Pool Reopening Checklist: What to Check After a Closure

Three things have to be true before a pool reopens: the reason it closed is fixed, the steps for that kind of closure are done, and the person allowed to approve reopening has signed off. The CDC's Model Aquatic Health Code (MAHC; check what your state adopted) also has the owner or operator verify that the pool meets all of the code's criteria first.

What should you record about the closure first?

Write down the pool, the time it closed, the reason, and who reported it. Write what was seen, not a guess at the cause. Keep any health department notice with the record.

Do not replace the reason with a vague note like "issue fixed." The next person needs to know why the pool is closed and what is still open.

Which steps match which closure?

Each kind of closure has its own steps. Here is what public sources say for the common ones; your trained operator runs the response.

Closure reason	What the source says before reopening
Thunder or lightning	The National Weather Service says wait at least 30 minutes after the last thunder; new thunder starts the 30 minutes over. The MAHC sets no wait time; it asks for a weather plan that says when to reopen (6.3.4.5.9.1)
Formed poop	MAHC: free chlorine at 2.0 ppm for at least 25 minutes, pH 7.5 or lower, water 77°F or warmer
Diarrhea	MAHC: free chlorine at 20 ppm for at least 12.75 hours, or secondary treatment. Pools with stabilizer have extra steps
Chlorine feed or pump work	CDC: keep swimmers out until the feed and pump have run at least 5 minutes and water quality meets standards
Chemistry out of range	Back inside your code's ranges. The MAHC calls pH below 6.5 or above 8.0, and free chlorine above 10 ppm with swimmers present, imminent health hazards (6.6.3.1). The owner, operator or person in charge must close the pool for them (6.6.3.2), and the health department can also order it fixed or closed right away
Pool bottom not visible	The bottom must be clearly visible. The MAHC lists this as a closure reason
Loose, broken or missing drain cover	MAHC: secured or replaced to the maker's instructions; pool stays closed until done

For poop in the water, the CDC also has response guidance for pool staff with a response log. For weather, the National Weather Service's lightning safety page says your written plan should name who watches the weather and who decides. Do not reopen just because the rain stopped.

For chemical or equipment work, follow staff training, the maker's instructions and the product label. For an emergency, follow your emergency plan and call emergency services first. Paperwork comes after.

What belongs on the reopening checklist?

Use this template and add any fields your health department needs.

Part of the record	What to write down
Closure	Pool, reason, date, time and who reported it
Directions	Which procedure applies and any health department instructions
Work	What was done, when and by whom
Checks	Each required check, the actual result, the time and the checker
Water at reopening	Free chlorine and pH, and stabilizer level if used
Approval	Who approved and any outside approval needed
Reopening	Actual reopening time and who told staff
Follow-up	Work still open, who owns it and when it will be reviewed

The "water at reopening" row comes from the MAHC's body fluid response log (section 6.4.1.8.3). That log also asks for the time of the incident, the type of body fluid, the water readings at the time, and the steps used. Our guide to fecal incident response records goes into that log.

How do you check that the problem is fixed?

Use this rule: reopen only when every row on the checklist has a real result, not just a check mark.

1. Compare the work done and the results with the steps for that closure.
2. Check the whole response. A good water reading does not settle a broken grate or a storm.
3. If any result is missing or unclear, keep the pool closed and ask the responsible person.
4. If the health department ordered the closure, ask it what is needed and whether it must approve or return.
5. Get the approval from the person your facility plan names.

A made-up example: a community pool closes because the chlorine feed pump failed. The repair note says the pump is fixed. The manager still checks that the feed and pump have run at least 5 minutes, that free chlorine and pH are back in range, and that the approver signed off. Writing up a repair and approving reopening are two different steps.

What should staff know before swimmers return?

Tell staff the pool is reopening, who decided, and which areas are open. Give them a contact for new concerns. Record the actual reopening time.

If a new problem shows up, start the closure steps again. An earlier approval does not cover a new problem.

Before swimmers return, run your normal opening checks as well. Our daily opening checklist guide and lightning closure policy guide can help.

How can you keep the closure history together?

Keep the reason, response records, check results and approvals in one place. Review the record afterward for missing details.

Poolean tracks pool closures and the reopening steps your team has recorded, so the approval and the readings behind it sit on the same record. Its water testing page explains the related records, and you can book a 30-minute call to see them.

The short version

• Start with the closure reason and your local code.
• Match the steps to the reason: lightning, poop, chemistry or equipment each differ.
• Under the MAHC, the operator checks that the pool meets all code criteria before reopening.
• Write real results, water readings at reopening and who approved.
• Tell staff before swimmers return.