Controlling corrosion, done properly, can help extend the useful life of water infrastructure. Effective prevention or mitigation strategies to control corrosion are appropriate for the material and the environment involved, as well as economically feasible.The newly revised and renamed Manual M27 presents a logical and well-considered look at 1.How and why corrosion occurs 2.How to evaluate the corrosion potential of an environment 3.How prevention and control measures operate