THURSDAY, SEPTEMBER 12, 1991
20
GRADING OF BEACH WATER QUALITY
THE ENVIRONMENTAL PROTECTION DEPARTMENT (EPD) TODAY (THURSDAY) ANNOUNCED GRADES ON THE BACTERIOLOGICAL WATER QUALITY OF ALL BATHING BEACHES IN HONG KONG.
THE PURPOSE OF THE GRADING SYSTEM IS то INFORM SWIMMERS AND THE GENERAL PUBLIC ABOUT THE STATE OF BACTERIOLOGICAL POLLUTION AT VARIOUS BEACHES.
THE GRADING WILL BE SEASON, TO COINCIDE WITH THE USUALLY SAMPLED.
THE BATHING
ANNOUNCED BIWEEKLY DURING
FREQUENCY AT WHICH BEACH WATERS ARE
THE GRADING 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 BACTERIOLOGICAL 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 FORM THE BEST AVAILABLE FORECAST FOR THE IMMEDIATE FUTURE.
AN EPD SPOKESMAN SAID: "BEACHES WITH HIGHLY DEVELOPED HINTERLANDS ARE LIKELY TO BE MORE POLLUTED THAN THE GRADES SUGGEST DURING AND AFTER HEAVY RAIN.
"BATHERS SHOULD AVOID SUCH BEACHES FOR TWO OR THREE DAYS AFTER A STORM, LONGER IF THE WEATHER REMAINS OVERCAST OR LESS IF THERE IS STRONG SUNSHINE.
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THE SYSTEM FOR GRADING BEACH WATER QUALITY IS AS FOLLOWS:
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 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 19 NO MORE THAN OF MINOR ILLNESS PER 1,000 SWIMMERS.
10 CASES
/GRADE "3"