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and also for recreational water (i.e. boating lakes, rivers etc.)

The link below has the EU (European Union) drinking water standards from 1998. Escherichia coli should be 0 in 250 ml; total colony count at 22 degree C less than 100 per ml.

This is more strict than the WHO standards that do not specify how many bacteria can be present.

For "bathing water" (recreational), there are no true standards, but water can be given a rating. It would be impossible to test all lakes, rivers, and other places where people could dive in! Instead, a country will usually test the water quality once a year, and rate it. E.g. To be qualified as "excellent" there should be less than 200 enterococci per 100 ml. The second link gives these specifics but there are different methods and different ratings, and I found it to be quite confusing. Maybe you can figure it out...

Good luck.

2008-11-14 08:20:43 by bahi90

A new study found a chemical, believed to cause cancer, in the tap water of 31 cities. Bill Whitaker reports on the latest details.

...in a total of 5000L of water, what is the concentration? does this exceed the permissible limit?

2009-06-02 18:54:26 by Audrey A

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I always thought it was illegal to charge for drinking water in the uk. Surely there are laws that prohibit this under health and safety. There are no alternative drinking water supplies apart from vending machine and an initial charge of of 0.02p per cup has been set. This will most likely increase to 0.05p once established and probably rise further

Name and Shame these misers!

How stingey can they get?

2009-01-01 15:02:23 by clubberlang786

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From a doctor at Johns Hopkins...

To date, no independent investigation has shown that bottled water passes more safety and health checks than tap water. In fact, the National Resources Defense Council (NRDC) tested 103 brands of bottled water and concluded there was no assurance that water out of a bottle is cleaner or safer than water from the tap. Another of their conclusions didn't surprise me either: They estimated that 25 percent or more of bottled water is nothing more than tap water.

Given the lack of objective research or evidence to favor bottled water over tap water, the decision on which to drink comes down to an individual choice. However, two things we know for certain: bottled water is more convenient and more expensive than tap water.

The NRDC reported that a five-year supply of bottled water cost over $1,000 compared with $1.65 for the same amount of tap water. Not to mention the environmental impact of the many discarded plastic water bottles.

That's a great question and one I've often asked myself. I can think of three reasons for it. In some areas, the water does taste like fluoride, or chlorine. For some people, I think they think it is "cool" to be drinking out of a water bottle. For many people, they are just scared of what is in there water and think the bottle water is better. I've known for years that bottled water has little or no regulations for testing. I think the environmental impact on plastic will change things in the near future as people become more aware of how they are contributing to our environment in a negative way. Everything comes down to the almighty dollar though, doesn't it.

2007-05-02 14:40:02 by Chredon

And on a hike, what would you look for in your drinking ef="/Water-Cartridge/water-filtration-replacement-cartridge/">water to ensure safety?

Entamoeba Histolytica, an over population of Algae, Various species of diatoms are also widely used as indicator species of clean or polluted water.Other specific organism can be found at the following site:

2009-06-03 21:09:25 by RSM