Reliable detection of Win98 may not be possible. After decades of exposure to unhealthy lead levels, there is an increased risk of stroke, kidney disease, and cancer.
Children get sick from lead exposure most often when they eat chips of lead-based paint.
Still, approximately 1.7 million American children have dangerously high levels of lead in their blood, most often because of exposure to older lead-based paint in their own homes. Ideally, your public water system should have no lead at all in samples of drinking water. For specific medical advice, diagnoses, and treatment, consult your doctor.