Metro area air quality · 2025

Torrington, CT

Median AQI 41 (Good). 81.8% of monitored days rated Good across this metro's EPA monitoring network.

41
Median AQI
81.8%
Good-air days
1
Unhealthy days
68%
Cleaner than US metros

Aggregated from EPA Air Quality System (2025), 181 monitored days. EPA AQS →

The verdict

The Torrington, CT metro runs good on the EPA scale, cleaner than the median US metro, a median AQI of 41 with 81.8% of 181 monitored days in the Good band.

41
median AQI · Good
81.8%
days rated Good
68%
cleaner than US metros
161
worst single reading

1 day reached Unhealthy or worse across the metro's monitors in 2025.

Insights: Torrington, CT metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 41 over 181 measured days in 2025, which corresponds to a Good band and a Good metro-wide health grade. The monitored-day split lands at 148 Good days (82%), 29 Moderate (16%), and 3 Unhealthy-for-Sensitive-Groups (2%). The 90th-percentile AQI finished at 64 while the highest single-day reading hit 161 (Unhealthy). Metro residents averaged roughly 24.5 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by -152 and the median AQI moved +2 points, which classifies the multi-year trajectory as stable. The metro recorded 1 unhealthy-or-worse days combined, on those days the EPA recommends that sensitive groups limit prolonged outdoor exertion, and many schools and athletic programs adjust outdoor activity accordingly. Metros with comparable AQI profiles include Adrian, MI (77.3% good, AQI 41); Altoona, PA (71.9% good, AQI 41); Ann Arbor, MI (76.0% good, AQI 41).

Air Quality Summary

Median AQI

41

Good

Good Days

81.8%

148 of 181 days

Max AQI

161

Unhealthy

Health Grade

Good

90th pct: 64

AQI Day Breakdown (2025)

Distribution of 181 monitored days across EPA AQI categories.

Good

148

82%

Moderate

29

16%

USG

3

2%

Unhealthy

1

1%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Good

The Torrington, CT metro area's air quality is rated Good based on 81.8% good air days. There were 1 unhealthy days in 2025 when outdoor activity should be limited.

Air quality is acceptable most days, but 3 days reached "Unhealthy for Sensitive Groups" and peak AQI reached 161. Sensitive groups should monitor real-time conditions at AirNow.gov.

How does the Torrington, CT metro compare?

How Torrington, CT compares

Good-day share better than US avg
Torrington, CT 81.8%
Adrian, MI 77.3%
US average 71.3%
Median AQI about average
Torrington, CT 41
Adrian, MI 41
US average 41
Unhealthy days / yr about average
Torrington, CT 1
Adrian, MI 0
US average 1

5-Year Air Quality Trend

Air quality is stable in the Torrington, CT metro. Best year: 2022 (308 good days).

Year Good Moderate Unhealthy Median AQI
2020 300 62 0 39
2021 300 61 0 38
2022 308 54 0 40
2023 285 72 4 38
2024 305 49 0 38
2025 148 29 1 41

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Torrington, CT.

Adrian, MI

AQI 41 · 77.3% good

41

Altoona, PA

AQI 41 · 71.9% good

41

Ann Arbor, MI

AQI 41 · 76.0% good

41

Bowling Green, KY

AQI 41 · 81.2% good

41

Charlottesville, VA

AQI 41 · 77.9% good

41

Clarksville, TN-KY

AQI 41 · 76.8% good

41

More Air Quality Data

Explore EPA air quality rankings and guides across U.S. metros and counties.

Cleanest Metro Areas

U.S. metros ranked by their share of Good air-quality days.

Worst Air Quality

Counties and metros with the most unhealthy air days.

All Metro Areas

Annual AQI by CBSA for every monitored U.S. metro area.

Best and Worst City Air

What drives urban air quality and how metro areas compare.

Air Quality Guides

Frequently Asked Questions

What is the air quality in the Torrington, CT metro area? ▼
The Torrington, CT metro area has a median Air Quality Index (AQI) of 41, rated "Good." 81.8% of monitored days (148 out of 181) had good air quality in 2025.
How many unhealthy air days does Torrington, CT have? ▼
In 2025, the Torrington, CT metro area recorded 1 unhealthy air days (1 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 161.
Is air quality in Torrington, CT getting better or worse? ▼
Air quality in the Torrington, CT metro is stable based on 5-year trends (2020-2025). Best year: 2022 with 308 good days. Worst year: 2025 with 148 good days.
What does AQI 41 mean for health? ▼
An AQI of 41 is "Good", air quality is satisfactory and poses little or no health risk. This is the best category on the EPA's AQI scale.
What is the 90th percentile AQI for Torrington, CT? ▼
The 90th percentile AQI for the Torrington, CT metro area is 64, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 161 (Unhealthy).
How does Torrington, CT compare to other metro areas? ▼
The Torrington, CT metro has 81.8% good air days. Similar metros: Adrian, MI (77.3% good), Altoona, PA (71.9% good), Ann Arbor, MI (76.0% good).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset, 2020–2025. See our methodology for how AQI, median, and coverage figures are computed.

Read our methodology , how this data is sourced, computed, and verified.

Source: U.S. EPA Air Quality System (AQS) Annual AQI by CBSA summary files (metro-level) · 2020–2025

Every figure on PlainAir is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.