deals with the medical and biological aspects
PubMed Central (PMC) is the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature.
WASH Sources Summaries and abstracts from the scientific literature
WHO publications – search engine
Wikipedia list of waterborne Diseases
Libertas Academica publisher of 87 peer reviewed scientific, technical and medical journals.
Directory Open Access Journals listing of open access scientific and scholarly journals