Gross Beta Particle Activity measures radioactivity from beta-emitting particles in water. Sources include nuclear facilities and certain minerals. It increases cancer risk.

Gross Beta Particle Activity is a measure of total beta radiation in water, originating from both natural and human-made sources. It's detected using specialized radiation counters. While this test can't identify specific radioactive elements, it serves as an important screening tool. If levels exceed EPA limits, further analysis is required to determine the exact radionuclides present. Common sources include nuclear facilities, certain industries, and naturally occurring minerals in soil and rock.