Micron’s Wastewater Plan: A Hidden Threat to Lake Ontario

Onondaga County is planning a huge new plant that will treat millions of gallons of wastewater from Micron’s chip factories. The project could cost between $1. 4 billion and $2. 6 billion, and the county’s design‑build‑operate process keeps most of the decision‑making away from public scrutiny. Residents worry whether Micron will pay for all the work or if taxpayers will shoulder part of the bill. They also fear that harmful chemicals could still reach Lake Ontario, which supplies drinking water for hundreds of thousands of people. Micron will use many per‑ and polyfluoroalkyl substances (PFAS), also called forever chemicals. Even tiny amounts of PFAS in drinking water can cause serious health problems, such as thyroid disease and cancer. Industry says short‑chain PFAS are safer, but scientists disagree: they can travel farther in water and still harm wildlife. The EPA says the safest level for PFAS is zero, yet Micron’s wastewater will be treated first with methods that do not remove these chemicals.

The county’s consultant recommends a basic biological treatment followed by ultraviolet light. This approach will leave most PFAS in the water, sludge, or air. Only when Micron’s second factory opens will half to two‑thirds of the waste go through more advanced filters that can capture PFAS. Until then, some toxins could spill into the Oneida River and eventually Lake Ontario. State regulators have not set strict limits for PFAS in the river. The permit allows a “action level” of 10 nanograms per liter for two PFAS types, but exceeding it only triggers a review, not enforcement. In contrast, the state has tight limits for mercury and other pollutants. Monitoring is limited to four times a year and may miss many PFAS present in semiconductor waste. Other regions have shown better solutions. For instance, Micron’s new plant in Boise uses a zero‑liquid‑discharge system that keeps almost all PFAS from entering waterways. Communities in Central New York can push for similar technology and stronger monitoring to protect local ecosystems and public health.

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