What is the lead clearance value for windows according to EPA standards?

The lead clearance value for windows, as established by EPA standards, is 100 micrograms per square foot (μg/ft²). This specific threshold is set to ensure that lead dust levels in residential properties or child-occupied facilities are maintained at a low risk of exposure to children and other vulnerable populations. The standard reflects the need for safe environments, particularly in areas where children play or reside, as lead exposure can have serious health effects, particularly on child development.

Establishing the clearance value at 100 μg/ft² is significant because it helps identify when lead hazard control measures have successfully reduced lead dust levels to a point where the risk of exposure is minimized. Properties undergoing lead remediation processes must achieve this clearance level for windows and other surfaces, ensuring that they are safe for occupancy after lead abatement efforts.

Other proposed values, while they may represent past standards or regional guidelines, do not align with the current EPA standards and thus would be higher or lower than the effective threshold aimed at protecting public health.