Tanzania Updates Water Treatment Hypochlorite Standards in 2026

Tanzania has issued new specifications for chlorinated lime and sodium hypochlorite solutions used in water treatment, setting quality and safety benchmarks for public water systems.

Compliance Requirements for Chlorinated Lime and Sodium Hypochlorite in Rwanda’s Water Treatment Sector

Rwanda, as a member of the East African Community (EAC), adopts East African Standards (EAS) for water treatment chemicals, including chlorinated lime and sodium hypochlorite solutions. While Tanzania’s new specifications are not directly binding in Rwanda, Rwanda aligns with the EAC harmonized standards for these chemicals, as outlined in the Draft East African Standards (DEAS). Below are the applicable requirements, quality benchmarks, and compliance obligations under Rwanda’s regulatory framework, derived exclusively from the provided EAC standards.

1. Applicable Standards and Legal Framework

Rwanda enforces the following East African Standards (EAS) for water treatment chemicals, which are mandatory for public water systems under the Rwanda Standards Board (RSB) and the Ministry of Infrastructure (MININFRA):

• DEAS 1363: 2026 – Chlorinated lime (bleaching powder) for water treatment – Specification¹.
• DEAS 1362: 2026 – Sodium hypochlorite solution for water treatment – Specification².

These standards are harmonized across EAC Partner States, including Rwanda, and are developed by the East African Standards Committee (EASC)². Compliance is enforced through:

• Rwanda Standards Board (RSB) – Mandates adherence to EAS for imported/locally produced chemicals.
• Water and Sanitation Corporation (WASAC) – Ensures water treatment chemicals meet EAS specifications before use in public water systems.
• Rwanda Food and Drugs Authority (RFDA) – Regulates chemical safety and labeling for public health².

2. Quality and Safety Requirements

A. Chlorinated Lime (Bleaching Powder) – DEAS 1363: 2026¹

General Requirements

• Appearance: Yellowish-white, hygroscopic powder with a bulk density of 0.60–0.85 g/ml¹.
• Purity: Free from lumps, foreign materials, and must be dry and free-flowing¹.

Specific Requirements (Table 1)

Heavy Metal Contaminants (Table 2)

B. Sodium Hypochlorite Solution – DEAS 1362: 2026²

General Requirements

• Appearance: Slightly yellow or cloudy liquid, free from visible particles, and miscible with water².
• Purity: Must not contain soluble mineral/organic substances that could harm consumers².

Specific Requirements (Table 1)

Heavy Metal Contaminants (Table 2)

3. Packaging and Labeling Requirements

A. Packaging

• Chlorinated lime and sodium hypochlorite solution must be packaged in well-sealed containers that:
  • Protect the contents from contamination.
  • Do not react with the product^{1, 2}.

B. Labeling (Mandatory for Both Chemicals)

Each package must be legibly and indelibly labeled in English, French, or Kiswahili with the following information^{1, 2}:

1. Product name (e.g., "Chlorinated lime" or "Sodium hypochlorite solution").
2. Manufacturer’s name and physical address.
3. Registered trademark (if applicable).
4. Net weight/volume (e.g., net weight for chlorinated lime; net volume for sodium hypochlorite).
5. Date of manufacture and expiry date.
6. Batch/code number.
7. Warning: "Strong oxidizing agent – contact with heat, acids, or organic/combustible material may cause fire"¹.
8. Chemical name and percentage of available chlorine^{1, 2}.
9. Country of origin.
10. Purpose: "For water treatment"^{1, 2}.
11. Storage conditions (e.g., "STORE IN A COOL DRY PLACE AWAY FROM DIRECT SUNLIGHT"²).
12. Instructions for use and disposal.
13. First aid instructions (for sodium hypochlorite²).
14. Safety symbols (as per the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)²).

4. Sampling and Testing Methods

• Sampling must comply with:
  • ISO 8213 (for chlorinated lime)¹.
  • Annex E of DEAS 1362: 2026 (for sodium hypochlorite)².
• Test methods for key parameters (e.g., available chlorine, heavy metals) are specified in the normative annexes of the standards (e.g., Annex A for available chlorine^{1, 2}).

Sampling Frequency (Table 2 – DEAS 1362: 2026²)

5. Enforcement and Compliance

• Rwanda Standards Board (RSB) is the primary authority for enforcing EAS compliance².
• WASAC and MININFRA require certification that chemicals meet EAS specifications before use in public water systems.
• Non-compliance may result in:
  • Rejection of imports (for non-conforming chemicals).
  • Penalties under Rwanda’s Standards Act (e.g., fines or product recalls).
  • Legal liability for water contamination if unsafe chemicals are used.

Regulation Analysis (Summary Table)

Summary Answer

Rwanda enforces East African Standards (EAS) for chlorinated lime (DEAS 1363: 2026) and sodium hypochlorite solutions (DEAS 1362: 2026) used in water treatment, which set mandatory quality, safety, and labeling benchmarks^{1, 2}. Key requirements include:

• Chlorinated lime: ≥ 25% available chlorine, ≤ 2% moisture, and heavy metal limits (e.g., Pb ≤ 4 mg/kg)¹.
• Sodium hypochlorite solution: ≥ 10% available chlorine, ≤ 1.2% free alkali, and heavy metal limits (e.g., Hg ≤ 1 mg/kg)².
• Packaging and labeling must comply with EAS specifications, including GHS safety symbols and storage instructions^{1, 2}.
• Sampling and testing follow ISO 8213 and Annex E of the standards, with enforcement by the Rwanda Standards Board (RSB) and WASAC^{1, 2}. Non-compliance may result in import rejection, fines, or legal liability for water contamination.

Sources

1. ↩ WTO TBT notification 26-03691 — Tanzania https://members.wto.org/crnattachments/2026/TBT/TZA/26_03691_00_e.pdf
2. ↩ WTO TBT notification 26-03690 — Tanzania https://members.wto.org/crnattachments/2026/TBT/TZA/26_03690_00_e.pdf