Wastewater recovery is important to any pressure washer. The EPA is cracking down with stringent rules and larger fines; you can't afford not to be recovering your wastewater. In addressing recovered wastewater, the EPA has different regulations and these are based on the type and amount of contaminants. In some cases, recovered wastewater can be discharged into a sanitary drain once confined. Rules governing this kind of removal come from the sewage authority where the wastewater will be received.
Another alternative is to use water containment system to pull through the wastewater into a containment tank for transport to your own facility for appropriate treatment, or to a treatment facility. But before transporting any wastewater, you should consider local laws relating to wastewater recovery and transporting of such materials and whether having a permit is mandated. You also have to take into consideration the amount of water that will be transported, disposal fees and what vehicle to use.
Using wash water filtration systems is the most economical and comprehensive option as these systems remove contaminants from the wastewater that has been recovered as you wash. A few of these systems eliminate sufficient contaminants that the water that has been filtered can be reused. The best aspect of this kind of a point-of-use filtration system is the fact that it lessens the amount of freshwater that needs to be moved to a site.