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Contaminant Level (Environmental Glossary)

Contaminant Level: A contaminant level is a relative measure of how much of a contaminant is present. Contaminant levels are expressed in concentrations such as parts per million (ppm), parts per billion (ppb), milligrams per liter (mg/l), or micrograms per liter (μg/l).

_ ស្វែងរកឬបកប្រែពាក្យផ្សេងទៀតនៅប្រអប់នេះ៖
_ខាងក្រោមនេះជាសៀវភៅនិងឯកសារសម្រាប់ការងារនិងរៀនគ្រប់ប្រភេទ៖
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