Abstract: PM_2.5 and PM₁₀ samples during summer were collected from four representative locations in development zone (A), urban area (B), and industrial zones (C and D) on the northern slope of the Tianshan Mountains. The concentrations of atmospheric particulate matter and 11 heavy metals, including Cd, Sb, and Pb, were analyzed. The methods of Enrichment Factor, Pearson correlation analysis, and principal component analysis were used to investigate the sources of heavy metal pollution in atmospheric particulate matter. The health risk assessment method was employed to evaluate the health risks of heavy metals in different regions and populations of the city. The results indicated that heavy metals Co, Cd, and Sb concentrations in atmospheric particulate matter were below 1 ng/m³ during the sampling period, while Mn, Ni, Zn, and As concentrations exceeded 15 ng/m³. The urban area exhibited the highest level of heavy metal pollution, while the development zone showed the lowest levels. The heavy metal content in atmospheric particulate matter correlated with local pollution sources, with the industrial zones having higher levels of Zn, As, Ni, Pb, and Cu compared to the development zone and urban area. In atmospheric particulate matter, V, Mn, and Co mainly originated from natural sources. At the same time, Ni, Cu, Zn, As, Cd, Sb, and Pb were influenced by human activities, with As and Cd showing moderate enrichment and significant human influence. The main sources of atmospheric particulate matter in summer in the city were mixed sources mainly composed of industry, coal burning and traffic exhaust, natural and dust sources, and non-exhaust traffic sources caused by tire or brake wear. The non-carcinogenic risk index for Mn in atmospheric particulate matter was the highest (0.299-1.46), and the carcinogenic risk for As and Ni was the highest, with PM_2.5 posing a higher risk level than PM₁₀.