What is the ALARA threshold for arsenic in water?

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What is the ALARA threshold for arsenic in water?

ALARA for arsenic in drinking water means keeping arsenic levels as low as reasonably achievable through feasible treatment and monitoring, due to its toxic and carcinogenic nature. The widely accepted threshold used to guide this is 0.01 mg/L, which is equivalent to 10 micrograms per liter. This value aligns with international guidelines and regulatory limits that drive action to reduce exposure. Among the options, 0.01 mg/L is the best fit because it matches the standard drinking-water limit for arsenic; the other values—0.1 mg/L, 1.5 mg/L, and 2.4 mg/L—are much higher and would not represent the low-exposure goal that ALARA aims for.

ALARA for arsenic in drinking water means keeping arsenic levels as low as reasonably achievable through feasible treatment and monitoring, due to its toxic and carcinogenic nature. The widely accepted threshold used to guide this is 0.01 mg/L, which is equivalent to 10 micrograms per liter. This value aligns with international guidelines and regulatory limits that drive action to reduce exposure. Among the options, 0.01 mg/L is the best fit because it matches the standard drinking-water limit for arsenic; the other values—0.1 mg/L, 1.5 mg/L, and 2.4 mg/L—are much higher and would not represent the low-exposure goal that ALARA aims for.

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