Volunteers from ShoreRivers test for bacteria in the Corsica River at the CRYC Beach every week from Memorial Day through Labor Day. Testing is done on Thursday mornings so that data is published in time for people to make weekend plans for swimming in safe waters.
Weekly results are published on the ShoreRivers Website and on FaceBook.
Learn more about the bacterial monitoring program in 2025 for the Chester River Watershed (includes Corsica River) below.
In 2025, the CRYC testing site had the second highest pass rate in the Chester River Watershed. CRYC passed 80% of the tests in 2025.
In 2024, the CRYC testing site had the highest pass rate for the watershed that year.
Samples collected from CYRC failed less than 10% of the time in 2024 (only one fail), with the highest results peaking at 108 cfu in July, making it the top performing site on the Chester! The site did not fail following 48 hours of dry weather. This stretch of the Corsica is wide, deep, and fast moving. The surrounding land is a mix of agriculture, woodlands, marshland, and rural development.
