239 W Main St, Richmond, KY 40475 1 859 623 1000 info@richmond.ky.us Justice, Education, Industry. The City of Richmond was founded in 1798 by Colonel John Miller, a Revolutionary War soldier. According to tradition, Miller was attracted to the area by the good spring water and friendly Native Americans.
A microgram is a metric unit of mass that is equal to one thousandth of a milligram (mg). In other words, a microgram is one thousand times smaller than a milligram. Micrograms are a million times smaller than grams (g); one gram is equal to one million micrograms. A microgram is one of the smallest units of mass that is used. Many medications are prescribed using micrograms as their unit of measurement.
A micron is a unit of linear measure in the metric system used to measure distance from one point to another. The particles and contaminants that we are trying to filter out are far smaller than can be seen with the naked eye, magnifying glass or even a low powered microscope.