The composition of BlueTurtleWater must comply with mandatory health and safety limits, and for brand consistency, it must maintain a specific range for aesthetic parameters. This data is often required to be displayed on the product label.

A. Physical and Sensory Parameters

• pH: Typically maintained in a neutral to slightly alkaline range (6.5 to 8.5) for optimal taste and health.
• Total Dissolved Solids (TDS): The measure of inorganic salts, minerals, and metals dissolved in the water. For packaged drinking water, this is generally kept low, often below $500\ mg/L$.
• Turbidity & Color: Must be virtually non-existent (e.g., $\leq 2\ NTU$ and $\leq 5\ PCU$).

B. Essential Mineral Content (if added/maintained)

• Calcium ($Ca^{2+}$): An essential mineral, often targeted in the range of $20-75\ mg/L$ for health benefits and taste.
• Magnesium ($Mg^{2+}$): Another vital mineral, often targeted in the range of $10-30\ mg/L$.
• Sodium ($Na^{+}$) and Potassium ($K^{+}$): Should be present in very small, safe quantities.

C. Chemical and Toxic Substance Limits

BlueTurtleWater must ensure all harmful chemicals are absent or present at concentrations well below the Maximum Contaminant Levels (MCLs) set by regulatory bodies. These include, but are not limited to:

• Heavy Metals (Lead, Arsenic, Mercury).
• Nitrates/Nitrites.
• Fluoride (must be within a strict, safe limit).
• Pesticide residues.