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Six base units were recommended: the metre, kilogram, second, ampere, degree Kelvin (later renamed kelvin), and candela. In 1960, the 11th CGPM named the system the International System of Units, abbreviated SI from the French name, Le Systeme SystÃ¨me international'D. unites unitÃ©s
1 In 1647, the first water pollution control regulation was put into effect in the British colony of Massachusetts. 2  In the early to mid-1700s, the need for a collector sewer system was recognized and it was installed.3  By the 1870s, sewers were too small; an interceptor was needed. In the early to mid-1700s, the need for a collector sewer system was recognized and it was installed. 2  By the 1870s, sewers were too small; an interceptor was needed. 3  The first combined interceptor (in the U.S.) was authorized in 1876. 4  Materials were mostly brick.