While it is true that there can be a few plumbing issues that you easily figure out yourself, it is best to have a number that you can call, like that of this reputable Salt Lake City Plumbing company.
If the problem happens to be as simple as it looks. For instance a clogged toilet. It should help to know what to do to fix the problem. Before calling a professional plumber, you might want to look into the issue yourself. You can either use a chemical based liquid or use a plunger.
A household should ideally have a plunger, in case of emergencies. A plunger could easily be available in a hardware or home store. Attempt to fix the problem with the plunger by pushing the plunger towards the drain of the toilet bowl. Push the handle with force and repeatedly, if needed. This will help whatever is in the way to let the standing water go down.
You might want to observe after several pumps if the water level should go down. If it does then what you did was successful. If not, give it a few minutes and try the process all over again. You may also want to try to use chemical during the next attempts. If the problem persists, make sure you call a professional plumber.