Chlordane is a banned pesticide that persists in soil and water. It was used for termite control and agriculture. Chlordane causes nervous system and liver damage.

Chlordane, banned in the U.S. since 1988, remains a concern due to its environmental persistence. This synthetic pesticide can enter drinking water through soil runoff from past agricultural use or termite treatments. Chlordane binds strongly to soil particles and can remain in the environment for decades. It's typically measured in water using gas chromatography. While no longer in use, its long-lasting nature means it may still be detected in some water sources, highlighting the importance of ongoing monitoring and treatment efforts.