Mount Ephraim, New Jersey Air Quality
Mount Ephraim has a median AQI of 44, earning an air quality grade of A- — excellent air quality that ranks better than 31% of US cities. Air quality has been improving steadily over the past decade, a positive sign for residents. Ground-level ozone is the primary concern, typically peaking on warm sunny days due to vehicle and industrial emissions. In 2025, Mount Ephraim recorded 125 good air quality days (69% of monitored days) and 2 unhealthy days.
Population: 4,669 • County: Camden
Current AQI
Quick Facts
| Current AQI | 29 — Good |
| Air Quality Grade | A- |
| Median AQI (2025) | 44 |
| vs. U.S. Cities | Better than 31% |
| Primary Pollutant | Ozone |
| Unhealthy Days/Year | 2 |
| 10-Year Trend | ↑ Improving |
| Data Source | EPA AQS (historical) · AirNow (live) |
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 90 Days
Current Pollutant Levels
Real-time data from EPA AirNow
Local Air Quality Context
Air quality data for Mount Ephraim is sourced from the South Camden monitoring area, located approximately 3 miles from city center. This EPA-certified station continuously tracks ground-level ozone, the primary driver of air quality alerts in this area.
Mount Ephraim has relatively consistent air quality throughout the year without a strong seasonal peak. Air quality is primarily influenced by local traffic, industrial activity, and regional weather patterns rather than a single seasonal driver.
AQI Trend (10 Years)
Air Quality Days by Year
Mount Ephraim Median AQI by Year
Annual EPA air quality data for Mount Ephraim — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2025 | 44 | 125 | 2 | 168 | Ozone |
| 2024 | 44 | 235 | 4 | 115 | Ozone |
| 2023 | 50 | 184 | 7 | 211 | PM2.5 |
| 2022 | 48 | 197 | 1 | 108 | PM2.5 |
| 2021 | 49 | 188 | 4 | 120 | PM2.5 |
| 2020 | 46 | 219 | — | 87 | PM2.5 |
| 2019 | 51 | 173 | 5 | 126 | PM2.5 |
| 2018 | 52 | 166 | 5 | 140 | PM2.5 |
| 2017 | 52 | 167 | 14 | 143 | PM2.5 |
| 2016 | 52 | 165 | 9 | 136 | PM2.5 |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
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 Mount Ephraim Air Quality
What is the air quality in Mount Ephraim today?
The current AQI in Mount Ephraim is 29, rated "Good". Air quality is good — outdoor activity is safe for everyone today. Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Mount Ephraim getting better or worse?
Air quality in Mount Ephraim has been improving. The median AQI has dropped 8 points (from 52 in 2016 to 44 in 2025), a positive trend for residents.
What is the most common air pollutant in Mount Ephraim?
Ozone is the primary air pollutant in Mount Ephraim, responsible for 95 days (53% of monitored days) in 2025. Ground-level ozone forms when sunlight reacts with emissions from vehicles and industry, typically peaking on hot summer afternoons.
How many unhealthy air days does Mount Ephraim have per year?
In 2025, Mount Ephraim recorded 69% good air quality days (125 days) out of 180 monitored days. There were 1 Unhealthy for Sensitive Groups days and 1 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 168.
What air quality grade does Mount Ephraim receive?
Mount Ephraim receives an air quality grade of A-, placing it better than 31% of US cities. This is based on a median AQI of 44 in 2025, with 125 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 31% of US cities
Nearby Cities
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National Rankings
See how Mount Ephraim compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Mount Ephraim
Ozone is Mount Ephraim's primary pollutant. Standard HEPA filters don't capture ozone molecules — you need activated carbon or PECO technology to chemically break them down. We highlight those units here.
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