The water quality premium is the additional price that people are willing to pay for clean water over and above the cost of providing it.

The water option value is the value that people place on the possibility of using clean water in the future, even if they do not currently need it.

The water existence value is the value that people place on the simple knowledge that clean water exists, even if they never intend to use it.

Water pollution costs are the costs that society incurs as a result of water pollution, such as the costs of treating polluted water, the costs of lost productivity due to illness, and the costs of environmental damage.

Water pollution control benefits are the benefits that society derives from reducing water pollution, such as the benefits of improved public health, the benefits of increased productivity, and the benefits of environmental protection.

The water total economic value is the sum of the water quality premium, the water use value, the water option value, and the water existence value.

Water pollution control costs are the costs that society incurs in order to reduce water pollution, such as the costs of building and operating wastewater treatment plants, the costs of implementing pollution prevention measures, and the costs of enforcing environmental regulations.

Water pollution control benefits are the benefits that society derives from reducing water pollution, such as the benefits of improved public health, the benefits of increased productivity, and the benefits of environmental protection.

The water total economic value is the sum of the water quality premium, the water use value, the water option value, and the water existence value.

Water pollution control costs are the costs that society incurs in order to reduce water pollution, such as the costs of building and operating wastewater treatment plants, the costs of implementing pollution prevention measures, and the costs of enforcing environmental regulations.

Water pollution control benefits are the benefits that society derives from reducing water pollution, such as the benefits of improved public health, the benefits of increased productivity, and the benefits of environmental protection.

The water total economic value is the sum of the water quality premium, the water use value, the water option value, and the water existence value.

Water pollution control costs are the costs that society incurs in order to reduce water pollution, such as the costs of building and operating wastewater treatment plants, the costs of implementing pollution prevention measures, and the costs of enforcing environmental regulations.

Water pollution control benefits are the benefits that society derives from reducing water pollution, such as the benefits of improved public health, the benefits of increased productivity, and the benefits of environmental protection.

The water total economic value is the sum of the water quality premium, the water use value, the water option value, and the water existence value.