In one study conducted at the BNSF Railway Hobart Railyard in Los Angeles, the California Environmental Protection Agency estimated that residents living near a railyard experienced a higher risk of carcinogen exposure.

Living next to a train track in 2026 involves two primary health concerns: air quality and noise pollution. Busy freight lines often use diesel locomotives, which emit fine particulate matter (PM2.5​) and nitrogen oxides. Long-term exposure to these pollutants is linked to respiratory issues and an elevated risk of cardiovascular disease. Furthermore, the noise from passing trains—especially at night—can reach levels between 80 and 115 decibels, significantly higher than the 55-decibel residential standard. This chronic noise exposure can lead to "sleep fragmentation," which elevates cortisol levels and increases the risk of hypertension. However, modern electric passenger lines are much cleaner and quieter. If you are considering a home near tracks, the health impact depends heavily on the distance (risks drop sharply after 500 feet) and the frequency of heavy diesel freight traffic. Many urban residents mitigate these effects by using high-quality HEPA air purifiers and installing soundproof, double-paned windows to protect their sleep cycles.