There are 256 Pool & Spa Services in Washington, serving a population of 7,169,967 people in an area of 66,439 square miles. There is 1 Pool & Spa Service per 28,007 people, and 1 Pool & Spa Service per 259 square miles.
The state of Washington is ranked 43rd in Pool & Spa Services per capita, and 35th in Pool & Spa Services per square mile.