Standard methods for the examination of water and sewage

"Standard methods for the examination of water and sewage online" by the Association of Official Agricultural Chemists is an early version of what could be considered an official and widespread manual to ensure clean water and a functioning sewage system. It might not be a topic most people would think to read about, but it is an essential part of a functioning city. The publication of this text, in fact, signifies a shift in society to operate in a way that benefits the greater population and not just those who can afford clean water.