Looks like your TDS could be anywhere from 156 to 299 according to the water quality report. 299 is on the high side. The only way to test the TDS of your tap is to use a TDS meter. TDS can vary according to time of year & whether the city is flushing lines in your area or not. If you wish to test the TDS coming out of your tap, you should be able to score a small handheld TDS meter at one of the larger home centers or even Wal Mart. I found one at Wal Mart in Vernon in the RV/camping aisles & I think it cost less than $20. Can Tire may have them too. Small price to pay to confirm your TDS. Pressure guages can also be had for about $20 at Princess Auto or other hardware outlets, although by the sounds of it, your water pressure is pretty good. As mentioned, a decent RODI unit will have at least one pressure guage to help monitor when you may need to change one of the filters. I installed a second pressure guage so I can compare the source water pressure with the pressure before the RO membrane. This pressure differential will creep up over time & give you a great indication that a sediment filter is in need of changing.
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