Average ammonium concentration in freshwater in Bulgaria
Bulgaria: Average ammonium concentration in freshwater was 0.2103 milligrams per liter in 2021. ◆ Volatile
Average ammonium concentration in freshwater in Bulgaria, 1992–2021
Source: European Environment Agency (2023) – with minor processing by Our World in Data. Measured in milligrams per liter.
Analysis
The most recent figure for average ammonium concentration in freshwater in Bulgaria is 0.2103 milligrams per liter, measured in 2021.
Compared with earlier readings it is up 38.1% on the previous year and up 135.9% over ten years.
Over the whole period, average ammonium concentration in freshwater in Bulgaria peaked at 0.3149 milligrams per liter in 2002 and was at its lowest, 0.02 milligrams per liter, in 1996.
That places Bulgaria 6th out of 32 countries with data for 2021, putting it in the top quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Average ammonium concentration in freshwater in Bulgaria, year by year
| Year | milligrams per liter | Change |
|---|---|---|
| 1992 | 0.067 milligrams per liter | — |
| 1993 | 0.067 milligrams per liter | +0.0% |
| 1994 | 0.3028 milligrams per liter | +352.2% |
| 1995 | 0.2129 milligrams per liter | -29.7% |
| 1996 | 0.02 milligrams per liter | -90.6% |
| 1997 | 0.2039 milligrams per liter | +920.0% |
| 1998 | 0.2805 milligrams per liter | +37.6% |
| 1999 | 0.199 milligrams per liter | -29.0% |
| 2000 | 0.2329 milligrams per liter | +17.0% |
| 2001 | 0.2796 milligrams per liter | +20.1% |
| 2002 | 0.3149 milligrams per liter | +12.7% |
| 2003 | 0.3142 milligrams per liter | -0.2% |
| 2004 | 0.1454 milligrams per liter | -53.7% |
| 2005 | 0.1791 milligrams per liter | +23.2% |
| 2006 | 0.1741 milligrams per liter | -2.8% |
| 2007 | 0.1154 milligrams per liter | -33.7% |
| 2008 | 0.1552 milligrams per liter | +34.5% |
| 2009 | 0.1346 milligrams per liter | -13.3% |
| 2010 | 0.1246 milligrams per liter | -7.5% |
| 2011 | 0.0891 milligrams per liter | -28.4% |
| 2012 | 0.0942 milligrams per liter | +5.6% |
| 2013 | 0.1376 milligrams per liter | +46.1% |
| 2014 | 0.0668 milligrams per liter | -51.4% |
| 2015 | 0.0727 milligrams per liter | +8.9% |
| 2016 | 0.0877 milligrams per liter | +20.5% |
| 2017 | 0.0785 milligrams per liter | -10.5% |
| 2018 | 0.1638 milligrams per liter | +108.8% |
| 2019 | 0.1193 milligrams per liter | -27.2% |
| 2020 | 0.1522 milligrams per liter | +27.6% |
| 2021 | 0.2103 milligrams per liter | +38.1% |
Bulgaria compared with similar countries
- Bulgaria's 0.2103 milligrams per liter is above the median for Europe & Central Asia, which is 0.0703 milligrams per liter, 3.0× the median. (31 countries reporting)
- Bulgaria's 0.2103 milligrams per liter is above the median for high income countries, which is 0.0673 milligrams per liter, 3.1× the median. (28 countries reporting)
Biggest year-on-year movements
Years where Average ammonium concentration in freshwater in Bulgaria changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 1997 | +920.0% | 0.02 milligrams per liter | 0.2039 milligrams per liter |
| 1994 | +352.2% | 0.067 milligrams per liter | 0.3028 milligrams per liter |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1990s | 0.1691 milligrams per liter | 0.02 milligrams per liter | 0.3028 milligrams per liter | 8 |
| 2000s | 0.2045 milligrams per liter | 0.1154 milligrams per liter | 0.3149 milligrams per liter | 10 |
| 2010s | 0.1034 milligrams per liter | 0.0668 milligrams per liter | 0.1638 milligrams per liter | 10 |
| 2020s | 0.1812 milligrams per liter | 0.1522 milligrams per liter | 0.2103 milligrams per liter | 2 |
Countries ranked near Bulgaria
More environment data for Bulgaria
- Historical exposure to drought — Land soil moisture anomaly -1.39 Percentage change (2025)
- Historical exposure to drought — Cropland soil moisture anomaly -1.52 Percentage change (2025)
- Standard Deviation, annual growth rate 0 % change on previous year (2025)
- Standard Deviation 0.573 °C (2025)
- Temperature change 2.18 °C (2025)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), annual -6.02 % change on previous year (2024)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), per unit 0 Mt CO2e per US$ of GDP (2024)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), per capita 0 Mt CO2e per person (2024)
- Methane (CH4) emissions from Agriculture (Mt CO2e), annual growth rate -0.7509 % change on previous year (2024)
- Methane (CH4) emissions from Agriculture (Mt CO2e), per unit of GDP 0 Mt CO2e per US$ of GDP (2024)
Frequently asked questions
- What is average ammonium concentration in freshwater in Bulgaria?
- Average ammonium concentration in freshwater in Bulgaria was 0.2103 milligrams per liter in 2021, according to European Environment Agency (2023) – with minor processing by Our World in Data.
- What is the highest average ammonium concentration in freshwater recorded in Bulgaria?
- The highest recorded value was 0.3149 milligrams per liter in 2002.
- What is the lowest average ammonium concentration in freshwater recorded in Bulgaria?
- The lowest recorded value was 0.02 milligrams per liter in 1996.
- How does Bulgaria rank for average ammonium concentration in freshwater?
- Bulgaria ranks 6th out of 32 countries with data for 2021.
- Is average ammonium concentration in freshwater rising or falling in Bulgaria?
- Over the last ten years it is up 135.9%. The long-run trend across the full record is volatile.
- Where does this Bulgaria data come from?
- The figures come from European Environment Agency (2023) – with minor processing by Our World in Data, published as part of Average ammonium concentration in freshwater. Statizoid updates them automatically from the source API.
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About this data
Average annual concentration of ammonium in lakes.