My wife's been looking into arsenic removal systems for our house.
We tested the water and have pentavalent arsenic in it exceeding the new
She's got it down to Purolite's Arsenix system and ResinTech's
ASM-10-HP (an anion exchange system). She was wondering if anyone out
there had opinions about which one was better. The former says their
media last 3 years, the latter 5, but she's finding none of the vendors
who actually install the stuff warrantee either out nearly that far.
We're on well water, so we have no other authority to take the complaint
When we moved in 6 years ago, it tested just under the old standard by a
hair, so it's obviously over by the new standard.
The old standard of 50 parts per billion was in force for about a zillion
years. The new standard, 10 parts per billion, has as much science behind it
as did the ban on silicone breast implants.
If your water is below 50, save your money.
My wife fills empty soda bottles with tap water,
and stores 'em in the fridge....tastes just like 'bottled".
But seriously folks;
Unless your water TASTES terrible, I wouldn't
spend the $$$ on filtering systems.
Well, that's overly simplistic, too. :(
There are many contaminants (mineral and/or biotic) that have no taste
or odor but are serious health risks, so relying solely on taste or
smell isn't sufficient guarantee.
If it's a public water system there's at least a reasonable chance
it's pretty good at least in the developed countries. If it's a
private well, testing should be done on a periodic basis -- how
frequently is often enough depends on well location, surroundings,
I don't konw about the rest of it, but this last sentence doesn't
compute. For example, maybe they tried for the lower value but
compromised on the earlier higher value. Maybe there were other
efforts to lower it but they failed.
The notion that things must have been done right the first time, so
any other way isn't right, is not valid.
I agree that often science gets left out and political pressure takes over,
this usually creates standards that allow more toxins and/or pollutants than
science would like, not the other way round. This is usually because the
chemical companies or other vested interests have the lobbyists working on
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