Activities that pollute water source quality are prohibited in areas within a certain distance of a drinking water source quality protection area or drinking water intake point.
"Activities that pollute water source quality" in the foregoing paragraph refers to:
1. Illegal deforestation or land reclamation.
2. Development of industrial zones or establishment of polluting factories.
3. Development of nuclear energy and other forms of energy sources and the construction of radioactive nuclear waste storage or processing sites.
4. Dumping, release or discarding of garbage, ash, soil and rock, sludge, excrement and urine, waste oil, waste chemical products, animal carcasses or other materials could deteriorate water quality.
5. Raising livestock and poultry for profit.
6. Development of new communities. However, communities formed by aboriginal villages due to natural population increases shall not be subject to this restriction.
7. Construction, renovation or expansion of golf courses.
8. Excavation of soil and rock, mineral exploration or mineral mining.
9. Development of railways, mass rapid transit systems, harbors and airports, whose scale and scope require the implementation of environmental impact assessments.
10. River channel modification projects sufficient to impact the self-purification ability of a river and that fail to receive the authorization of the competent authority and industry competent authority
11. Roadway and athletic facility development projects that fail to receive the authorization of the competent authority and the industry competent authority
12. Other activities officially announced by the central competent authority as prohibited.
Those activities in Subparagraphs 1 through 9 and Subparagraph 12 of the foregoing paragraph that are necessary for the daily living of residents and that receive approval from the competent authority shall not be subject to this restriction.
The special municipality, county or city competent authority shall draft the scope of the drinking water source quality protection area and within certain distances from drinking water intake points in the foregoing paragraph, and shall issue official announcements after approval by the central competent authority. The central competent authority shall make decisions and issue official announcements for circumstances that involve two or more special municipalities, counties or cities.
For existing buildings or land uses in areas within a certain distance of a drinking water source quality protection area or drinking water intake point that, after official announcement, the competent authority in consultation with the relevant agencies deems are polluting a water source, the owner or user may be notified to carry out removal, make improvements or change the use within a certain time period. The water supply enterprise or other relevant enterprise shall provide compensation for all losses incurred by the owner or user.

Only water bodies designated in each subparagraph of Article 3, Paragraph 2 that meet water quality standards for drinking water sources may serve as drinking water sources. However, drinking water sources or water treatment and improvement plans submitted to the central competent authority for approval shall not be subject to this restriction. The central competent authority shall determine regulations governing criteria for proposing improvement plans, content of the plans, documentation that shall be attached, procedures, monitoring, response measures, approval conditions, rejection, corrections, and other binding matters.
The central competent authority shall determine the water quality standards for drinking water sources mentioned in the preceding paragraph.