
The Wallkill River's bright neon-green plea for help
August 26, 2016

Algae near the Carmine Liberta replacement bridge over the Wallkill River in New Paltz on August 26, 2016. (Photo by Jason West / Wallkill River Watershed Alliance)

Algae in the Wallkill River at New Paltz on August 26, 2016. (Photo by Jason West / Wallkill River Watershed Alliance)

Algae in the Wallkill River at New Paltz on August 26, 2016. (Photo by Jason West / Wallkill River Watershed Alliance)
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Water quality monitoring
Riverkeeper is the go-to source for information about the quality of the water along the Hudson River and its tributaries

Emerging and unregulated contaminants
Toxic chemicals can harm the health of people, wildlife, aquatic ecosystems

Invasive species
Protecting the Hudson includes defending it against outside threats