Water safety plans as a serviceWHO methodAny country

Water safety plans, run for you.

Omeva builds your plan on the WHO method, maps it to the rules where you operate, then runs it every day. Sensors watch the controls that matter, accredited laboratories verify them, and every action leaves evidence an auditor can follow.

Start a plan Ask Omeva

MethodWHO Water Safety Plan manual, 2nd editionTen modules, from team to review

CoverageAny country, local rules mappedRunning in South Africa today

EvidenceAny accredited lab, any sensorOne record per water system

Showing rules for . The WHO method is the core everywhere.

WSP-02 · System description · Live Under control

SiteExample: 300-bed hospital

MethodWHO WSP · Module 2

RulesInternational baseline

RevisionRev 14 · live

Most water safety plans are written for an audit, then filed. The water keeps changing.

Hazards move
Occupancy drops, pipes age, sources shift. A plan that is not watched describes a system that no longer exists.
Evidence scatters
Lab PDFs, logbooks and inboxes. When something goes wrong, the proof is in five places and none of them agree.
People change
The author leaves; the plan stays behind. Omeva keeps the plan running between audits, with the same people answerable for it.

01 · Method

The WHO method, all ten modules, run continuously.

The World Health Organization's Water Safety Plan manual (2nd edition, 2023) sets out ten modules, from assembling the team to reviewing the plan. Omeva runs every one of them as part of the service and keeps the evidence for each step. Choose a module to see what we do.

Module 02 of 10Survey once · live map after

Describing the system

Omeva runs

Evidence you keep

Global core

WHO Guidelines for drinking-water quality, 4th edition with the first, second and third addenda (June 2026): health-based targets, water safety plans and independent surveillance.

Buildings

Same method, building scale. Hospitals, hotels, care homes and portfolios run the ten modules on their internal plumbing, with Legionella in focus.

Small supplies

Scaled to size. Sanitary inspections, a protected source and reliable disinfection, with the same evidence trail.

02 · Ask Omeva

Ask about a reading, a result, a duty or a plan.

Answers are grounded in the WHO method and the rules where you operate. Or describe your water system in a sentence or two and get a starter hazard register, scored and ready for your team to review.

Your context Connecting

Where you operate Water system Your role

Your question

General decision support, not a substitute for your responsible person or the current text of the rules that apply to you. If people may be ill, follow your incident procedure and contact your public-health authority. Questions are answered by our AI provider, so leave out personal details.

AnswersExample

03 · Evidence

No evidence, no green.

Omeva only marks a control as safe when the evidence behind it is current and traceable. Missing or stale data shows as insufficient evidence, so a gap is never hidden behind a tick. Every status links to the reading, result or rule that produced it.

Compliant

Current evidence meets the rule set that applies.

Attention

A limit or trend needs review or action.

Non-compliant

A defined rule is not met. The incident procedure starts.

Insufficient evidence

Required data is missing, stale or unverifiable.

Not assessed

No rule has been applied yet. Nothing is assumed.

Evidence record · H-12 · Illustrative

Hot water return below target in the ward loop

Closed · verified

Hazard registeredMODULE 03
Legionella growth risk if the return loop runs below 55 °C. Scored likelihood 3 × severity 5 = 15, high.
Control validatedMODULE 04
Calorifier set to 60 °C, loop balanced. Thermal profile of 12 outlets on file.
Operational monitoringMODULE 06
TIT-201 reads every 5 minutes. Alarm after 30 minutes below 55 °C.
Excursion02:14
Return at 53.9 °C for 42 minutes. Status moves to attention; action A-118 goes to on-call facilities.
Corrective action closed03:05
Setpoint restored and balancing valve V-7 adjusted. Return back at 57.1 °C.
VerifiedMODULE 07
Sentinel outlets sampled; laboratory reports Legionella not detected. Certificate linked to the sampling points.
ReviewedMODULE 10
Root cause: valve drift. Valve checks added to the maintenance programme (Module 09).

Every line links to its source: the sensor trace, the action record, the laboratory certificate and the approved plan version.

04 · As a service

A plan that runs all year.

Sensors report every few minutes. Exceptions are reviewed weekly, samples verified monthly, the team meets quarterly and the whole plan is reviewed every year. Omeva runs that rhythm. Below is one illustrative year for one water system.

Monitor

Watch the controls

Probes and scheduled checks on the controls that carry the most risk.

Omeva runs: Install, calibrate, watch device health, route alarms
You keep: Site access and the people on the escalation list

Plan

Keep the plan true

A living map, hazard register and improvement plan that change with the site.

Omeva runs: Surveys, risk scoring, versioning, reviews
You keep: Approval of the plan and its changes

Comply

Verify with labs

A risk-based sampling programme with any accredited laboratory.

Omeva runs: Sampling schedule, chain of custody, results linked to points
You keep: Reporting duties to your regulator

Respond

Close every action

Exceptions become actions with owners, deadlines and proof of closure.

Omeva runs: Triage, escalation, follow-up, post-incident review
You keep: Decisions on consumer advice and supply

The duty

Your organisation keeps its legal duty for safe water. Omeva runs the system that helps you meet it, and shows you, at any moment, what is under control and what is not.

05 · Coverage

One method. Local rules.

The WHO method is the same everywhere. What changes is the law, the limits and who you report to. Every engagement starts by mapping the instruments that apply to your site. Select a row to set your jurisdiction across this page.

Where	What the plan maps to	Worth knowing	Omeva pack

Standards and regulations are referenced by name. Omeva does not reproduce them, and a plan always follows the current, licensed text that applies to the site.

06 · Sectors

Wherever people drink, wash or work with water.

The method stays the same; the hazards do not. Each plan starts from what typically goes wrong in your kind of system, then gets specific to yours.

Mines and heavy industry

Typical hazards: Acid mine drainage, metals and sulphate, process water crossing into potable lines
Watch points: pH and conductivity at process dams, residual at the potable plant, community supply pressure

Hospitals and care

Typical hazards: Legionella and Pseudomonas in warm, stagnant water; vulnerable patients; dead legs after refits
Watch points: Hot water flow and return, low-use outlet flushing, mixing valves, augmented-care outlets

Hotels, spas and leisure

Typical hazards: Legionella in showers and spa pools, rooms closed for weeks, seasonal start-ups
Watch points: Return temperatures, spa disinfection and pH, flushing of closed rooms

Property portfolios and malls

Typical hazards: Roof tank ingress, low residual at the extremities, food court and gym outlets, tenant cross-connections
Watch points: Residual and turbidity at tank outlets, conductivity as a change detector, monthly verification

Farms and food

Typical hazards: Borehole nitrate and E. coli, biofilm in drinker lines, dosing of water medication and acids
Watch points: Disinfection at the far end of drinker lines, pH, borehole quality after rain

Communities and small supplies

Typical hazards: Unprotected sources, intermittent supply drawing in contamination, unsafe household storage
Watch points: Sanitary inspections, residual chlorine at the tap, turbidity after rain

For buildings

Legionella.ai

Running a hospital, hotel or care home?

Legionella.ai is our specialist guide to Legionella and building water safety, with country-specific rules and a working Ask assistant. The same Omeva plan engine sits underneath.

Visit Legionella.ai

For laboratories and water specialists.

Offer water safety plans as a service under your own name. You keep the client relationship and the laboratory work; Omeva runs the plan engine, the evidence trail and the reporting.

Talk partnerships

07 · Start

Start a plan.

Tell us about the water system. We reply with questions or a proposal. Pricing is per water system, per month, quoted after scoping, because we price from the real system.

01
Scoping call
Your sites, your rules, what exists today.
02
Site survey and system map
Source to every point of use, verified on site.
03
Plan drafted and validated
Hazards, controls and limits worked through with your team.
04
Plan goes live
Monitoring, laboratory programme, actions and reviews start running.

Scoping brief

Organisation Where you operate

Water system Number of sites

Today

No plan yet Plan on paper Due for review Want it run

Anything we should know

Send it to hello@omeva.ai

08 · Questions

Straight answers.

The short version of what people ask before they start.

Does Omeva replace our responsible person?

No. Your organisation keeps its legal duty and your responsible person approves the plan and its changes. Omeva runs the work around them: monitoring, sampling, actions, reviews and the evidence record.

Can you use the laboratory and sensors we already have?

Yes. Omeva works with any accredited laboratory and with third-party sensors. Results arrive as certificates, spreadsheets, email or a direct feed and are linked to the right sampling point. Accreditation is checked method by method.

Do sensors make us compliant?

No. Probes are an early-warning layer on the controls. They do not detect pathogens, so laboratory verification stays in the plan. Sensor data is labelled operational unless its method supports compliance use.

Which country's rules do you follow?

Yours. The WHO method is the core and local instruments are mapped at scoping. Omeva runs South African plans today under SANS 241-1 and 241-2; other jurisdictions are mapped for each engagement.

Does AI write the plan?

AI drafts and checks; people decide. Omeva uses AI to suggest hazards, draft sections, read laboratory certificates and explain readings. Every finding links back to its evidence, and your team approves the plan.

How is it priced?

Per water system, per month, after a scoping survey. The fee reflects the system's complexity, the points that need continuous monitoring and the laboratory programme the risk assessment calls for.