Population and basic characteristics of water systems of survey areas
| Site . | Source . | Treatment . | Disinfection . | Population . |
|---|---|---|---|---|
| A | Surface water (reservoir) | Chemical coagulation, sedimentation, sand filtration | Chlorine | 33,000 |
| B | Surface water (river) | Chemical coagulation sedimentation, sand filtration, ozone | Chlorine | 195,000 |
| C | Groundwater (sandstone aquifer) | None | Chlorine | 20,000 (3 cities) |
| D | River-bank infiltration | None for 50% of flow; rapid sand filtration for 20% of flow; aeration coagulation, sedimentation, rapid sand filtration for 30% of flow; water is then blended at a single facility | Chlorine | 26,000 |
| E | Groundwater (deep chalk aquifer) | Aeration and sand filtration for iron removal | Chlorine | 40,000 |
| F | River-bank infiltration, mixture of river-bank infiltration and groundwater | None | Chlorine | 25,500 (2 cities) |
| Site . | Source . | Treatment . | Disinfection . | Population . |
|---|---|---|---|---|
| A | Surface water (reservoir) | Chemical coagulation, sedimentation, sand filtration | Chlorine | 33,000 |
| B | Surface water (river) | Chemical coagulation sedimentation, sand filtration, ozone | Chlorine | 195,000 |
| C | Groundwater (sandstone aquifer) | None | Chlorine | 20,000 (3 cities) |
| D | River-bank infiltration | None for 50% of flow; rapid sand filtration for 20% of flow; aeration coagulation, sedimentation, rapid sand filtration for 30% of flow; water is then blended at a single facility | Chlorine | 26,000 |
| E | Groundwater (deep chalk aquifer) | Aeration and sand filtration for iron removal | Chlorine | 40,000 |
| F | River-bank infiltration, mixture of river-bank infiltration and groundwater | None | Chlorine | 25,500 (2 cities) |