Excess of chemicals found US water

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Discussion Overview

The discussion centers around the presence of excess chemicals, specifically chromium-6, in US drinking water and the implications for public health and safety. Participants explore the reliability of tap water, the effectiveness of water filters, and the regulatory standards surrounding contaminants.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants express concern about the safety of tap water, particularly in light of past incidents like the Flint lead scandal.
  • One participant mentions using a water filter but questions its effectiveness against chromium-6, referencing external sources that suggest filters may not remove this contaminant.
  • Another participant critiques the framing of reports on chromium-6, arguing that they may exaggerate the risks by comparing California's stringent public health goals to federal standards, which are significantly less strict.
  • A participant shares specific data about chromium-6 levels in their local water supply, indicating uncertainty about whether the contaminant was detected or not.
  • There is a mention of regulatory standards regarding hexavalent chromium in electronics, highlighting inconsistencies in how different materials are treated under environmental regulations.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the safety of drinking water or the implications of chromium-6 presence. Multiple competing views remain regarding the interpretation of data and the effectiveness of regulations.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about the effectiveness of water filters and the interpretation of regulatory standards. The reliance on external sources for data may also introduce uncertainty.

wolram
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Seems like the US is having a raw deal, have you checked your water is safe to drink?

https://www.sciencedaily.com/videos/0233de5148b63e6e2bd95b0fcb0daca8.htm
 
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I don't know, but after the whole lead scandal in Flint I've been drinking my tap water from a filter.
 
http://www.ewg.org/interactive-maps/2016-chromium6-lower-48.php

I drink water from a filter, but don't know if it gets rid of chromium-6...

...answer: no: http://www.pbs.org/newshour/rundown/getting-the-chromium-out-of-your-water/

The story is pretty misleading though (shocking, right?) as it is from an environmentalist group and utilizes a California "public health goal" that is 500x more stringent than the legal requirement of 10 ppb and 5,000x more stringent than the federal standard of 100 ppb (that's for all types of chromium). The headline that it "taints tap water of 218 million Americans" is misleading in that if you have a sensitive enough detector you are likely to find everything in tap water. The article argues that the CA standard was weakened by lobbyists, which is almost certainly true. But it is also almost certainly true that the "goal" was a ridiculous knee-jerk reaction to the Erin Brockovich incident...which itself may have been exaggerated, since the estimated peak concentration was only 20ppb (average; 1 ppb).

My county (Montgomery, PA) has an average of 0.2 and high of 2.6 ppb. My town's water authority didn't seem to be on the list, but I was able to google it: http://www.collegeville-pa.gov/sites/default/files/pictures/2014-WaterReport.pdf
Chromium-6 wasn't on it, but I'm not sure if that is because it wasn't detected or not.
 
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russ_watters said:
chromium-6

Hexavalent chromium is disallowed in new electronics under ROHS but you can have it on abundance on anything non-electronic. Under the ROHS rules about separable materials you can have an arbitrarily small amount of a substance and still fail. Then you have chromed bumpers and no-one cares? An lead acid batteries too.

BoB
 

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