Table 2.

The average precipitation per unit area in some regions of the world and in Kazakhstan (μg/L/year).

Country	Years	Locations	Kind of sample	Heavy metals				Reference
				Pb	Cd	Cu	As
China	2013–2014	Rural	Wet soluble	0.06–0.50	0.03–0.98			Zhu et al. (2015)
France	2010–2012	Rural, northwest	Wet + dry	142	9			Connan et al. (2013)
Spain	2004–2006	Pyrenees	Wet + dry	1.50	1.32	1.19	0.07	Bacardit and Camarero (2009)
USA	1992–1993	Massachusetts	Wet + dry	2700	405	3500	132	Colomb et al. (2007)
Japan	2008	West coast	Dry	3.7–5.2	0.14–0.17	0.71–2.4	0.49–0.71	Sakata et al. (2008)
South Korea	2006–2009	Rural	Wet + dry	1.06	0.05			Kim et al. (2012)
Turkey	2009–2010	Industrial	Wet + dry	189000	4200	44800	2000	Kara et al. (2014)
Kazakhstan	2013–2018	Rural, north Kazakhstan	Wet	570	57.1	3800	114	Present study
Kazakhstan		Mountains Mynzhilki	Wet	1520	206.9	7720	275.9	Present study
Kazakhstan		Industrial Dzheskazgan	Wet	1130	414.1	2970	828.2	Present study