What are your TDS levels?

PufferMan

PufferMan

Member
So, I just got a TDS meter to test my water, and see how well my RODI unit performs. I thought it might be cool to see what everyone else's levels are around the area. List your location, RODI unit/how old your filters are, tap level, RO level, DI level. I'll start.

Lisle, IL
Spectrapure MPDI-90 / 3 months
Tap: 144 ppm
RO: 1ppm
DI: 0ppm
 
NE side of Naperville. The last time I tested tap I think it was 137 or so. 0 out of my RO/DI (Bulk Reef Supply 4 stage). I bought the unit used so I don't know how long the filters have left before replacement.
 
Mine go in at 850-1000 and come out at 0-3 3 is when I change my filter. The 850-1000 is the raw water I have the meter before any filter.
 
Elgin IL
Filter guys 5 stage/ 3 year old membrane 4-6 month old prefilters
Well water 300 in
after RO 1 out
I have a booster pump set at 95 psi going in this seems to really help.
 
Mine are almost identical to the OP.

130-140 in
0 out

5 stage from BRS running off of main water pressure. Been running for almost a year, going to change the media once output hits 3
 
I decided to pick up a cheap tds meter from ecrater.com for $18 and the my levels were

tap water 147ppm
ro 2ppm

I picked up a cheap 4 stage ro unit from ebay for like $80 and the filters are about 5 months old.
 
Added my results for reference.

Raw Water: 450
After Filter: 0-3

Plainfield well water
 
Well just hooked up my dual tds meter 1st one is after the 3 pre-filters but before the membrane is about 125 to 135 and the 2nd is after the membrane at 3 to 4. I think I'm going to get a DI hooked up next and hopefully bring the TDS down to ZERO. I just got the unit new so the filters are 2 to 3 months old.
 
West Rogers Park, Chicago. Inside a 100 year old building.

Vertex Puratek 100 GPD RO/DI. Unknown age of filters. I got this about 2 months ago, used, from a guy who used it for about six months, then did not use it at all for at least six months. So there was no water running through it for that period but it presumably remained wet inside. I did not change any of the filters. Livestock still alive and kicking. Not necessarily the smartest thing.

Tap: 142 ppm
After the two prefilters: 142 ppm (ie no change in TDS reading)
After the RO filter: 0 ppm
RO/DI: 0ppm
 
elmhurst. I think we get our water from the city.

TDS at tap-89
RO-starts at 40 and drops to 0-1 in 15 seconds
DI-0

Vertex.
 
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