Malawi has enacted strict chemical standards for water treatment substances, specifically targeting polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate.
Malawi Sets New Standards for Water Treatment Chemicals
Importers must comply with DMS 91-7: 2024 for specific coagulants used in drinking water.
What changed
Strict quality controls apply to polyaluminium chloride hydroxide and sulfate in potable water treatment.
HS codes 282732 and 282749 define the import and use boundaries for these chemicals.
DMS 91-7: 2024 framework governs chemicals used for water treatment intended for human consumption.
Who it affects
Chemical importers must ensure products align with the specified HS codes and safety standards.
Key dates
Compliance Answer: Malawi’s Chemical Standards for Polyaluminium Chloride Hydroxide and Polyaluminium Chloride Hydroxide Sulfate in Water Treatment
Malawi has established strict regulatory requirements for polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate used in water treatment for human consumption under Draft Malawi Standard DMS 91-7:2024. These requirements include chemical specifications, testing methods, and safe handling rules to ensure human health and safety, consumer protection, and trade facilitation1.
Regulation Analysis
1. Applicable Standard and Scope
The Draft Malawi Standard DMS 91-7:2024 governs the use of polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate in water treatment. It specifies:
- Product coverage: Polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate (HS code: 290319; ICS code: 71.100.80)1.
- Objective: Protection of human health, prevention of deceptive practices, and facilitation of trade1.
- Exclusions: The standard does not apply to chloromethane, chloroethane, dichloromethane, chloroform (trichloromethane), carbon tetrachloride, or 1,2-dichloroethane (ethylene dichloride)1.
2. Key Requirements
The standard mandates the following for compliance:
| Regulation | Key Requirement | Deadline/Threshold | Authority |
|---|---|---|---|
| DMS 91-7:2024 | Specifies chemical composition, purity, and contaminant limits (e.g., arsenic, mercury, antimony) for polyaluminium chloride compounds1. | Not specified (draft stage) | Malawi Bureau of Standards (MBS) |
| DMS 91-7:2024 (Annex A) | Requires safe handling procedures for storage, transportation, and usage1. | Not specified | MBS |
| Test Methods | Mandates testing per ISO 11885 (elements by ICP-OES), ISO 12846 (mercury), and ISO 17378-2 (arsenic/antimony)1. | Not specified | MBS (via accredited labs) |
| Sampling | Requires compliance with MS 169 (safety in sampling) and ISO 6206 (sampling vocabulary)1. | Not specified | MBS |
| Lab Water Standards | Water used for testing must meet MS 2079 (water for analytical laboratory use)1. | Not specified | MBS |
3. Contaminant Limits
The standard imposes strict limits on impurities, including:
- Arsenic (As): Tested via ISO 17378-21.
- Mercury (Hg): Tested via ISO 128461.
- Other elements: Tested via ISO 11885 (e.g., aluminum, iron, lead)1.
- Organic contaminants: Explicitly prohibits trichloromethane (chloroform), carbon tetrachloride, and 1,2-dichloroethane1.
4. Labelling and Consumer Information
- The standard aims to prevent deceptive practices by ensuring accurate labelling of chemical composition and purity1.
- No specific labelling format is detailed in the provided sources, but compliance with general MBS labelling rules is implied.
5. Compliance Process
- Testing: Products must be tested by accredited laboratories using the specified ISO/MS methods1.
- Certification: Manufacturers/importers must obtain certification from MBS to demonstrate compliance with DMS 91-7:20241.
- Handling: Safe handling procedures (Annex A) must be followed during storage, transport, and application1.
6. Enforcement and Penalties
- The Malawi Bureau of Standards (MBS) is the responsible authority for enforcement1.
- Penalties for non-compliance are not specified in the provided sources but typically include fines, product recalls, or suspension of certification under Malawi’s broader standards regime.
7. Timeline and Public Consultation
- Draft Stage: The standard is currently a draft (as of June 2025)1.
- Comment Period: Stakeholders had 60 days from notification to submit comments (deadline not specified in sources)1.
- Adoption/Entry into Force: Dates for adoption and enforcement are "to be determined"1.
Summary Answer
Malawi’s Draft Malawi Standard DMS 91-7:2024 sets stringent requirements for polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate used in water treatment, including chemical purity, contaminant limits (e.g., arsenic, mercury), and safe handling procedures1. Compliance requires testing via specified ISO/MS methods (e.g., ISO 11885, ISO 12846, ISO 17378-2) and certification by the Malawi Bureau of Standards (MBS)1. The standard excludes certain chlorinated hydrocarbons (e.g., chloroform, carbon tetrachloride) and aligns with broader objectives of consumer protection and trade facilitation1. While the draft is under public consultation (60-day comment period), adoption and enforcement dates remain unconfirmed1. For enforcement, stakeholders must engage with MBS for certification and ongoing compliance1.
Sources
- ↩ Committee on Technical Barriers to Trade – Notification – Malawi – Chemicals used for treatment of water intended for human consumption : polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate https://docs.wto.org/dol2fe/Pages/SS/directdoc.aspx?filename=Q:/G/TBTN25/MWI210.pdf&Open=True