Table 5.101
Screening threshold of pollutants of concern
No. Pollutants
Screening levels based on carcinogenic effects
Screening levels based on non-carcinogenic
effects
Screening levels
(for health
protection)
Screening threshold
(for protecting water
environment)
Comprehensive
screening
threshold
RSLGov RSLGiv RSLGTOX RSLGhea HSLGov HSLGiv HSLGTOX HSLGhea SLGhea
SLGMCL SLGenv SLGint
1
Nitrites
–
–
–
–
–
–
–
–
2
KNO
3
–
–
–
–
–
–
–
–
3
Ammonia
–
–
–
–
–
–
–
–
4
F
–
–
–
–
–
–
–
–
5
C l
–
–
–
–
–
–
–
–
6
Cyanide
–
–
–
–
–
–
–
–
7
Phenol
–
–
–
–
–
–
–
–
8
H g
(inorganic)
–
–
–
–
–
–
–
–
9
A s
(inorganic)
–
–
–
–
–
–
–
–
10
Mn
–
–
–
–
–
–
–
–
11
Cd
–
–
–
–
–
–
–
–
12
Zn
–
–
–
–
–
–
–
–
13
Cr (VI)
–
–
–
–
–
–
–
–
14
Pb
–
–
–
–
–
–
–
–
5.5 North China
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