WATER quality declined at some beaches over the past fortnight as heavy rains continued to flush pollutants into the sea, the Environmental Protection Department said yesterday. The wet weather has contributed to a general drop in water quality at 23 of the 45 graded beaches since monitoring began in April. Hong Kong South: Big Wave Bay - fair, Chung Hom Kok - fair, Deep Water Bay - fair, Hairpin - fair, Middle Bay - fair, Repulse Bay - good, Shek O - poor, South Bay - good, St Stephen's - good, Turtle Cove - fair, Stanley Main - poor, Rocky Bay closed, To Tei Wan* - good. Tuen Mun District: Old Cafeteria closed, New Cafeteria - poor, Castle Peak closed, Kadoorie - poor, Butterfly - very poor. Sai Kung District: Campers - good, Clear Water Bay 1st Beach - poor, Clear Water Bay 2nd Beach - fair, Hap Mun Bay - good, Kiu Tsui - good, Pak Sha Chau - good, Silverstrand - poor, Trio (Hebe Haven) - fair. Islands District: Cheung Sha Upper - good, Cheung Sha Lower - fair, Discovery Bay* - fair, Hung Shing Yeh - fair, Kwun Yam Wan - fair, Tong Fuk - fair, Lo So Shing - good, Pui O - fair, Silvermine Bay - poor, Tung Wan, Cheung Chau - fair, Tung O* - good. Tsuen Wan District: Anglers closed, Approach - very poor, Casam - poor, Gemini - very poor, Hoi Mei Wan - very poor, Lido - poor, Ting Kau - very poor, Tung Wan, Ma Wan - fair. Note: * Non-gazetted beach.