Dr. Andrej Mošať
Principal Investigator
Chief Innovation Officer, Water Quality at Meratch. Leads the AquaSensIO probe and its validation against accredited references.
Two lab tests a year.
363 days unwatched.
Water from the public supply is tested routinely. Water from a private well is tested by no one; the owner alone is responsible. The recommended check is a lab test twice a year: two snapshots out of 365 days.
The contaminants that matter most, such as nitrate, have no taste, colour or smell. They move with rain, fertilising seasons and drought. It hits hardest for families with infants and small children on well water, and for villages and farms that depend on groundwater.
1 in 3 well samples
Well-water samples analysed by Slovak public-health authorities over the last 10 years: about one in three had elevated nitrate.
ÚVZ SR
1 in 10 on their own
Roughly one in ten people in Slovakia is not connected to a public water supply (89.6 % connected, 2021). Most rely on their own well.
ÚVZ SR
14.1 % over the limit
Share of EU groundwater monitoring stations above the 50 mg/l nitrate limit in 2016–2019, with no improvement on 2012–2015.
EEA / European Commission
A quiet probe in the well. A clear answer on your phone.
AquaSensIO is a solar-powered probe that stays in the well and measures the water around the clock. Data travel via satellite IoT into the IoT Hub app, so no mains power, Wi-Fi or mobile coverage is needed. Instead of one lab result a year, you see a trend and get a warning when the water changes. It does not replace the laboratory. It tells you when a lab test is worth doing.
Measure in the well
The probe reads the well water continuously, day and night. Solar power and satellite IoT keep it running without mains, Wi-Fi or mobile signal.
Evaluate the trend
IoT Hub turns raw readings into clear trends and spots departures from your well's normal.
Alert: time for a lab test
When the water changes after heavy rain, fertilising or drought, you get a notification and know it is time for a lab test.
AquaSensIO
The vision
Continuous, independently validated water-quality data for any well, anywhere, so every family, village and farm knows what it drinks. Health through safely potable, crystal-clear water.
What we measure, and how far each one is.
Each parameter carries its real status. Some are validated, some are still in development, and the page says which is which.
Our rule: a parameter is called “validated” only after comparison with an accredited reference.
Dissolved oxygen
Validated
Temperature
Validated
Water level
Available
Nitrate
In development
UV absorbance incl. UV254
Validation in progress
Turbidity (NTU)
Validation in progress
Built for everyone who drinks, supplies or studies groundwater.
Well owners & families
Households, cottages and gardens that drink from their own well.
Municipalities & small water utilities
Villages without full public supply; operators of local sources.
Water supply companies
Early detection and warning, because removing nitrate is technically demanding and expensive.
Farmers & agri-businesses
Irrigation and livestock wells, nitrate-vulnerable zones.
Research, labs & river-basin managers
Continuous groundwater data between sampling campaigns.
System integrators & IoT partners
Water-quality data integrated into their own monitoring platforms.
Honest about the stage.
Dissolved oxygen and temperature have passed first field validation in wells in Slovakia against an accredited reference. Nitrate, UV absorbance and turbidity are in development, with validation in progress. The next step is a 10-unit pilot in Q4 2026.
Field validation
Dissolved oxygen & temperature, in Slovak wells
Sensor validation
Nitrate, UV254 & turbidity, in progress now
Pilot
10 units in real wells, Q4 2026
Available
Open to well owners, municipalities & utilities
Behind every alert is a real scientist.
Dr. Mária Bubeníková
Project advisor
Laboratory Supervisor at VÚVH, advising the project in a personal capacity.
