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Gain a clear understanding of ppm and mg/L, their definitions, differences, and conversion. Discover how these units are applied in different industries and contexts, particularly in measuring water pollutants and complying with water quality standards.
The endpoint concentrations for regulated toxic substances under the risk management program rule (40 CFR Part 68 Appendix A) are listed in units of milligrams per liter (mg/L). Is this equivalent to parts per million (ppm)? No, mg/L is not always.
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milligrams per liter (mg/L) A measure of the concentration by weight of a substance per unit volume. In reporting the results of water and wastewater analysis, mg/L is preferred to the unit parts per million (ppm), to which it is approximately equivalent.
If more than 10% of tap water samples exceed the action level, water systems must take additional steps. For copper, the action level is 1.3 mg/L, and for lead is 0.015 mg/L.
Instant free online tool for milligram/liter to part/million (ppm) conversion or vice versa. The milligram/liter [mg/L] to part/million (ppm) conversion table and conversion steps are also listed.
Mg/L is a measure of density. Get more information and details on the 'mg/L' measurement unit, including its symbol, category, and common conversions from mg/L to other density units.
General guidelines for classification of waters are: 0 to 60 mg/L (milligrams per liter) as calcium carbonate is classified as soft; 61 to 120 mg/L as moderately hard; 121 to 180 mg/L as hard; and more than 180 mg/L as very hard.
Free online concentration - solution converter - converts between 11 units of concentration - solution, including kilogram/liter [kg/L], gram/liter [g/L], milligram/liter [mg/L], part/million (ppm), etc.
Both mg/L and ppm are used to express the concentration of a substance in a liquid solution. While mg/L represents the number of milligrams of a substance per liter of solution, ppm indicates the number of parts of a substance per million parts of the solution.