Disclosed herein are methods and compositions for treating, inhibiting, or ameliorating pulmonary infections, including cystic fibrosis. Aspects described herein relate to compositions including a saline solution and hypochlorite and methods of using these compositions alone or in combination with additional compounds, including antibiotics, an anti-inflammatories, bronchodilators, mucolytics, or oxygen therapy for treating, ameliorating, or inhibiting a pulmonary infection, including cystic fibrosis.