There are several types of water that can cause corrosion, including seawater, fresh water, brackish water, and wastewater. Seawater can cause galvanic corrosion and crevice corrosion due to its salt content. Fresh water corrosion depends on factors like oxygen content, hardness, and chloride levels. Brackish water has more salt than fresh water but less than seawater. Wastewater can cause biological corrosion from sulfate-reducing bacteria that produce hydrogen sulfide. The type of corrosion depends on the water composition and microbes present.