Dunno where you get your info but everything you've said is wrong.
Soda is a
diuretic, it's not because they use distilled water.
There are usually half a million violations to clean water rights in the USA in a year and nothing has to be done about it. Most municipalities do not have the funds to fix all the problems with water.
By law they are only required to remove contagious pathogens such as typhoid, and dangerously high levels of only a few contaminants such as arsenic. Everything else is on your shoulders.
The problem is that if the government is doing their job (by adding chlorine to kill bugs), they can legally tell you that you 'have the best water in the world!' Which is a lie.
Here is a link to your city's water report go to page 9 to see the results:
http://www.cityofhenderson.com/utility_services/docs/2008_water_quality_report.pdf
You should note that that is by no means a thorough water analysis, and only covers maybe 10-15% of what is in the water. They do not cover aluminum which is often used in water treatment in the form of aluminum suphate. There would also be about 30 other contaminants listed, plus a diagnostic pesticide scan of about 300 pesticides, if it were a truly thorough analysis.
Keep in mind that although we are talking about ppm and ppb, heavy metals build up in your fat tissue, liver, and kidneys, and high calcium content in water can be a major cause of heart disease. You need clean water to help flush those USELESS minerals and metals, so the body can be nourished by
organic minerals and metals from vegetables and fruits. NONE of the elements present in water are organic, which means they can't be very well used in the body, which means it has to either build up somewhere over the decades in your body or the body has to work hard to excrete them. The minerals in water come from dirt. Dirt is what plants eat to get their minerals, they change the minerals into organic components, and we along with most other animals get our nourishment from plants or from eating other animals that eat plants.
What chameleons drink in the wild is rain water, which
IS distilled water. A good quality reverse osmosis creates the same or similar quality water as distilled.
People shouldn't be drinking tap water, and fridge filters, or simple carbon filter (pitcher) only remove the taste and odor, but not the actual contaminants (basically it fools your taste buds into thinking it is clean water). There's a reason certain diseases are so prevalent and no one ever thinks of what might be in the water.
Tap water is good for washing your car and flushing the toilet, and really that's about all it should be used for. Showering, cooking, and drinking should all be done with purified water.
If you are concerned about minerals, there are additives you can buy to put minerals back into the water after it's been purified, that's what I do.