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- Water quality 7
- Water-supply 5
- Water--Purification 4
- Water--Storage 4
- Karkūk (Iraq) 3
- Bureaucracy 2
- Drinking water 2
- Filters and filtration 2
- Finance 2
- Pipelines 2
- Sewage 2
- Water consumption 2
- Building 1
- Economics 1
- Politics and government 1