title: Faecal sterols analysis for the identification of human faecal pollution in a non-sewered catchment.
abstract: In this study, faecal sterols were used to identify human faecal pollution in a non-sewered catchment in Southeast Queensland, Australia. In all, 36 water samples were collected from six sites on six occasions and the concentration of sterols were determined using gas chromatography and mass spectrometry. The stanols concentration in water samples generally increased with increased catchment runoff. After moderate rainfall, high coprostanols levels found in water samples indicated human faecal pollution via defective septic systems. In contrast, it appears that during dry weather human faecal pollution is not occurring in the study catchment. Sterol profiles also pointed to a cattle farm polluting during modest catchment runoff. The method used in this study was able to identify the sources of faecal pollution to the catchment due to rainfall.
authors.affiliation: Faculty of Science, Health and Education, University of the Sunshine Coast, Maroochydore, DC 4558, Queensland, Australia.
authors.forename: D
authors.initials: D
authors.lastname: Sullivan
authors.forename: P
authors.initials: P
authors.lastname: Brooks
authors.forename: N
authors.initials: N
authors.lastname: Tindale
authors.forename: S
authors.initials: S
authors.lastname: Chapman
authors.forename: W
authors.initials: W
authors.lastname: Ahmed
mesh_terms: D000383:Agriculture; D000818:Animals; D001315:Australia; D002417:Cattle; D004784:Environmental Monitoring; D004787:Environmental Pollution / Q000032:analysis; D005243:Feces / Q000737:chemistry*; D005843:Geography / Q000379:methods; D006801:Humans; D007220:Industrial Waste; D008055:Lipids / Q000737:chemistry; D013058:Mass Spectrometry / Q000379:methods; D013261:Sterols / Q000737:chemistry*; D014871:Water Microbiology; D014872:Water Movements; D018508:Water Purification / Q000379:methods*
chemical_list: D007220:Industrial Waste; D008055:Lipids; D013261:Sterols