Rate of gst applicable on digging borewell along with giving pumpset and installing it

As per Notification 2/2018 CT (R)
Composite supply of goods and services in which
the value of supply of goods constitutes not more
than 25 per cent. of the value of the said composite
supply provided to the Central Government, State
Government or Union territory or local authority
or a Governmental authority or a Government
Entity by way of any activity in relation to any function entrusted to a Panchayat under article 243G of the Constitution or in relation to any function entrusted to a Municipality under article 243W of the Constitution Is Exempted .
So if your services cover under above it's Exempted.