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Samples of the quality of rainwater collected in the storage tank are analysed and compared with World Health Organisation (WHO) Drinking Water Quality Guidelines (see Table 2). The results show that the pH which ranges from 6.26 to 6.62 is reasonable. The hardness at between 8.6 to 32.6 is low. The manganese and iron contents are low as well. Toxic metals such as cadmium at less than 0.001 mg/l is below the WHO Guideline while lead at < 0.05 mg/l is above the WHO Guideline. The Faecal Coliform at 20 counts per 100 ml shows contamination from some animals.

Table 1 shows average water use for facilities using rainwater based on twelve months data. Since there was no treatment to the rainwater collected, therefore it is strictly used for toilet flushing, general cleaning and washing clothes.

Table 2 : Rainwater Quality in Storage Tank