New Interactive Map Tracks Finger Lakes PFAS

Cornell students create a detailed baseline of water contamination for all 11 Finger Lakes in New York.

Updated on Oct. 15, 2026 in Geography

Isometric editorial illustration depicting glass sample vials and stylized lake basins, representing environmental water quality research in New York. — Cornell researchers released an interactive map detailing PFAS contamination levels across all 11 New York Finger Lakes following extensive water sampling. AI Illustration. Upload story photo >

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Does local water quality mapping increase your confidence in the safety of your water supply?

In October 2026, Cornell University researchers released an interactive map detailing PFAS contamination levels across the Finger Lakes region. The project, which synthesized data from over 500 water samples, identified specific contamination hot spots near airports and fire training stations.

Why it matters

This research provides a necessary baseline for tracking environmental per- and polyfluoroalkyl substances (PFAS) in New York. The effort directly responds to public demand for local data following recent federal regulatory shifts regarding water safety.

The study screened for 24 distinct PFAS compounds across all 11 Finger Lakes. While overall concentrations remain relatively low, the team identified specific sites exceeding state safety guidance values.

The players

Cornell University

An Ivy League research institution with extensive programs in water resources and environmental engineering.

New York State Water Resources Institute

A state-funded organization that supports research and management of water quality throughout New York.

New York State Department of Environmental Conservation

The state agency responsible for implementing environmental policy and protecting natural resources.

The details

The student research team collected over 500 samples from ponds, tributaries, and all 11 Finger Lakes to build their interactive map. These water samples were screened for 24 common per- and polyfluoroalkyl substances, which are a class of synthetic chemicals resistant to degradation. The resulting dataset helps pinpoint localized contamination occurring primarily near high-risk infrastructure such as airports and fire training stations.

Professor Helbling began receiving public inquiries about PFAS levels in 2023.
The student team collected their first water sample in 2024.
The interactive map and project findings were published in October 2026.

The Tech Race

This regional dataset marks a shift toward granular environmental monitoring in response to national prevalence trends noted by the Centers for Disease Control and Prevention. It provides the specific spatial evidence required to inform local remediation strategies compared to broader, state-level assessments.

Residents of the Finger Lakes region can access the interactive map to view contamination baseline data for local water bodies. The team plans to leverage this established methodology to investigate high-priority areas in other parts of New York state in the future.

The takeaway

The mapping project transforms broad safety concerns into actionable, localized data for the Finger Lakes. Readers should watch for the student team's subsequent expansion of this monitoring framework into additional New York regions.