Guidelines for Canadian Drinking Water Quality: Guideline Technical Document – Barium (English, HTML)

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Publisher-reported update

2021-12-01

Naturally occurring barium can be found in most types of rocks and can enter surface and groundwater by leaching and eroding from sedimentary rocks. A maximum acceptable concentration (MAC) for total barium in drinking water is 2.0 mg/L (2,000 µg/L).

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