The Hopi Tribe is seeking $20 million from the federal government to clean up arsenic in drinking water.
In the Hopi communities of First and Second Mesa, naturally occurring arsenic levels in drinking water exceed federal limits by as much as four times.
Arsenic has been linked to cancers and circulatory problems.
Hopi water director Lionel Puhuyesva says the tribe decided to sue the government, rather than ask Congress for money.
