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

g/l

300 T90(e)

(f)

Phenols

gC6H5OH

5 T90(e)

50 T95(e)

Surfactants(g)

g/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