When Drinking Water Becomes a Health Risk: Understanding Your Legal Rights

Access to clean drinking water is essential to human health and well-being. Every household should be able to rely on its water supply without worrying that drinking, cooking or washing with that water could cause illness.

However, water contamination remains a serious concern for communities when sewage enters water systems, treatment facilities fail, infrastructure deteriorates or industrial activities pollute natural water sources. When these problems occur, residents may be exposed to harmful bacteria, viruses and chemicals that can place their health at risk.

For affected households, the consequences can be overwhelming. Families may face unexpected medical expenses, children may become seriously ill, and residents may be forced to find alternative water sources at additional cost.

But what happens when the water supplied to a community is unsafe? Who is responsible for protecting residents, and what legal options are available when contaminated water causes illness?

South African law recognises access to water as a constitutional right and places responsibilities on institutions involved in water provision and pollution control. Understanding these protections can help residents know when to raise concerns and when to seek legal assistance.

The right to safe water under South African law

The Constitution of the Republic of South Africa, 1996, provides important protections relating to water, health and the environment.

Section 27(1)(b) recognises everyone’s right to have access to sufficient water. Section 24 also protects everyone’s right to an environment that is not harmful to their health or well-being. It requires reasonable legislative and other measures to prevent pollution and environmental degradation.

These constitutional provisions establish that access to water and environmental protection are not simply service delivery concerns. They are connected to human dignity, public health and the well-being of communities.

The Water Services Act 108 of 1997 further provides for access to basic water supply and sanitation. It establishes a regulatory framework for water services institutions and provides for national standards governing water quality and service delivery.

Although these rights do not automatically guarantee compensation whenever a water supply problem occurs, they provide an important legal foundation for holding responsible institutions accountable where their obligations are not fulfilled.

When does drinking water become unsafe?

Drinking water can become unsafe when harmful substances or microorganisms enter the supply system or when treatment processes fail to remove contaminants effectively.

Common sources of contamination include:

* Sewage leaks and wastewater entering drinking water systems.

* Industrial waste and chemical spills.

* Poorly maintained water pipes and distribution infrastructure.

* Contamination of rivers, dams and groundwater.

* Inadequate water treatment and disinfection.

* Improper disposal of household, commercial or industrial waste.

Some contaminated water may have an unusual smell, colour or taste. However, harmful microorganisms and certain chemicals cannot necessarily be detected through the senses.

This is why proper water quality testing is important. Residents should not assume that water is safe simply because it looks clean.

How can contaminated drinking water affect your health?

The health consequences of contaminated water depend on the substance involved, the level of exposure and the individual’s health.

Water contaminated with disease-causing microorganisms may cause diarrhoeal illnesses, vomiting, stomach cramps and other infections. Chemical contamination may also create health risks, particularly where exposure continues over an extended period.

Children, older people and individuals with weakened immune systems may be particularly vulnerable to complications.

In serious cases, illness may require hospitalisation, ongoing medical treatment or rehabilitation. Families may also experience financial pressure when an affected person cannot work or requires long-term care.

It is important to establish the actual cause of an illness through appropriate medical assessment. Similar symptoms can result from different conditions, and illness occurring after drinking from a particular source does not automatically prove that the water caused it.

Who is responsible for ensuring that drinking water is safe?

Responsibility depends on the source of contamination and the legal duties of the parties involved. Several institutions and private parties may have responsibilities relating to water quality and pollution prevention.

1. Municipalities and water services authorities

Municipalities acting as water services authorities have an important responsibility for ensuring access to water services within their areas.

The Water Services Act requires water services institutions to comply with applicable compulsory national standards. These standards include requirements relating to drinking water quality.

The revised Compulsory National Water and Sanitation Services Standards were published in Government Gazette 52814 on 6 June 2025. They include requirements relating to water quality monitoring and the management of drinking water quality failures.

Where a water supply poses a health risk, the responsible water services institution must take appropriate steps to address the problem and communicate relevant risks to affected consumers.

The Department of Water and Sanitation also identifies water services authorities as having primary responsibility for providing safe drinking water, monitoring its quality and informing consumers of health risks.

A failure to investigate complaints, monitor water quality or respond appropriately to a known danger may raise questions about whether the responsible authority has fulfilled its legal obligations.

2. The Department of Water and Sanitation

The Department of Water and Sanitation has national responsibilities relating to water resource management, regulation and oversight.

Its role includes establishing national standards, monitoring water services institutions and supporting or intervening where water services responsibilities are not being properly fulfilled.

The Department also has responsibilities under the National Water Act 36 of 1998 to protect and manage water resources.

However, the Department does not automatically become liable whenever a municipality supplies contaminated water. Its potential responsibility must be assessed against its specific legal duties and the facts of the incident.

3. Businesses and industrial operators

Private businesses may also be responsible for water contamination.

Industrial operations, mining activities, chemical processing and improper waste disposal can introduce pollutants into rivers, groundwater and other water resources.

Section 19 of the National Water Act places a duty on certain persons responsible for land to take reasonable measures to prevent pollution where activities or conditions on that land cause, have caused or are likely to cause pollution of a water resource.

Depending on the circumstances, these measures may include stopping the activity causing pollution, containing pollutants, removing the source and remedying the effects.

A business whose activities contaminate a water resource may face regulatory consequences and potentially civil liability where the legal requirements for a claim are established.

What must happen when a water supply poses a health risk?

Water contamination should not be treated as an ordinary service interruption. When drinking water presents a health risk, residents need accurate information and appropriate action.

The 2025 Compulsory National Water and Sanitation Services Standards include an incident management protocol for drinking water quality failures. It addresses the classification of water quality failures, the response required and communication with affected communities.

Depending on the nature and severity of the incident, appropriate measures may include:

* Conducting water quality tests to identify the contaminant.

* Informing affected residents about the health risk.

* Providing clear instructions on whether the water should be boiled, treated or avoided.

* Arranging alternative water supplies where necessary.

* Repairing damaged infrastructure or addressing the source of contamination.

* Monitoring water quality to establish whether the supply is safe again.

Residents should follow official health advisories. Boiling water may help address certain biological contaminants, but it does not remove all chemical pollutants. Where authorities advise residents not to use the water, that instruction should be followed.

Can you claim compensation if contaminated water makes you ill?

Yes, it may be possible to pursue a civil claim where contaminated water causes illness or injury and another party is legally responsible for the harm.

However, proving that a water supply was contaminated is not the same as proving that a particular party is liable for an individual’s illness.

Under South African delictual law, a claim generally requires proof of the relevant elements, including wrongfulness, fault where required, causation and damage.

This means an affected person may need to establish:

Wrongfulness: There must be a legal basis for finding that the responsible party’s conduct or failure to act was wrongful.

Negligence or fault: Where negligence is relied upon, it must be shown that the party failed to take reasonable steps that could have been expected in the circumstances.

Causation: There must be a legally sufficient connection between the conduct, the contamination and the illness or injury suffered.

Damage: The affected person must have suffered legally recognised harm or financial loss.

For example, a municipality may receive repeated complaints about contaminated water but fail to investigate or take reasonable steps to address the problem. If residents subsequently become ill and evidence establishes a connection between the unsafe water and their illnesses, the circumstances may justify an investigation into possible legal liability.

Each matter must be assessed individually. The source of contamination, the responsibilities of the parties and the available medical and technical evidence will all be relevant.

What compensation may be available?

Where legal liability is established, an affected person may be able to claim compensation for certain losses.

Depending on the circumstances, this may include:

* Medical expenses: Reasonable costs of medical consultations, medication, hospital treatment and rehabilitation.

* Loss of income: Financial losses suffered when illness prevents someone from working.

* Future medical expenses: Anticipated treatment and care costs where ongoing health complications are established.

* Loss of earning capacity: Where an injury has affected a person’s ability to earn an income in the future.

* Pain and suffering: General damages for pain, suffering and loss of amenities of life, where legally recoverable.

In cases involving children, the potential long-term consequences of an illness or injury may also need to be considered.

Compensation is not automatic. The nature of the claim, the evidence and the applicable legal principles determine what may be recoverable.

What evidence should you keep if you suspect water contamination?

Evidence can play an important role when reporting contaminated water and considering a possible legal claim.

Affected residents should keep the following records where possible:

1. Medical records

Keep medical reports, hospital records, prescriptions, laboratory results and documents relating to treatment received.

2. Water quality test results

Where possible, obtain testing from an appropriately qualified laboratory. The results should identify the source of the sample, the date of collection and the contaminants tested.

3. Photographs and videos

Document visible signs of contamination, sewage leaks, discoloured water, damaged pipes or other conditions that may help establish what happened.

4. Complaints and correspondence

Keep copies of complaints submitted to the municipality, water services provider or relevant government department. Record reference numbers, dates and responses.

5. Records of exposure and illness

Make a record of when symptoms began, where the affected person obtained water and whether other household members experienced similar symptoms.

6. Financial records

Keep receipts for medical treatment, transport to healthcare facilities, medication and other expenses associated with the illness.

Residents should not put themselves at risk by handling potentially contaminated water. Water sampling should be carried out using appropriate procedures.

What can you do if your municipality does not respond?

Residents who suspect that their drinking water is unsafe should report the problem rather than assume that it will resolve itself.

The following steps may help:

1. Contact the municipality or water services provider and report the suspected contamination.

2. Request an investigation and appropriate water quality testing.

3. Ask for written information about the findings and steps being taken.

4. Escalate unresolved concerns to the Department of Water and Sanitation.

5. Seek medical assistance if anyone develops symptoms after possible exposure.

6. Keep records of complaints, test results and medical expenses.

7. Consider legal advice if the contamination continues or has caused illness or injury.

Where a serious health risk remains unresolved, affected residents may need to explore further legal remedies. Depending on the circumstances, these may include seeking appropriate corrective action or pursuing a claim for damages.

Conclusion

Safe drinking water is essential to protecting public health and human dignity. When contamination puts a community at risk, residents should be able to obtain information, report the problem and expect responsible institutions to take appropriate action.

South African law provides constitutional protections and places legal responsibilities on water services authorities and parties whose activities cause pollution. Where a failure to meet a legal duty results in illness or injury, affected individuals may have grounds to pursue legal remedies.

However, establishing responsibility requires proper investigation. Evidence of contamination, the conduct of the responsible party, medical records and proof of causation are all important when assessing a possible claim.

Communities should not have to face the health and financial consequences of unsafe water without accountability.

Has contaminated drinking water affected you or your community? Ndou Attorneys can assist in assessing the circumstances and explaining the legal options that may be available.