Quick answer
A pool chemical inventory log lists every chemical received and used at a commercial pool, with dates, quantities and approximate amounts on hand. The CDC MAHC expects a chemical inventory log maintained on site. Paired with Safety Data Sheets and a locked, ventilated chemical room, it helps prevent dangerous mix-ups and supports emergency response.
- Log every delivery and every use, with dates and quantities.
- Keep Safety Data Sheets (SDS) for every chemical on site.
- Store acids and chlorine separately — never together.
- Chemical room: locked, ventilated, and off-limits to the public.
What to record
| Field | Example |
|---|---|
| Date | 06/14 |
| Chemical | Sodium hypochlorite 12.5% |
| Received | 4 × 15 gal |
| Used | 15 gal |
| On hand | 45 gal |
| Lot / SDS on file | Lot 2231 · SDS ✓ |
| Initials | JM |
Safe pool chemical storage
- Separate oxidizers (chlorine, cal-hypo) from acids (muriatic, sodium bisulfate).
- Never store liquids above dry chemicals.
- Keep containers closed, labeled and in original packaging.
- Provide ventilation and keep the room locked.
- Keep PPE — goggles, gloves, apron — at the chemical room door.
- Post emergency procedures and keep SDS accessible.
Frequently asked questions
Is a pool chemical inventory log required?
The CDC MAHC calls for a chemical inventory log maintained on site listing chemicals received, used and approximate quantities. Many states adopt similar requirements.
How should pool chemicals be stored?
In a locked, ventilated area with oxidizers and acids separated, containers closed and labeled, and SDS available.
Why track chemical usage?
Usage trends reveal problems — a sudden jump in chlorine use can signal a leak, algae, or a feeder malfunction — and the log supports emergency responders.
This page is an educational summary, not legal advice. Pool and spa codes differ by state and county and change over time — always confirm requirements with the health department that inspects your facility.