https://ijmri.de/index.php/jmsi
volume 4, issue 6, 2025
66
AIR POLLUTION IN NAVOIY CITY DURING 2016–2017 AND ITS ANALYSIS
Toshturdiyev Nurbek Nurali ugli
National University of Uzbekistan named after Mirzo Ulugbek
Faculty of Physics, Department of Hydrometeorology
3
rd
year student
Phone: +998 88 910 42 46
Email:
nurbektoshturdiyev86@gmail.com
Abstract:
This scientific article analyzes the concentration of air pollutants in the atmosphere of
Navoi city during the years 2016 and 2017, with a particular focus on the monthly fluctuations of
these pollutants. The study also highlights the number of days when nitrogen oxides—one of the
most harmful gases for residential areas—exceeded the permissible limits. Based on the obtained
results, the article provides general conclusions, along with practical suggestions and
recommendations for improving air quality.
Keywords:
Navoi city, atmosphere, air pollutants, nitrogen oxides, sulfur dioxide, carbon
monoxide, ammonia, phenol.
In recent years, the rapid development of industrial enterprises in the city of Navoiy has made
the study of its environmental condition a pressing scientific issue.
The increasing population density, growth in industrial capacities, and the rising number of
vehicles all have a direct impact on the quality of atmospheric air. In particular, the
environmental changes observed in Navoiy city during the years 2016–2017, the volume of
pollutants emitted into the air during this period, and their spheres of influence require a
thorough analysis.
Although many scientific articles provide general analyses of air pollutants, their specific effects
under local conditions—especially the role of industry-specific sources in Navoiy—have not
been sufficiently addressed. For this reason, this article is dedicated to conducting an in-depth
analysis of the main causes of air pollution in Navoiy during 2016–2017, taking into account the
city’s unique geo-economic and ecological characteristics.
The main objective of this study is to identify the dynamics of harmful substances found in the
air during these years and to reveal their real impact on human health and the environment.
This approach aims not only to evaluate the situation based on statistical indicators, but also to
create a scientific foundation for developing effective strategies to combat the existing
environmental problems.
Let us now analyze the results of observations conducted in the research area.
Table 1.
Average Monthly Concentration of Air Pollutants in Navoiy City for 2016 (mg/m³)
No Month
Dust Sulfur
Dioxide
Carbon
Monoxide
Nitrogen
Dioxide
Nitric
Oxide
Phenol Ammonia Ozone
1
January
0.1
0.002
1
0.04
0.03
0.001
0.02
–
https://ijmri.de/index.php/jmsi
volume 4, issue 6, 2025
67
2
February
0.1
0.002
1
0.05
0.05
0.001
0.03
–
3
March
0.1
0.002
1
0.05
0.05
0.001
0.03
–
4
April
0.1
0.002
1
0.05
0.05
0.001
0.02
–
5
May
0.1
0.002
1
0.05
0.04
0.001
0.04
0.015
6
June
0.1
0.002
1
0.05
0.04
0.001
0.04
0.015
7
July
0.1
0.003
1
0.05
0.05
0.002
0.04
0.012
8
August
0.1
0.003
1
0.05
0.05
0.002
0.04
0.013
9
September 0.1
0.002
1
0.05
0.04
0.002
0.03
0.013
10 October
0.1
0.003
1
0.05
0.04
0.002
0.03
0.015
11 November 0.1
0.002
1
0.04
0.04
0.002
0.03
–
12 December 0.1
0.003
1
0.05
0.04
0.002
Table 2.
Average Monthly Concentration of Air Pollutants in Navoiy City for 2017 (mg/m³)
No
.
Month
Dus
t
Sulfur
Dioxid
e
Carbon
Monoxid
e
Nitroge
n
Dioxide
Nitric
Oxid
e
Pheno
l
Ammoni
a
Ozon
e
1
January
0.1
0.003
1
0.04
0.04
0.001
0.04
–
2
February
0.1
0.002
1
0.04
0.03
0.002
0.03
–
3
March
0.1
0.002
1
0.05
0.04
0.001
0.02
–
4
April
0.1
0.002
1
0.05
0.05
0.002
0.03
0.016
5
May
0.1
0.002
1
0.05
0.04
0.001
0.03
0.014
6
June
0.1
0.003
1
0.05
0.05
0.002
0.04
0.017
7
July
0.1
0.004
2
0.05
0.05
0.002
0.05
0.013
8
August
0.1
0.004
1
0.05
0.05
0.002
0.04
0.012
9
Septembe
r
0.1
0.004
1
0.05
0.06
0.002
0.04
0.013
10 October
0.1
0.004
1
0.05
0.05
0.002
0.03
0.012
11 Novembe
r
0.1
0.003
1
0.04
0.04
0.002
0.03
–
12 December 0.1
0.003
1
0.04
0.06
0.002
0.02
–
Monitoring results show that during the years 2016–2017, the concentration of suspended
particulate matter in the air of Navoi city remained relatively stable. This indicator stayed around
0.1 mg/m³ per month throughout the two years, not exceeding the normative limits. This suggests
that either the sources of dust emissions operated steadily or the air purification systems were
functioning efficiently.
https://ijmri.de/index.php/jmsi
volume 4, issue 6, 2025
68
As for carbon monoxide (CO), its level also remained mostly stable at around 1 mg/m³ in both
2016 and 2017, with the exception of July 2017, when it rose to 2 mg/m³. This increase could be
linked to intensified transportation activity or industrial operations. Nevertheless, in general, the
annual concentration of carbon monoxide remained consistent.
In contrast, fluctuations were observed in the concentration of sulfur dioxide (SO₂). In 2016, the
gas levels ranged mainly between 0.002 and 0.003 mg/m³, while in 2017, the concentration
reached up to 0.004 mg/m³ in some months. This indicates an increase in sulfur dioxide levels in
2017 compared to the previous year. The rise was particularly noticeable in the summer months,
possibly due to increased industrial activities or intensified operation of thermal power plants.
Based on this analysis, it can be concluded that while the concentrations of some harmful gases
remained stable, there was a notable upward trend in certain pollutants, such as sulfur dioxide.
This trend is critical for assessing the year-on-year changes in air pollution levels and highlights
the need for implementing effective environmental protection measures.
During the period of 2016–2017, the concentrations of nitrogen dioxide and phenol—
classified as air pollutants—were recorded at relatively consistent levels in the atmosphere over
the territory of Navoi city. Notably, the phenol concentration at the beginning of 2016 was
slightly lower; however, by the end of that year, its value aligned with the levels recorded
throughout 2017. This trend indicates a gradual increase in phenol emissions during the observed
period, eventually stabilizing at a higher concentration level.
During the 2 years of observation in 2016-2017, no significant fluctuations in gas values
were observed. Also, based on the results observed during the 2 years, observations were
recorded that the amount of nitrogen dioxide exceeded the norm in residential areas. In particular,
5 observations were recorded in May 2016, 3 in July, 2 in September, and 4 in October.
Similarly, in 2017, such values were recorded by month, as follows: 2 in May, 2 in June, 3
in July, and 6 in August. Exceeding the norm of such polluting gases in the air can lead to
various negative consequences. In conclusion, it can be said that when comparing and analyzing
the results of 2 years of observation in the studied area, we can see that the amount of harmful
gases in the air has increased. One of the most important tasks is to warn the necessary
organizations and the population to prevent such situations. Therefore, studying the composition
of atmospheric air and further strengthening measures to monitor it are considered to be one of
the effective solutions to this problem.
REFERENCES:
1. Monthly reports on the state of atmospheric air in Navoi city in 2016-2017. Navoi regional
hydrometeorological department.
2. Reports of the Navoi regional ecology and environmental protection department, 2015.
3. Annual review of atmospheric air pollutants in Navoi city in 2016-2017. Navoi regional
hydrometeorological department.
4. “Atmospheric air pollution and human health” – Tashkent, 2014.
5.
