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Since we care about water and the accuracy of the data that we are providing, we are doing what other people don't. We're going to tell you what our instrument’s detection levels are. Detection limits are the smallest amount of the element being tested that the ICP can see. For example, in a Fresh Water sample, we can find Calcium, Ca, at 3.349 ppb. That means we can tell you how much Calcium is in your water down to 3.3 parts per billion.