These are the most important spas in Lombardy, with the classification of their thermal waters:

- Angolo Terme (BS): sulphate-bicarbonate-alkaline water;
- Boario Terme (BS): sulphate-bicarbonate-calcic water;
- Bormio (SO): bicarbonate-sulphate-alkaline and radioactive water;
- Bracca (BG): bicarbonate-calcic-sulphate-magnesiac, lithia and radioactive water;
- Gaverina Terme (BG): bicarbonate-alkaline-sulphureous and radioactive water;
- Miradolo Terme (PV): salso-bromo-iodic-bicarbonate water;
- Ome (BS): bicarbonate-calcic and chalybeate water;
- Rivanazzano (PV): salso-bromo-iodic-sulphureous water;
- Godiasco-Salice Terme (PV): salso-bromo-iodic water; sulphureous water;
- San Colombano al Lambro (MI): salso-bromo-iodic and sulphureous;
- San Pellegrino Terme (BG): bicarbonate-sulphate-calcic-magnesiac water;
- Sant'Omobono Imagna (BG): sulphureous water;
- Sirmione (BS): sulphureous and salso-bromo-iodic water;
- Taceno-Tartavalle Terme (LC): sulphate-bicarbonate-alkaline water;
- Trescore Balneario (BG): sulphureous water;
- Vallio Terme (BS): bicarbonate-alkaline water;
- Val Masino (SO): sulphate-calcic and radioactive water.