Table 1. Risk classifications based on blood lead concentration (PbB)a.
| Class | Blood Pb (μg/dL) | Comment |
|---|---|---|
| IA | <5 | Not considered to be lead-poisoned |
| IB | 5-9 | Not considered to be lead-poisoned; potential cognitive impairment. |
| IIA | 10-14 | If many children in this range, community-wide childhood lead poisoning prevention activities triggered. Children in this range need frequent screening. |
| IIB | 15-19 | Nutritional and educational interventions and more frequent screening are necessary. If blood lead level persists in this range, an environmental investigation and intervention should be performed. |
| III | 20-44 | Environmental evaluation and remediation, and a medical evaluation are needed. Pharmacologic treatment of lead poisoning may be necessary. |
| IV | 45-69 | Medical and environmental interventions are needed, including chelation therapy. |
| V | >70 | This is considered to be a medical emergency. Medical and environmental management should begin immediately. |
a
Modified from the CDC statement on preventing lead poisoning in young children (1991)