Rain, Fog and Runoff water pollution has increased by urbanization and industrialization. Rural areas are being converted to urban areas continuously and unplanned industrialization is taking place. Fumes and gases from factories pollute the air. Acidic gaseous oxides liberated by the chimneys of the factories cause acid rain. Acid rain causes soil and water pollution and damages historical monument. Hot water liberated by many factories affects life under water and cause water pollution. Thus, urbanization and industrialization have leads to various types of pollution. This pollution can be checked by enforcing strict laws against the polluters. In this book focus on the Physico-chemical analysis of Rain, Fog and Runoff water samples collected from the various sites. It is useful for B.Tech, M.Tech and Ph.D. students in the field of Environmental pollution and sustainable studies. Hope this book can give better understand regarding the worldwide Rain, Fog, and Runoff water pollution.