Sustainable Groudwater (Borehole) and Gold Exploration Services
EvaGo Geoconsulting is an independent geoscience practice based in Nairobi, delivering hydrogeological and borehole services alongside mineral exploration support — from first reconnaissance to final report.
What we do
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ABOUT EVAGO
Welcome to EvaGo Geoconsulting Ltd.
EvaGo Geoconsulting was founded in 2020 to close the gap between subsurface data and the decisions that depend on it — where to drill, how deep and where to explore, and at what cost. We work across Kenya and the wider East African region, pairing hands-on fieldwork with rigorous geochemical and geophysical modelling.
Our team moves between two worlds that are usually kept separate: groundwater and minerals. Both start with the same question — what is beneath the surface — and both demand the same discipline in survey design, data interpretation, and reporting that clients can act on.
At EvaGo, we are true sustainability consultants, combining deep expertise with practical delivery.
Field-grounded
Every model we build is anchored to survey data and rock we have logged ourselves — not assumptions borrowed from elsewhere.
Data-driven
Geophysics, geochemistry and hydrogeology are interpreted together, using recognised methods and software, not one in isolation.
Regionally fluent
We understand Kenyan and regional regulatory processes, so recommendations are realistic to permit and to drill.
Our approach
Desk study & reconnaissance
We review existing geological, hydrological and geophysical data for the site and surrounding area before any fieldwork begins.
Field survey
Ground geophysics, geological mapping and sampling are carried out to the standard the project's data will later be judged against.
Analysis & modelling
Survey results are processed and interpreted — from sub-surface modelling to mineral reserve estimates.
Reporting & recommendation
Findings are delivered as a clear, decision-ready report: where to drill, where to explore further, and why.
Two disciplines. One standard of field and data rigour.
Hydrogeological & Borehole Siting Surveys, Borehole Drilling
Groundwater potential mapping
Desk and field assessment of an area's groundwater prospects ahead of any drilling commitment.
Geophysical borehole siting (ERT / VES)
Electrical resistivity tomography and vertical electrical sounding to locate the most viable borehole drill point.
Hydrogeological assessments
Aquifer characterisation, recharge and yield sustainability studies for domestic, agricultural and industrial supply.
Borehole drilling & Supervision
Borehole drilling services as well as independent oversight of drilling contractors, casing design and construction to protect the client's investment.
Pump testing & Yield analysis
Step-drawdown and constant-rate testing to confirm sustainable abstraction rates before handover.
Water quality sampling & EIA support
Physicochemical sampling and documentation to support NEMA environmental impact assessment requirements.
Environmental Impact assesment studies for NEMA certification on projects
Mineral Exploration
Geological mapping & reconnaissance
Field mapping of lithology, structure and alteration to define mineral target areas ahead of ground survey.
Geophysical surveys
Resistivity, induced polarisation and magnetic surveys to resolve anomalies associated with mineralisation of e.g, gold, copper and beryllium.
Geochemical sampling & assay coordination
Soil, stream-sediment and rock-chip sampling programmes coordinated with certified assay laboratories to determine mineral concentrations.
Drill-target generation
Integration of geological, geophysical and geochemical datasets into ranked, defensible drill targets or mining targets.
Resource estimation support
Data compilation and QA/QC support feeding into competent-person resource estimation workflows.
Exploration reporting & compliance
Technical reporting for permitting, joint-venture partners and regulatory submission.
Not sure which service fits your project?
The people behind the fieldwork
A small, senior team spanning hydrogeology, exploration geology, geophysics and geochemistry — the full chain from survey design to final report.
Evance Ouma
Hydrogeologist & DirectorLeads groundwater and borehole programmes end to end, from aquifer assessment through drilling and borehole development.
George Jeff Onyango
GeochemistDirects field mapping and target generation for mineral exploration across Africa.
Alima Julius Nyerere
Geophysicist — Geophysical SurveysDesigns and runs ERT, IP and magnetic surveys for both water-siting and mineral exploration work.
Achieng Odero
Geologist & Laboratory LiaisonCoordinates sample chain-of-custody and assay QA/QC between the field and partner laboratories.
Recent Projects
A field register of representative work across hydrogeology, borehole delivery and mineral exploration — each entry logged the way we log a borehole: reference, location, scope.
Gold Prospect Geophysical Survey
Rangwe, Homa Bay County– South Nyanza Greenstone BeltERT and IP survey across multiple profiles, ranking drill targets by chargeability anomaly extent and magnitude, with a phased drilling recommendation delivered to the client.
Borehole Siting for Community Use
Lake Victoria South Water Works Developement Agency– Nyanza, KenyaPQWT and VES survey identifying sevral productive siting targets for a community borehole programmes, followed by drilling supervision through to final casing design.
Rift Basalt Reservoir Characterisation
Baringo– Central Kenya RiftSupported an academic-industry research collaboration assessing the CO₂ mineralisation potential of rift basalts for geological carbon storage, combining whole-rock geochemistry with geophysical modelling of candidate injection zones.
Community WASH Borehole Programme
Nakuru CountySiting, drilling and pump testing for a multi-village domestic water-point programme, delivered in partnership with a county government as the client.
Geological & Geotechnical Assessment of Takawiri Island
Takawiri– Homabay CountyGeological and geotechnical assessment for evaluating the value additon of luecogranites into floor tiles.
Geophysical mapping of Takawiri Island to determine suitable areas for ship/boat docking station
Beryllium Reconnaissance Mapping
Boboro Holdings Investment; Songea– TanzaniaGeological mapping to come up with suitable site for core drilling, geophysical survey and geochemical sampling.
Supervison of the mining and shipment of first 25 tonnes of beryllium ore
Have a project like one of these?
Tell us about your site.
Whether it's a single borehole,Environmental Impact Assessment (EIA) or a full mineral exploration programme, send us a brief and we'll come back with a scope and timeline.
Based in Nairobi, fielding survey and drilling teams across Kenya — and East Africa — and further afield by arrangement.