1990 - 2099 Centre for Environment, Fisheries & Aquaculture Science (Cefas) England and Wales - Shellfish Classification Zones of England and Wales

Map of Bivalve mollusc (shellfish) classification zones. Available on Magic, Spire and Cefas website. Bivalve mollusc (shellfish) harvesting areas are classified according to the extent of contamination shown by monitoring of *E. coli* in shellfish flesh. Treatment processes are stipulated according to the classification status of the area. The classification categories are: **Class A** (80% of samples must be ≤ 230 *E. coli* /100g; all samples must be less than 700 E. coli/100g) - molluscs can be harvested for direct human consumption **Class B** (90% of samples must be ≤ 4600 *E. coli* /100g; all samples must be less than 46000 E. coli/100g) - molluscs can be sold for human consumption: - after purification in an approved plant, or - after re-laying in an approved Class A re-laying area, or - after an EC-approved heat treatment process. **Class C** (≤ 46000 *E. coli* /100g) - molluscs can be sold for human consumption only after re-laying for at least two months in an approved re-laying area followed, where necessary, by treatment in a purification centre, or after an EC-approved heat treatment process. In all cases, the health standards in Annex III of EC Regulations 853/2004 and the microbiological criteria adopted under EC Regulation 2073/2005 must be met. Molluscs must not be subject to production or collected in prohibited areas. There are two classification systems in England and Wales: ( 1.)the annual or "temporary" classification system ( 2.)the long-term classification (LTC) system. New areas are initially given annual/temporary classifications until they meet the criteria for an LTC. Harvesting sites that do not meet LTC criteria are automatically classified under the annual/temporary classification system. Classification: Class A=1, Class B=2, Class C=3, Prohibited=4, Long Term Class B=5, Seasonal Class B/Class C=6, Seasonal ClassA/Class B=7双壳类软体动物（Bivalve mollusc，即贝类shellfish）分类区地图。该数据集可于Magic、Spire及Cefas官方网站获取。 双壳类软体动物（贝类）捕捞区依据贝类肌肉中大肠杆菌（*E. coli*）的监测污染程度进行分级，针对不同分级的区域，需执行相应的处理流程。 分级标准如下： **A级**：80%的样品≤230*E. coli*/100g；所有样品均需＜700*E. coli*/100g——软体动物可直接捕捞供人类食用。 **B级**：90%的样品≤4600*E. coli*/100g；所有样品均需＜46000*E. coli*/100g——软体动物可售卖供人类食用，但需满足以下任一处理要求： - 在获批净化厂完成净化处理，或 - 在获批A级暂养区进行暂养，或 - 经欧盟（EC）批准的热处理工艺处理。 **C级**：≤46000*E. coli*/100g——软体动物仅可在获批暂养区暂养至少两个月后，必要时再经净化中心处理，或经EC批准的热处理工艺处理后，方可售卖供人类食用。 无论采取何种处理方式，均需符合欧盟（EC）法规第853/2004号附件三中的健康标准，以及欧盟（EC）法规第2073/2005号所采用的微生物学准则。软体动物不得在禁捕区域进行生产或捕捞。 英格兰与威尔士地区采用两套分级体系： 1. 年度/"临时"分级体系 2. 长期分级（Long-term Classification, LTC）体系。 新区域在符合长期分级体系标准前，将先赋予年度/临时分级。未达到长期分级标准的捕捞站点，将自动归入年度/临时分级体系进行管理。 分级编码对应关系如下：A级=1，B级=2，C级=3，禁捕区=4，长期B级=5，季节性B级/C级=6，季节性A级/B级=7