Regulation for Classification of Water
The Official Gazette of the Republic of Macedonia No. 18-99
Based on Article 85 paragraph 4 of the Law on waters / " Official Gazette of Republic of Macedonia " No 4/98 / and Article
46 paragraph 3 of the “ Low on the Government of the Republic of Macedonia” / " Official Gazette of Socialistic Republic
of Macedonia " No 38/90 and " Official Gazette of Republic of Macedonia " No 63/94 and 63/98 / the Government of the
Republic of Macedonia on the session held 23.03.199 brought
REGULATION
FOR CLASSIFICATION
OF WATER
Article 1
With this Regulation the classification is made of the surface waters / water courses, natural and artificial lakes / and of
groundwater.
This Regulation shall not apply to mineral and thermal waters.
Article 2
According to the use and the water purity the Water referred to in Article 1, paragraph 1 of this Regulation are delineated
in 5 classes, namely:
Class1
This is very clean, oligotrophic water, which in its natural state which can, with possible disinfecting, can be
used for drinking and production and processing of food product and is suitable for mating and cultivation of
noble types of fish – salmonides. The buffering capacity of the water is very good. It is constantly saturated
with oxygen, with low content of nutrients and bacteria, contains very slight, occasional antropogenic
pollution with organic matters / but not with inorganic matters /;
Class 2 This is a very clean, mesotrophic water, which in its natural state can be used for bathing and recreation, water
sports, production of other types of fish / ciprinides /, or which can be used – after usual methods of purification
/ coagulation, filtration, disinfection etc./–for drinking and production and processing of food products. The
buffering capacity and oxygen saturation is present throughout the yea., are good.The loadings may lead to
slightly increased primary productivity;
Class 3 That is moderately euthrophic water, which in its natural state can be used for irrigation, and after usual
purification methods (conditioning) for industries which do not need drinking water quality. Buffering capacity of
the water is low, bat it maintains the / pH value / acidity at a level still suitable for most fish. In hypolimnion
occasionally oxygen deficit occurs. The level of primary production is considerable, and some changes in
community structure, including fish species can be observed. The load of harmful substances is evident as
well as microbial pollution. The concentration of the harmful substances varies from natural levels to levels of
chronic toxicity for aquatic life;
Class 4 This is strongly euthrophic, polluted water, which in its natural state can be used for other purposes only after
certain processing. The buffering capacity is exceeded, which leads to higher levels of acidity, and which
affects the development of the offspring. In the epilimnion there is oxygen saturation, and in hypolimnion there
is oxygen deficit. Algal blooms are common. Increased decomposition of organic matter at the same time with
the stratification of the water can cause anaerobic conditions and fish death. Mass occurrences of more
tolerant species, fish population and benthic organisms can be affected. Microbiologic pollution does not allow
the water to be used for recreation, at Harmful substances emitted or released from the sediment / deposits /,
can affect the quality of the aquatic life. The concentration of harmful substances can very from level of chronic
to acute toxicity to aquatic life;
Class 5 This is a very polluted, hiperthrophic water. , which in its natural state can be used for other purposes . The
water has no buffer capacity and its acidity / pH value / is harmful for many fish species.Large problems occur
with the oxygen regime, namely saturation in hipolimnion absence of oxygen, leading to anaerobic conditions
in hipolimnion. Decomposers dominate over producers. Fish and bentosic species are constantly not present.
Concentration of harmful substances exceeds acutetoxicity levels for aquatic life.
Article 3
Page 1 of 9
Regulation for Classification of Water
The Official Gazette of the Republic of Macedonia No. 18-99
The indicators for the classification of water into classes according to article 2 of this Regulation are:
A.
B.
C.
Organoleptic Indicators:
Indicator of Acidity:
Oxygen Regime indicators :
D.
E.
Mineralization Indicators:
Eutrofication indicators:
F.
G.
Microbiological Indicators:
Radioactivity :
H.
Harmful and Dangerous Matters:
visible waste, visible color and color, notable smell, turbidity and transparency
pH value and alcality
dissolved oxygen, oxygen saturation, biochemical oxygen demand for 5 days at
20 oC / BOD5 /, chemical oxygen demand from potassium permanganate, total
organic carbon
suspended matters, total dry residue after filtration / total dissolved solids /
total phosphorus, total nitrogen, chlorophyll “a“ , primary production, saprobic
index,level of biological productivity
most probable number thermo-tolerant coliforms bacteria
total activity of heavy radioactive waste materials which can be released into the
surface water - water course during one year, shall be calculated by a separate
formula
metals and their compounds, other inorganic parameters, phenols ,
hydrocarbons, halogenated hydrocarbons , nitrated hydrocarbons , pesticides,
other organic compounds
Article 4
Upper values of indicators from Article 3 of this Regulation are set as follows:
Table I: Upper values / maximum permited values or concentrations / of Organoleptic Indicators:
Indicators:
Upper values and concentrations per class
Class I
Class II
Class III
Class IV
Class V
A. Organoleptic Indicators:
1. Visible waste
2. Visible color
None
None
None
None
None
turbidity
-
3. Notable smell
None
None
4. Color
5. Turbidity NTU
6. Transparency Secci 1 m
< 15
< 0.5
>7
15-25
0.5-1.0
7.0-4.0
None
Little
turbidity
Hardly
notable
26-40
1.1-3.0
3.9-2.0
notable
>40
> 3.0
< 2.0
> 40
> 3.0
< 2.0
Table II: Upper values / maximum permited values or concentrations / of Indicators of Acidity:
Indicators:
Upper values and concentrations per class
Class I
Class II
Class III
Class IV
Class V
6,5-8,5
> 200
6,5-6,3
200-100
6,3-6,0
100-20
6,0-5,3
20-10
< 5,3
< 10
B Indicators of Acidity:
1. pH value
2. Alcality mg/l CaCO3
Table III: Upper values / maximum permited values or concentrations / of Oxygen Regime Indicators:
Indicators:
C. Oxygen Regime Indicators :
1. Dissolved oxygen mg/l O2
2. Oxygen saturation
epilimnion % O2 2
Upper values and concentrations per class
Class I
Class II
Class III
Class IV
Class V
> 8,00
7,99 – 6,00
5,99 – 4,00
3,99 – 2,00
< 3,00
90 - 105
75 – 90
105 - 115
50 – 75
115 - 125
30 – 50
125 – 150
< 30
> 150
1
Given values refer only on lakes and reservoirs
2
Given values refer only on lakes and reservoirs
Page 2 of 9
Regulation for Classification of Water
The Official Gazette of the Republic of Macedonia No. 18-99
hipolimnion % O2 2
Total % O2
3. Biochemical oxygen demand for 5
days at 20 oC / BOD5 / mg/l O2
4. Chemical oxygen demand – permanganate mg/l O2
5. Total organic carbon mg/l C
75 - 90
75 - 90
50 - 75
50 – 75
105 - 115
30 - 50
50 – 30
115 - 125
30 - 10
30 – 10
125 – 150
< 10
< 10
> 150
< 2,00
2,01 – 4,00
4,01 – 7,00
7,01 – 15,0
> 15,0
< 2,50
< 2,50
2,51 – 5,00
2,51 – 4,20
5,01 – 10,0
4.21 – 6.70
10,0 – 20,0
6.71-10.0
> 20,0
> 10,0
Table IV: Upper values / maximum permited values or concentrations / of Mineralization Indicators :
Indicators:
D. Mineralization Indicators :
1. Suspended matter mg/l
2. Total dry residue after filtration /
total dissolved solids –TDS / mg/l:
 Surface water
 Groundwater – karstic
 Groundwater – not karstic
Upper values and concentrations per class
Class I
Class II
Class III
Class IV
Class V
< 10
10 - 30
30 - 60
60 - 100
> 100
350
350
800
500
500
1000
1000
1000
1500
1500
1500
1500
> 1500
> 1500
> 1500
Table V: Upper values / maximum permited values or concentrations / of Eutrofication Indicators :
Indicators:
E. Eutrofication Indicators :
1. Total phosphorus P mg/l
2. Total nitrogen N g/l
3. chlorophyll “a“ g/l
4.Primary production 4gC/m2/a
5. Saprobic
6. Saprobic Index – Puntel Buck
5. Level of biological productivity
Upper values and concentrations per class
Class I
Class II
Class III
Class IV
Class V
<10
/ < 15 / 3
< 200
/ < 200 /
10 – 25
/ 15 – 40 /
200 - 325
/ 200–325 /
25 – 50
/ 40 – 70 /
326 - 450
/ 326-450 /
50 – 125
/ 75 – 190 /
> 450
/ > 450 /
> 125
/ > 190 /
> 450
/ > 450 /
< 2,0
/ < 2,0 /
2,01–3.79
/ 2.01-3.79/
3.79–7.50
/3.79-7.50/
7.51-10.0
/ 7.51-10.0/
> 10.0
/ > 10.0 /
< 25
Oligosaprobic
51-90
Meso
saprobic

2.51-3.50
> 90
 -Meso
saprobicpolisabrobic
3.51-4.50
> 90
Polisaprobic
< 1,50
26-50
Meso
saprobic

1.50-2.50
Oligotrophic
Mesotrophic
Moderate
eutrophic
Eutrophic
Hypertrophic
> 4.51
Table VI: Upper values / maximum permited values or concentrations / of Microbiological Pollution
Indicators :
Indicators:
F. Eutrofication Indicators :
1.Most probable number of termotolerant coliform bacteria No/100 ml
Upper values and concentrations per class
Class I
Class II
Class III
Class IV
Class V
5
5 – 50
50 – 500
> 500
> 500
Table VII: Upper values / maximum permited values or concentrations / of Radiological Indicators :
Indicators:
G. Radiological Indicators :
1. Level of radioactivity
Upper values and concentrations per class
Class I
Class II
Class III
Class IV
Class V
Total activity of heavy radioactive waste materials which can be
released into the surface water - water course during one year, shall
be calculated by a following formula:
F/O (  Ai/MDKi )
3
Given values on brackets refer only on lakes and reservoirs
Given values refer only on lakes and reservoirs
a/ Mean value of investigation in summer period
4
Page 3 of 9
Regulation for Classification of Water
The Official Gazette of the Republic of Macedonia No. 18-99
where:
Ai - total activity of i-th nucleid releised into water course during
one year in Bq.
MDKi – maximum allowed concentration of i-th radio nucleid in
drinking water for ion radiation Bq/m3
O – average yearly discharge of the river in m3/s
F – safety factor and reserve, a number depending on radioecological and hydrodynamical conditions of the river, of the river
water use, the number and position of the inflow of radfioation
within the catchment and other information, calculated in a way to
provide protection of ionic radiation.
Table VIII:Upper values / maximum permited values or concentrations / of Harmful and Dangerous
Matters :
HARMFUL AND DANGEROUS MATTER
- NAME I. Metals and its Compounds
01.
Aluminium
02.
Antimony
03.
Arsenic
04.
Copper
05.
Barium
06.
Beryllium
07.
Bismuth
08.
Zink
09.
Cadmium
10.
Cobalt
11.
Selenium - inorganic
12.
Chromium – total
Chromium – six-valent
13.
Manganese
14.
Molybdenum
15.
Nickel
16.
Lead
17.
Palladium
18.
Silver
19.
Thallium
20.
Titanium
21.
Vanadium
22.
Iron
23.
Mercury – total
Total organic-Mercury compounds.
II. Other Inorganic Parameters:
24.
Ammonia
Num
25.
Asbestos
26.
Boron
27.
Cyanides
28.
Fluoride
29.
Phosphorus - elementary
30.
Chlorine
31.
Nitrate
32.
Nitrite
33.
Selenium
34.
Sulfides –total
III. Phenols
35.
Phenol
Upper values and concentrations
Unit
Class I-II
Class III-IV
Class IV
g/l Al
g/l Sb
g/l As
g/l Cu
g/l Ba
g/l Be
g/l Bi
g/l Zn
g/l Cd
g/l Co
g/l Sn
g/l Cr
g/l Cr6+
g/l Mn
g/l Mo
g/l Ni
g/l Pb
g/l Pd
g/l Ag
g/l Ta
g/l Ti
g/l V
g/l Fe
g/l Hg
g/l Hg
1500
30
30
10
1000
0.2
50
100
0.1
100
100
50
10
50
500
50
10
2
2
3
100
100
300
0.2
0.02
1500
50
50
50
4000
1
50
200
10
2000
500
100
50
1000
500
100
30
20
20
30
100
200
1000
1
0.1
> 1500
> 50
> 50
> 50
> 4000
>1
> 50
> 200
> 10
> 2000
> 500
> 100
> 50
> 1000
> 500
> 100
> 30
> 20
> 20
> 30
> 100
> 200
> 1000
>1
>0.1
g/l NH3
g/l NH4
g/l
g/l B
g/l CNg/l Fg/l P
g/l Cl2
g/l N
g/l N
g/l Se
g/l S-2
20
1000
200
1
300
0.01
2
10000
10
10
2
g/l
1
Page 4 of 9
500
> 500
10000
>10000
May not be present
750
> 750
100
> 100
1500
> 1500
0.1
> 0.1
10
> 10
15000
> 15000
500
> 500
10
> 10
50
> 50
50
> 50
Regulation for Classification of Water
The Official Gazette of the Republic of Macedonia No. 18-99
36.
Cresol / o-, m-, p- /
37.
Nonylphenol
38.
2-chlorophenol
39.
2, 4-dichlorophenol
40.
2, 4, 5-trichlorophenol
41.
Pentachlorophenol
42.
o-nitrophenol
43.
m-nitrophenol
44.
p-nitrophenol
45.
2, 4-dinitrophenol
46.
Picric acid
47.
4, 6-dinitro-o-cresol
48.
Aminophenol / o-, m-, p- /
IV. Hydrocarbons:
49.
Oil
50.
Benzene
51.
Toluene
52.
Xylene / o-, m-, p- /
53.
Ethylbenzene
54.
Styrene
55.
Mesitylene
56.
Diisopropyl benzene
57.
Naphthalene , methyl naphthalene
58.
Fluorene
59.
Phenanthrene
60.
Anthracene
61.
Acenaphthene
62.
Fluoranthene
63.
Polynuclear aromatic hydrocarbons /higher
homologous/-cancerogenous
64.
Ethylene
65.
Propilene
66.
Isobutylene
67.
1-butene
68.
Isoprene
69.
Cyclohexane
70.
Cyclohexene
71.
Biphenyl propane
V. Halogenated Hydrocarbons :
72.
Methylchloride
73.
Methylbromide
74.
Dichloromethane
75.
Bromodichlormethane
76.
Bromoform
77.
Chloroform
78.
Tetrachlorcarbon
79.
1,2-dichloroethane
80.
1,1.2-trichloroethane
81.
1,1,1-trichloroethane
82.
1,1,2,2-tetrachloroethane
83.
Hexachloroethane
84.
Vinyl chloride
85.
Dichloroethylene
86.
Trichloroethylene
87.
Tetrachloroethylene
88.
Monochlorobenzene
89.
Dichlorobenzene
90.
Trichlorobenzene
5
Values given in brackets refer to water Class IV
Page 5 of 9
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
2
1
0.1
0.3
1
1
1
10
10
30
10
10
10
20
10
10
5
10
10
50
50
50
50
50
50
50
> 20
> 10
> 10
>5
> 10
> 10
> 50
> 50
> 50
> 50
> 50
> 50
> 50
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
10
1,5
50
50
50
20
5
50
1
5
5
5
5
5
50 / 100 / 5
10 / 50 /
100 / 500 /
100 / 500 /
100 / 500 /
100 / 500 /
100 / 500 /
100 / 500 /
10 / 100 /
50
50
50
50
50
> 100
> 50
> 500
> 500
> 500
> 500
> 500
> 500
> 100
> 50
> 50
> 50
> 50
> 50
g/l
0.01
0.04
> 0.04
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
50
50
50
20
5
20
20
10
100 / 500 /
100 / 500 /
100 / 500 /
100 / 500 /
100 / 500 /
100 / 500 /
100 / 500 /
100 / 500 /
> 500
> 500
> 500
> 500
> 500
> 500
> 500
> 500
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
2
2
2
2
2
2
2
7
3
25
2
6
5
1,5
20
2
20
2
10
20
20
20
20
20
20
20
100
50
100
15
10
50
25
75
4
100
20
20
> 20
> 20
> 20
> 20
> 20
> 20
> 20
> 100
> 50
> 100
> 15
> 10
> 50
> 25
> 75
>4
> 100
> 20
> 20
Regulation for Classification of Water
The Official Gazette of the Republic of Macedonia No. 18-99
Pentachlorobenzene
Hexachlorobenzene
Trichloronaphthalene
Tetrachloronaphthalene
Pentachloronaphthalene
Hexachloronaphthalene
Dekachloronaphthalene
Dichloropropane
Dichloropropene
1.3-dichlorobutane
Dichlorocyclohexane
Tetrachloropropane
Tetrachloropenthane
Tetrachloroheptanee
Tetrachlorononane
Tetrachlorodekane
Pentachloroheptane
Hexsachlorobutadiene
Heksachlorociklobutadiene
Heksachlorobutane
2, 3, 7, 8-tetrachlorodibenzo-pdioksin / TKDD /
VI. Nitrated Hydrocarbons :
112. Nitrobenzene
113. Dinitrobenzene
114. 2, 4-dinitrochlorobenzene
115. Nitrotoluen / o-, m-, p- /
116. Nitrochlorobenzene
117. Dinitrotoluene
118. 2, 4, 6-trinitrotoluene
119. Dinitronaphthalene
120. Nitromethane
121. Nitropropane
122. Nitroethane
123. Nitrobutane
124. Nitroform
125. Tetranitrometane
126. Nitrocyclohexsane
127. N-nitrosodimethylamine
128. N-nitrosodiethylamine
129. N-nitrosodibutilamine
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
0.5
1
4
1,5
0,4
0,15
0,1
50
1
20
20
10
5
3
3
7
20
1
1
10
5
1
4
1,5
0,4
0,15
0,1
200
20
50
50
50
50
30
30
50
100
10
10
100
>5
>1
>4
> 1,5
> 0,4
> 0,15
> 0,1
> 200
> 20
> 50
> 50
> 50
> 50
> 30
> 30
> 50
> 100
> 10
> 10
> 100
g/l
4,5 10-7
4,5 10-7
4,5 10-7
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
20
10
10
10
20
1
20
1
5
5
5
5
10
20
20
0.03
0.01
0.015
50
50
50
50
50
10
50
10
50
50
50
50
50
50
50
0.034
0.01
0.015
> 50
> 50
> 50
> 50
> 50
> 10
> 50
> 10
> 50
> 50
> 50
> 50
> 50
> 50
> 50
0.03
0.01
0.015
130.
131.
132.
g/l
g/l
g/l
0.1
2,0 10-3
2,0 10-2
0.1
1 10-2
2,0 10-2
0.1
1 10-2
2,0 10-2
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
0,003
0,003
0.001
0,004
0,01
0,03
0.001
0.005
0.001
0,01
0,2
0,003
0.001
0.04
0,1
0,3
0.01
0.05
0.001
0,1
> 0,2
0,003
0.001
> 0.04
> 0,1
> 0,3
0.01
0.05
0.001
0,1
g/l
g/l
g/l
g/l
0,01
0,1
0,1
0,04
0,1
1
1
0,4
0,1
1
1
0,4
91.
92.
93.
94.
95.
96.
97.
98.
99.
100.
101.
102.
103.
104.
105.
106.
107.
108.
109.
110.
111.
N-nitrosopirolidine
Benzidine
3,3-dihlorbenzidine
VII. Pesticides
133. Aldrin
134. Dieldrin and metabolites
135. DDT
136. Endrin
137. Lindane
138. Methoxychlor-DDT
139. Polihlorinated biphenyl PCBs
140. Toxsaphene / kamphechlor /
141. Heptachlor
142. Chlordane
143. Common kriterium for otherOrganic
chlornated pesticides
144. Karbophos / Malathion /
145. Merkaptophos / Demeton /
146. Tiophos / Parathion /
Page 6 of 9
Regulation for Classification of Water
The Official Gazette of the Republic of Macedonia No. 18-99
147.
VIII.
148.
149.
150.
151.
152.
153.
154.
155.
156.
157.
158.
159.
160.
161.
162.
163.
164.
165.
166.
167.
168.
169.
170.
171.
172.
173.
174.
175.
176.
177.
178.
179.
180.
181.
182.
183.
184.
185.
186.
187.
188.
189.
190.
191.
192.
193.
194.
195.
196.
197.
198.
199.
6
Common kriterium for otherOrganic Phosphorus and carbamic pesticides
Other Organic Compounds :
Acetone
Acetone cyanohydrin
Acrolein
Acrylonitril
Anion detergents
Kation detergents
Non-ionic detergents
Surface active materials
Amini / C7 – C9 /
Amini / C10 – C16 /
Amini / C17 – C20 /
Benzoic acid
Buten-1
Butanol
Butyl acrilat
Butyric acid / BOD5 /
Butyl xantate
n-Butylmercaptan
Hydrogen sulphide
Dimethyl sulphide
Diisopropyl amine
Cyclohexanol
Cyclohexanone
Cyclohexanonoksim
Diphenylhidrazine
Ethylacrilat
Ethylamine
Ehylenglicol
Formaldehyde
Phtalic ester
Heptanol
Isophorone
Isobutanol
Ethyl-merkuric chlorid
Kaprolactam
Potassiumdiethylditio-phosphate
Potassiumisopropyl-ditio-phosphate
Maleic anhydride
Mercaptoethyldiethyl-amin Methyldithiocarbamat Na-sol
Methanol
Methylacrilat
Methylbenzoat
Maslena acid
Milk acid
Mravja acid
Nonil alcohol
Oktil alcohol
Sintetic masni acid C5-C20
Tannin
Terpentin
Tetraethylselenium
Tetraethyllead
Tributilphosphate
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l

mg/l
g/l
g/l
g/l
mg/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
g/l
the value in the brackets refers to class II
Page 7 of 9
0,1
1
1
100
2000
2000
1
1
1
2
10
10
0,1
200
200
100
500
> 500
50
100
> 100
100
500
> 500
1000 /30006/
5000
> 5000
100
100
> 100
40
500
500
30
50
50
BOD5 not more than allowed concentration for certain water class
100
10000
10000
1000
5000
5000
15
1000
1000
5
10
10
1
6
3
3
3
3
300
300
500
50
500
500
500
500
20
20
20
1000
1000
1000
0,4
20
20
5
50
> 50
300
500
500
1000
1000
1000
300
500
500
3
30
30
5
5
5
6
60
60
1000
5000
5000
0,1
0,1
0,1
500
1000
1000
200
2000
2000
20
1000
1000
1000
1000
1000
100
1000
1000
20
500
500
100
500
500
20
200
200
1
100
100
500
1000
1000
500
2000
2000
1000
4000
> 4000
10
10
> 10
50
500
500
1000
5000
5000
500
10000
> 10000
200
5000
> 5000
0,2
20
20
0,1
0,1
10
100
100
Regulation for Classification of Water
The Official Gazette of the Republic of Macedonia No. 18-99
200.
201.
Carbondisulfide
Dimethylformamide
202.
Methyllethyl ceton
g/l

mg/l

mg/l
203.

Propilen glicol
mg/l
204.

Triethylen glicol
mg/l
3
3
>3
BOD5 not more than allowed concentration for certain water class
BOD5 not more than allowed concentration for certain water class
BOD5 not more than allowed concentration for certain water class
BOD5 not more than allowed concentration for certain water class
Article 5
The values of indicators from Article 4 of this Regulation shall be applied upon:
1.
2.
3.
4.
For water courses without regulated flow: for all discharges equal or larger than the
monthlly loe flow with 95 % probability;
For water courses with regulated flow: for all discharges larger than the guaranteed low
flow;
groundwateri: for all discharges and water levels;
lakes: for unfavourable cases of mixing of waters / during periods of ice and during critical
summer months /.
Article 6
As exemptions from Arcicle 4 of this Regulation, certai indicators shall not be used for
classification of:
1.
2.
3.
water courses -indicators under number 16 / level of biological productivity /;
groundwater flows in karst - indicators under number 16 / level of biological productivity /,
and for other types of groundwater indicators under number 6 / dissolves oxygen /, under
number 15 / level of saprobity/ and indicators under number 16 / level of biological
productivity /;
natural lakes - indicators under number 6 / dissolves oxygen /, under number 15 / level of
saprobity / and for second class of natural lakes the indicators under number 2 / visible
color /.
In the classification of carstic springs, if the turbidity ids from natural cause, the indicators from
Article 4 of theis Regulation under number 10 / suspended matter/ may be exceeded, but the
turbidity should not be present in more than 30 days in one year.
Article 7
In the calculation of the toxicity of larger number of dangerous and harmful matter the allowed
concentrations has to comply with the following formula:
Ca La  Cb Lb  .......  Cn Ln  1
Where: Ca, Cb, ….. Cn are the measured concentrations of harmful and dangerous substances in
the water, , La, Lb, ….. Ln are the maximum allowed concentrations / MAC / , for each of those
substances individually.
Article 8
Concentrations of harmful and dangerous substances are determined:
Page 8 of 9
Regulation for Classification of Water
The Official Gazette of the Republic of Macedonia No. 18-99


for concentrated use of water – at the boundary of the first zone of sanitary protection, or nat
the place of water intake;
for other concentrated use of water, in the zone of 95 % mixing.
Article 9
With the day of coming into force of this Regulation the use of "Regulation for the maximum
allowed concentrations of radio-nucleids and dangerous substances in the international water
courses, inter-republical waters and coast sea waters of Yugoslavia" / Official gazette of SFRJ
number 8/78 /.
Article 10
This Regulation shall come into force eight days from the day it it published in the "Official
Gazette of Republic of Macedonia".
Number 23-1665/1
23.03.1999
Skopje
PRESIDENT
OF THE GOVERNMENT OF
REPUBLIC OF MACEDONIA
Ljubcho Georgievski, s.r.
Page 9 of 9