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Every April, the Conservancy hosts a single-day watershed-wide event focused on removing litter, tires and other debris from regional waterways. This event brings together volunteers who work collaboratively to clean-up streamside sites, parks and open spaces throughout the watershed.
Since its creation in 2004, the Perkiomen Stream Clean-up has grown to become the largest single-day stream clean-up in the state of Pennsylvania with 1,770 volunteers participating in 2025!