Aluminum discharge surges to dangerous levels upstream

July 6, 2026

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The wastewater treatment plant upstream released aluminum at 1,800 times its permit limit through 2024, and discharge remains double the allowed level into 2025. Aluminum is a gill poison — it binds to fish tissues with the same lethal mechanism that acid rain brought to New England streams in the 1980s, suffocating respiratory surfaces from the inside.

In July heat, when dissolved oxygen is already scarce and water temperatures push stressed fish toward metabolic collapse, there is almost no margin left. The combination of toxic metal load and heat stress may be keeping the stream in a state where recovery is difficult even in cooler months.

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