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GB 5749-2022 "Sanitary Standard for Drinking Water" implemented on April 1
Time：
2023-04-01
The State Administration of Market Supervision and Administration and the National Standardization Administration approved the release of GB 5749-2022 "Sanitary Standards for Drinking Water" on March 15, 2022, which will be implemented on April 1, 2023.
The State Administration of Market Supervision and Administration and the National Standardization Administration approved the release of GB 5749-2022 "Sanitary Standards for Drinking Water" on March 15, 2022, which will be implemented on April 1, 2023.
The original standard GB5749-2006 "Sanitary Standard for Drinking Water" has been implemented for nearly 15 years since July 1, 2007. The new sanitary standard for drinking water has been issued, and the original standard has been revised. This time, the scope of the standard has been revised, normative references have been updated, terms and definitions such as centralized water supply, small-scale centralized water supply, secondary water supply, factory water, and peripheral water indicators have been improved or added or deleted, as well as editorial changes have been made to the text of some clauses.
Water quality indicators
01. Total Index Adjustment
The water quality indicators have been adjusted from 106 items in GB5749-2006 to 97 items. Including: 43 regular indicators and 54 expanded indicators. Add 4 indicators and delete 13 indicators.
02. Four new indicators
|
Index |
Limits |
|
Perchloric acid/（mg/L） |
0.07 |
|
Acetochlor/（mg/L） |
0.02 |
|
2-Methylisocamphenol/（mg/L） |
0.00001 |
|
Geosmin/（mg/L） |
0.00001 |
03. Delete 13 indicators
The 13 indicators deleted include heat-resistant coliform bacteria, trichloroacetaldehyde, sulfide, cyanogen chloride (calculated by CN -), hexachlorocyclohexane (total), parathion, methyl parathion, lindane, DDT, formaldehyde, 1,1,1-trichloroethane, 1,2-dichlorobenzene, and ethylbenzene.
04. Index name change
| GB5749-2006 | GB5749-2022 |
| Oxygen consumption (CODMn method, calculated as O2) | Permanganate index (calculated as O2) |
| Ammonia nitrogen (calculated by N) | Ammonia (calculated by N) |
| 1,2-dichloroethylene | 1,2-dichloroethylene (total) |
05. Index limit change
|
No. |
Indicator Name |
GB5749-2006 |
GB5749-2022 |
|
1 |
Nitrate (calculated as N)/(mg/L) |
20 when groundwater source is limited |
When small-scale centralized water supply and decentralized water supply are limited by water source and water purification technology, nitrate (calculated as N) shall be 20 mg/L |
|
2 |
Turbidity (NTU) |
3 when water source and purification conditions are limited |
When limited by small centralized water supply and decentralized water supply sources and water purification technology, it shall be implemented as per 3 |
|
3 |
Permanganate index (calculated as O2) (mg/L) |
Water source limitation: 5mg/L for raw water consumption>6mg/L |
3mg/L |
|
4 |
Free chlorine (mg/L) |
(1) Contact time with water: ≥ 30min; (2) Factory water limit: 4mg/L (3) Factory water margin: ≥ 0.3mg/L; (4) Water margin at the end of pipe network |
(1) Contact time with water: ≥ 30min; (2) Limit value of factory water and tip water: ≤ 2mg/L (3) Residual amount of factory water: ≥ 0.3mg/L; (4) Tip water margin: ≥ 0.05mg/L. |
|
5 |
Boron (mg/L) |
0.5 |
1.0 |
|
6 |
Vinyl chloride (mg/L) |
0.005 |
0.001 |
|
7 |
Trichloroethylene (mg/L) |
0.07 |
0.02 |
|
8 |
Dimethoate (mg/L) |
0.08 |
0.006 |
06. Other changes
1. Added total β The requirement to deduct 40K from the radionuclide analysis and evaluation of radioactive indicators and the applicability of the microcystin-LR indicator;
2. The temporary regulations on water quality indicators and limits for small-scale centralized water supply and decentralized water supply have been deleted;
3. Improve the requirements for the quality of drinking water sources;
4. Deleted content related to drinking water management.
Water quality reference index
01. Total Index Adjustment
The reference indicators for water quality have been adjusted from 28 to 55 in GB5749-2006.
02. Add 29 indicators
|
No. |
Index |
Limits |
|
1 |
Vanadium/（mg/L） |
0.01 |
|
2 |
HCH (total)/（mg/L） |
0.005 |
|
3 |
Parathion/（mg/L） |
0.003 |
|
4 |
Methyl parathion/（mg/L） |
0.009 |
|
5 |
Lindane/（mg/L） |
0.002 |
|
6 |
DDT/（mg/L） |
0.001 |
|
7 |
Trichlorfon/（mg/L） |
0.05 |
|
8 |
Thiobandam methyl/（mg/L） |
0.3 |
|
9 |
Daowenling/（mg/L） |
0.3 |
|
10 |
Fluralin/（mg/L） |
0.02 |
|
11 |
Metalaxyl/（mg/L） |
0.05 |
|
12 |
Xicaojin/（mg/L） |
0.03 |
|
13 |
Acephate/（mg/L） |
0.08 |
|
14 |
Formaldehyde/（mg/L） |
0.9 |
|
15 |
Trichloroacetaldehyde/（mg/L） |
0.1 |
|
16 |
Cyanogen chloride (calculated as CN -)/（mg/L） |
0.07 |
|
17 |
Nitrosodimethylamine/（mg/L） |
0.0001 |
|
18 |
Iodiacetic acid/（mg/L） |
0.02 |
|
19 |
1,1,1-Trichloroethane/（mg/L） |
2 |
|
20 |
Ethylbenzene/（mg/L） |
0.3 |
|
21 |
1,2-Dichlorobenzene/（mg/L） |
1 |
|
22 |
Perfluorooctanoic acid/（mg/L） |
0.00008 |
|
23 |
Perfluorooctane sulfonic acid/（mg/L） |
0.00004 |
|
24 |
Dimethyl disulfide/（mg/L） |
0.00003 |
|
25 |
Dimethyl trisulfide/（mg/L） |
0.00003 |
|
26 |
Iodide/（mg/L） |
0.1 |
|
27 |
Sulfide/（mg/L） |
0.02 |
|
28 |
Uranium/（mg/L） |
0.03 |
|
29 |
Radium-226/（mg/L） |
1 |
03. Delete 2 indicators
The two indicators deleted include 2-methylisocamphenol and soil odor.
04. Index name change
| GB5749-2006 | GB5749-2022 |
| Dibromoethylene | 1,2-dibromoethane/(mg/L) |
| Nitrite | Nitrite (calculated as N)/(mg/L) |
| Asbestos (>10 μ m） | Asbestos (fiber>10 μ m) /(10000/L) |
05. Index limit change
|
No. |
Indicator Name |
GB5749-2006 |
GB5749-2022 |
|
1 |
Petroleum (total)/（mg/L） |
0.3 |
0.05 |
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