SAFETY - WATER QUALITY: Technical Information--Briefing paper on "Water-borne diseases" In Reply Refer To: March 18, 1980 EGS-Mail Stop 412 QUALITY OF WATER BRANCH TECHNICAL MEMORANDUM NO. 80.11 Subject: WATER QUALITY: Technical Information--Briefing paper on "Water-borne diseases" by Phillip E. Greeson, Quality of Water Branch, Reston, Virginia The enclosed general discussion of water-borne diseases is a continuation of the series of briefing papers on biological aspects of water quality. After reading the paper, one should be acutely aware of the potential hazards associated with periodic contact with natural waters. In fact, WRD and other personnel should assume that any water they sample or measure is contaminated with pathogenic organisms. It should be a regular practice after sampling to thoroughly disinfect with a biocidal agent (for example, germicidal soap or alcohol) any exposed skin that has come in contact with the water. At present, the Quality of Water Branch has approved only two methods for the detection of pathogenic organisms. Please refer to the diatomaceous-earth/membrane-filter method for Salmonella and Shigella (TWRI, Book 5, Chapter A4, p. 79-89) and to the membrane filter method for Pseudomonas aeruginosa (Open-File Report 79- 1279, p. 10-19). As stated in Quality of Water Branch Technical Memorandum No. 75.21 (May 6, 1975), these two methods are approved for use only by those individuals who have special training and knowledge in the handling of pathogenic organisms. Extreme care must be taken in the use of the methods since they provide for the reproduction and enhancement of growth of pathogenic bacteria. Please circulate the enclosed briefing paper as widely as possible in all district and project offices. R. J. Pickering Chief, Quality of Water Branch Enclosure WRD Distribution: A, B, FO-L, PO