While the maintenance by a city of a sewerage-drainage system is connected with the preservation of the public health, and therefore is a governmental function, and while ordinarily a city cannot be held liable for damage to person or property caused by negligence of any of the city’s servants while engaged in such work (City Council of Augusta v. Cleveland, 148 Ga. 734, 98 S. E. 345, and citations), or by an error of judgment on the part of its authorities in adopting a general plan of drainage and in determining when,
Judgment reversed.