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• Number of wells: 3
• Aquifer lithology: Sand, basalt and shellbed
• Depth of wells: 46.7 - 64 m
• Oxygen levels: 0 %
• pH: 7.35 - 8
• Temperature: 17.2 - 18.2 °C
• Nitrate: 0 - 0.005 g/m³
• Dissolved organic carbon: 0 - 0.7 g/m³
• Sulfate: 0 - 2.5 g/m³
• Land uses: Urban

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• Number of wells: 9
• Aquifer lithology: Sand, ignimbrite, pumice
• Depth of wells: 4.6 - 53.6 m
• Oxygen levels: 5.4 - 67.4 %
• pH: 6 - 7.5
• Temperature: 12 - 15.8 °C
• Nitrate: 0 - 5.7 g/m3
• Dissolved organic carbon: 0 - 1.6 g/m³
• Sulfate: 0 - 46 g/m³
• Land uses: Urban and agricultural

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• Number of wells: 21
• Aquifer lithology: Sand/gravel
• Depth of wells: 5 - 114.6 m
• Oxygen levels: 0.3 - 89 %
• pH: 5.5 - 7.1
• Temperature: 13.6 - 16.1 °C
• Nitrate: 0 - 9.4 g/m3
• Dissolved organic carbon: 0 - 5.5 g/m³
• Sulfate: 0 - 34 g/m³
• Land uses: Dairy, agriculture, urban, industrial

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• Number of wells: 26
• Aquifer lithology: Sand, gravel, peat
• Depth of wells: 1.2 - 69.8 m
• Nitrate: 0 - 22 g/m³
• Oxygen levels: 1 - 100 %
• pH: 5.46 - 7.57
• Temperature: 7.3 - 16.1 °C
• Nitrate: 0 - 22 g/m3
• Dissolved organic carbon: 0 - 26 g/m³
• Sulfate: 2.1 - 49 g/m³
• Land uses: Urban, agricultural, reserve