About pH (Urine)
Urine pH measures the acidity or alkalinity of the urine, normally ranging from 4.5 (acidic) to 8.0 (alkaline). The kidneys use urinary acid excretion as one of the key mechanisms for maintaining blood pH, so urine pH reflects both dietary patterns and systemic acid-base status. Persistently acidic urine (below 5.5) increases the risk of uric acid kidney stones; alkaline urine (above 7.0) is associated with UTI caused by urease-producing bacteria, or with renal tubular acidosis.