A chloride test measures chloride levels (an essential electrolyte) in blood or urine to check your body’s fluid balance, acid-base balance (pH), and kidney/lung function, often part of a routine panel or kidney function test (KFT). Normal ranges are typically around 96-106 mEq/L in blood, with high levels suggesting dehydration or kidney issues, and low levels potentially indicating heart/liver problems or metabolic alkalosis, helping diagnose underlying conditions or monitor treatment