Metro area air quality · 2025

Port St. Lucie, FL

Median AQI 41 (Good). 79.2% of monitored days rated Good across this metro's EPA monitoring network.

Compiled by PlainAirData · August 23, 2026

41
Median AQI: 79.2%
Good-air days: 0
Unhealthy days: 65%
Cleaner than US metros

Port St. Lucie, FL posted a 2025 median AQI of 41 (Good) with 79.2% Good days

According to the U.S. EPA Air Quality System, the Port St. Lucie, FL CBSA recorded a median AQI of 41 across 365 monitored days in 2025, with 79.2% 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 Port St. Lucie, FL CBSA's 79.2% Good-day share places it cleaner than 65% of US metros in 2025.
Closest median-AQI peer: Adrian, MI (69.3% Good, median AQI 41) is the closest nationwide median-AQI peer to Port St. Lucie, FL.
2020–2025 Good-day shift: Port St. Lucie, FL's Good-day share moved +4.6 points from 2020 to 2025 (median AQI -1).
Median AQI: Median AQI: 41

Aggregated from EPA Air Quality System (2025), 365 monitored days. EPA AQS →

The verdict

Port St. Lucie, FL's peak reading 74 stays in the lower max-AQI tercile on this extract. On the EPA scale the metro runs good, cleaner than the median US metro, with a median AQI of 41 and 79.2% of 365 monitored days in the Good band.

41
median AQI · Good: 79.2%
days rated Good: 65%
cleaner than US metros: 74
worst single reading

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

Port St. Lucie, FL metro's Good-day share fell from 86.3% to 79.2% between the 2024 and 2025 EPA annual releases, a change of -7.1 percentage points.

Port St. Lucie, FL's peak reading 74 stays in the lower max-AQI tercile on this extract. Signature read: peak AQI 74 (low tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 41 over 365 measured days in 2025 (Good / Good). The monitored-day split lands at 289 Good (79%), 76 Moderate (21%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 55; the highest single-day reading hit 74 (Moderate).

Across 2020–2025, Good-day share shifted +4.6 points and median AQI moved -1 (improving). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Adrian, MI (69.3% good, AQI 41); Albany-Schenectady-Troy, NY (67.7% good, AQI 41); Ann Arbor, MI (69.3% good, AQI 41).

Understanding AQI →

Air Quality Summary

Median AQI

Good

Good Days

79.2%

289 of 365 days

Max AQI

Moderate

Health Grade

Good

90th pct: 55

AQI Day Breakdown (2025)

Distribution of 365 monitored days across EPA AQI categories.

Good

289

79%

Moderate

21%

USG

Unhealthy

Very Unhealthy

Hazardous

Health Impact Assessment

Good

The Port St. Lucie, FL metro area's air quality is rated Good based on 79.2% 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 Port St. Lucie, FL metro compare?

How Port St. Lucie, FL compares

Compare against

Good-day share better than typical

Port St. Lucie, FL 79.2%

Adrian, MI 69.3%

Typical US metro 70.6%

Median AQI about typical

Port St. Lucie, FL 41

Adrian, MI 41

Typical US metro 41

Unhealthy days / yr better than typical

Port St. Lucie, FL 0

Adrian, MI 0

Typical US metro 1

5-Year Air Quality Trend

Air quality is improving in the Port St. Lucie, FL metro. Highest Good-day share: 2024 (86.3%, 315 of 365 monitored days).

Year	Good	Moderate	Median AQI	Max AQI
2020	273	93	42	96
2021	250	115	44	88
2022	287	77	42	108
2023	283	81	41	127
2024	315	50	40	71
2025	289	76	41	74

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Port St. Lucie, FL (41).

Adrian, MI

Median AQI 41 · 69.3% Good-day share

Albany-Schenectady-Troy, NY

Median AQI 41 · 67.7% Good-day share

Ann Arbor, MI

Median AQI 41 · 69.3% Good-day share

Bowling Green, KY

Median AQI 41 · 75.6% Good-day share

Brunswick, GA

Median AQI 41 · 74.3% Good-day share

Decatur, AL

Median AQI 41 · 78.4% Good-day share

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Port St. Lucie, FL'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

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

Alexandria, LA

0 unhealthy-or-worse days · median AQI 37

Frequently Asked Questions

What is the 90th percentile AQI for Port St. Lucie, FL? ▼

The 90th percentile AQI for the Port St. Lucie, FL metro area is 55, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 74 (Moderate).

How many unhealthy air days does Port St. Lucie, FL have? ▼

In 2025, the Port St. Lucie, FL metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 74.

What is the air quality in the Port St. Lucie, FL metro area? ▼

The Port St. Lucie, FL metro area has a median Air Quality Index (AQI) of 41, rated "Good." 79.2% of monitored days (289 out of 365) had good air quality in 2025.

Is air quality in Port St. Lucie, FL getting better or worse? ▼

Air quality in the Port St. Lucie, FL metro is improving across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2024 at 86.3% (315 of 365 days). Lowest qualifying Good-day share: 2021 at 68.5% (250 of 365 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.

How does Port St. Lucie, FL compare to other metro areas? ▼

The Port St. Lucie, FL metro has 79.2% good air days. Similar metros: Adrian, MI (69.3% good), Albany-Schenectady-Troy, NY (67.7% good), Ann Arbor, MI (69.3% good).

Data Sources

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