In the Kuttanad region of Kerala, intensive untreated human sewage and agricultural activities have caused severe surface water contaminations. At the same time, other sources of fresh water are unreliable for drinking: ground water is acidic due to the soil conditions and iron leaching; fresh water from

In the Kuttanad region of Kerala, intensive untreated human sewage and agricultural activities have caused severe surface water contaminations. At the same time, other sources of fresh water are unreliable for drinking: ground water is acidic due to the soil conditions and iron leaching; fresh water from