Hand Pump Water Depth — How Deep Are Hand Water Pumps Drilled?
A hand water pump draws clean groundwater from approximately 30 metres below the surface. The exact depth varies by location and is determined by a hydrogeological survey before installation begins. The £150 donation covers drilling to whatever depth is required for the specific site.
Typical Drilling Depth
~30 metres
Average borehole depth for hand pumps
Range: 10-45 metres depending on location
The 30-metre figure represents a typical depth across HNCO's installation regions. In practice:
- 10-20 metres — Common in alluvial plains of Pakistan's Punjab and Sindh provinces where water tables are higher
- 25-35 metres — Standard depth in most rural areas with moderate groundwater levels
- 35-45 metres — Required in some arid regions of Africa and Pakistan's Balochistan
Why Drilling Depth Matters
The depth of a borehole directly affects water quality and supply reliability:
Water Quality
Deeper water is naturally filtered through layers of soil and rock, removing most contaminants. Surface water (under 10 metres) often contains bacteria and parasites from agricultural runoff and animal waste. Groundwater at 20+ metres is typically safe to drink without treatment.
Supply Reliability
Shallow water tables can drop during dry seasons, causing pumps to run dry. Boreholes drilled to the sustainable aquifer level (typically 20-30 metres) provide year-round water regardless of rainfall patterns.
Pump Functionality
Hand pumps work through suction and can only lift water from depths up to approximately 45 metres. Beyond this, the physical effort required becomes impractical, and solar pumps with motorised submersible systems are needed.
How Depth Is Determined
Before drilling begins, HNCO's local partners conduct a site survey to determine the optimal borehole depth. This process includes:
- 1
Geological assessment
Reviewing existing data on water table levels in the region
- 2
Test drilling
In uncertain areas, a test borehole confirms water presence before full installation
- 3
Water quality testing
Samples are tested for contaminants, salinity, and mineral content
- 4
Yield testing
Confirming the aquifer can sustain extraction for 4 families' daily needs
This survey process is part of why water pump projects take time — rushing to drill without proper assessment can result in dry boreholes or contaminated water.
What If Water Is Too Deep?
Hand pumps have a practical maximum depth limit of approximately 45 metres. Beyond this:
- ✗The pumping effort becomes too strenuous for regular use
- ✗Water output decreases significantly with each additional metre
- ✗Wear on components increases, reducing pump lifespan
In areas where the water table exceeds 45 metres, HNCO installs solar water pumps instead. Solar pumps use submersible electric motors that can draw water from 100+ metres without physical effort.
Water Depth by Region
| Region | Typical Depth | Notes |
|---|---|---|
| Punjab, Pakistan | 10-25m | High water table in irrigated areas |
| Sindh, Pakistan | 15-30m | Variable by proximity to Indus |
| Balochistan, Pakistan | 30-50m+ | Arid region, often needs solar |
| East Africa | 20-40m | Varies by geology |
| West Africa | 15-35m | Generally accessible depths |
Fund clean groundwater access
Your £150 donation covers drilling to whatever depth is required for the site — typically 20-35 metres to reach clean, reliable groundwater.