Sammendrag
Abstract: Simple, automated methods are required for rapid detection of wastewater contamination
in urban recreational water. The activity of the enzyme b-D-galactosidase (GAL) can rapidly (5 LOG10. Furthermore, the
GAL-activity per gram feces from birds, sheep and cattle was 2–3 LOG10 lower than the activity from
human feces, indicating that high GAL-activity in water may reflect human fecal pollution more than
the total fecal pollution. The rapid method can only be used to quantify high levels of human fecal
pollution, corresponding to about 0.1 mg human feces/liter (or 103 E. coli/100 mL), since below this
limit GAL-activity from non-fecal environmental sources may interfere.
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