1,2,4-Trichlorobenzene is an industrial chemical used in solvents and pesticides. It enters water from factory discharges and can damage the liver and kidneys.

1,2,4-Trichlorobenzene is a synthetic organic compound primarily used in chemical manufacturing. It can enter drinking water sources through industrial waste discharges or leaching from contaminated soils. This chemical is typically measured in parts per billion (ppb) using gas chromatography. While banned as a pesticide in many countries, it's still used in some industrial processes. Its presence in water can be reduced through activated carbon filtration or air stripping techniques. Regular monitoring is crucial to ensure levels remain below regulatory limits.