Sectors typically supplied with well-treated potable water in a public water-supply system (Select the most comprehensive correct option.)

Introduction / Context:
Municipal potable water systems distribute treated water to a variety of consumers. Recognizing the principal use sectors helps in demand assessment and system design.

Given Data / Assumptions:

• Treated water meets drinking-water standards.
• Distribution covers households, commerce/industry, and public/institutional facilities.
• Wastewater is collected separately via sewers and is not a consumer of potable supply.

Concept / Approach:
Water-demand categories in planning include domestic, commercial/industrial, and public (municipal/institutional) components. Wastewater is an output from these uses and is conveyed to treatment, not a supply sector to which potable water is “delivered”.

Step-by-Step Reasoning:

Verification / Alternative check:
Standard water-works texts categorize demands precisely in these classes for per capita or unit-area projections.

Why Other Options Are Wrong:

• (a), (b), (c) are each partial truths but not comprehensive alone.
• (d) is incorrect—wastewater is not a “use” sector of treated water.

Common Pitfalls:
Confusing wastewater (collection and treatment) with water-demand categories; they are different subsystems.

Final Answer:
All of the above except wastewater