings of places in the USA affected by air pollution.

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

Frequently asked questions

How frequently does the air quality data for Watertown, Connecticut get updated?

Air quality updates for Watertown, Connecticut are available every hour.

What time in the past 24 hours saw the poorest air quality in Watertown, Connecticut?

Watertown, Connecticut experienced its worst air quality at 02:00:00, 2026-06-11.

When was air quality in Watertown, Connecticut the best over the past 24 hours?

The best air quality in Watertown, Connecticut was observed at 01:00:00 on 2026-06-11.

What is the air quality in Watertown, Connecticut right now?

The air quality in Watertown, Connecticut right now is Good, with an AQI of 44.

What pollutant is most frequently found in Watertown, Connecticut?

In Watertown, Connecticut, O3 is the most frequently found pollutant.

What can I do if the air quality in Watertown, Connecticut is poor?

When air quality in Watertown, Connecticut is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in Watertown, Connecticut right now?

Watertown, Connecticut currently has a PM_2.5 concentration of 8.029 μg/m³.

What is the current level of PM₁₀ in Watertown, Connecticut?

Watertown, Connecticut currently has a PM₁₀ concentration of 34.745 μg/m³.

What is the current level of carbon monoxide (CO) in Watertown, Connecticut?

The current carbon monoxide (CO) level in Watertown, Connecticut is 0.22 ppm.

What is the current level of sulfur dioxide (SO₂) in Watertown, Connecticut?

The current sulfur dioxide (SO₂) concentration in Watertown, Connecticut is 0.419 ppb.

What is the current level of ozone (O₃) in Watertown, Connecticut?

Watertown, Connecticut currently has an ozone (O₃) concentration of 47.739 ppm.

What is the current level of nitrogen dioxide (NO₂) in Watertown, Connecticut?

The current level of nitrogen dioxide (NO₂) in Watertown, Connecticut is 3.585 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions