Acute Respiratory Infection (ARI) was one of the main caused of death in toddlers in Indonesia with a contribution of 12.5%. In Palembang City, the monthly average of aRI cases in toddlers reached 3,150 cases in 2023, an increased compared to the previous year. This studied aimed to analyze the relationship between ambient air quality (NO₂, SO₂, CO, O₃, and PM₂.₅) and ARI incidents in…