Metro area air quality · 2025

Vincennes, IN

Median AQI 36 (Good). 91.3% of monitored days rated Good across this metro's EPA monitoring network.

Compiled by PlainAirData · August 23, 2026

36
Median AQI: 91.3%
Good-air days: 0
Unhealthy days: 88%
Cleaner than US metros

Vincennes, IN posted a 2025 median AQI of 36 (Good) with 91.3% Good days

According to the U.S. EPA Air Quality System, the Vincennes, IN CBSA recorded a median AQI of 36 across 344 monitored days in 2025, with 91.3% rated Good and 0 unhealthy or worse. This is an annual metro comparison, not a live advisory.

Data source EPA Air Quality System (AQS)

Cleaner than US metros: The Vincennes, IN CBSA's 91.3% Good-day share places it cleaner than 88% of US metros in 2025.
Closest median-AQI peer: Atlantic City-Hammonton, NJ (82.2% Good, median AQI 36) is the closest nationwide median-AQI peer to Vincennes, IN.
2020–2025 Good-day shift: Vincennes, IN's Good-day share moved -2.4 points from 2020 to 2025 (median AQI +3).
Median AQI: Median AQI: 36

Aggregated from EPA Air Quality System (2025), 344 monitored days. EPA AQS →

The verdict

Vincennes, IN sits in the upper Good-day tercile among EPA CBSA metros on this site (91.3% of 344 monitored days). On the EPA scale the metro runs good, cleaner than most US metros, with a median AQI of 36 and 91.3% of 344 monitored days in the Good band.

36
median AQI · Good: 91.3%
days rated Good: 88%
cleaner than US metros: 93
worst single reading

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

Vincennes, IN metro's Good-day share rose from 87.2% to 91.3% between the 2024 and 2025 EPA annual releases, a change of +4.1 percentage points.

Vincennes, IN sits in the upper Good-day tercile among EPA CBSA metros on this site (91.3% of 344 monitored days). Signature read: 91.3% Good-day share (high tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 36 over 344 measured days in 2025 (Good / Excellent). The monitored-day split lands at 314 Good (91%), 30 Moderate (9%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 49; the highest single-day reading hit 93 (Moderate).

Across 2020–2025, Good-day share shifted -2.4 points and median AQI moved +3 (stable). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Atlantic City-Hammonton, NJ (82.2% good, AQI 36); Barnstable Town, MA (93.7% good, AQI 36); Bemidji, MN (79.1% good, AQI 36).

Best and worst city air quality →

Air Quality Summary

Median AQI

Good

Good Days

91.3%

314 of 344 days

Max AQI

Moderate

Health Grade

Excellent

90th pct: 49

AQI Day Breakdown (2025)

Distribution of 344 monitored days across EPA AQI categories.

Good

314

91%

Moderate

USG

Unhealthy

Very Unhealthy

Hazardous

Health Impact Assessment

Excellent

The Vincennes, IN metro area's air quality is rated Excellent based on 91.3% 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 Vincennes, IN metro compare?

How Vincennes, IN compares

Compare against

Good-day share better than typical

Vincennes, IN 91.3%

Atlantic City-Hammonton, NJ 82.2%

Typical US metro 70.6%

Median AQI better than typical

Vincennes, IN 36

Atlantic City-Hammonton, NJ 36

Typical US metro 41

Unhealthy days / yr better than typical

Vincennes, IN 0

Atlantic City-Hammonton, NJ 0

Typical US metro 1

5-Year Air Quality Trend

Air quality is stable in the Vincennes, IN metro. Highest Good-day share: 2020 (93.7%, 328 of 350 monitored days).

Year	Good	Moderate	Median AQI	Max AQI
2020	328	22	33	105
2021	320	38	36	108
2022	321	23	36	87
2023	313	43	39	126
2024	314	46	38	90
2025	314	30	36	93

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Vincennes, IN (36).

Atlantic City-Hammonton, NJ

Median AQI 36 · 82.2% Good-day share

Barnstable Town, MA

Median AQI 36 · 93.7% Good-day share

Bemidji, MN

Median AQI 36 · 79.1% Good-day share

Claremont-Lebanon, NH-VT

Median AQI 36 · 83.6% Good-day share

Crestview-Fort Walton Beach-Destin, FL

Median AQI 36 · 93.9% Good-day share

East Stroudsburg, PA

Median AQI 36 · 88.3% Good-day share

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Vincennes, IN's 0 (independent of median AQI).

Aberdeen, SD

0 unhealthy-or-worse days · median AQI 27

Aberdeen, WA

0 unhealthy-or-worse days · median AQI 22

Adrian, MI

0 unhealthy-or-worse days · median AQI 41

Akron, OH

0 unhealthy-or-worse days · median AQI 45

Albany, GA

0 unhealthy-or-worse days · median AQI 46

Albany, OR

0 unhealthy-or-worse days · median AQI 27

Frequently Asked Questions

How many unhealthy air days does Vincennes, IN have? ▼

In 2025, the Vincennes, IN metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 93.

What is the air quality in the Vincennes, IN metro area? ▼

The Vincennes, IN metro area has a median Air Quality Index (AQI) of 36, rated "Good." 91.3% of monitored days (314 out of 344) had good air quality in 2025.

Is air quality in Vincennes, IN getting better or worse? ▼

Air quality in the Vincennes, IN metro is stable across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2020 at 93.7% (328 of 350 days). Lowest qualifying Good-day share: 2024 at 87.2% (314 of 360 days).

What does AQI 36 mean for health? ▼

An AQI of 36 is "Good", air quality is satisfactory and poses little or no health risk. This is the best category on the EPA's AQI scale.

How does Vincennes, IN compare to other metro areas? ▼

The Vincennes, IN metro has 91.3% good air days. Similar metros: Atlantic City-Hammonton, NJ (82.2% good), Barnstable Town, MA (93.7% good), Bemidji, MN (79.1% good).

What is the 90th percentile AQI for Vincennes, IN? ▼

The 90th percentile AQI for the Vincennes, IN metro area is 49, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 93 (Moderate).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Vincennes, IN, 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, Vincennes, IN · 2020–2025 Accessed 2026-07-06