Grand Isle, Louisiana Air Quality
Grand Isle has a median AQI of 48, earning an air quality grade of B+ — good air quality that ranks better than 17% of US cities. Air quality has been trending worse over the past decade, a concern for local residents and health officials. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2025, Grand Isle recorded 160 good air quality days (59% of monitored days) and 1 unhealthy days.
Population: 623 • County: Jefferson
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Quick Facts
| Current AQI | 18 — Good |
| Air Quality Grade | B+ |
| Median AQI (2025) | 48 |
| vs. U.S. Cities | Better than 17% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 1 |
| 10-Year Trend | ↓ Worsening |
| Data Source | EPA AirNow |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 30 Days
Current Pollutant Levels
Real-time data from EPA AirNow
AQI Trend (10 Years)
Air Quality Days by Year
2025 Air Quality Summary
Primary Pollutant Days (2025)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Grand Isle Air Quality
What is the air quality in Grand Isle today?
The current AQI in Grand Isle is 18, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Grand Isle getting better or worse?
Air quality in Grand Isle has been worsening in recent years. The median AQI rose from 42 in 2016 to 48 in 2025.
What is the most common air pollutant in Grand Isle?
PM2.5 is the primary air pollutant in Grand Isle, responsible for the most air quality-impacted days in 2025. Particulate matter can originate from vehicle exhaust, wildfires, and industrial emissions.
How many unhealthy air days does Grand Isle have per year?
In 2025, Grand Isle had 1 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 160 good days and 112 moderate days out of 273 days monitored.
What air quality grade does Grand Isle receive?
Grand Isle receives an air quality grade of B+, placing it better than 17% of US cities. This grade is based on a median AQI of 48 for 2025, derived from EPA monitoring data.
Air Quality Grade
Better than 17% of US cities
Nearby Cities
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National Rankings
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Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Grand Isle
Based on your area's air quality (median AQI: 48), we recommend these air purifiers to help protect your health indoors.
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Molekule Air Pro
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Blueair Blue Pure 211+
High performance for large rooms with simple operation.
Dyson Pure Cool TP04
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