OK,
I may go too far but recently I installed:
- under sink RO (Reverse Osmosis) filtration system:
- carbon shower head filter for each on shower head:
- two stages (sediment and carbon) whole house filter;
The results are:
- city water: Ph = 8.3, TDS = 150 – 200;
- after whole house filter: Ph=7.9, TDS ~ 100:
- RO filtered water: Ph=7.4, TDS=0:
Bottled water (Poland Spring) has Ph=8.0 and TDS = 70
(not too far away from produced by whole house filter).
TDS (Total Dissolved Solids) measured with HM Digital meter
and Ph – Hanna Instruments, PHEP-3
After only two weeks of use 5 micron sediment paper filter already
looks too rusty.
So, each filter does its job. Yes, in some cases filters may create
bacteria related problem. If this case I’ll add UV (Ultra Violet) disinfector
to my whole house filtration system.
As far as chlorine (and in some cases fluoride) goes believe it or not
the main problem is not a drinking water but taking shower.
Hot water coming out from shower had quickly cools down and releases
a lot of dissolved gases. This creates a very nice gas chamber and
inhaled chlorine is many times more toxic then consumed with water.
For those who interested in under sink filtration system should seriously
consider RO system. RO filters are more expensive then simple carbon
filters but they are doing much better filtration job
(check measurements results above).
- Vitaliy
PS.
I am not a water/plumber expert, I am electronic design engineer.