Raw water source | ||||||
What | Where | When | How | Who | Critical Limit | Corrective action in case critical limit is exceeded |
Conductivity | Raw water storage | Daily | Conductivity meter | Water analyst/manager | 6.0 - 9.0 | Re-assess catchment area |
Turbidity | Raw water storage | Daily | Turbidity meter | Water analyst/manager | Not exceeding 5 NTU | Cleaning of the storage tank, Borehole flushing |
pH | Raw water storage | Daily | pH meter | Water analyst/manager | 6.0 - 9.0 | Regulate activities |
E. coli | Raw water storage | Monthly | MPN test | Microbiologist/Water analyst | <10 | Regulate activities |
Sand and Carbon Filter | ||||||
Turbidity | Filtration outlet | Daily | Turbidity meter | Water analyst/manager | Not exceeding 5 NTU | Backwash |
Total dissolved solids | Filtration outlet | Daily | TDS meter | Water analyst/manager | 600 mg/l | Backwash |
Bacterial count | Filtration outlet | Weekly | Tube method | Microbiologist | 10/l | Back wash |
Reverse Osmosis | ||||||
Electrical Conductivity | Treated water Outlet | Daily | Conductivity meter | Water analyst/manager | 1000 µ/cm | Membrane flushing |
Micro filters | ||||||
Total dissolved solids | Filtration outlet | Daily | TDS meter | Water analyst/manager | 500 mg/l | Change micro filters |
UV Steriliser | ||||||
E. coli | Final treated water | Monthly | MPN test | Microbiologist/Water analyst | <10 | Replace the UV light |
Bacteria count/100 ml | Final treated water | Monthly | Plate count | Microbiologist/Water analyst | <10 | Replace the UV light |