Table 5.125
Assessment results of groundwater environmental quality in high
flow period
S/N Test item
Unit
Class III
standard
value in
Quality
Standard for
Groundwater
1#
2#
4#
6#
7#
Monitored
value
Standard
index
Monitored
value
Standard
index
Monitored
value
Standard
index
Monitored
value
Standard
index
Monitored
value
Standard
index
1
pH
Dimensionless 6.5–8.5
7.670
0.570
7.720
0.610
8.180
0.790
7.360
0.310
7.590
0.500
2
Ammonia-nitrogen mg/L
0.2
0.425
2.130
0.265
1.330
0.065
0.325
0.222
1.110
0.253
1.270
3
Molybdenum
mg/L
0.1
0.022
0.220
0.006
0.060
0.007
0.070
0.035
0.350
<0.005
0
4
Zn
mg/L
1.0
0.014
0.010
0.019
0.020
0.002
0.002
0.021
0.020
0.022
0.020
5
Chloride
mg/L
250
72.70
0.290
54.40
0.220
4.730
0.019
186.0
0.740
10.300
0.040
6
Nitrate nitrogen
mg/L
20
4.060
0.200
7.050
0.350
1.490
0.075
8.050
0.400
3.940
0.200
7
Nitrite nitrogen
mg/L
0.02
0.005
0.250
0.004
0.200
0.002
0.100
0.002
0.100
0.018
0.900
8
Total dissolved
solid
mg/L
1000
1060.0
1.060
767.0
0.770
242.0
0.242
1120.0
1.120
368.0
0.370
9
Permanganate
index
mg/L
3.0
2.770
0.920
1.600
0.530
0.953
0.318
3.330
1.110
4.010
1.340
10
Arsenic
mg/L
0.05
<0.0005
0
<0.0005
0
<0.0005
0
0.002
0.030
<0.0005
0
11
Fluoride
mg/L
1.0
0.685
0.690
0.435
0.440
1.000
1.000
0.859
0.860
0.642
0.640
12
Total coliforms
MPN/L
3.0
20.0
6.670
<2
0
3.000
1.000
<2
0
50.00
16.700
13
Sulfate
mg/L
250
112
0.448
90
0.360
25.6
0.102
192
0.768
38.9
0.156
14
Total hardness
mg/L
450
434
0.964
472
1.049
160
0.356
508
1.129
242
0.538
15
Volatile phenol
mg/L
0.002
<0.002
0
<0.002
0
<0.002
0
<0.002
0
<0.002
0
16
Total number of
bacteria
cfu/L
100
6.5
 106
6.5
 104 5.1
 106
5.1
 104 3.6
 106
3.6
 104 7.6
 106
7.6
 104 4.4
 106
7.6
 104
5.6 East China
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