What is a common lead dust measurement method recommended by the EPA?

Swab sampling is a commonly recommended method for measuring lead dust, especially in residential settings where lead-based paint may be present. This technique involves using a specified wipe to collect dust from surfaces, which can then be analyzed in a laboratory to determine the concentration of lead.

The effectiveness of swab sampling lies in its ability to provide a direct measurement of lead contamination on surfaces where people, particularly children, may be exposed. The method is standardized and guidelines are provided by the EPA to ensure consistency in sampling and testing procedures.

In contrast, visual inspection does not provide quantitative data about lead levels, making it less reliable for assessing actual contamination. Indoor air testing measures airborne lead particles, but it may not account for lead dust accumulation on surfaces, which can be a primary source of exposure. Water testing, while important for assessing lead levels in drinking water, does not pertain to lead dust in the environment. Therefore, swab sampling stands out as the most appropriate method for accurately measuring lead dust as advised by the EPA.