Units of Measurement
uom
Units of area
area
Public draft
roug
2014-01-20 21:09:13.0
Common
false
false
km2
Square kilometer
valid
2013-08-01
2013-08-01
m2
Square meter
valid
2013-08-01
2013-08-01
Concentration units
concentration
Public draft
targajau
2022-03-25 16:00:46.0
Common
false
false
Bq
becquerel
One becquerel is defined as the activity of a quantity of radioactive material in which one nucleus decays per second
valid
2021-10-19
fg/m3
Femtograms per cubic metre of ambient air
Femtograms per cubic metre of ambient air. Unif of amount of chemical vapors, fumes, or dust in the ambient air.
valid
2019-09-19
m-1
Per meter
Per meter
valid
2014-11-06
2014-11-06
mg/l
Micrograms per litre.
Micrograms per litre.
valid
2014-11-06
2014-11-06
mg/m3
Miligrams per cubic metre of ambient air
Miligrams per cubic metre of ambient air. Unit of amount of chemical vapors, fumes, or dust in the ambient air.
valid
2013-08-01
2013-08-01
mg/m-3.day
Micrograms per cubic meter times day
Micrograms per cubic meter times day
valid
2014-11-06
2014-11-06
mg/m3.h
Micrograms per cubic meter times hour
Micrograms per cubic meter times hour
valid
2014-11-06
2014-11-06
mg N/l
Milligrams nitrogen per litre
Milligrams nitrogen per litre
valid
2014-11-06
2014-11-06
mg N/m2/m
Milligrams nitrogen per square meter per month
Milligrams nitrogen per square meter per month
valid
2014-11-06
2014-11-06
mg S/l
Milligrams sulphur per litre
Milligrams sulphur per litre
valid
2014-11-06
2014-11-06
mgS.m-1
Milligrams nitrogen per meter
valid
2018-09-26
mg S/m2.m
Milligrams sulphur per square meter per month
Milligrams sulphur per square meter per month
valid
2014-11-06
2014-11-06
mm
Millimeter
Millimeter
valid
2014-11-06
2014-11-06
ng/l
Nanograms per litre
Nanograms per litre
valid
2014-11-06
2014-11-06
ng/m2
Nanograms per square meter
Nanograms per square meter
valid
2014-11-06
2014-11-06
ng/m2/day
Nanograms per square metre per day
Unit of amount of chemical vapors, fumes, or dust deposited from the air.
valid
2013-08-01
2013-08-01
ng/m3
Nanograms per cubic metre of ambient air
Nanograms per cubic metre of ambient air. Unit of amount of chemical vapors, fumes, or dust in the ambient air
valid
2013-08-01
2013-08-01
pH units
pH
pH
valid
2014-11-06
2014-11-06
particles.cm-3
particles.cm-3
Number of particles per cm3
valid
2021-06-15
pg/m2/day
Picograms per square metre per day
Unit of amount of chemical vapors, fumes, or dust deposited from the air.
valid
2019-09-19
pg/m3
Picograms per cubic metre of ambient air
Picograms per cubic metre of ambient air. Unif of amount of chemical vapors, fumes, or dust in the ambient air.
valid
2013-08-01
2013-08-01
ppbv
Parts per billion per volume
Parts per billion per volume
valid
2014-11-06
2014-11-06
ppmv
Parts per million by volume
Parts per million by volume
valid
2014-11-06
2014-11-06
pptv
Parts per trillion per volume
Parts per trillion per volume
valid
2014-11-06
2014-11-06
uS/cm
Micro Siemens per centimeter
Micro Siemens per centimeter
valid
2014-11-06
2014-11-06
ue H/l
micromoles per litre
micromoles per litre
valid
2014-11-06
2014-11-06
µg/l
Micrograms per litre
Micrograms per litre
valid
2014-11-06
2014-11-06
ug/m2/day
Micrograms per square metre per day
Unit of amount of chemical vapors, fumes, or dust deposited from the air.
valid
2013-08-01
2013-08-01
µg/m3
Micrograms per cubic meter
Micrograms per cubic meter
valid
2013-08-01
2013-08-01
ug/m3·day
Micrograms per cubic metre per day
Micrograms per cubic metre per hour. Unit for Ozone SOMO35
valid
2014-06-03
2014-06-03
ug/m3·h
Micrograms per cubic metre per hour
Micrograms per cubic metre per hour. Unit for the calculation of the accumulated amount of ozone over the threshold value of 40 ppb (AOT40)
valid
2014-05-19
2014-05-19
µg C/m3
Micrograms of carbon per cubic metre
Micrograms of carbon per cubic metre
valid
2014-11-06
2014-11-06
µg N/m3
Micrograms of nitrogen per cubic metre
Micrograms of nitrogen per cubic metre
valid
2014-11-06
2014-11-06
ugNO2/m3
Units of mass concentration of nitrogen dioxide (μg/m3)
‘Oxides of nitrogen’ shall mean the sum of the volume mixing ratio (ppbv) of nitrogen monoxide (nitric oxide) and
nitrogen dioxide expressed in units of mass concentration of nitrogen dioxide (μg/m3).
valid
2014-09-08
2014-09-08
µg S/m3
Micrograms of sulphur per cubic metre
Micrograms of sulphur per cubic metre
valid
2014-11-06
2014-11-06
µg SO2/m3
Micrograms of sulphur dioxide per cubic metre
Micrograms of sulphur dioxide per cubic metre
valid
2014-11-06
2014-11-06
nm
Nanometer
Nanometer
valid
2022-03-25
2022-03-25
Emission units
emission
Public draft
targajau
2019-12-17 14:28:10.0
Common
false
false
kt/year
kilotonne per year
mass over time
valid
2013-08-01
2013-08-01
t/km/year
Tonne per kilometer per year
mass over area over time
valid
2013-08-01
2013-08-01
t/km2/year
Tonne per square kilometer per year
mass over area over time
valid
2013-08-01
2013-08-01
t/year
Tonne per year
mass over time
valid
2013-08-01
2013-08-01
Unknown
Unknown
Unknown
valid
2019-12-17
Units of length
length
Public draft
roug
2014-01-20 21:07:47.0
Common
false
false
km
kilometer
valid
2013-08-01
2013-08-01
m
meter
valid
2013-08-01
2013-08-01
General statistics
statistics
Public draft
roug
2014-01-20 21:21:17.0
Common
false
false
count
Count
valid
2013-09-13
2013-09-13
%
Percentage
valid
2013-08-01
2013-08-01
Time units
time
Public draft
roug
2014-01-07 08:19:59.0
Common
false
false
Continuous
Continuous
valid
2013-08-01
2013-08-01
d
Day
1 day = 24 hours
valid
2013-08-01
2013-08-01
h
Hour
1 hour = 60 minutes
valid
2013-08-01
2013-08-01
m
Minute
1 minute = 60 seconds
valid
2013-08-01
2013-08-01
month
Month
1 month = 28-31 days
valid
2013-08-01
2013-08-01
other
Other
valid
2013-08-01
2013-08-01
random
Random
Sampling without a specific pattern.
valid
2013-08-01
2013-08-01
s
Second
International System Base Unit
valid
2013-08-01
2013-08-01
variable
Variable
valid
2013-08-01
2013-08-01
wk
Week
1 week = 7 days
valid
2013-08-01
2013-08-01
y or a
Year
1 year = 12 months
valid
2013-08-01
2013-08-01
Velocity
velocity
Public draft
targajau
2015-06-10 08:35:44.0
Common
false
false
km/h
kilometer per hour
valid
2013-08-01
2013-08-01
m/s
meter per second
meter per second
valid
2015-06-10
Volume
volume
Released
roug
2014-01-20 21:46:08.0
Common
false
false
m3
Cubic metre
valid
2013-10-26
2013-10-26
Cubic meter