Table 4 Family drinking water sources of the rural residents in the high- and low-EC incidence areas. ΔIn the permissible value of Drinking Water Quality Standards in China. *P < 0.05 is statistically significant.
Yanting County of Sichuan Province (n = 920) | Qingzhen City of Guizhou Province (n = 313) | χ2 | P | |
|---|---|---|---|---|
Drinking water sources | 111.075 | 0.000* | ||
Tap waterΔ | 667(72.5%) | 185(59.1%) | ||
Deep water in a pressurized well | 101(11.0%) | 10(3.2%) | ||
Shallow water in a pressurized well | 54(5.9%) | 14(4.5%) | ||
Deep water in a water injection well | 56(6.1%) | 12(3.8%) | ||
Shallow water in a water injection well | 3(0.3%) | 6(1.9%) | ||
Spring in a water injection well | 39(4.2%) | 86(27.5%) |
