What is the purpose of drinking water quality standards and who sets them?

• A. To regulate municipal budgets and funding; set by local water utilities.
• B. To protect public health and ensure safety and palatability; set by national authorities (e.g., EPA, WHO guidelines) and enforceable by law.
• C. To determine water pricing; set by industry associations.
• D. To encourage bottled water consumption; set by marketing groups.

Answer: (B)

Drinking water quality standards exist to protect public health by limiting contaminants and to ensure water is safe to drink and pleasant to use. These standards are set by national authorities, such as environmental or health agencies (for example, the EPA in the United States), and may reference international guidelines like those from the World Health Organization. They are enforceable by law, meaning water systems must monitor, treat, and test water to meet these limits and address any violations through corrective actions or penalties. This combination of health protection, safety, and enforceability is what makes this option the best fit. The other choices miss the purpose—standards aren’t about budgeting, pricing, or marketing—and aren’t set by local utilities or industry groups.