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Re:Arsenic in Some Bottled Water Brands at Unsafe Levels, Co... by cornstalks on Sunday June 23, 2019 @01:29PM (#20257164)
> I recently commissioned a lab test for my drinking water and the filters appear to be very effective, although it may be the case that my city water is already high quality and arsenic-free (for now).

The wording makes it sound like you only tested your filtered water. Seems like you'd want to test both the pre-filtered and post-filtered water to really know if your filters are "very effective."

Re:Arsenic in Some Bottled Water Brands at Unsafe Levels, Co... by oil25 on Sunday June 23, 2019 @01:34PM (#20257206)
I agree, but the test was pretty expensive (about $400) so I only opted to test the "filtered" output since that's what I end up drinking and cooking with. I would definitely like to do a comparison test in the future.
Re:Arsenic in Some Bottled Water Brands at Unsafe Levels, Co... by skuhn on Sunday June 23, 2019 @01:46PM (#20257311)
Testing your unfiltered water as a control to your filter is a good idea, but also you're still bathing in that water.

$400 seems quite high. There are much cheaper tests available, such as the National Testing Labs City Check test ($126 + return shipping) at https://www.purewaterproducts.com/watercheck/