| Year | Type | Gazakh-Ganja (17) | Guba-Khachmaz (7) | Lankaran-Astara (2) | Shirvan (17) | All Azerbaijan (43) |
|---|---|---|---|---|---|---|
| 2001 | BOD | 1.59 | 1.1 | 1.22 | 1.78 | 1.57 |
| 2002 | BOD | 1.94 | 1.78 | 1.32 | 2.1 | 1.95 |
| 2003 | BOD | 1.91 | 1.64 | 1.38 | 2.21 | 1.96 |
| 2004 | BOD | 1.88 | 1.5 | 1.44 | 2.32 | 1.97 |
| 2005 | BOD | 2.17 | 1.81 | 1.45 | 2.26 | 2.11 |
| 2006 | BOD | 2.39 | 2.27 | 1.81 | 2.55 | 2.4 |
| 2007 | BOD | 2.39 | 2.26 | 1.91 | 2.16 | 2.25 |
| 2008 | BOD | 2.31 | 2.17 | 1.8 | 2.24 | 2.23 |
| 2009 | BOD | 2.23 | 2.07 | 1.68 | 2.32 | 2.22 |
| 2010 | BOD | 2.27 | 1.7 | 1.81 | 2.55 | 2.26 |
| 2011 | BOD | 1.6 | 1.26 | 1.55 | 1.57 | 1.53 |
| 2012 | BOD | 1.05 | 1.15 | 1.12 | 1.03 | 1.06 |
| 2013 | BOD | 1.22 | 1.31 | 1 | 1.01 | 1.14 |
| 2014 | BOD | 1.59 | 1.43 | 1.04 | 1.37 | 1.45 |
| 2015 | BOD | 1.37 | 1.39 | 1.02 | 1.31 | 1.33 |
| 2016 | BOD | 1.5 | 1.19 | 1.01 | 1.34 | 1.36 |
| 2017 | BOD | 1.6 | 1.19 | 1.01 | 1.35 | 1.41 |
| 2001 | Ammonium | 0.08 | 0.04 | 0.03 | 0.11 | 0.08 |
| 2002 | Ammonium | 0.16 | 0.05 | 0.09 | 0.14 | 0.13 |
| 2003 | Ammonium | 0.13 | 0.07 | 0.07 | 0.12 | 0.12 |
| 2004 | Ammonium | 0.1 | 0.09 | 0.06 | 0.11 | 0.1 |
| 2005 | Ammonium | 0.12 | 0.08 | 0.07 | 0.1 | 0.1 |
| 2006 | Ammonium | 0.1 | 0.08 | 0.06 | 0.11 | 0.1 |
| 2007 | Ammonium | 0.1 | 0.08 | 0.06 | 0.09 | 0.09 |
| 2008 | Ammonium | 0.16 | 0.13 | 0.1 | 0.13 | 0.14 |
| 2009 | Ammonium | 0.23 | 0.17 | 0.12 | 0.2 | 0.2 |
| 2010 | Ammonium | 0.22 | 0.21 | 0.15 | 0.17 | 0.2 |
| 2011 | Ammonium | 0.32 | 0.22 | 0.15 | 0.22 | 0.25 |
| 2012 | Ammonium | 0.27 | 0.19 | 0.15 | 0.22 | 0.23 |
| 2013 | Ammonium | 0.29 | 0.21 | 0.16 | 0.19 | 0.23 |
| 2014 | Ammonium | 0.24 | 0.21 | 0.17 | 0.19 | 0.21 |
| 2015 | Ammonium | 0.14 | 0.18 | 0.17 | 0.17 | 0.16 |
| 2016 | Ammonium | 0.16 | 0.09 | 0.16 | 0.16 | 0.15 |
| 2017 | Ammonium | 0.15 | 0.08 | 0.16 | 0.11 | 0.12 |