SUMMARY
Under
reduce
List
the EEC Dangerous
pollution
II
of both
substances,
have contracted
II
produced
in fulfilment
with
EQS values
report
is presented
and salt
which
are presented
Objectives
Quality
Standards
to
of
DOE
(EQO) approach.
is one of a series
and the chemistry
on UK and European
all
the protection
waters
for
from the discharge
on the concentration
are recommended for
EQSs for
as separate
salt-water
waters
the agreed
of fish
have been proposed
(EQSS) for
of fourteen
of iron
in water
of iron
in the
and biota.
uses of water
and other
on the basis
Suitable
Annexes.
aquatic
(as discussed
organisms
of literature
information
in both
reviews,
is
limited,
species.
The recommended EQS values
and for
Quality
are discussed
emphasis
fresh
Table
resulting
waters,
are required
of the contract.
Information
especially
This
substances.
Common uses of iron
in TK 206),
and salt
WRC to recommend Environmental
List
environment,
fresh
Member States
Directive,
by the Environmental
selected
reviewed.
Substances
comparison
for
water
uses are summarised
all
quality
standards
in an annotated
from other
countries
are also
tabulated.
Iron
may affect
fauna
and flora
of particulate
iron
In this
report
EQSs are proposed
arising
from excessive
velocities
guidance
in relation
and runoff
these
discharges;
those
areas
natural
substrates
and it
to the control
spoil.
extension
where responsibility
ecological
of direct
has only
Problems
effects.
on the dilution
been possible
niches.
and current
to give
limited
of discharges.
the commonest source
however,
when sedimentation
eliminating
are dependent
water
from colliery
or indirectly
on observations
sedimentation
of the receiving
In freshwaters
waters
may cover
directly
for
of iron-rich
discharges
The EQSs proposed
of existing
discharge
controls
is old mine
are applicable
will
can be clearly
be limited
identified.
to
to