Insurance and Business Continuity: The Water Angle

Water rarely appears on the first page of a business-continuity plan. Fire, load-shedding, cyber risk — those get the headlines. But for many Johannesburg businesses, an unplanned water interruption is just as capable of halting operations, triggering a hygiene-compliance failure, or forcing a temporary closure. Insurers are starting to notice, and so should you.

Why Water Is a Genuine Business-Continuity Risk in Johannesburg

Johannesburg Water’s own audited figures for 2024/25 report non-revenue water at 44.8% — meaning a significant portion of treated water leaving the system never reaches a paying consumer. Ageing infrastructure, pressure fluctuations, and unplanned main bursts are the usual culprits. The city’s reservoir system holds roughly 27 hours of citywide storage buffer, which is a reasonable buffer under normal conditions but offers limited headroom during a protracted incident.

For a restaurant, a medical practice, a manufacturing facility, or any business that depends on consistent water supply to remain operational or compliant, a 12- to 24-hour outage is not a minor inconvenience — it is a business-interruption event. Your continuity plan should treat it accordingly.

What Insurers Are Beginning to Ask

Business-interruption insurance traditionally focuses on physical damage: fire, flood, theft, equipment breakdown. Water supply failure does not always fit neatly into those categories unless you have explicitly scheduled it or unless your policy includes a utility-interruption clause.

What is changing is that underwriters — particularly those working with commercial properties in municipalities with documented infrastructure stress — are beginning to ask more structured questions during risk assessments:

• Does the property have an independent or backup water supply?
• Is there documented storage capacity?
• Are there water-quality testing records?
• Is there a written response procedure for supply interruptions?

None of this is universal. Policy wording varies considerably between insurers and between commercial and domestic products. The honest position is: you need to read your current policy carefully and have a direct conversation with your broker. Do not assume coverage exists, and do not assume it does not.

How a Backup Water System Supports Your Continuity Case

Having a backup system does not guarantee a better premium or broader cover — insurers make their own risk calculations. What it does do is give you something concrete to demonstrate when a risk assessor or underwriter asks about your water-resilience posture.

Typical backup approaches for commercial properties include:

Approach	Typical installed cost (rough guide)	Best suited to
Tank-and-pump backup system	R20,000–R40,000; whole-house/small commercial around R55,000	Offices, small retail, residential
Borehole system (complete)	R60,000–R100,000 (most fall here); full range R40,000–R150,000	Medium to large commercial, industrial
Borehole pump only (installed)	R15,000–R35,000	Existing borehole with new pump replacement

These are indicative ranges only — confirm actual costs via quotes before budgeting.

Beyond the hardware, continuity planners and insurers respond well to documentation: a written water-risk protocol, maintenance logs, and evidence of regular water-quality testing against SANS 241 (2024 edition), the South African national drinking-water quality standard. For potable uses, test first, treat second — do not rely on a system’s theoretical output without independent verification.

For a broader overview of commercial-grade options, the commercial water solutions section of this site covers the full range of approaches, from rainwater harvesting to municipal backup storage.

If you're mapping out a water-resilience plan for your business and want to know what a properly specified system would cost, get three free quotes from vetted installers — no obligation.

What to Put in Your Business-Continuity Plan

A water-continuity section does not need to be lengthy, but it should address four practical questions:

1. What is our minimum daily water requirement? For reference, South Africans use on average about 237 litres per person per day (IWA Water Policy figure), which is above the global average of around 173 litres. Commercial usage varies considerably by sector — calculate your own operational minimum, not a generic estimate.

2. How long can we operate on stored supply? Map your storage volume against your operational minimum. Be honest about what processes can be paused and which cannot.

3. Who is responsible, and what is the escalation path? Name a specific person. Document who contacts the municipality, who contacts your water-solutions provider, and at what point you consider invoking business-interruption cover.

4. When did we last test water quality? If your backup source is a borehole or rainwater harvest, quality can vary. Schedule periodic testing against SANS 241 and keep the records — both for operational safety and because an insurer may ask for them.

If you are exploring how leasing arrangements might reduce the capital burden of installing a commercial system, the article on commercial water system leasing options sets out how those structures typically work. And if you are earlier in your thinking, the commercial water backup basics post is a useful starting point before you engage any supplier.

Talking to Your Broker: What to Raise

Before you invest in infrastructure, have the insurance conversation first. Specific questions worth raising with your commercial broker:

• Does our current business-interruption policy cover utility supply failure, including water?
• Is there a waiting period or minimum interruption duration before a claim is valid?
• Would documented backup water capacity affect our risk classification?
• Are there any endorsements we should consider adding?

Record the answers in writing. If your broker is uncertain, request clarification from the underwriter directly. Policy language is precise; verbal assurances are not.

Once you know what your insurer expects, you'll want accurate system costs to build your case — compare quotes from qualified water-solutions providers and get the numbers you need.

The Practical Takeaway

Water risk is not exotic. In Johannesburg, with its documented infrastructure pressures and a supply buffer measured in hours rather than days, it is a routine operational consideration for any business that cannot afford an unplanned closure. Treating it as a continuity risk — with documentation, a tested backup system, and an informed conversation with your insurer — is simply good management. Whether it affects your premium is between you and your broker. Whether it keeps you trading during an interruption is a question you can answer yourself.