S/N

Borehole name

Average F (mg/l)

Main aquifers

1

Mogon community

8.798

Basalt and clay

2

Pistis school

19.369

Tuff and Phonolites

3

Mother Kelvin

3.72

Basalt and clay

4

Ainabtich

5.533

Phonolites and clay

5

Kiamunyi estate

18.591

Trachyte and pumice

6

Ngata Mbaruk

1.737

Un weathered Tuff and clay

7

Umoja Kikapu

2.907

Sandy soil and clay sediments

8

Kwa Annah

3.315

Trachyte and Phonolites

9

Egerton Sunrise

4.000

Pumice and Tuff

10

Njoro Canning

5.896

Phonolites, pumice and clay

11

Beston

3.414

Phonolites and un weathered Tuff

12

Nesuit Pri School

3.000

Tuff and clay