After the nuclear plant in Japan failed in 2011, nuclear waste was released into the surrounding groundwater and ocean. How did this impact the surrounding human population?

The nuclear waste leaked into groundwater, and exposed humans to radiation that could potentially cause cancer.
The nuclear waste leaked into the ground and stayed in that location, affecting only humans who farmed or otherwise disturbed the soil.
The nuclear waste leaked into the sea and affected those exposed to seawater, but did not affect those on land.
The nuclear waste was not radioactive; therefore it did not affect the human population.