The county of Riverside has set up testing sites. Check out the video for more information. As more information becomes available we will update this post. Also you can see the most up-to-date information at the following Riverside County website. https://rivcoph.org/coronavirus
From the Riverside Health Department:
One of the most important ways we have to combat the spread of illness like coronavirus is through education and information from reliable sources. It’s vital that we provide science-based details about how the illness is spread, as well as updates on what health officials are doing to protect the health of residents of Riverside County.
Covid-19 Testing Locations as of May 7, 2020