Open AccessTemporal variation in drinking water turbidity and diagnosed gastroenteritis in Milwaukee.
Author(s) -
Robin Morris,
Ele. Naumova,
Ronnie Levin,
Rajika L. Munasinghe
Publication year - 1996
Publication title -
american journal of public health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.284
H-Index - 264
eISSN - 1541-0048
pISSN - 0090-0036
DOI - 10.2105/ajph.86.2.237
Subject(s) - turbidity , outbreak , medicine , confidence interval , turbidite , waterborne diseases , environmental health , demography , environmental science , virology , biology , ecology , paleontology , sedimentary rock , sociology
Daily counts of diagnosed gastroenteritis (gastrointestinal events) in Milwaukee County, Wisconsin, from January 1992 through April 1993 were compared with reported daily turbidity from the two drinking water treatment plants serving the county. Turbidity in both plants was associated with an increased number of gastrointestinal events even after exclusion of a major documented outbreak of cryptosporidiosis. During the 434-day period prior to the outbreak, an increase in turbidity of 0.5 nephelometric turbidity units at one of the plants was associated with relative risks for gastrointestinal events of 2.35 among children (95% confidence interval [CI] = 1.34, 4.12) and 1.17 among adults (95% CI = 0.91, 1.52).