Quality standards for fresh and saline waters stipulated
in the Bathing Waters Directive
|
Parameter
|
Unit
|
G
|
I
|
| A.
INORGANIC SUBSTANCES AND GENERAL PHYSICO-CHEMICAL
PARAMETERS |
| Colour |
|
|
(a, b)
|
| Copper |
mgCu/l
|
|
|
| Dissolved
oxygen |
% saturation
|
80-120 T90
|
|
| pH |
|
|
6-9 T95(b)
|
| Turbidity |
Secchi depth m
|
>2 T90
|
>1 T95(b)
|
| B.
ORGANIC SUBSTANCES |
| Floating
waste(c) |
|
(d)
|
|
| Hydrocarbons |
µg/l
|
300 T90(e)
|
(f)
|
| Phenols |
µgC6H5OH
|
5 T90(e)
|
50 T95(e)
|
| Surfactants(g) |
µg/l as lauryl sulphate
|
300 T90(e)
|
(k)
|
| Tarry
residues |
|
(d)
|
|
| C.
MICROBIOLOGICAL PARAMETERS |
| Faecal
coliforms |
per 100 ml
|
100 T80
|
2 000 T95
|
| Total
coliforms |
per 100 ml
|
500 T80
|
10 000 T95
|
| Faecal
streptococi |
per 100 ml
|
100 T90
|
|
| Salmonella |
per 1 l
|
|
0 T95
|
| Entero
viruses |
PFU/10 l
|
|
0 T95
|
Notes
G guide value
I imperative (mandatory) value
T total concentration (ie without filtration)80
standard defined as 80-percentile*
90 standard defined as 90-percentile*
95 standard defined as 95-percentile*
It is further stipulated that of the 20, 10 or
5% of samples from designated waters which exceed
the standard, none should do so by more than 50%
(except for microbiological parameters, pH and dissolved
oxygen) and that "consecutive water samples
taken at statistically suitable intervals do not
deviate from the relevant parametric values"
(Article 5 of CEC 1976a).
No abnormal change in colour
May be waived in the event of exceptional weather
or geographical conditions
Defined as wood, plastic articles, bottles, containers
of glass, plastic, rubber or any other substance
Should be absent.
Applies to non-routine sampling prompted by visual
or olfactory evidence of the presence of he substance
There should be no film visible on the surface
and no odour
Reacting with methylene blue
There should be no lasting foam
References
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