Sustainable Development Goals - 17 Goals to Transform our World

Conserve and sustainably use the oceans, seas and marine resources for sustainable development

Indicator 14.3.1.a: Average Lake Sevan acidity (pH) measured at agreed suite of representative sampling stations

Average Lake Sevan acidity (pH) measured at agreed suite of representative sampling stations


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Headline data

This table provides metadata for the actual indicator available from Armenia statistics closest to the corresponding global SDG indicator. Please note that even when the global SDG indicator is fully available from Armenian statistics, this table should be consulted for information on national methodology and other Armenian-specific metadata information.

Indicator available
Indicator description

14.3.1global indicator is mainly based on observations that contain/limit the carbon system required to determine the variability of water acidity in a water management zone. The carbon system in this context refers to 4 main measurable indicators. pH (sliding scale hydrogen ion concentration), CT (total dissolved inorganic carbon), pCO2 (partial pressure of carbon dioxide) and AT (total alkalinity).Only pH is presented as a national indicator.

Geographical coverage


Unit of measurement

mole - H - ion/liter


Acidification of Lake Sana’a water is the decrease in water pH over a period of decades or more that results mainly from the absorption of carbon dioxide from the atmosphere. Water area services These are the benefits provided by the lake to people, which can be recreational, economic, environmental (providing coastal protection) or cultural. pH is the average annual value. Representative sampling stations are those stations that: 1) have a frequency of measurement sufficient to convey important information on changes in the acidification of the carbonates in the chemical composition of the lake և trends of impacts on water systems; 2) Ensures sufficient data quality and comprehensive metadata information to enable integration with data from other stations in the country. For the monitoring of Lake Sevan, sampling is carried out at 17 observation points, twice a year, both from the lake surface and from different depths.


The value of the indicator is obtained by means of a corresponding measuring device

Comments and limitations

Link to SDG 14.3.1 global indicator

Data last updated 2020-08-24: see changes on GitHub opens in a new window
Metadata last updated 2021-02-01: see changes on GitHub opens in a new window

This table provides information on metadata for SDG indicators as defined by the UN Statistical Commission. Complete global metadata is provided by the UN Statistics Division.

Indicator name

Average Lake Sevan acidity (pH) measured at agreed suite of representative sampling stations

Global indicator name
Indicator number


Global indicator number
Target name
Target number


Global indicator description
UN designated tier
UN custodian agency
Link to UN metadata
Organisation Ministry of Nature Protection of RA
Link to data source
Contact details
Other information