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Outline
Secondary water supply is an important part of municipal pipe networks, directly impacting drinking water quality for thousands of households. To meet the requirements of the new situation and strengthen the sanitary management of secondary water supply facilities, the Beijing Center for Disease Prevention and Control led the revision of the Hygienic Specification for Facilities of Secondary Water Supply (GB 17051—1997) from 2020 to 2025. The revised standard, Hygienic Specification for Facilities of Secondary Water Supply (GB 17051—2025), was issued on May 30, 2025, and will be implemented on June 1, 2026. This article interprets the background, drafting principles, main concepts, and main contents of the revision, thus improving the understanding about the contents of the standard and guide the application of the standard.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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