5 in 1 Water Quality Test Strips | Hach USA - Overview
2017-7-17 · water quality. Note that water test results are usually presented in milligrams per liter (mg/L) or micrograms per liter (µg/L). For example, a water test might indicate that the water contains 6 mg/L nitrate, meaning that a liter of water contains an average concentration of 6 milligrams of nitrate. Note also that one mg/L is equivalent to one part per million (ppm).
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