Need some advice on a high LAL and colony count on a GE portable R.O.. Here is where I am at first test result was Colony Count of > 600 CFUs
5.640 EU/mL drawn on 6/11. I disinfected with Minncare for 1 hour and repeated. Next result was 94 CFUs and 0.458 EU/mL drawn on 6/15. I disinfected with Minncare for 5 hours and repeated. Checked results today on website for lab so far the LAL is 0.108 EU/mL have not yet recieved Colony Count this was drawn on 6/22. Any advice or suggestions would be greatly appreciated.

How old are the membranes?? It may be time to replace them.

Need more info. how old is portable or when membrane last changed? Did you hi an lo pH clean before disinfect?

stumped,

Did the RO sit unused for a few days?

How is the product water conductivity/TDS and % rejection?

If the water quality hasn't decreased I would think your membranes are still good but became colonized. Your lab results so far look as if your disinfections are working.

Chuck

My machine is 28 months old with 2021 hours on it.
this is in an acute unit so is sometimes idle for long periods of time. I did do a high and low PH cleaning prior to disinfect. It does run once a day for 1/2 hour to disinfect the dialysis machine that is hooked up to it. Thanks everyone for the fast responses.

Also TDS and % rejection are good