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Be careful with bright coloured dye, says EPA

Fluorescein is non-toxic but very concentrated so even where it doesn’t affect the environment, it can still cause problems by diverting EPA investigators from more serious pollution.

A series of incidents that turned creeks and stormwater drains bright blue, green or orange has prompted a call to plumbers and other tradies to be extra careful with the coloured marker dye they use in their work.

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