1. Chemical state in lakes and rivers
Jari Pasanen

2. Chemical state in classification
EU priority substances
National priority substances
Other substances
observed
concentration/EQS
observed
concentration/EQS
Included in ecological classification through their biological impacts
Ecological state maximum ’moderate’ if observed > EQS
Chemical state: ’good’ or ’not-good’
EQS: environmental quality standard

3. EU priority substances
European Union wide environmental quality standard values for 33 substances.
Nickel and its compounds
Nonylphenols
Octylphenols
Pentachlorobenzene
Pentachlorophenol
Polyaromatic hydrocarbons
Simazine
Tributyltin compounds
Trichlorobenzenes
Trichloromethane (chloroform)
Trifluralin
Alachlor
Anthracene
Atrazine
Benzene
Brominated diphenyletheriv
Cadmium and its compounds
Chloroalkanes. C10-13 iv
Chlorfenvinphos
Chlorpyrifos
1.2-Dichloroethane
Dichloromethane
Di(2-ethylhexyl)phthalate (DEHP)
Diuron
Endosulfan
Fluoranthenevi
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclohexane
Isoproturon
Lead and its compounds
Mercury and its compounds
Naphthalene

4. EU priority substances
Observed annual average concentration is compared with the environmental quality standard value.
For soluble metals local background concentration is taken into account.
If any substance exceeds the EQS concentration. the water is classified chemically ’not-good’.
EU priority substances
observed
concentration/EQS
Chemical state: ’good’ or ’not-good’

5. EU priority substances
Measured in concentrations (μg/l) in water sample.
Metals are measured in soluble concentrations.
Annual average results are used for AA-EQS
Three substances are measured in perch, wet weight (ww) mg/kg.
Mercury (Hb) EQS: (+ background)= 0,22-0,25 mg/kg
Earlier 1,0 mg/kg (pike) and 0,5 mg/kg for other fishes
Hexachlorobenzene EQS: mg/kg
Hexachlorobutadiene EQS: mg/kg
Also interesting
Nickel and its compounds 20 µg/l

6. Perch
Nordic map shows the site-specific arithmetic means of observed mercury concentrations (mg/kg ww), collected in
Nordic mean for perch is 0,4 mg/kg (ww)
Source: Mercury in Nordic ecosystems, 2007, Norden IVL report B1761

7. Mercury in perch in Finland
These results are used in the classification on the second round
Under EQS
Over EQS
Only exceeding in Lapland is artificial lake Porttipahta

8. National priority substances
National environmental quality standard values for 15 substances.
All expressed as concentrations in water sample (μg/l).
Separate standard value for surface waters and water in domestic use.
Chlorobenzene
1.2-dichlorobenzene
1.4-dichlorobenzene
Benzyl butyl phthalate (BBP) 2
Dibutyl phthalate (DBP)
Resorcinol (1.3-benzenediol)
(benzothiazol-2-ylthio) methylithio cyanate
Benzothiazole-2-thiol
Bronopol (2-bromo-2-nitropropane-1.3-diol)
Dimethoate
MCPA (4-chloro-2-methylphenoxy acetic acid)
Metamitron
Prochloraz
Ethylene thiourea
Tribenuron-methyl

9. National limit values
Observed annual average concentration is compared with the environmental quality standard value.
If any substance exceeds the EQS concentration
-> ecological state is at most ’moderate’
National priority substances
observed
concentration/EQS
if observed > EQS,
ecological state maximum ’moderate’
high
good
moderate
poor
bad

10. Loading inventory of priority and harmful substances
Work is coordinated by Finnish Environment Institute
-> report concerning priority substances load and emissions in water district areas
Regional authorities give feedback from their point of view (local participation)
Installations (Ni, Hg, Cd, Pb, cooling waters)
Mines (Ni)
Municipal waste water treatment plants (no priority substance emissions)
Municipal waste landfills (no priority substance emissions)
Air deposit (Hg)

11. Point source emissionin Lapland for the inventory