Typical air vs. spike days
- Annual average PM2.5 (8.94 µg/m³) reflects usual daily exposure.
- Worst-day peak PM2.5 (29.70 µg/m³) is what filtration must handle during bad-air events.
Sections below reference one or both metrics on purpose — that is how HVAC vs. portable guidance differs for Jacksonville without contradicting EPA-aligned thresholds.
Local Pollen and Environmental Load
In the areas surrounding Bayou Meto, seasonal pollen and mold spores are the primary drivers of indoor air contamination. Pine and oak pollen are particularly heavy in this part of Pulaski County, often coating outdoor surfaces and quickly finding their way indoors through doors and windows. These large biological particles are easily caught by filters, but they also clog them quickly. When combined with the high humidity of an Arkansas summer, a loaded filter can become a source of musty odors if not replaced promptly.
HVAC Filter Recommendations
Because Jacksonville sees PM2.5 peaks exceeding 25 µg/m³, I recommend a MERV 13 pleated filter. This higher rating is necessary to capture the fine combustion particles and smoke that contribute to those peak pollution days. Additionally, because ozone levels hit a maximum of 0.0754 ppm, a filter with an activated carbon layer is highly effective at neutralizing gaseous pollutants and odors that standard filters miss.
- Filter Grade: MERV 13 with Carbon.
- Change Frequency: Every 60 days to maintain airflow.
- Pro Tip: Ensure the filter frame fits tightly; even a small gap allows unfiltered air to bypass the media.