Recommended and limit pollutant concentration values in ambient air

Recommended and limit levels (ug/m3) for sulphur dioxide (SO2), black smoke and total suspended particulates (TSP) with respect to the concentration levels and the measuring method for TSP
Monitoring
period
Parameter
Sulphur dioxide
Black
smoke
Total suspended particulates
Sampling
period
RV
1 year
Cavg
50
50
75
24 hours
RV
1 year
Cmax
125
125
120
24 hours
LV
1 year
C50
80
40-80
150
24 hours
LV
1 year
C50
120
<40
<150
24 hours
LV
1 year
C98
250 +
150-250
350
24 hours
LV
1 year
C98
350 +
<150
<350
24 hours
LV
Heating season*
C50
130
60-130
200
24 hours
LV
Heating season*
C50
180
<60
<200
24 hours

RV - Recommended value
LV - Limit value
+ - This value should not be overpassed, but if it occures it should last no longer than three successive days.
* - Heating season: 1 October - 31 March.

Recommended and limit concentration values (ug/m3) for gaseous pollutants in ambient air
Monitoring period
Pollutant
RV
LV
Sampling period
Cavg
C98
Cavg
C98
1 year
Nitrogen
dioxide
30
60+
50
120
24 hours
1 year
Nitrogen
dioxide
200
1 hour
1 year
Carbon monoxide
1000
5000
2000
8000
24 hours
1 year
Carbon monoxide
15000
1 hour
1 year
Ozone
50
110
80
150
24 hours
1 year
Ozone
180
1 hour
1 year
Ammonia
30
100
70
250
24 hours
1 year
Ammonia
1000
1 hour
1 year
Hydrogen sulphide
2
5
24 hours
1 year
Hydrogen sulphide
10
1 hour
1 year
Mercaptanes
1
3
24 hours
1 year
5
1 hour
1 year
Formaldehyde *
30
70
24 hours
1 year
Formaldehyde *
100
1 hour
1 year
Phenols
50
100
200
1 year
Phenols
200
1 hour
1 year
Hydrogen chloride
100
200
24 hours
1 year
Hydrogen chloride
300
1 hour
1 year
Fluorides (gaseous)
1
3
24 hours
1 year
Fluorides (gaseous)
5
1 hour

+ - Cmax once a year over 80
* - Only indoors
Recommended and limit concentration values (ug/m3) for total suspended particulates (TSP) and metal content in particles
<
Monitoring period
Pollutant
RV
LV
Sampling period
Cavg
C98
Cavg
C98
1 year
Total suspended particulates
75
120+
150
350
24 hours
1 year
Lead
1
2
24 hours
1 year
Cadmium
0.01
0.04
1 year
Manganese
1
2
24 hours
1 year
Sulphates
50
100
24 hours
1 year
Sodium fluoride
100
200
24 hours
1 year
Mercury *
0.01
1+
24 hours

* - Mercury vapours and anorganic mercury
+ - Only indoors
Please direct your questions and suggestions to
ksega@imi.hr