登入選單
返回Google圖書搜尋
註釋Major findings: 1) Contaminants in water from one of every three drinking-water wells sampled are a potential human-health concern. 2) Arsenic and uranium derived from geologic sources are potential drinking-water concerns. 3) Dissolved-solids concentrations in groundwater are increasing in some areas. 4) Artificial recharge and groundwater withdrawals are moving contaminants to deeper parts of basin-fill aquifers.