Optimal fluoride concentration for dental health To ensure proper growth and protection of children’s teeth, what is the typical fluoride dosage maintained in potable water supplies?

Introduction / Context:
Controlled fluoridation of potable water is practiced in many regions to reduce dental caries in children. The dosage must be carefully set to achieve benefits while avoiding fluorosis risks.

Given Data / Assumptions:

• Typical temperate climate and average water consumption.
• Standard guidance for community water fluoridation.

Concept / Approach:
Historically, about 1 mg/L (1 ppm) fluoride was considered optimal for many climates. Some modern guidelines adjust the target based on temperature and intake, but 1 mg/L remains a widely recognized benchmark in textbook problems addressing caries prevention without exceeding aesthetic/toxicity limits.

Step-by-Step Solution:

Verification / Alternative check:
Public health references historically cite ~0.7–1.2 mg/L depending on conditions; 1 mg/L is a standard teaching value.

Why Other Options Are Wrong:
2–5 mg/L exceed typical recommended levels and risk fluorosis and aesthetic issues.

Common Pitfalls:
Ignoring natural background fluoride which may already meet or exceed targets; blending or defluoridation may be necessary.

Final Answer:
1 mg/L