Hot tubs are relaxing, enjoyable, and often one of the best parts of a vacation rental, hotel stay, cabin trip, or backyard setup. However, hot tubs also need proper maintenance to stay clean and safe. Warm water, heavy use, poor chemical balance, weak filtration, and poor maintenance can create conditions where germs, skin irritation, strong odors, cloudy water, or other health concerns become more likely.
The CDC explains that germs can spread through hot tub water and may cause respiratory, skin, or gastrointestinal illnesses when people swallow contaminated water, have contact with it, or breathe in mist or aerosols from contaminated water. This is why hot tub users should pay attention to water clarity, disinfectant levels, pH, temperature, odor, rules, and general cleanliness before getting in.
This matters at home, but it matters even more when traveling. At an Airbnb, VRBO, hotel, resort, gym, cabin, or vacation rental, you may not know how often the hot tub is tested, cleaned, drained, filtered, or serviced. A few simple checks before using a travel hot tub can help protect you, your family, and your trip.
1. Understand Why Hot Tubs Need Extra Attention
Hot tubs are different from pools because the water is warmer and the water volume is much smaller. This means sanitizer can be used up faster, especially when several people use the spa in a short period of time.
- Warm water can make hot tubs more vulnerable to poor sanitation if chemicals are not maintained.
- Small water volume means contaminants can build up faster than in a large pool.
- Heavy use can quickly reduce sanitizer levels.
- Jets and bubbles can create mist that users breathe while soaking.
Solution: Treat hot tub water quality as seriously as pool water quality. Clean, clear water with proper sanitizer and pH is not optional. If the water looks, smells, or feels wrong, do not use the hot tub.
2. Check Water Clarity Before Getting In
Clear water is not a guarantee that everything is perfect, but cloudy, foamy, slimy, or dirty water is a warning sign. You should be able to see the spa seats, floor, and drains clearly.
- Cloudy water may indicate poor filtration, low sanitizer, high pH, or heavy contamination.
- Foamy water may be caused by soaps, lotions, oils, or water imbalance.
- Slimy surfaces may indicate biofilm or poor cleaning.
- Debris in the water can point to poor maintenance or a damaged cover.
Solution: Do a quick visual check before entering. If the water is cloudy, foamy, slimy, discolored, or has floating debris, skip the soak and ask the owner, host, or operator to service the spa.
3. Use Test Strips When Traveling
When using a hot tub away from home, especially at a vacation rental, it is smart to bring a small bottle of pool and spa test strips. Test strips can help you check sanitizer and pH before getting in.
- Test strips are easy to pack and take only seconds to use.
- They can check chlorine or bromine depending on the strip type.
- They can show whether pH is too high or too low.
- They give you more confidence before using an unfamiliar hot tub.
Solution: Keep test strips in your travel bag if your rental, hotel, or cabin includes a hot tub. Test before soaking, especially if the spa is shared, heavily used, or you are unsure when it was last serviced.
4. Know The Basic Hot Tub Test Ranges
A hot tub should have enough sanitizer to help control germs, and the pH should be within a comfortable and effective range. The CDC recommends checking chlorine or bromine and pH with test strips before using a hot tub.
- Chlorine should be at least 3 ppm in hot tubs.
- Bromine should generally be 4–8 ppm.
- pH should generally be 7.0–7.8.
- Very high sanitizer readings should be discussed with the host, owner, or operator before use.
Solution: If the sanitizer is too low, the pH is outside the proper range, or the readings seem extreme, do not use the hot tub until the water is corrected and retested.
5. Do Not Trust A Strong Chemical Smell
Many people assume a strong chemical smell means the hot tub is extra clean. That is not always true. A properly maintained hot tub should not have an overpowering chemical odor.
- Strong odors can indicate a water quality problem.
- Poor balance can make the water uncomfortable.
- Heavy use can create combined chemical odors.
- A clean hot tub should smell mild, not harsh or overwhelming.
Solution: If the hot tub smells strongly of chemicals, do not assume it is safe. Test the water and ask the owner, host, or operator when the spa was last serviced.
6. Avoid Swallowing Hot Tub Water
Hot tub water should never be swallowed. Even water that looks clean can contain germs or chemical levels that are not meant to be ingested.
- Children may swallow water accidentally while playing.
- Jets and bubbles can splash water toward the face.
- Shared spas can have higher contamination risk if not maintained well.
- Swallowing contaminated water can increase the chance of stomach illness.
Solution: Keep hot tub water out of your mouth. Remind children not to splash, drink, or put their faces near the jet stream.
7. Stay Out If You Are Sick
If someone is sick, especially with diarrhea, they should not use the hot tub. This helps protect other users and prevents germs from spreading through the water.
- Diarrhea illness can spread germs through recreational water.
- Open wounds or irritated skin may become more irritated in poorly maintained water.
- Coughing or respiratory illness may be worsened by steam or aerosols in some situations.
- Shared hot tubs require extra consideration for other guests.
Solution: Do not use a hot tub if you are sick with diarrhea, have a contagious illness, or have concerns about skin irritation or open wounds. Wait until you are well before soaking.
8. Shower Before Using The Hot Tub
A quick shower before using the hot tub helps remove sweat, body oils, lotions, deodorant, cosmetics, dirt, and other contaminants from your skin. This helps the sanitizer work better and keeps the water cleaner for everyone.
- Body oils and lotions can use up sanitizer faster.
- Cosmetics and hair products can contribute to foam and cloudy water.
- Sweat and dirt increase the water care load.
- Cleaner bathers help keep the hot tub cleaner longer.
Solution: Shower before soaking, especially in vacation rentals, hotels, gyms, resorts, or shared hot tubs where many users may enter the water throughout the day.
9. Keep Young Children Out Of Hot Tubs
Hot tubs are not the same as pools. The warmer water can be too much for young children, and the CDC advises that children under 5 should not use hot tubs.
- Young children can overheat faster than adults.
- Children may not communicate discomfort quickly.
- Splashing and play can increase the chance of swallowing water.
- Hot tub depth and seating may not be safe for small children.
Solution: Keep children under 5 out of hot tubs. For older children, limit time, keep temperatures lower, supervise closely, and make sure they do not swallow the water.
10. Avoid Alcohol Before Or During Hot Tub Use
Alcohol and hot tubs are a risky combination. Alcohol can affect judgment, hydration, balance, alertness, and the ability to respond to overheating or dizziness.
- Alcohol can increase dehydration during a hot soak.
- It can reduce balance when entering or exiting the spa.
- It can make users sleepy or less aware of discomfort.
- Hot water may intensify these risks.
Solution: Avoid alcohol before and during hot tub use. Drink water instead, especially when traveling, soaking at night, or using an unfamiliar spa.
11. Check The Temperature Before Soaking
Hot tub water should not be too hot. Water that is above a safe temperature can increase the risk of overheating, dizziness, dehydration, and discomfort.
- Hot tub temperature should not be higher than 104°F.
- Rental hot tub displays may not always be accurate.
- Children, seniors, and pregnant users may need extra caution.
- Long soaks can increase overheating risk even at normal temperatures.
Solution: Check the water temperature before entering. If it feels too hot, do not get in. If you are pregnant or have a medical condition, talk to a healthcare provider before using a hot tub.
12. Ask Airbnb, VRBO, And Rental Hosts About Hot Tub Care
Vacation rental hot tubs can be wonderful, but they may be used by many guests back-to-back. Before using one, it is reasonable to ask how the spa is cleaned, tested, and maintained between stays.
- Ask when the hot tub was last drained or serviced.
- Ask whether sanitizer and pH are checked between guests.
- Ask where test strips or maintenance instructions are kept.
- Report cloudy water, strong odor, foam, low sanitizer, or unsafe temperature.
Solution: Message the host before or shortly after arrival if you plan to use the hot tub. A good host should be able to explain the maintenance routine or send someone to check the spa if there is a concern.
13. Be Extra Careful With Shared Public Hot Tubs
Hotel, gym, resort, apartment, HOA, and community hot tubs may be used by many people throughout the day. These spas require careful operation and frequent testing.
- High bather loads can use up sanitizer quickly.
- Weekend use may be heavier than weekday use.
- Public spas should be tested regularly by trained staff.
- Inspection results may be available through the property or local health department.
Solution: Before using a shared public hot tub, look at the water, smell the area, check posted rules, and ask staff how often sanitizer and pH are tested. If something looks wrong, skip it.
14. Know When To Skip The Hot Tub Entirely
Sometimes the safest choice is not to use the hot tub. This is especially true when water quality is questionable or the spa appears poorly maintained.
- Skip the spa if the water is cloudy, foamy, slimy, or dirty.
- Skip it if the sanitizer level is too low or pH is out of range.
- Skip it if the water smells extremely strong or unpleasant.
- Skip it if the temperature is too high or the controls appear unsafe.
- Skip it if you are sick, overheated, dizzy, or unsure whether the water is safe.
Solution: Do not let the excitement of a vacation hot tub override common sense. If the water does not pass the basic look, smell, test, and temperature checks, do not get in.
What To Pack If Your Vacation Rental Has A Hot Tub
If your Airbnb, VRBO, cabin, hotel, or resort stay includes a hot tub, a few small items can help you make better decisions before soaking.
- Pool and spa test strips for chlorine, bromine, and pH.
- A small waterproof thermometer if you want to confirm water temperature.
- A refillable water bottle to stay hydrated.
- Sandals or water shoes for safer entry and exit.
- A towel or robe so you do not rush when getting out.
These items are small, inexpensive, and easy to pack, but they can help you avoid using a hot tub that is not properly maintained.
Key Takeaways
- Hot tub water can spread germs if it is not maintained properly. Users may be exposed by swallowing water, touching contaminated water, or breathing mist from contaminated water.
- Test unfamiliar hot tubs before using them. Bring test strips when traveling to an Airbnb, VRBO, hotel, cabin, or vacation rental with a spa.
- Do not rely on appearance alone. Clear water helps, but sanitizer, pH, odor, temperature, and surface condition also matter.
- Avoid risky hot tub behavior. Do not swallow water, do not use the spa when sick with diarrhea, shower before soaking, avoid alcohol, and keep children under 5 out of hot tubs.
- Ask rental hosts and operators questions. Find out when the hot tub was last serviced and whether sanitizer and pH are checked between guests or during heavy use.
Hot tubs can be a great part of a vacation or a relaxing part of life at home, but they need clean, properly balanced water to be enjoyable and safer to use. Before entering any hot tub, check the water clarity, smell, temperature, sanitizer, pH, and general condition of the spa.
When traveling to an Airbnb, VRBO, cabin, hotel, or resort, take extra care because you may not know how the hot tub was maintained before you arrived. Bring test strips, ask the host or operator about recent service, and skip the spa if anything looks questionable. A missed soak is better than a ruined trip.