Estrogenic activity in drainage water: a field study on a Swiss cattle pasture

Environmental Sciences Europe

Table 3 Results of the water chemistry and physical parameters at “Shaft”: measurements between April 16 and June 28, 2010

Parameter	Median	Min	Max	Values below range^c	Values above range^c	Hornbach 2009
PO₄-P (mg/l), n = 21	0.23	0.06	0.91	3	8	0.05
NO₃-N (mg/l), n = 21	8.28	5.93	10.6	0	0	5.15
NH₄-N (mg/l), n = 21	0.2	0.02	0.35	9	1	0.02
Chloride (mg/l), n = 19	15.9	7.42	23.5	0	0	14.65
Hardness (°dH), n = 3	18.5	14.5	18.8	0	11	n.a.
Electrical conductivity (μS/cm), n = 16	692^b	595^b	786^b	–	–	611
Oxygen (mg/l), n = 4498^a	9.10^a	6.12^a	10.21^a	–	–	10.55
pH, n = 16^b	7.76	7.01	8.13	0	0	8.2

n.a. no data available
^aMeasurement with Troll 9500
^bMeasurement with Hach HQ40
^cMeasurement ranges: PO₄-P 0.05–1.5 mg/l, NO₃-N 0.23–13.5 mg/l, NH₄-N 0.015–2.0 mg/l, Cl 1–1000 mg/l, hardness 1–20 °dH, electrical conductivity 0.01μS/cm–200 ms/cm