Measuring river health
This report card focuses on the three mainstem rivers divided into upper and lower reaches:
- Upper Sudbury (Westborough to Framingham)
- Lower Sudbury (Framingham to Concord)
- Upper Assabet (Westborough to Stow)
- Lower Assabet (Stow to Concord)
- Upper Concord (Concord to North Billerica)
- Lower Concord (North Billerica to Lowell