GRASSY NARROWS, Ont. -- NDP Leader Jagmeet Singh says he would ensure every Indigenous community has clean drinking water, with a $1.8 billion price tag.

He says it is a firm commitment to remedy an injustice.

There are currently 56 long-term boil water advisories on reserves across the country.

Singh points to an estimate from the parliamentary budget office that $1.8 billion is the minimum capital investment to meet First Nations' drinking water needs.

The NDP leader was in Grassy Narrows, a northern Ontario First Nation that has been dealing for decades with mercury poisoning from contaminated water.

Singh said an NDP government would immediately spend $19 million to fund a mercury poisoning treatment centre in the community.