Kathleen "Kathy" Lewis is an environmental chemist and professor of agricultural chemistry at University of Hertfordshire known for her work on environmental management, especially in the realm of pollution from chemicals.
Her early work developed metrics to quantify the impact of agriculture and pesticides on the environment,[5][6] and applied these tools to agricultural activities in the United Kingdom.
[7] She developed a tool to track agricultural issues known as Environmental Management for Agriculture (EMA),[8] which was distributed on CDs and has been retired.
[9] Her subsequent work is as the scientific lead[10] for the on-line Pesticide Properties Database (PPDB).
[12] In a 2017 expansion of the database, Lewis provided a means to track how pesticides dissipate in the environment.