Cave monitoring data from Cueva Llanio, Matienzo, Northern Spain, collected between February 2023 to April 2024

Cave monitoring data from Cueva Llanio, Matienzo, Northern Spain, collected between February 2023 to April 2024. Monitoring parameters consist of drip water temperature, conductivity, pH and chemical composition, all measured as spot samples on collated drip waters. Chemical composition can be detailed as nitrate, phosphorus, inorganic carbon, calcium, magnesium, sodium, potassium and strontium content of the drip waters. Values of drip water oxygen and deuterium isotopes are also presented. Cave air temperature and drip rate are also logged as continuous data and presented for the duration of cave monitoring.