Table 2.

Radioactivity of gross α and gross β in three types of drinking water around SNPP from 2014 to 2021.

Year	Raw water		Factory water		Tap water
	Gross α (Bq/L)	Gross β (Bq/L)	Gross α (Bq/L)	Gross β (Bq/L)	Gross α (Bq/L)	Gross β (Bq/L)
2014	0.017 ± 0.011	0.073 ± 0.047	0.013 ± 0.007	0.040 ± 0.002	0.013 ± 0.007	0.035 ± 0.006
2015	0.009 ± 0.003	0.059 ± 0.045	0.008 ± 0.000	0.053 ± 0.028	0.008 ± 0.000	0.034 ± 0.028
2016	0.010 ± 0.006	0.112 ± 0.148	0.008 ± 0.000	0.062 ± 0.033	0.008 ± 0.000	0.082 ± 0.092
2017	0.008 ± 0.000	0.046 ± 0.013	0.008 ± 0.000	0.054 ± 0.008	0.008 ± 0.000	0.041 ± 0.018
2018	0.008 ± 0.000	0.049 ± 0.014	0.008 ± 0.000	0.039 ± 0.013	0.008 ± 0.000	0.032 ± 0.010
2019	0.008 ± 0.000	0.043 ± 0.010	0.008 ± 0.000	0.049 ± 0.023	0.008 ± 0.000	0.034 ± 0.006
2020	0.010 ± 0.005	0.042 ± 0.023	0.008 ± 0.000	0.043 ± 0.010	0.009 ± 0.003	0.040 ± 0.006
2021	0.011 ± 0.008	0.055 ± 0.012	0.008 ± 0.000	0.046 ± 0.006	0.008 ± 0.000	0.049 ± 0.007
Mean ± SD	0.010 ± 0.003	0.060 ± 0.024	0.009 ± 0.002	0.048 ± 0.008	0.009 ± 0.002	0.043 ± 0.016