What a water management plan has to contain to be worth having

Nobody is bidding on this query, which is a small signal about the market: plans get sold as documents rather than as programmes. A plan that sits in a binder is worth nothing at all, and the difference between the two is visible in six sections.

1. A description of the system that matches reality

A schematic of the actual water system, as built and as modified, showing incoming supply, generation, storage, distribution, recirculation, and every device that atomises water, from cooling towers to spa pools and hot tubs. This is the section most often wrong, because buildings change and plans do not.

If the plan shows a branch that was removed in a refurbishment, or misses one that was added, everything downstream of it in the plan is unreliable. Correcting the drawing against the building is the job of the walkdown described in what a risk assessment covers.

2. Where control is actually exercised

The points in the system where a parameter is held within limits, and which parameter. Temperature at generation, temperature at return, disinfectant residual at defined points, flow through the recirculation. These are the control points, and they are specific locations rather than general intentions.

3. Limits, and what happens when they are exceeded

For each control point, the range it is meant to stay in, how often it is checked, who checks it, and what happens if it is out. The last of those four is where most plans stop being useful, because “investigate” is not a procedure.

What the limits should be is set by the guidance the facility operates under and by local requirements. They are established for the building rather than copied.

4. Monitoring that somebody actually does

A schedule of checks, in the form of a record somebody signs. Weekly flushing of little-used outlets, monthly temperature checks at sentinel points, quarterly inspections, annual reviews. The value of this section is proportional to how realistic it is: a schedule nobody can keep produces a falsified record, which is worse than no record.

5. Verification, which is not the same as monitoring

Monitoring asks whether the plan is being followed. Verification asks whether following it is working. Environmental sampling belongs here, and this is the section that tells you what to sample, where in the system to sample, how often and by which method.

A plan whose only mention of sampling is that it will happen is not specifying verification. Neither is one that leaves the method open, a choice set out in test kits versus laboratory culture.

6. Documentation and review

Who holds the plan, who is responsible for each part, when it was last reviewed, and what triggers a review outside the schedule: a change of use, a refurbishment, a shutdown, a positive result, an occupancy change.

The test of a plan, in one question

Hand it to the person who maintains the building and ask them to show you where they record the temperature at a sentinel outlet. If they can, you have a programme. If they cannot, you have a document, and the document will not help you.

Which standard or guidance your plan should be written against, and whether your state or city imposes its own requirements on top, is a local question. We establish it for the facility before designing sampling, as described under water management programmes.