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EF/SDWIS logo Column Name: D_FED_PRIM_SRC_CD



Description: A system-generated coded value that categorizes the primary water sour ce for the water system. Determination of primary source is based upon two factors, the type of the source and the availability of the source (e.g., used on a permanent, seasonal, interim, emergency basis). A specific hierarchy is followed in calculating the primary source. It is as follows: 1) Initially, only permanently available sources are examined; 2) If a non-purchased surface source is encountered, the water system is considered to be a surface water system, and the determination process is complete; 3) If a purchased surface source is encountered, the water system is c onsidered to be a purchased surface water system, and the determination process is complete; 4) If a non-purchased ground water (Under Direct Influence [UDI]) sour ce is encountered, the water system is considered to be a ground water (UDI) system, and the determination process is complete ; 5) If a purchased ground water (UDI) source is encountered, the water system is considered to be a purchased ground water (UDI) system, and the determination process is complete; 6) If a non-purchased ground water source is encountered, the water sy stem is considered to be a ground water system, and the determination process is complete; 7) If a purchased ground water source is encountered, the water system is considered to be a purchased ground water system, and the determination process is complete; 8) If there are no permanently available sources, all sources are trea ted equally, regardless of their individual availability, and steps 2 through 7 are repeated.

Envirofacts Table Name: SDW_WATER_SYSTEM

Data Source:

Properties:

Definition Source: Office of Ground Water and Drinking Water SDWIS/Federal Development Model dated 3/5/1997



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