Homes and apartments built before 1960 and some built as late as 1978 are likely to contain lead paint, which was often used on doors, trim, window trim and painted plaster walls, Asera said.
Lead paint is safe until it starts to peel, crack or wear, which creates hazardous lead dust, chips and fumes that can cause lead poisoning.
Lead poisoning can damage many parts of the body, including the brain, nervous system, kidneys and blood system, according to Asera.
Children and pregnant women are particularly sensitive to lead poisoning.
People who wish to apply for the city's free lead paint removal program must meet income requirements and live in properties built before 1978 that are in the downtown Concord and Monument Boulevard areas.
Preference will be given to households with children under 6 years old.
The program includes a free inspection of the property by a licensed lead paint assessor and removal of any lead hazard that is found by repainting walls, replacing window trim and other improvements, Asera said.
For information about the program, contact the Lead Hazard Control Hotline at (925) 671-3318.