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CDC’s National Surveillance Data (1997-2012)

CDC began collecting childhood blood lead surveillance data in April 1995. The national surveillance system is composed of data from state and local health departments. States maintain their own child-specific databases so they can identify duplicate test results or sequential test results on single children.

State child-specific databases contain follow-up data on children with elevated blood lead levels including data on medical treatment, environmental investigations, and potential sources of lead exposure. Surveillance fields for CDC's national database are extracted from state child-specific databases and transferred to CDC.

State surveillance systems are based on reports of blood lead tests from laboratories. Ideally, laboratories report results of all blood lead tests, not just elevated values, to state health departments. States determine the reporting level for blood lead tests and decide which data elements should accompany the blood lead test result. Because data collection methods vary among states, CDC does not provide data for analysis from the national database. If you are interested in analyzing blood lead surveillance data contact the Childhood Lead Poisoning Surveillance Program in the state of interest.

Programs regularly include records from previous reporting periods in their current submissions. Consequently, even though we are processing current data submissions, counts from previous years will also be augmented.


icon indicating data files Tested and Confirmed Elevated Blood Lead Levels by State, Year and Blood Lead Level Group for Children <72 months.
You may also Download Excel file [XLSX - 94 KB]

icon indicating PDF version of data National Chart of Children <72 months Tested and Confirmed Elevated Blood Lead Level Rates by Year [PDF - 46 KB]

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