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Agenda 2030 - List Of Indicators
Proportion Of Bodies Of Water With Good Ambient Water Quality
Indicator detail
6.3.2 Proportion of bodies of water with good ambient water quality
Metadata
| Relevance/rationale of the indicator (resp. why the indicator was chosen to measure the target and how it is suitable for these purposes) | Good quality of surface and groundwater bodies is essential for the effective protection of aquatic and water-related ecosystems and the services they provide, including: the preservation of biodiversity; the protection of human health during recreational use and through the provision of drinking water; the support of human nutrition through the provision of fish and water for irrigation; the enabling of a variety of economic activities; and the strengthening of the resilience of people against water-related disasters. Indicator 6.3.2 provides a mechanism for determining whether, and to which extent, water quality management measures are contributing to the improvement of water quality over time. |
| Target value of the indicator and its evaluation | 100 % of surface and groundwater bodies are of good quality and used in a sustainable way. |
| Definition | Proportion of surface and groundwater bodies in the country that have good water quality. Quality refers to natural untreated water in rivers, lakes and groundwater sources and is a combination of natural influences together with the impacts of all anthropogenic activities. |
| Measuring unit | % |
| Indicator disaggregation | By water body type and river basin district |
| Reference period (resp. the period to which the indicator relates) | Three years |
| Related geographical area | CZ (NUTS 0) |
| Comment | For groundwater, the share is calculated by area, not by number, as individual bodies differ greatly in area (min. approx. 8 km²; max. 6,500 km²), so the share of areas is generally used for them (small bodies are more often more polluted). It is true that the limits and procedures have changed for surface waters mainly between 2010–2012 and 2016–2018, so they cannot simply be compared. Thus, the lower number of surface water bodies of good quality in the recent period does not mean that the quality has deteriorated, but that stricter limits and less favorable procedures have started to be used (previously bodies without monitoring were automatically classified as good, but this is no longer the case and significantly changed). 2010–2012: for groundwater it is the period 2007–2012 2016–2018: for groundwater it is the period 2013–2018 |
| Update periodicity | Every three years |
| Time coverage since | 2010 |
| Time coverage until | 2021 |
| Time series available at the data provider since | 2010 |
| Data publication date (resp. the date when the data provider publishes (regularly) data; it is given in the format T + the number of days, months or years when T is the end of the reference period) | T+5m |
| Contact point - data provider - e-mail | Tomas.Gremlica@mze.gov.cz |
| Contact point - data provider - name | Tomáš Gremlica |
| Data source | Ministry of Agriculture of the Czech Republic |
| Data origin | |
| Links to detailed metadata or methodology | https://unstats.un.org/sdgs/metadata/files/Metadata-06-03-02.pdf |
| Links to international comparison |