who飲用水指南（第四版）與生活用水衛(wèi)生標(biāo)準(zhǔn)gb5749-20xx的限度值比較20xx01-文庫吧
2024-10-28 15:05 本頁面
【正文】 levels causing acceptability problems in drinkingwater 銅（ mg/L） 2 鋅（ mg/L） Not of health concern at levels found in drinkingwater 氯化物（ mg/L） 250 Not of health concern at levels found in drinkingwater 硫酸鹽（ mg/L） 250 Not of health concern at levels found in drinkingwater 溶解性總固體（ mg/L） 1000 The palatability of water with a total dissolved solids (TDS) level of less than about 600 mg/l is generally considered to be good。 drinkingwater bees significantly and increasingly 3 unpalatable at TDS levels greater than about 1000 mg/l. No healthbased guideline value for TDS has been proposed 總硬度 (以 CaCO3 計， mg/L） 450 Not of health concern at levels found in drinkingwater. May affect acceptability of drinkingwater 耗氧量（ CODMn法，以 O2計， mg/L） 3 水源限制，原水耗氧量＞6mg/L 時為 5 Dissolved oxygen. No healthbased guideline value is remended 揮發(fā)酚類（以苯酚計， mg/L） No value 陰離子合成洗滌劑（ mg/L） In many countries, persistent types of anionic detergent have been replaced by others that are more easily biodegraded, and hence the levels found in water sources have decreased substantially. The concentration of detergents in drinkingwater should not be allowed to reach levels giving rise to either foaming or taste problems. The presence of any detergent may indicate contamination of source water with sewage or ingress of detergent solution into the distribution system, as a result of backflow, for example. 放射性指標(biāo) ② 指導(dǎo)值 總α放射性（ Bq/L） 總β放射性（ Bq/L） 1 1 ① MPN 表示最可能數(shù)； CFU 表示菌落形成單位。當(dāng)水樣檢出總大腸菌群時，應(yīng)進(jìn)一步檢驗大腸埃希氏菌或耐熱大腸菌群；水樣未檢出總大腸菌群，不必檢驗大腸埃希氏菌或耐熱大腸菌群。 ② 放射性指標(biāo)超過指導(dǎo)值，應(yīng)進(jìn)行核素分析和評價，判定能否飲用。 表 2 飲用水中消毒劑常規(guī) 指標(biāo)及 要求 消毒劑名稱 與水接觸時間 出廠水 中限值 出廠水 中余量 管網(wǎng)末梢水中余 量 中國標(biāo)準(zhǔn) WHO value 氯氣及游 離氯制劑（游離氯 ,mg/L） 至少 30min 4 5 ≥ ≥ 一氯 胺（總氯 ，mg/L） 至少 120min 3 3 ≥ ≥ 臭氧（ O3， mg/L） 至少 12min No value 如加氯， 4 總氯≥ 二氧化氯（ ClO2，mg/L） 至少 30min A guideline value has not been established for chlorine dioxide because of its rapid hydrolysis to chlorite and because the provisional guideline value for chlorite is adequately protective for potential toxicity from chlorine dioxide. The taste and odour threshold for this pound is mg/l. ≥ ≥ 表 3 水質(zhì)非常規(guī)指標(biāo)及限值
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