Leach

Washington Aqueduct says much can happen as water travels to the consumer. Jacobus says old pipes and fixtures can leach metals. He says water treatment facilities were never designed to remove chemicals that are now showing up.

Source: tatoeba (12249490)

"This is the leach," said Kitty, pointing to a large, yellowish, upright wooden cylinder, which rested on some slanting boards, down the surface of which ran a brownish liquid that dripped into a trough.

Source: wiktionary

Heavy rainfall can leach out minerals important for plant growth from the soil.

Source: wiktionary

[T]he very wet winter will have washed much of the goodness out of the soil. Homemade compost and the load of manure we get from a friendly farmer may not be enough to compensate for what has leached from the ground.

Source: wiktionary