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What stages are important for water filters? Question
Many companies sell water filters for improving the composition of water received from city mains. There is a variety of models with different number and types of filter stages, and corresponding price differences.
I suspect not all of these stages are equally critical to most people. Probably, the manufacturers put in unnecessary stages to justify a higher price for the product and for marketing reasons. The stages may be redundant with each other, the filter stage itself may be overkill for what a normal residential user would need, the stages may be filtering out things that are harmless (but scary to misinformed consumers, such as fluoride), there may be diminishing returns on expensive filter stages.
What filter stages or combinations are important for an average residential consumer getting municipal water?
1 answer
What filter stages or combinations are important for an average residential consumer getting municipal water?
None.
Municipal water plants already do all that for you. They also have to test their water far more regularly than you are likely to, and have standards they must maintain. If something goes wrong and anything in their water is above the limit, they will tell you. That will include instructions as to what you can and can't do with the water safely. When the problem is corrected, they will flush the pipes and then tell you it's OK to use the water normally again.
Of course there are well-publicized outliers that you hear about way out of proportion to their occurrence, like the mess in Flint Michigan. But you asked about "average". That doesn't actually make much sense, so I answered for "nominal" or "typical".
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