Table 5.126
Assessment results of groundwater environmental quality in level 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 value
(Dimensionless)
6.5–8.5
7.44
0.293
7.18
0.12
7.64
0.307
7.52
0.347
7.32
0.213
2
Sulfate
mg/L
250
62.2
0.2488
48
0.192
13.6
0.0544
160
0.64
22.3
0.0892
3
Copper
mg/L
1.0
<0.009
0
<0.009
0
<0.009
0
<0.009
0
<0.009
0
4
Zn
mg/L
1.0
<0.001
0
<0.001
0
<0.001
0
0.004
0.004
0.001
0.001
5
Chloride
mg/L
250
256
1.024
83.4
0.3336
13.5
0.054
230
0.92
41.2
0.1648
6
Chroma
degrees
15
<5
0
<5
0
<5
0
<5
0
<5
0
7
Turbidity
NTU
3
< 1
0
< 1
0
< 1
0
< 1
0
< 1
0
8
Total hardness
mg/L
450
411
0.913
497
1.104
154
0.342
593
1.318
324
0.72
9
Total dissolved
solid
mg/L
1000
882
0.882
1114
1.114
343
0.343
1966
1.966
581
0.581
10
Permanganate
index
mg/L
3.0
3.58
1.193
1.41
0.47
1.57
0.523
3.42
1.14
1.67
0.557
11
Nitrate nitrogen
mg/L
20
4.7
0.235
7.06
0.353
2.4
0.12
7.06
0.353
3.9
0.195
12
Nitrite nitrogen
mg/L
0.02
0.013
0.65
<0.001
0
<0.001
0
0.014
0.7
0.045
2.25
13
Ammonia-nitrogen
mg/L
0.2
0.092
0.46
0.044
0.22
0.025
0.125
0.122
0.61
0.05
0.25
14
Fluoride
mg/L
1.0
0.636
0.636
0.313
0.313
0.886
0.886
0.607
0.607
0.429
0.429
15
Total coliforms
MPN/L
3.0
<2
0
<2
0
<2
0
<2
0
<2
0
16
Total number of
bacteria
cfu/mL
100
2.3
 102
2.3
2.4
 102
2.4
8.3
 102
8.3
8.1
 102
8.1
5.2
 102
5.2
17
As
mg/L
0.05
0.0026
0.052
<0.0005
0
<0.0005
0
0.0087
0.174
<0.0005
0
5.6 East China
375