As a whole, wastes of polluting substances in atmosphere have much decreased during period 1989-95 from:


The analysis of volumes of
outbursts of polluting substances in atmosphere shows that in Kyrgyzstan
about 94% of all thrown polluting substances are of the main impurities
(in 1995). Sold substances (soot, ash, dust) outbursts of which are 45.6%
have the greatest specific weight among them. Outbursts of sulphur dioxide
are 28.6%, of carbon oxide are 13.6% from all taken into account polluting
substances. The least significant are outbursts of nitrogen oxide - 6.1%
from total volume of outbursts.
Hydrocarbons are on the
basic place among specific substances. A portion of other taken into account
anthropogenic impurities in atmosphere in this period was a little more
than 3% from a total volume of outbursts.
The similar ratios of polluting substances were observed in previous
years (1989-94).
The analysis of change of
average concentration of the basic polluting substances in atmospheric
air for 1992-97 in Bishkek has shown the tendency to reduction of sulphur
dioxide in atmosphere. The concentration of other polluting substances
grows.


In other cities of the republic (Osh,
Kara-Balta) a tendency to increase of pollution of atmosphere by a dust,
carbon oxide, nitrogen dioxide and oxide, formaldehyde is also marked that
is explained by growing park of motor transport.
The special concern is caused
by a growth of pollution of atmospheric air by benzo(a)pyrene, a highly
poisonous substance. So, as a whole on Bishkek, its concentration in 1996
(25.05 ng/m3) was twice more than in 1993 (8.35 ng/m3).
Thus, despite a decrease of total quantity of polluting substances
for period of 1989-95, an atmosphere pollution still represents an ecological
danger. The reason consists in decrease of amount of gas fuel, use of high-ash-bearing,
high-sulphur, low-quality coals, inefficient work of gas and dust purifiers.
.
Observations on a presence
of heavy metals in atmospheric air, spent in 1990 and 1996 in a number
of cities of the republic, have shown that their concentration on the order,
and sometimes on two orders, is lower than extreme allowable concentration

Recently, one of the widespread phenomena
which results in essential ecological changes on territories of various
scale is a falling loss of acid rains.
Study of spatial laws and
temporary tendencies of acid falling and chemical composition of atmospheric
precipitation for a number of cities of Kyrgyzstan during period 1991-94
has shown that a meaning of pH varies from 6.03 up to 7.67. This speaks
about presence of low-acid and neutral environment in them.
| City | Value of pH | Sum of ions, ìã/ë |
| Bishkek | 6,8 | 24,2 |
| Kara-Balta | 6,7 | 24,2 |
| Talas | 6,5 | 37,7 |
| Karakol | 7,3 | |
| Sari-Chelek | 6,8 | |
| Uzgen | 6,7 | 38,6 |
| Narin | 6,8 | 125,8 |
| Pokrovka | 5,9 | 37,1 |
The main contribution to formation of chemical composition of precipitation bring in anions of sulphur hydrocarbon, nitrate and cations of calcium at the average meanings of mineralisation of precipitation in cities of the republic from 24.2 up to 125.8 mg/l.
