指标 | 风险筛选值 | 背景值 | |||
pH ≤ 5.5 | 5.5 < pH ≤ 6.5 | 6.5 < pH ≤ 7.5 | pH > 7.5 | ||
Cd | 0.3 | 0.4 | 0.6 | 0.8 | 0.4 |
Hg | 0.5 | 0.5 | 0.6 | 1 | 0.13 |
As | 30 | 30 | 25 | 20 | 13.48 |
Pb | 80 | 100 | 140 | 240 | 33.57 |
Cr | 250 | 250 | 300 | 350 | 98.98 |
Cu | 150 | 150 | 200 | 200 | 34.5 |
Ni | 60 | 70 | 100 | 190 | 39.3 |
Zn | 200 | 200 | 250 | 300 | 104.21 |