Quite helpful to the RVer, RV dump stations receive dirty and used waste water from your holding tank or other device that acts in a similar manner. The stations dump the contents according to laws and regulations into approved disposal systems. Dump stations may be free or charge a small fee and you can find locations in the 50 states, Canada and around the globe.

Whether your travels take you to one state or across the country, you can find free dumping stations throughout the nation. For instance,
Flying J is a chain of gas stations that provide showers, a game room, lounges and sit down meals from partners like Denny's. The Flying J is well known in the truck and RV communities for these and other conveniences, such as dumping.
Until recently, the dump station at these facilities was free but the company decided to impose a $5 or $10 charge, depending on whether or not you have a membership card. While many RVers are not happy about this change, the convenience might still outweigh the fee as the Flying J has locations in Canada and most of the 50 states.
Sometimes when you sit for an extended time, perhaps boondocking for the winter, you don't want to pack everything up in order to drive to a dump station. If you are lucky the dump station will come to you in the form of the honey wagon.
One of the nice things about this is that the driver does all the hooking up, so you don't have to mess with the hose or the smell. Of course, depending on your location you can pay upwards of $25, if not more.
RV dump stations exist along many of the main highways that cross the United States of America. Off of the Alabama Interstates 10, 20, 59, 65 and 85 you can find a number of places to empty your waste. Near various parts of Interstates 5, 8, 10, 15, 80, 210, and 880 in California, dump stations await your arrival.
You may find it easy to get to dump stations from Michigan Interstates 69, 74, 94, and 96 or when traveling along Nevada Interstates 15, 80, US 95 and NV 373. When you want to make your way out East, Pennsylvania Interstates 70, 76, 78, 80, 81, 90, 276 offer many public dump stations for you to use.
RV dump stations exist for your convenience so it is important to keep them clean and not abuse their services. When these problems occur, it causes businesses to charge fees or stop operating as a dump site, which ruins it for everyone. Next time you have to lighten your load and dispose of your waste, be considerate as only a few free sites remain.