Table 2.

Minimum and maximum concentration in mg·kg⁻¹ and year of maximum of each element and lake for the period from 1925 to 2015

	As			Cd			Cu			Cr			Ni			Pb			S			Zn
Lake	Min	Max	Year	Min	Max	Year	Min	Max	Year	Min	Max	Year	Min	Max	Year	Min	Max	Year	Min	Max	Year	Min	Max	Year
Neubrandenburg district
FH	0.15	14.5	1953	0.08	1.98	1953	5.74	39	1986	0.74	8.47	1953	1.23	7.16	1986	2.07	108	1953	1,274	15,603	1953	8.92	171	1953
BL	3.94	14.6	1953	0.21	1.96	1953	7.21	16.8	1976	2.59	7.97	1953	3.08	7.01	1953	12.5	102	1959	4,465	16,132	1953	33.6	169	1953
SL	8.95	32.8	1960	0.37	4.7	1960	25	39.8	1960	8.51	17.5	1960	6.26	14	1960	50	232	1960	10,000	566,689	1969	150	397	1960
CR	10.1	33.4	1942	1.25	5.39	1957	27.5	42	1957	14.3	37.4	1957	13.4	26.1	1957	81	279	1968	15,000	34,587	1968	180	403	1968
TF	6	88	1965	0.48	2.3	1971	25	53	1984	8	15.5	1984	7	15	1971	35	140	1971	10,500	21,500	1984	90	360	1984
OR	1.5	6	1965	0.1	0.8	1953	6	18	1982	3.5	10	1977	4	12.5	1959	6	37.5	1953	5,500	11,500	1965	25	85	1953
Frankfurt (Oder) district
PL	2.5	8.75	1958	0.2	1.4	1951	16.6	23	1964	3.5	8	1958	4.5	7	1983	22	92	1958	11,700	23,500	1970	60	150	1958
Magdeburg district
AR	n.d.	33	1954	n.d.	4	1974	9	50	1974	2	15	1974	5	22	1974	1	200	1974	6,300	30,800	1958	n.d.	500	1974
Potsdam district
ST	12	68	1966	1	9	1947	30	300	1981	4	25	1966	6	20	1966	50	550	1947	9,800	33,000	1927	140	1,400	1966
WM	15	66	1951	2.5	12.43	1960	25	54	1960	10	24.6	1960	7.5	21.7	1980	150	649	1960	16,500	47,270	1946	230	960	1960
Median	4.97	32.9	1956	0.29	3.15	1955	20.8	40.9	1975	3.75	15.3	1960	5.5	14.5	1969	28.5	170	1960	9,900	27,150	1962	75	379	1960

n.d. not detected