RO not working in a certain area of town

I’m having issues in a neighborhood that the TDS is starting out in our normal range of 550+ but is only dropping to 135 TDS after the RO. I’ve had this happen multiple times. Once I leave the area and head to the next job it’s back to normal 550+ dropping to 30’s. Any ideas what would cause this? Thanks.

Probably not enough pressure BEFORE the RO. RO needs certain pressures to function properly.

https://shopwindowcleaningresource.com/water-fed-poles-systems/pumps.html

Sorry for the spamming of messages but my house has high pressure and about 120 TDS and with my system that takes my TDS down to 0 or 1 with just RO.

Same TDS (120-130) a few miles away but lower pressure I get 25-30 after RO because of pressure differences.

When’s the last time you changed out your prefilter?

This scenario sounds familiar. Part of town with higher incoming tds plugs up the prefilter. Then you take it over to an area with a lower tds and find out that the prefilter is plug up and not allowing the same amount of flow through.

Thanks for the ideas. New prefilter about a week ago. I am running a booster pump so I don’t think pressure is the issue but will throw a gauge on the next time I’m in the area. I did notice that there is a city well just down the street.