Health of the watershed: Data maps & rankings The maps below provide a general snapshot of the most current available data from HVA’s science teams, our partners, and environmental agencies at the local, state and federal level. Click on any image to enlarge Overview of wildlife corridors, connected forests and protected lands Biodiversity ranking of local subwatersheds. Darker green = greater diversity of species. Which subwatersheds are most valuable and in need of PROTECTION? What are our most – and least – disturbed waters? Darker blue=less impacted. Which waters are most – and least – susceptible to climate change impacts? Darker blue=least susceptible. What lands in our region are most – and least – ecologically stable? Darker green=more stable Which forests are more likely to remain healthy and survive strong storms or other impacts? Darker green=more resilient. Which regions are most impacted by development (have the most pavement, rooftops, etc.) and thus more susceptible to runoff pollution? Red/orange=most developed.