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To attain acceptable water quality, monitoring is essential, especially when the water will be used for drinking purposes. Water samples from the RWH tanks and other preferred water sources (river and borehole) were analyzed for physical, chemical, and microbiological quality (Table 2) at the University of Dar es Salaam's water quality laboratories. All of the samples, except the one from the Mnyundo School RWH system, had total coliform counts above the recommended standard values of both Tanzania and the WHO (Table 2). By consuming such contaminated water, cases of diarrhea and other symptoms are inevitable, incurring medical costs, which further affect the economy of already poor families.

Table 2

Water quality test results for samples from available water sources around Mnyundo school (April 2013)

Sampling source
Water quality standards
S/NParameterMnyundo Pr. School RWHSRiverBoreholeTZWHO
pH 6.58 7.38 7.32 6.50–8.50 6.5–9.5 
Total dissolved solids (mg/L) 18 790 830 1,000 1,000 
Color (Pt.Co) 2.50 33 7.0 15 15 
Total hardness (mg/L) as CaCO3 250 270 500 200 
Sulfate (mg/L) 2.0 84 90 400 500 
Chloride (mg/L) 5.0 160 170 250 200–300 
Sodium (mg/L) 1.50 10.30 18.70 200 200 
Total coliform No/100 mL) Nil 200 250 Nil Nil 
Sampling source
Water quality standards
S/NParameterMnyundo Pr. School RWHSRiverBoreholeTZWHO
pH 6.58 7.38 7.32 6.50–8.50 6.5–9.5 
Total dissolved solids (mg/L) 18 790 830 1,000 1,000 
Color (Pt.Co) 2.50 33 7.0 15 15 
Total hardness (mg/L) as CaCO3 250 270 500 200 
Sulfate (mg/L) 2.0 84 90 400 500 
Chloride (mg/L) 5.0 160 170 250 200–300 
Sodium (mg/L) 1.50 10.30 18.70 200 200 
Total coliform No/100 mL) Nil 200 250 Nil Nil 

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