"Particulate matter," also known as PM, is a complex mixture of extremely small particles and liquid droplets. Particle pollution is made up of a number of components, including acids, organic chemicals, metals, and soil or dust particles. The size of particles is directly linked to their potential for causing health problems. The greatest concern is with particles that are 10 micrometers in diameter or smaller because those are the particles that generally pass through the throat and nose and enter the lungs. Once inhaled, these particles can affect the heart and lungs and cause serious health effects. We offer PM-10 and PM-2.5 sampling and weighing services and can add this component to any environmental sampling plan.