WATER SYSTEM IN INDONESIA
Clean water is a scarce resource in Indonesia, especially during dry season (called "kemarau"). Many people have to buy water, drill wells, and ask neighbors if they have any. Many houses in rural areas do not have water pipe from the Government agency ("PD Air Minum"). My house is an example. I have to drill a well and pump water (with electrical water pump) into a water tank.
As a guideline, water is not drinkable directly from the tap. Do not even try!
You have to boil the water before you drink it, or else you'll get sick. (There was a talk of plan to make water drinkable directly from the tap in Jakarta. Don't hold your breath) Or you can buy bottled water, in small sizes or in gallons. Stomachache is common. It ranges from inconvenience to dangerous (fatal, if you loose lots of your body water and not treated).
Most Indonesians take a bath at least once a day. In big cities, such as Jakarta, many do it twice a day. After you arrived at home from work, your body is usually so sticky from sweat and dusts. Most people do not have a western-type shower in their bathroom. They use a different style bathroom (usually with a tub filled with water and squat toilet).
I'll write more on this...
Rainy season is supposed to bring water. However, it also brings floods in many areas. Sewer system is not that great. Many people dump garbage on the side of the street, river, etc. clogging the drainage system, which is already bad in itself. Many streets are poorly designed. Water spills on the street, damaging the street.
If it sounds bad, it is. But we'll live... You will too. We'll find ways to cope with all of these problems.