Concentrations of cadmium and lead in particulate matter in an industrial municipality of Boyacá, Colombia and its health implicationsIntroduction: the municipality of Nobsa is located in the Colombian department of Boyacá. Inside its urban area are located cement industries and open pit mines, which from their industrial or artisanal processes, generate particulate matter (PM) that may contain substances that affect health of their habitants. Objective: To determine cadmium and lead concentrations in particulate matter in urban area of Nobsa, Boyacá, identifying their possible health implications.Methodology: for four continuous days (24 hours each), in five points of urban area of Nobsa, PM monitoring was carried out, using Gil Air 3 personal sampling pumps in addition to real-time portable particle monitoring (Airbeam) equipment less than 2.5 microns (PM2.5). Concentrations of lead and cadmium were determined using Graphite furnace atomic absorption spectroscopy, by analyzing PM filters, which were obtained from the personal sampling pumps. Health implications were assessed by comparing file concentrations of the pollutants, against air quality guidelines of World Health Organization (WHO), in addition to estimate toxicity- hazard ratio for each metal.Results: The daily average concentration of lead, cadmium and PM2.5 were 0,002 µg/m3 (SD: ± 0,002), 0,213 ng/m3 (SD: ± 0,168) and 9,01 µg/m3 (SD: ± 2,91) respectively, for PM2.5 the highest hourly values were in the time slot from 4:00 to 8:00 amConclusions: daily values of lead, cadmium and PM2.5 did not exceed the annual standard established by WHO, however in the time slot from 0:00 to 8:00 a.m. the annual standard for PM2.5 was exceeded. Toxicity- hazard ratio did not present a risk from daily exposure to the two metals, however, a medium or long-term effect is not ruled out.