Why Is the Salt Put on Icy Sidewalks?

Melting Salts

• Depending on the type of salt dissolved in water, it may lower the freezing temperature to as low as -25 degrees Fahrenheit. Application of salts to snow- or ice-covered sidewalks and streets melts the ice, making the walks and streets safer for drivers and pedestrians.

Application

• Salt is applied to streets, usually after accumulation of snow and ice has occurred, with trucks made for spreading salt or by hand on sidewalks. Hand-pushed spreaders may also be used for sidewalks.

Downsides

• Salts negatively impact lakes and streams as well as plants. Runoff from melting snow and ice contaminated with salt pollutes the soil and water. Salt is also highly corrosive and damages vehicles by causing rust and corrosion.