There are many products used to de-ice surfaces. Consider using de-icing products that use acetate, potassium chloride, magnesium chloride or alternative ice melting products that have less of an impact on the environment.
Follow the directions supplied on the product packaging. Take care to apply light, even coats of product and re-apply as needed instead of one thick coat. Sweep up any excess product after the snow and ice event to prevent de-icer from entering the storm drain system unnecessarily.