Last update of indicator 13.12.2021
The indicator describes the groundwater quality within the basic and operational monitoring.
1. Enough clean water for everyone
1.1 The prevention of water pollution
1.3. Elimination of adverse impacts on water courses
Orientation, Principles and Priorities of the Slovak Republic Water Management Policy by 2027 (2016)
3. PRINCIPLES AND PRIORITIES OF THE SLOVAK REPUBLIC WATER MANAGEMENT POLICY BY 2027 AND FRAMEWORK PROCEDURES IN ACHIEVING THE OBJECTIVES:
With a view to water status improvement:
In order to ensure the efficient use of water resources:
6.2.1. Environmental target for underground water bodies is to perform measures aimed at:
Strategy of SR adaptation to adverse impacts of climate change (2018)
5. Strategy objectives
To propose appropriate set of proactive adaptation measures and mechanisms to their implementation within the framework of sectoral policies, development strategies and action plans at all levels of the process;
8. Proposed adaptation measures in individual areas
8.5.3. Water management
Adaptation measures in our country should be directed to the compensation of drought manifestations, i.e. the decrease of flows and water resource yields, as well as to minimization of adverse consequences of flooding, particularly of flash floods in mountain and foothill areas. Adapting to the climate change in water management area should be focused on the implementation of measures leading to the creation of conditions for the better management of runoff in the river basin.
Water is becoming a critical strategic resource of the country which must be protected, and its efficient and effective use must be managed, in accordance with an objective to ensure the sustainable development. Rightly, the biggest attention is paid to water resources, their conservation and the need for more efficient use.
Measures to prevent degradation of water by contamination
- reducing contaminants in water bodies in accordance with the Slovak Water Plan
|Change since 2005||Change since 2015||Last year-on-year change|
Since 2007, the groundwater quality has been monitored in quaternary and pre-quaternary groundwater bodies within the basic and operational monitoring. The evaluation of the condition of underground water bodies is performed by evaluating their chemical and quantitative status.
In both types of monitoring the issues of adverse oxidation-reduction conditions. The percentage of oxygen saturation was the most frequent unsatisfactory indicator in all quaternary water bodies.
|In both types of monitoring the issues of adverse oxidation-reduction conditions (increased concentrations of Fe, Mn) stand out.|
Monitoring of groundwater chemical status was divided into:
The issue of unfavourable oxidation-reduction conditions comes to the fore in the monitoring of the groundwater in Žitný ostrov, as indicated by frequent elevated concentrations of total iron, manganese and ammonium ions.
The predominant nature of land use in the monitoring area (urbanised and agricultural land use) translates into elevated levels of oxidised and reduced forms of nitrogen in the waters. In addition to these indicators, the influence of anthropogenic pollution on groundwater quality is indicated by the exceeded threshold limit values of Cl- and SO42-. Exceedances of the SO42- (sulphates) threshold limit value were recorded in a total of 15 cases.
Increased concentrations of arsenic (20 times) and lead (1 time) were recorded in the trace element group in the 2019 and 2020 monitoring period. For the other monitored trace elements, no exceedance of the threshold limit values given by the Decree of the Ministry of Health of the Slovak Republic 247/2017 Coll. was recorded.
Of the pesticides, atrazine exceeded the limit concentration in 2019 (1x) in object 7215 Malinovo. In 2020, atrazine (6 times) and desethylatrazine (5 times) were the most frequent contributors to groundwater contamination. Other pesticides that exceeded the limit in 2020 include promethrin, terbutryn and tebuconazole.
Of the polyaromatic hydrocarbons, naphthalene was the most frequently exceeded concentration in both years (2019 and 2020). In 2019 - 62 times (with a maximum measured concentration above 0.700 µg/l) and in 2020 - 22 times (with a maximum concentration above 0.160 µg/l on the premises). Of the other monitored indicators in this group, the limit values for phenanthrene were exceeded (2 times in 2019). In 2019, an above-limit concentration was recorded at 605990 Čalovec - Kameničná for the parameters acenaphthene, benzo(b)fluoranthene, benzo(k)fluoranthene, chrysene, phenanthrene, fluoranthene, fluorene, naphthalene, pyrene and sum of polyaromatic hydrocarbons (PAHs represents the sum of the real measured values of benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(g,h,i)perylene and indeno(1,2,3-c,d)pyrene).
In the group of volatile aliphatic hydrocarbons, vinyl chloride (chloroethylene) exceeded the threshold limit value set by Decree 247/2017 Coll. of the Ministry of Health of the Slovak Republic, especially in 2020.
Most of the specific organic substances monitored were determined below the detection limit of the analytical method used.
The evaluation of the condition of underground water bodies is performed by evaluating their chemical and quantitative conditions.
Out of the total number of 75 underground water bodies, the following bodies have been evaluated:
The good chemical condition was indicated in 85.3% of underground water bodies, i.e. 77.9% of the total area of bodies. The bad condition was indicated in 14.7% of underground water bodies, i.e. 22.1% of the total area of units.
The evaluation of the quantitative condition of underground water bodies is the assessment of the influence of documented impacts on the underground water bodies as a whole. The basic indicator of the quantitative condition of underground water bodies was determined to be the stabilized regime of the underground water level (or abundance of springs); the others included the balance evaluation of quantities of underground water and changes in the underground water regime based on the monitoring programme results. In the Slovak Republic, four underground water bodies were included in the bad quantitative condition.