FYI

Ghazanfar Ghori · Post by **Ghazanfar Ghori** » Thu Aug 19, 2004 3:01 pm

A chemical that will be added to D.C. and Northern Virginia drinking water next week will produce a "noticeable reduction" in lead within a year, but it could be longer than that before some homeowners can stop using filters, an Environmental Protection Agency official said yesterday.

The colorless and tasteless chemical, <strong>phosphoric acid</strong>, coats the inside of plumbing to prevent lead from leaching into drinking water. It has been tried since June in a section of Northwest Washington. The EPA considers the test successful because there were no major problems with rusty water or elevated bacteria readings, two possible side effects.

RTRJR · Post by **RTRJR** » Thu Aug 19, 2004 4:30 pm

Phosphate test kits ready folks?

But my office tank was subject to high (up to 3 ppm, more often ~2) and did not turn into algae heaven. Unless of course I neglected to add nitrate, then it greened up quite well.

fredyk · Post by **fredyk** » Thu Sep 09, 2004 9:55 am

Mike Collins, at Arlington county, said tap water is 3mg/l.

Mark

Ghazanfar Ghori · Post by **Ghazanfar Ghori** » Thu Sep 09, 2004 10:16 am

Wow. People will have to keep on top of it with
Nitrate dosing to help suck some of that out.

Howard · Post by **Howard** » Fri Sep 10, 2004 12:45 am

Has anyone studies the Redfeild Ratio?
This is what I'm using as my control

RTRJR · Post by **RTRJR** » Fri Sep 10, 2004 9:32 am

Re: the Redfield Ratio, for an introduction, see:

http://aslo.org/meetings/carbon2001/kar ... ript3.html

Or just Google for more FW info.

FYI

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