G/TBT/N/UGA/1393  
13 September 2021  
(21-6741) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  English  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6  
 
1. Notifying Member:  UGANDA   
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible:   
Uganda National Bureau of Standards  
Plot 2 -12 ByPass Link, Bweyogerere Industrial and Business Park  
P.O. Box 6329  
Kampala, Uganda  
Tel: +(256) 4 1733 3250/1/2  
Fax: +(256) 4 1428 6123  
E-mail: info@unbs.go.ug  
Website: https://www.unbs.go.ug  
Name and address (including telephone and fax numbers , email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated if dif ferent from above:   
3. Notified under Article 2.9.2 [   ], 2.10.1 [   ], 5.6.2 [X], 5.7.1 [   ], other :  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading. ICS numbers may be provided in addition, where applicable):  Water; 
Ordinary natural water, not containing added sugar, other sweetening matter or 
flavoured; ice and snow (excl. mineral waters and aerated waters, sea water, distilled 
water, conductivity water or water of similar purity) (HS 220190); Exa mination of water 
for chemical substances (ICS 13.060.50)  
5. Title, number of pages and language(s) of the notified document:  DUS 2416:2021, 
Standard Test Method for Hardness in Water, First Edition (12 page(s), in English)  
6. Description of content:  This Draft Uganda Standard covers the determination of 
hardness in water by titration. This test method is applicable to waters that are clear in 
appearance and free of chemicals that will complex calcium or magnesium. The lower 
detection limit of this test m ethod is approximately 2 to 5 mg/L as CaCO3; the upper limit 
can be extended to all concentrations by sample dilution. It is possible to differentiate 
between hardness due to calcium ions and that due to magnesium ions by this test 
method.  
7. Objective an d rationale, including the nature of urgent problems where 
applicable:  Prevention of deceptive practices and consumer protection; Quality 
requirements  G/TBT/N/UGA/1393  
 
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  8. Relevant documents:   
1. ASTM D1066 Practice for Sampling Steam  
2. ASTM D1129 Terminology Relating to Water  
3. ASTM D1193 Specification for Reagent Water  
4. ASTM D2777 Practice for Determination of Precision and Bias of Applicable Test 
Methods of Committee D19 on Water  
5. ASTM D3370 Practices for Sampling Water from Closed Conduits  
9. Proposed date of adoption:  December 2021  
Proposed date of entry into force:  Not applicable.  
10. Final date for comments:  60 days from notification  
11. Texts available from:  National enquiry point [X] or address, telephone and fax 
numbers and email and website addresses, if available , of other body:   
Uganda National Bureau of Standards  
Plot 2 -12 ByPass Link, Bweyogerere Industrial and Business Park  
P.O. Box 6329  
Kampala, Uganda  
Tel: +(256) 4 1733 3250/1 /2 
Fax: +(256) 4 1428 6123  
E-mail: info@unbs.go.ug  
Website: https://www.unbs.go.ug