Final answer:
Public water mains are typically a safe source of drinking water.
Step-by-step explanation:
The statement that it is often dangerous to use water from public water mains is False. Public water mains are typically a safe and regulated source of drinking water. Water treatment plants ensure that the water meets specific quality standards before it is distributed to consumers. However, it is always important to follow local advisories or boil water notices in case of any contamination or maintenance issues. Overall, tap water from public water mains is generally safe to use.
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