CBP data indicates that there are more establishments categorized as construction businesses with between one and four employees in Riverside County zip codes than in any other category.
The following table shows how many mining, quarrying, oil and gas extraction businesses with between one and four employees were in Riverside County zip codes during the period from 2012 to 2016.
Mining, quarrying, oil and gas extraction businesses with between one and four employees in Riverside County (2012-2016)
Year
Total businesses
2012
11
2013
12
2014
10
2015
12
2016
15