According to Title X, what is the acceptable lead concentration in soil?

The acceptable lead concentration in soil according to Title X is 400 parts per million (ppm). This standard is in place to ensure that the safety of environments where children may play is prioritized. Title X, which is part of the Residential Lead-Based Paint Hazard Reduction Act of 1992, aims to reduce the risks of lead exposure in residential properties, particularly for young children who are more susceptible to the harmful effects of lead.

The threshold of 400 ppm is based on research and analysis related to the health risks posed by lead ingestion and inhalation, especially in residential areas. This level takes into consideration various factors, including soil contact, potential lead dust, and the activities children engage in outdoors. Maintaining lead concentrations below this threshold is critical for public health initiatives aimed at preventing lead poisoning.

While other values exist for different contexts—such as micrograms per square foot for lead dust or parts per billion for drinking water—400 ppm specifically is established for lead in soil.