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Regulations: Lead Hazard Investigator

In Wisconsin, a person must be certified to work with lead-based paint.


Initial, Renewal


A lead hazard investigator certification is for a person who does lead hazard screenings, lead risk assessments, lead-safe investigations, and lead clearance. They also offer ways to reduce specific lead hazards. They don’t use X-ray fluorescence devices or do lead inspections.


Two years. A one-day refresher training is required every two years to renew.


$325 for two years. State and local government workers don’t have to pay the fee.


You must be 18 years of age or older and meet one of the following:

  • Have a bachelor’s degree and one year of related experience.
  • Have an associate degree and two years of related experience.
  • Have a high school diploma or equivalent and three years of related experience.
  • Have professional certification as an industrial hygienist, professional engineer, or registered architect, or in a related professional engineering, health, or environmental field, such as safety professional or environmental scientist.
  • Be a registered nurse or registered sanitarian and be employed by a health department that provides oversight of the individual’s activities.

You also must complete an initial one-day lead sampling course followed by an initial two-day lead hazard investigation course.

See Wis. Admin Code ch. DHS 163, subch. II, Certification of Persons to Perform Lead-Safe Renovation, Lead Hazard Reduction, or Lead Investigation Activities. You must pass a state certification exam within six months after completing the first training course.

Last revised June 19, 2023