Dear Andy: I would recommend contacting the following chemical suppliers: 1. AKZO; Clarks Summit, PA; 717-587-5131 2. Aquatec Chemical International; Potniac, MI; 313-334-4747 These phone numbers may be old, but you should still be able to contact the above companies. Both have assisted me with microorganism control in similar situations. Regards, Ted Stern Circuit Research Corp. Andy RJ McKean wrote: > > Looking for info. on the effects and measurables of micro-organism growth in rinse water. We have had a supplier mention this as a new problem occuring in Europe. > > A. McKean