If you are in Hawaii during or after a major storm, be aware of water advisories. Proper water treatment includes treating with water purification tablets or boiling. Bring all water to a boil, let it boil for one minute, and let it cool before using, or use bottled water. Boiled or bottled water should be used for drinking, making ice, brushing teeth, washing dishes, and food preparation until further notice. Boiling kills bacteria and other organisms in the water. Filtering will not remove contaminating pathogens.
Every time a major storm hits the islands, havoc can occur in the form of flooding and landslides that block roads and cause property damage. After the debris has been scraped away and roads reopen, runoff from cow pastures further upsloap and broken water lines may contaminate drinking water reserves. County Departments of Water Supply often issue a warning to residents that goes something like this: treat all tap water before drinking.
On Maui, the most commonly affected areas include: Copp Road, Alae, Naalae Road, Waipoli, Polipoli, Waiohuli, Keokea, Ulupalakua and Kanaio.