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			 Thats acceptable for your system. The RO works at about a 98% efficiency. 
		
	
		
		
		
		
		
	
		
		
	
	
	If you wanted to bring it down to 0, as many do, then u have to add a DI (dionization) cartridge. Here in Surrey we have about 12-15 ppm water and I run an RO/Di system for 0 TDS. The lower your ppm, then the less work the DI portion has to do. The DI, expensive stuff, lasts longer.  |