Frequent Questions

When viewing MCLs, documents typically state something similar to "long-term exposure." Is there a specific amount of water consumed per day over a specific period of time that the statement represents?

Long-term exposure refers to 2 liters per day over a 70 year lifetime.  This value represents the estimated 90th percentile intake by adults of direct and indirect water from public drinking water supplies. Indirect drinking water is the water used to make tea, coffee, reconstituted juices and soups. It does not include cooking water that is discarded before serving the food.

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