Metro area air quality · 2025

Jasper, IN

Median AQI 39 (Good). 67.2% of monitored days rated Good across this metro's EPA monitoring network.

39
Median AQI
67.2%
Good-air days
0
Unhealthy days
39%
Cleaner than US metros

Aggregated from EPA Air Quality System (2025), 271 monitored days. EPA AQS →

The verdict

The Jasper, IN metro runs good on the EPA scale, more polluted than the median US metro, a median AQI of 39 with 67.2% of 271 monitored days in the Good band.

39
median AQI · Good
67.2%
days rated Good
39%
cleaner than US metros
88
worst single reading

No day crossed into the Unhealthy tier across the metro's monitors in 2025.

Insights: Jasper, IN metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 39 over 271 measured days in 2025, which corresponds to a Good band and a Moderate metro-wide health grade. The monitored-day split lands at 182 Good days (67%), 89 Moderate (33%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 58 while the highest single-day reading hit 88 (Moderate). Metro residents averaged roughly 20.1 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by +104 and the median AQI moved -5 points, which classifies the multi-year trajectory as improving. The metro avoided any Unhealthy-tier days entirely, an outcome that typically reflects favorable wind patterns, lower industrial density, or effective regional emission controls. Metros with comparable AQI profiles include Beaver Dam, WI (76.4% good, AQI 39); Bennington, VT (82.9% good, AQI 39); Billings, MT (86.7% good, AQI 39).

Air Quality Summary

Median AQI

39

Good

Good Days

67.2%

182 of 271 days

Max AQI

88

Moderate

Health Grade

Moderate

90th pct: 58

AQI Day Breakdown (2025)

Distribution of 271 monitored days across EPA AQI categories.

Good

182

67%

Moderate

89

33%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Moderate

The Jasper, IN metro area's air quality is rated Moderate based on 67.2% good air days. No unhealthy air days were recorded in 2025.

Air quality is generally acceptable. Unusually sensitive people should monitor real-time conditions at AirNow.gov during high-pollution events.

How does the Jasper, IN metro compare?

How Jasper, IN compares

Good-day share worse than US avg
Jasper, IN 67.2%
Beaver Dam, WI 76.4%
US average 71.3%
Median AQI better than US avg
Jasper, IN 39
Beaver Dam, WI 39
US average 41
Unhealthy days / yr better than US avg
Jasper, IN 0
Beaver Dam, WI 0
US average 1

5-Year Air Quality Trend

Air quality is improving in the Jasper, IN metro. Best year: 2024 (265 good days).

Year Good Moderate Unhealthy Median AQI
2020 78 45 0 44
2021 77 48 0 43
2022 80 43 0 42
2023 152 86 0 44
2024 265 101 0 39
2025 182 89 0 39

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Jasper, IN.

Beaver Dam, WI

AQI 39 · 76.4% good

39

Bennington, VT

AQI 39 · 82.9% good

39

Billings, MT

AQI 39 · 86.7% good

39

Blacksburg-Christiansburg-Radford, VA

AQI 39 · 92.4% good

39

Brainerd, MN

AQI 39 · 84.4% good

39

Brunswick, GA

AQI 39 · 81.9% good

39

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 Jasper, IN metro area? ▼
The Jasper, IN metro area has a median Air Quality Index (AQI) of 39, rated "Good." 67.2% of monitored days (182 out of 271) had good air quality in 2025.
How many unhealthy air days does Jasper, IN have? ▼
In 2025, the Jasper, IN metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 88.
Is air quality in Jasper, IN getting better or worse? ▼
Air quality in the Jasper, IN metro is improving based on 5-year trends (2020-2025). Best year: 2024 with 265 good days. Worst year: 2021 with 77 good days.
What does AQI 39 mean for health? ▼
An AQI of 39 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 Jasper, IN? ▼
The 90th percentile AQI for the Jasper, IN metro area is 58, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 88 (Moderate).
How does Jasper, IN compare to other metro areas? ▼
The Jasper, IN metro has 67.2% good air days. Similar metros: Beaver Dam, WI (76.4% good), Bennington, VT (82.9% good), Billings, MT (86.7% 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.