XN000022-1990-04-19 — Page 21

THURSDAY, APRIL 19, 1990

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GRADING OF BEACH WATER QUALITY

* * * * * *

THE ENVIRONMENTAL PROTECTION DEPARTMENT (EPD) TODAY (THURSDAY) ANNOUNCED GRADES ON THE BACTERIAL WATER QUALITY OF ALL BATHING BEACHES IN HONG KONG.

THE PURPOSE OF THE GRADING SYSTEM IS ΤΟ INFORM SWIMMERS AND THE GENERAL PUBLIC ABOUT THE STATE OF BACTERIAL POLLUTION AT VARIOUS BEACHES.

THE GRADING WILL BE ANNOUNCED AT BIWEEKLY INTERVALS DURING THE BATHING SEASON, TO COINCIDE WITH THE FREQUENCY AT WHICH BEACH WATERS ARE USUALLY SAMPLED.

IT IS BASED ON THE MOST RECENT E. COLI DATA OBTAINED BY THE EPD IN ITS ROUTINE MONITORING PROGRAMME.

AS WITH LAST YEAR, THE GRADING ALSO INCLUDES AN ESTIMATE OF THE RISK OF SUFFERING SOME MINOR SKIN OR GASTROINTESTINAL COMPLAINTS AS A RESULT OF SWIMMING AT A BEACH WHICH HAS SOME DEGREE OF POLLUTION.

THE ESTIMATE IS BASED ON A VERY LARGE BODY OF STATISTICAL INFORMATION GATHERED IN HONG KONG IN RECENT BATHING SEASONS.

THE GRADING OF SOME BEACHES MAY VARY DURING THE SUMMER. THIS REPRESENTS A NATURAL FLUCTUATION IN THE BACTERIAL QUALITY OF BATHING WATERS IN MOST CASES, AS RAIN AND TIDES BRING MORE OR LESS POLLUTION TO THE BEACHES.

HOWEVER, THE GRADES GIVE A GOOD GENERAL PICTURE OF THE WATER QUALITY AT BATHING BEACHES AT THE TIME OF REPORTING AND THE BEST AVAILABLE FORECAST FOR THE IMMEDIATE FUTURE.

THE SYSTEM FOR GRADING BEACH WATER QUALITY IS AS FOLLOWS:

FORM

GRADE "1" INDICATES THAT THE WATER QUALITY IS GOOD. THE E. COLI COUNT IS NO MORE THAN 24 PER 100 MILLILITRES AT EACH BEACH SO GRADED, AND THE EXPECTED RISK OF MINOR ILLNESS TO SWIMMERS IS UNDETECTABLE.

GRADE "2" INDICATES THAT THE WATER QUALITY IS FAIR. THE E. COLI COUNT IS NO MORE THAN 180 PER 100 MILLILITRES AT EACH BEACH SO GRADED, AND THE EXPECTED HEALTH RISK IS NO MORE THAN 10 CASES OF MINOR ILLNESS PER 1,000 SWIMMERS.

GRADE "3" INDICATES THAT THE WATER QUALITY IS ACCEPTABLE. E.COLI COUNT IS NO MORE THAN 610 PER 100 MILLILITRES AT BEACH SO GRADED, AND THE EXPECTED HEALTH RISK IS NO MORE 15 CASES OF MINOR ILLNESS PER 1,000 SWIMMERS.

THE EACH

THAN

GRADE "4" INDICATES THAT THE WATER QUALITY IS POOR. THE E. COLI COUNT IS MORE THAN 610 PER 100 MILLILITRES AT EACH BEACH SO GRADED, AND THE EXPECTED HEALTH RISK IS MORE THAN 15 CASES MINOR ILLNESS PER 1,000 SWIMMERS.

OF

/THE DECISION