9
THURSDAY, MARCH 29, 1990
THE NEW FORTNIGHTLY GRADING SYSTEM IS SHOWN
IN THE
FOLLOWING
TABLE:
NEW FORTNIGHTLY GRADING SYSTEM
E.COLI COUNT
GRADE
PER 100
MILLILITRE
OF WATER
EXPECTED HEALTH RISK:
REMARKS
CASES OF MINOR ILLNESS ¦ (WATER PER 1,000 SWIMMERS
QUALITY)
NOT MORE THAN 24
UNDETECTABLE
GOOD
N
NOT MORE THAN 180
NOT MORE THAN 10
FAIR
3
1
NOT MORE THAN 610
NOT MORE THAN 15
ACCEPTABLE
4
MORE THAN 610
MORE THAN 15
POOR
OF THE THIS IS IN LINE WITH THE RECOMMENDATION ORGANISATION (WHO) THAT LOCAL GUIDELINES SHOULD BE USED THE GENERALISED WHO GUIDELINES.
NEW
GRADING FORTNIGHTLY
SYSTEM OF
THE RANKING CRITERIA FOR THE ARE BASED ON LOCAL DATA ON HEALTH EFFECTS OF BEACH WATER POLLUTION HONG KONG AND THUS WILL SUIT THE LOCAL CONDITIONS.
WORLD HEALTH IN PLACE ON
NEW
FORTNIGHTLY GRADING SYSTEM
GRADED A
THE RANKING CRITERIA FOR THE
ARE SOMEWHAT MORE STRINGENT THAN IN THE PAST.
THE EFFECT OF THIS WILL BE THAT SOME BEACHES PREVIOUSLY "A" WOULD NO LONGER BE PLACED IN THE TOP RANKING BUT WILL NOW HAVE RANKING OF "2".
MEAN
WILL NOT NECESSARILY HOWEVER, SUCH A CHANGE IN RANKING
ONLY THAT THE THAT THERE HAS BEEN A DETERIORATION IN WATER QUALITY, EXISTING WATER QUALITY HAS A NEW RANKING UNDER THE NEW SYSTEM.
GRADINGS
ANOTHER POSSIBLE EFFECT IS THAT THE QUALITY MAY FLUCTUATE MORE FREQUENTLY BECAUSE OF THE OF E. COLI COUNTS BEING USED.
OF BEACH WATER NARROWER RANGES
FOR THE HEALTH PUBLIC AND MORE PRECISE INFORMATION DECISIONS AS TO WHETHER TO SWIM OR NOT.
WITH THE NEW THAT THE
OF
ON
MR HOLMES SAID THE PUBLIC MIGHT NOT BE FAMILIAR SYSTEM AT FIRST BUT ITS INTRODUCTION IS JUSTIFIED ON THE GROUNDS
BETTER SAFEGUARD IT WOULD PROVIDE BOTH A
GENERAL SWIMMERS AND THE WHICH THE PUBLIC MAY BASE
/AS IN
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