The term specific gravity, symbolized sp gr, refers to the ratio of the density of a solid or liquid to the density of water at 4 degrees Celsius. The term can also refer to the ratio of the density of a gas to the density of dry air at standard temperature and pressure, although this specification is less often used.
Households in Columbia, MD have a median annual income of $100,849, which is more than the median annual income in the United States. Look at the chart to see how the median household income in Columbia, MD compares to that in it's parent locations. Dataset: Source:
Washington Family Income. The ACS 1-year survey shows that the median family income for Washington was $76,954 in 2015. Compared to the median US family income, Washington median family income is $8,694 higher. Like the median household income numbers, 2016 family income data will be released in September of 2017.