Tolong jelaskan mengenai Rujuakan dari Panjarnihan aia dalam bahasa minangkabau

"Water On Tap: What You Need To Know." – Consumer Guide to Drinking Water in the US (EPA)

Emergency Disinfection of Drinking Water – Camping, Hiking and Travel (CDC)

Code of Federal Regulations, Title 40, Part 141  – U.S. National Primary Drinking Water Regulations