local agenda 21 local plan for sustainable development of bistriþa ...

In conclusion, water supplied by the distribution
network of Bistrita municipality appears to be safe. No
hydric epidemics were recorded during the period
mentioned.
The Bistrita River
Water quality in the last three years
100%
80%
60%
40%
20%
0%
2001 2002 2003
- Monthly water sampling for the “Bistrita intake”
section was organised in 2003 in order to determine
the quality of the fresh surface waters used in drinking
water in Bistrita municipality. Laboratory
measurements include physical, chemical and
microbiological analysis. Data processing was
performed according to the “Quality standards
obligatory for surface waters used in drinking water
production” and the “Standards related to the
measurement methods and sampling frequency and
analysis of water samples used in producing drinking
water”, approved by H.G. 100/07.02.2002.
The following resulted from the interpretation of data
from monthly sampling campaigns in the section
where drinking water is produced:
- the water quality in this section is of category A2
from a physical and chemical point of view due to
values recorded under the ammonium indicator. The
following indicators also recorded values higher than
category A1: suspensions (January, March – 2
samples), CCO-Cr (March – 3 samples, April, July and
October), CBO5 (October) and Mn (January).
In terms of microbiological indicators, the following
was observed:
Bacteriological
excesses
Chemical excesses
Total samples
20
MUNICIPALITY
- For colibacilus, the sampling done in March,
April, October and November place the water quality
in category A2 (542÷4,900 coli/100ml). In May, June,
July, August, September and December the water
quality was category A3 (5,420÷16,090 coli/100ml).
- For all samples, values for faecal coli, faecal
streptococcus and salmonella place the water quality
in category A1.
• The slow flux and the fast daily and weekly
information flow, part of the fast information flow of the
National Water Quality Monitoring, which measures
surface running water quality and the impact of
pollution, was performed at the Sarata section of the
river Bistrita.
The data provided shows there were situations when
discharged water was insufficiently cleaned by
industrial firms and public administration services.
The following situations were recorded and compared
with the ‘Standard for reference objectives in
classifying the quality of surface waters’:
Sarata section: the minimum value recorded for the
indicator CCO-Mn was 2.8mg/l, while the maximum
value was 11mg/l. In April and July, the recorded
value of CCO-Mn of 11 mg/l was higher than M.A.C.
compared to the 2nd quality category (reference
objective, 10mg/l) due to the hydrological and weather
conditions in that period.
+
As for N-NH4 indicator, the minimum value recorded
was 0.54 mg N/l, while the maximum value was
10.66mg N/l. The continuous exceeding of this
indicator compared with the 2nd quality category