Free pool log for Florida DH 921
Your monthly pool log, filled in on your phone and ready to print
Type each day's chlorine, pH and filter readings at the pool deck. Chlorlog lays them out in the DH 921 columns and prints a clean, complete month for your records and the health inspector.
- Free, no sign-up
- Saved on your phone
- Prints or saves as PDF
Sample
Monthly Swimming Pool Report
| Day | Chlorine residual | pH | Remarks | ||||
|---|---|---|---|---|---|---|---|
| 9 AM | 1 PM | 4 PM | 9 AM | 1 PM | 4 PM | ||
| 1 | 2.5 | 2.0 | 1.5 | 7.4 | 7.4 | 7.6 | Backwash |
| 2 | 3.0 | 2.5 | 2.0 | 7.4 | 7.5 | 7.5 | |
| 3 | 2.0 | 1.5 | 0.8 | 7.6 | 7.6 | 7.8 | Added chlorine 4 PM |
| 4 | 3.0 | 2.5 | 2.5 | 7.4 | 7.4 | 7.4 | TA 100 |
* Outside the range in rule 64E-9.004 for a conventional pool (1 to 10 mg/L).
Why Chlorlog
Stop rewriting a wet, smudged clipboard sheet
The readings you already take, in the order the form asks for them, without the paper.
Every slot on the form
Chlorine and pH at 9 AM, 1 PM and 4 PM, filter vacuum and pressures, flow, vacuuming, patrons and remarks: the DH 921 columns, day 1 to 31.
Odd readings stand out
A chlorine or pH reading outside the range in rule 64E-9.004 for your pool type is marked on screen and on the printout, so you catch it the same day.
A neat month to hand over
One tap prints the whole month in landscape, or saves it as a PDF you can email to the manager or keep in a folder.
Your entries stay with you
No account and no upload. Readings are saved in the browser on your phone as you type, and are still there tomorrow.
How it works
Three steps, every day
Add the pool once
State permit number, pool name, address and volume. They print at the top of every month, and are saved in this browser on this device.
Type today's readings
Pick the day and fill in what you tested. Each entry saves on your phone as you type.
Print the month
At month end, or whenever the inspector asks, print it or save it as a PDF.
Built from the official form
The same columns the Florida Department of Health prints
Florida pools keep the daily record on form DH 921, and rule 64E-9.004(11) allows a customized form with the same information. Chlorlog reproduces the form's fields and reading slots.
Form source
DH 921, 3/98, Monthly Swimming Pool Report, from the Florida Department of Health swimming pools page, read October 21, 2026.
Ranges: rule 64E-9.004, F.A.C. (effective 6-11-2023): pH 7.0 to 7.8; free chlorine 1 to 10 mg/L in conventional pools, 1 to 5 in indoor conventional pools, 2 to 5 in spa-type pools.
What prints
A landscape page titled Monthly Swimming Pool Report with your permit number, pool name, address, volume and month, then one row per day with every DH 921 column, and a note naming the form it follows.
Outside Florida
A daily pool log sheet for any state
Free chlorine, combined chlorine, pH, alkalinity, cyanuric acid, temperature and initials, filled and printed the same way. State guides link to each official form.
Daily pool log sheet
Free and combined chlorine, pH, alkalinity, cyanuric acid, temperature and initials.
Open the log sheetFAQ
Questions operators ask
Is Chlorlog free?
Yes. The Florida DH 921 filler and the daily pool log sheet are free to use, with no account and nothing to buy.
Where are my readings stored?
In the browser on the phone or computer you type them on (its local storage). They are not sent to us and there is no account. Clearing your browser data deletes them, so print or save the month as a PDF for your records.
Is this the official Florida form?
Chlorlog lays your readings out in the same columns and reading slots as form DH 921 (3/98), Monthly Swimming Pool Report, published by the Florida Department of Health. Rule 64E-9.004(11), F.A.C. allows customized report forms that contain the same information. Chlorlog is not affiliated with or approved by the Department of Health. If you are unsure what your inspector wants to see, ask your county health department.
Can several staff members fill the same log?
Each device keeps its own entries. If two people test the pool, have one person enter the day's readings, or print the month from each device.
Does it work outside Florida?
Yes. The daily pool log sheet records free chlorine, combined chlorine, pH, total alkalinity, cyanuric acid, water temperature and initials, and prints the same way. Our state guides link to the official forms for Georgia, Indiana and Illinois.
Does Chlorlog tell me whether my pool passes inspection?
No. On the Florida log it points out readings outside the ranges in rule 64E-9.004 for the pool type you choose, so they are easy to spot. Whether a pool meets the rules is for your health department to decide.
Start this month's log now
Free, no account. Your readings stay on your phone.