Survey of the mutagenicity of surface water, sediments, and drinking water from the Penobscot Indian Nation

•Penobscot Indian Nation, Maine, U.S., drinking water mutagenicity was 337rev(L-eq)−1.•The Penobscot River water mutagenicity was 177rev(L-eq)−1.•The river sediment mutagenicity was 244rev(g-eq)−1.•Most samples of river water/sediment and drinking water were not mutagenic.•The aquatic environment of the Penobscot Indian Nation has no or low mutagenicity.