Of course I don't *actually* know whether these tests work; I'd have to compare them to some other test to know. But it was good to have confidence that my water is safe to drink. It had been tasting funky and we weren't sure. But with the battery of tests included in this kit, you can find out if there are any major problems with your tap water.
The tests were fairly easy, and the instructions were straightforward. Just make sure to follow them, as there's no way to make the tests work otherwise!
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