How is bacteria that cause disease kept out of drinking water?

Chemicals called disinfectants are added to drinking water at the treatment plants.  Chloramines, the combination of ammonia and chlorine, form a stable bond that keeps a disinfectant residual throughout the entire distribution system.  During the spring months, Spotsylvania County Utilities performs annual flushing with free chlorine instead of chloramines.  Free chlorine is strong disinfectant that aids in the disinfection of the flushed water mains.  

Helpful Links:

Annual Water Main Flushing

Water Quality Reports

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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?