Table 2 Physicochemical characteristics of the groundwater samples in the study area (mg/L).

From: Mineral pollutants and coliform contamination in groundwater pose health risks to consumers: a spatiotemporal study in a mining-impacted area

  

Spring

  

Autumn

 
 

Mean ± SE

Min

Max

Mean ± SE

Min

Max

DO

6.64 ± 1.18

2.4

8.9

7 ± 1.10

2.2

8.8

pH

7.8 ± 0.30

6.87

8.9

7.88 ± 0.27

6.6

8.61

EC

1.40 ± 0.7

0.27

4.73

2.13 ± 3

0.32

25.4

COD

8 ± 31.08

0.6

295.6

11.08 ± 42.41

0

267.5

BOD

6 ± 23.5

0.44

224.66

8.20 ± 31.48

0

200.63

TH

313.47 ± 184.30

80

1616

394.13 ± 315.48

96

2600

TDS

896.68 ± 435.72

170.44

3024.4

265.12 ± 134.56

87

1980

PO43-

0.70 ± 0.34

0.11

1.11

0.71 ± 3.18

0.03

32.41

N-NH4+

0.82 ± 0.9

0.08

5.58

4.68 ± 31

0.11

310.88

SO42-

175.45 ± 123

8.17

758.8

306.72 ± 615.80

8

5625.78

NO3-

15.26 ± 9.41

0.32

64.99

19.30 ± 15.61

0.34

104.93

F-

0.53 ± 0.68

0

5.21

0.72 ± 0.65

0

5

TA

244.72 ± 105

104

730

2670.90 ± 150.68

120

1264

HCO3-

296.27 ± 127.44

125.56

886.95

326.60 ± 180.63

145.13

1518.32

PC

554.50 ± 245.50

9

1100

401.02 ± 450.22

0

1100

CC

120.56 ± 300

0

1100

133.33 ± 330

0

1100

  1. DO: dissolved oxygen, EC: electrical conductivity, COD: chemical oxygen demand, BOD: biological oxygen demand, TH: total hardness, TDS: total dissolved solids, TA: total alkalinity, PC: probable coliform, and CC: confirmed coliform (CFU/100 mL).
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