Montreal Street Trees Thrive on Leaky Pipes
2025-08-24
Street trees in Montreal are surprisingly drought-resistant compared to their park counterparts, thanks to an unexpected water source: leaky pipes. A study analyzing lead isotopes in tree rings revealed that street trees draw water from old lead pipes, unlike park trees relying mainly on rainwater. Given Montreal's daily water loss of 500 million liters from leaky pipes, this explains the street trees' superior drought tolerance. This finding challenges the common assumption that park trees are healthier.