TL;DR: While drinking small amounts of diluted pool water usually only causes mild stomach upset, large ingestions or exposure to concentrated chemicals can be dangerous. Contact a vet immediately if your dog shows signs of persistent vomiting, lethargy, or respiratory distress.
What happens when my dog drinks pool water?
When a dog drinks chemically treated pool water, they are ingesting a mixture of water and maintenance chemicals like chlorine, bromine, algaecides, and pH balancers. In most residential pools, these chemicals are highly diluted, which typically results in mild stomach upset rather than severe poisoning. However, the risk increases significantly if the dog consumes concentrated chemicals directly or if the pool was recently shocked.
Is it an emergency if my dog drinks pool water?
- The urgency level for this situation is generally Medium; while minor laps of water may only cause irritation, close monitoring is required.
- Seek immediate veterinary care if your dog is vomiting persistently, appears lethargic, or has pale gums.
- Contact an emergency clinic immediately if your dog shows signs of respiratory distress.
- Be aware that large ingestions can lead to severe complications like salt poisoning or chemical burns in the esophagus.
Why should I take a photo of the pool chemicals or my dog's vomit?
- Take photos of the chemical containers used to treat the pool so the veterinary team can identify exact active ingredients and concentrations.
- Photograph any vomit to provide vital clues about the severity of the chemical exposure.
- Capture a photo of the pool's current condition, especially if it appears cloudy or was recently shocked.
Clinical Context (Merck Veterinary Manual)
Exposure to chemically treated pool water, which often contains hypochlorite solutions, can occur when dogs drink from recently treated pools. The hazard depends on hypochlorite concentration and pH; concentrations <10% are mild irritants unless pH is >11 or <3.5, which can cause corrosive injury. Oral exposure contraindicates emesis and activated charcoal; instead, dilution with milk or water is recommended. Monitor for GI irritation/ulceration and manage spontaneous vomiting. Respiratory exposure requires moving the animal to fresh air and monitoring for dyspnea, with stabilization a priority for severely dyspneic animals.
Chapter: Toxicology, Emergency
Source: The Merck Veterinary Manual, 11th Edition (Page 3001)