Why does tap water sometimes look milky or opaque?

During the time of year when the water coming into the house is colder than the temperature inside the house, this phenomenon can occur.  Cold water holds more oxygen than warm water does; consequently when the cold water from the water mains outside comes inside our warm homes and the water begins to warm, the oxygen has to escape.  It does so through air bubbles which makes the water look milky.  A visual example of this is to run water into a clear container, then the phenomenon described is occurring.  The air bubbles are moving from the bottom to the top of the container to escape into the open atmosphere.

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1. Where can I find Spotsylvania County Utilities' Water Quality Reports?
2. Who makes the rules and regulations for drinking water?
3. What is the source of my drinking water?
4. How is bacteria that cause disease kept out of drinking water?
5. How "hard" is Spotsylvania County Utilities water?
6. Is it safe to drink water from a garden hose?
7. Can water straight from the tap be used in home kidney dialysis machines?
8. Is it okay to use water from the hot water tap for drinking, cooking or making baby formula?
9. Can I store drinking water indefinitely and continue to be safe to drink?
10. Do I need to treat the tap water in any way before I place fish in an aquarium?
11. Why does tap water sometimes look milky or opaque?
12. Why do my ice cubes have white particles in them?
13. What is the white residue that sometimes builds up on coffee pots, irons, shower doors, glassware and cookware?
14. What is the pink stuff in my toilet, shower or pet's dish?
15. Why does my water have a stronger chlorine smell in the Spring?
16. Who controls my water quality?
17. What is the rotten egg or sulfur smell?