. 2021 Jul 6;2021:5597867. doi: 10.1155/2021/5597867

Table 6.

Lead in soils, ambient air, and drinking water samples.

Sample	Study site	N	Average ± SE	Min-max	Exceed VN standard^∗ (n, %)
Soils (mg/kg) (VN standards ≤ 70)^∗	Ban Thi (BK)	30	2980.23 ± 1112.96	0.4-33820.62	27 (90.0)
Soils (mg/kg) (VN standards ≤ 70)^∗	Tan Long (TN)	30	263.46 ± 67.15	11.72-1790.36	22 (73.33)

Ambient air (μg/m³) (VN standards ≤ 1.5)^∗	Ban Thi (BK)	30	5.89 ± 0.76	1.6-18.5	30 (100.0)
Ambient air (μg/m³) (VN standards ≤ 1.5)^∗	Tan Long (TN)	30	6.79 ± 0.98	2-30.2	30 (100.0)

Drinking water (mg/L) (VN standards ≤ 0.01)^∗	Ban Thi (BK)	31	0.0033 ± 0.0005	0.002-0.0135	3 (9.68)
Drinking water (mg/L) (VN standards ≤ 0.01)^∗	Tan Long (TN)	30	0.0077 ± 0.0034	0.0002-0.0994	3 (13.33)

^∗Vietnamese standards.