101 Statistics about Inground
Interested in learning more about Inground Swimming Pools? We know finding facts and figures about Swimming Pools can be time-consuming and frustrating, so we put together this list of the top 101 facts, notes, and statistics so you can easily reference them and refer back to them any time in the future. This space is constantly changing and evolving, so if you see a fact that is not up-to-date, feel free to let us know. And if you know a stat that we should add, let us know that too!!
1. Swimming is the fifth most popular activity in the U.S.
According to their findings, about 18% of people aged 15 years and older engaged in exercise activities on a given day. About 30% of them walked, so this was the most popular activity. Besides walking, weight lifting and using cardiovascular equipment were among the top three most popular exercise activities. Swimming was in fifth place together with surfing and water skiing, since more than 7% opted for one of these sports.
2. 17.12% of Americans between the ages of 18 and 29 own a hot tub, pool, or spa.
Swimming pool owner demographics show that this age group owned the most pools, spas, and hot tubs. Of those aged between 30 and 49, 16.19% owned these, and of those aged between 50 and 64, that percentage was 12.97%.
3. Swimming is the number-one activity among kids and teens in the U.S.
Based on the swimming pool stats, about 36% of children and teens aged between 7 and 17 swim at least six times a year, compared to 15% of adults.
4. There are 10.4 million residential swimming pools in the U.S.
These are either in rented homes or homes that are owned by their residents. In addition, based on the pool and spa industry statistics collected by the Association of Pool & Spa Professionals (APSP), there are 309,000 public swimming pools in the US. By looking at these figures, we can assume that Americans love swimming, which residential swimming pool statistics clearly confirm.
5. California and Florida have the most inground swimming pools in the United States.
In the United States, there are around five million inground swimming pools. Of these, around 40% are in either Florida or California.
6. The annual revenue of the swimming pool industry amounts to $1.1 billion.
In the US, swimming statistics show that the market size of this industry is growing. To be precise, from 2015 to 2020, the annual growth rate has been 1.6%.
7. People who are shopping for pools are mostly concerned with the price.
To be precise, 46% of customers mostly worry about the price when considering installing a swimming pool at home, statistics in the US show. Curb appeal is the greatest concern for about 16% of customers. That’s followed by hydrotherapy features (7%) and LED lighting (7%).
8. On average, an in-ground swimming pool is about 3.5 times more expensive than an above-ground swimming pool.
On average, an in-ground pool (32 x 16 feet) costs $21,919, while an above-ground swimming pool costs $6,243 (19 feet in diameter.
9. About 41% of customers spend $5,000–$7,000 on their new hot tub.
According to the swimming pool statistics in America, about 21% of customers spend $4,000–$5,000 on a hot tub, while 10% choose products that cost $3,000–$4,000. In 2016, about two-thirds of portable spa retailers reported that they saw an increase in sales.
10. On average, you need about $87.50 a month for pool chemicals, according to pool ownership statistics.
Maintaining an adequate level of pool chemicals is essential for keeping your pool clean and safe for your health. When talking about the costs, Americans collectively spend about $1 million every hour on swimming pool construction, maintenance, and cleaning. Considering this fact, it seems that the percentage of homes with swimming pools is on a steady rise.
11. The average cost of a solar pool heating system is between $3,000 and $4,000.
Harnessing solar energy to heat your pool can help you save a considerable amount of money. A typical payback period is 1.5 to 7 years. However, this will depend on a number of factors, including your local fuel costs. Also, gas pool heaters usually don’t last as long as solar pool heaters, which is another benefit of this renewable energy source.
12. An Olympic-sized pool is 50 meters long and 25 meters wide.
Olympic-sized pools are 2 meters deep, so they can hold about 660,000 gallons of water. Considering that a standard bathtub can hold about 80 gallons of water, in an Olympic swimming pool, there’s enough water for 8,250 bathtubs.
13. One of the world's largest swimming pools is the Citystars Lagoon in Sharm el-Sheikh, Egypt.
The previous holder of this record was a swimming pool in Algarrobo, Chile. The San Alfonso del Mar resort offers guests a swim in a 19.77-acre swimming pool, which holds about 66 million gallons of water. It’s located along the coastline and is filled with seawater.
14. About 17% of people urinate while swimming in the pool.
What makes this fact especially surprising (and disgusting) is that this figure includes adults. In addition, 35% of people don’t take a shower before getting into the pool.
15. In Australia, Queensland has the highest percentage of homes with swimming pools.
According to the swimming pool statistics from Australia, in 2018, about 20% of homeowners in Queensland had a swimming pool. On the other hand, only 3% of homes in Tasmania had this amazing feature.
16. The oldest known pool dates back to the third millennium BC.
The oldest pool in the world is the Great Bath in Mohenjo-Daro, Pakistan. It’s located in the ancient Indus Valley, and it’s made of brick with a layer of bitumen. This ancient pool is 38.9 by 23 feet, and it’s 7.9 feet deep.
17. There are around 390 spa or swimming pool deaths per year in the USA.
The average number of deaths per year due to drowning or pool accidents is terrifying, especially when it comes to children drowning.
18. In the US, about 82% of drownings among children occur in home pools.
Even though these swimming pool accidents statistics are devastating, the good news is that we can prevent most of these incidents. For example, four-sided fencing is very effective in preventing drowning deaths among children. In fact, it can reduce the drowning death rate among young kids by 75%. Therefore, it’s crucial to make your swimming pool safe for kids.
19. Every hour, 42 people drown around the world.
Drowning is among the leading causes of death in all regions of the world. Every year, about 372,000 people lose their lives to drowning, swimming pool death statistics indicate.
20. In 2008, about 4,600 Americans visited an emergency room due to injuries associated with pool chemicals.
Most of them experienced poisoning symptoms, dermatitis, or conjunctivitis. Over 50% of the injuries happened in home pools.
21. Free chlorine can kill Escherichia coli in less than a minute.
However, when talking about swimming pool safety, some germs, especially viruses and parasites, are more tolerant to chlorine. For example, it takes about 16 minutes for chlorine to kill hepatitis A and 45 minutes to kill giardia. Cryptosporidium is probably the most resilient, as it can survive up to 10 days.
22. Over 12% of pools were closed after a routine inspection in 2008.
They were closed due to serious violations that caused a threat to public health and safety. In addition, these routine pool inspections determined that the level of pool disinfectants used wasn’t satisfactory in about 10.7% of pools.
23. Water-based exercise has a positive effect on pregnant women’s health.
It also improves the health of their unborn children, according to swimming pool interesting facts. What’s more, research shows that swimming and water-based exercise are very beneficial for people with fibromyalgia since they can decrease anxiety and depression.
24. Hydrotherapy is the most effective activity for rheumatoid arthritis.
One of the swimming pool fun facts is that it can help treat serious health conditions. Besides helping people with rheumatoid arthritis, water-based exercise is also beneficial for people with osteoarthritis. It alleviates pain and improves the use of affected joints.
25. In the US, most unintentional injury deaths among children aged 1–4 years are caused by drowning.
In addition, children aged 5–9 years are also at high risk of drowning, which is the second leading cause of unintentional injury deaths among this age group in the US. These grim swimming pool drowning statistics also show that about 60% of fatal drownings of young children (4 years or younger) happen in swimming pools. The bottom line is that we should never leave children close to the water without adult supervision.
26. Pool water is no different from tap water.
Most pool water is quite sanitary, being filtered daily, with balanced chemistry with very few chemicals used. Your pool water may be safer to drink than your tap water.
27. There are more vinyl liner pools than any other pool type.
Since there are 3.5 million above-ground pools – almost all of which are vinyl lined – and about a third of the 5 million in-ground pools are vinyl, it is the most common swimming pool surface in the United States.
28. The largest backyard pool in the United States is in Texas.
Just south of Houston in El Campo, Over 600,000 gallons and over 3 acres in size, this is the largest backyard pool in the world. Mike Mobley built this pool to be the biggest in the world, and with a 500 foot lazy river, 21 ft slide and 6 waterfalls.
29. There are more swimming pools in the US than stories in NYC.
There may be 8 million stories in the naked city, but there’s 8.5 million pools in the US, and only 8.4 million people in New York City, which paradoxically is an area with a very low number of swimming pools per 100,000 residents. New York City; one of the largest cities in the world, is a veritable swimming pool desert.
30. President Gerald Ford installed the White House Swimming Pool in 1975.
After leaving his home pool in Alexandria and living in the Vice President’s quarters, the recently sworn in President wasted no time in constructing an outdoor inground pool on the White House lawn. A tunnel passage allows the First Family to reach the pool area without being seen by nosy reporters or spies.
31. The Titanic was the first Ocean Liner to have a swimming pool.
The pool was only 10×20′ and filled with cold North Atlantic sea water, but to the serious exercise enthusiast with a long voyage and time to kill, it was a real boon.
32. 95% of pool owners use chlorine in their pools.
And the halogen chlorine has remained king for all these years, although many people (12%) are now making their own chlorine with salt water pools. Ozonators, Mineral Purifiers and UV Systems are solidly accepted supplemental sanitation methods, but in most pools, some chlorine is still used at certain times. 5% of US pool owners use natural methods or biguanide sanitizers, the only known chlorine substitute.
33. Swimming burns more calories than most other forms of exercise.
If you swim steady, you can burn up to 850 calories per hour in the swimming pool, and active water aerobics is another calorie burner that gets the blood and oxygen moving through the body. Plus, the low impact water workout targets all major muscle groups, and most of the small groups, too! Swimming or water exercise also has many other benefits besides keeping fit.
34. Gunite pools use a rebar framework that is sprayed over with a concrete and sand mixture.
Gunite is exceedingly durable, so swimming pools made of this substance are built to last.
35. Fiberglass pools come in almost any size and shape imaginable. They are molded pools that are installed in your yard in one piece.
Like gunite pools, fiberglass pools can be heated to extend the swimming season and can be installed with fiber optic lights for night swimming.
36. A vinyl liner pool has a custom made sheet of vinyl between the water and the pool structure.
Vinyl liners typically lock their top edge, called a bead, into a track located on the bottom of the coping, which is at deck level.
37. Vinyl liner pools generally last about 35 years, while concrete and fiberglass pools can last 50 years or more.
38. Fiberglass pools require the least maintenance of all inground pool types.
39. Concrete pools require the most maintenance and are the most expensive to maintain.
40. Plaster is the cheapest concrete pool finish, while tile is the most expensive.
41. Vinyl liner pools are the cheapest inground pool type to build but are not the cheapest to maintain.
42. Concrete pools are the most algae prone, while fiberglass pools are algae resistant.
43. On average, Fiberglass pools take about 2 to 4 weeks to install, vinyl liner pools take 4 to 8 weeks to install, and concrete pools take around 3 to 6 months to build.
44. You can customize the size and shape of a concrete or vinyl liner pool, but you can't customize the size and shape of a fiberglass pool.
45. Fiberglass pools typically aren't much larger than 16x40 ft.
46. The oldest known swimming pool is in Pakistan.
The world’s oldest known swimming pool is The Great Bath, located in Mohenjo-Daro, Pakistan. Situated amongst the ruins of the ancient Indus Valley Civilization, this pool is estimated to date all the way back to the 3rd millennium BC.
47. An Olympic-sized pool can hold up to 850,000 gallons of water.
Olympic-sized pools are always 50 meters long, but they can have widths of either 25 yards or 25 meters. That’s enough water to fill more than 9,400 bathtubs.
48. Half of Americans can’t swim or perform basic safety skills.
According to a survey conducted by the Red Cross, more than 50% of Americans either can’t swim or don’t contain basic “water competency” skills. With eight out of 10 Americans planning to swim in the pool or beach this summer, enrolling your children in swim lessons or safety courses becomes critical.
49. The largest swimming pool in the world is in Chile.
In Algarroba, Chile, the San Alfonso del Mar resort is home to the world’s largest swimming pool. A Guinness Book of World Records holder, the pool has an area of 19.77 acres and can hold 66 million gallons of water.
50. Modern-day swimming pools became popular in Britain in the mid-1800s.
By 1837 there were six indoor pools in London, complete with diving boards. The Maidstone Swimming Club in Maidstone, Kent, was possibly the first swim club, created in 1844. Its founding was meant to teach people to swim to combat the number of drownings in the River Medway, including rescuers who couldn’t swim. The club held races, diving competitions and water polo matches in the river.
51. The RMS Olympic, known as a sister ship to the Titanic, was the first ocean liner to have a heated swimming pool on board.
The 30-foot pool was only available to first-class passengers. It set sail the year before the Titanic did. The Titanic had a similar heated pool on board.
52. A dedicated filtration system for swimming pools was invented in 1910 at Brown University, using chlorine.
By then public drinking water was being sanitized with chlorination and sand filtration, and the same concept was applied to swimming pools.
53. The White House has two swimming pools: an indoor pool and an outdoor pool.
The indoor pool was built in 1933 for Franklin D. Roosevelt. Its construction was made possible by a fundraising campaign led by the New York Daily News so the president, who suffered from polio could continue his water therapy during his terms. Gerald Ford, who was an avid swimmer and had a pool at his home in Alexandria, made the construction of an outdoor pool one of his first orders as president in 1975. It rests on the White House lawn, and is accessible by a tunnel passage so the president and family can access it without being seen by the media, the public, or by spies.
54. As of 2015, the United States has an estimated 5.14 million residential inground pools, 3,394,565 above ground pools, and 243,499 public pools nationwide, according to the Association of Pool and Spa Professionals.
There are also 5,639,264 hot tubs in the United States.
55. California ranks at the top with the most swimming pools in the country, at 1,233,611 inground residential pools, 335,988 above ground pools and 40,536 commercial pools.
It also ranks at number one with 1,197,471 hot tubs. Florida ranks second in number of inground residential pools at 1,027,846, while Texas comes in third at 397,793.
56. The deepest indoor pool is Nemo 33, in Brussels.
It’s 113 feet deep, but maintained at 86 degrees for comfort, so divers can swim without worry about hypothermia.
57. The first heated swimming pool was built by Gaius Maecenas of Rome, a friend to Caesar Augustus, the first emperor of Rome.
58. The first swimming club was the Maidstone Swimming Club.
It was established in Kent, England in response to people drowning in the River Medway.
59. Swimming has been part of the Olympic Games since 1896.
60. The turbo pump on the space shuttle’s main engines are so powerful they could drain an average swimming pool in 25 seconds.
61. Australia builds more domestic swimming pools (per capita) than any other country in the world.
62. Swimming is what Australians do best.
Most Olympic medals of Australia come from swimmers: Ian Thorpe with 9 medals and Leisel Jones with 9 medals.
63. The most popular swimming pool game is Marco Polo.
Coming in at a close second is Sharks and Minnows. No one is sure who invented Marco Polo, but the game came about in the 1960s and has stayed, sometimes being called “Mermaid on the Rocks” or “Alligator.” It’s still the most popular game to play in a swimming pool after 60 years.
64. Benjamin Franklin invented swim fins at the young age of 11.
65. Women weren’t allowed to participate in Olympic Swimming until 1912.
Only the “freestyle”, “breast stroke”, and “backstroke” styles were present.
66. Since the end of the recession years in 2009, the growth of the in-ground pool industry has been 13%.
Construction figures have still not returned to levels seen in 1991. The last time the industry was at the current level of construction (61,000 pools per year) was 1982.
67. 48% of SOI hot tub retailers reported that they sold swim spas in 2016, with 59% reporting they did so in 2017.
68. 46% of customers shopping for pools or spas in the United States are concerned about the price the most.
That’s followed by curb appeal (16), hydrotherapy options (7%), and LED lights (7%).
69. 76% of pool and spa retailers sell portable spas, with two out of three saying that their sales increased in 2016.
That was an 8% increase over figures reported from the year before.
70. There have been at least 80 recreational water-associated outbreaks of disease transmission in the United States, affecting over 1,300 people because of their use of pools or spas.
71. 36% of kids between the ages of 7 to 17 report that they go swimming at least six times per year.
15% of adults fall into this category of frequency as well.
72. 47% of the swimming pools currently used in the United States are above-ground pools.
73. 35% of people jump into a swimming pool without showering first, while another 17% of people (including adults) admit that they urinate in the pool while they swim.
74. The monthly cost for pool chemicals to maintain appropriate clean water levels for residential pools is $87.50.
75. 38% of the in-ground swimming pools in the U.S. have at least one diving board.
76. The Deep Eddy swimming pool in Austin, Texas is the first recorded concrete pool.
First established as a swimming hole in 1915, you can still visit theDeep Eddy today.
77. The Library Resort’s Blood-Red Pool in Koh Samui, Thailand is as red as you might expect from its name.
The color comes not from anything done to the water itself, but from the red, orange, and yellow mosaic tiles used in the pool.
78. 38% of pools have diving boards making it one of the most popular pool additions.
79. In the United States during 2009, there were approximately 301 million swimming visits each year by persons over the age of six.
80. About 91 million people over the age of 16 swim in oceans, lakes, and rivers each year in the United States.
81. More than 1 in 10 (10.7% or 12,917 of 120,975) routine pool inspections identified pool disinfectant level violations.
Chlorine and other pool disinfectants are the primary barrier to the spread of germs in the water in which we swim.
82. Almost 1 in 8 (12.1% or 13,532 of 111,487) routine pool inspections conducted during 2008 identified serious violations that threatened public health and safety and resulted in an immediate closure.
83. A total of 81 recreational water–associated outbreaks affecting at least 1,326 persons were reported to CDC for 2009-2010.
84. Cryptosporidium (or Crypto) is an extremely chlorine-tolerant parasite that can survive in a properly chlorinated pool for 3.5–10.6 days.
85. Of 49 recreational water–associated outbreaks of gastroenteritis during 2009-2010, 55% were caused by Crypto.
86. Of 57 gastroenteritis outbreaks associated with treated (for example, chlorinated) recreational water venues, 84% were caused by Crypto.
87. More than 1 in 5 (21.6%) of American adults do not know swimming while ill with diarrhea can heavily contaminate water in which we swim and make other swimmers sick.
88. Pool Filters have been around for more than 105 years.
Pool filters have been around almost as long as swimming pools have been. A pool filter allows you to reuse the water in your pool, rather than having to constantly reapply fresh water. Before that, swimming pool water wasn’t the cleanest.
89. NYC has a very low swimming pool ownership rate.
This could be because of the cold winters the state gets every year.
90. The average person produces 25,000 quarts of saliva throughout their lifetime, which is enough to fill two swimming pools.
91. Aquatic therapy is useful to patients with arthritis, healing fractured bones, or who are overweight.
The buoyancy of the water assists in supporting the weight of an individual and reduces the force of stress placed on the joints. Making it easier and less painful to perform aquatic exercises due to its low impact.
92. Parents can take their babies to swimming lessons as early as 6 months old.
93. According to Statista 2018, ages 18-29 led the share of Americans who own a pool, hot tub, or spa at 17.2%.
94. All in all, most people spend $45,000–$85,000 when they buy a fiberglass pool.
95. A concrete pool will cost an average of $27,400 to maintain over a 10-year period.
96. Depending on the size and shape of the pool, a concrete pool typically runs anywhere from $50,000 to $100,000.
97. A vinyl liner pool can cost around $20,000 if you decide to do it yourself.
It may cost anywhere from $35,000 to $65,000 when you hire a professional to do it for you.
98. The largest swimming pool in the U.S. was the Fleishhacker Pool in San Francisco, but it closed in 1971.
99. The most swimming pools in a resort is 643, achieved by the Lexis Hibiscus Port Dickson (Malaysia), as verified in research published on 14 October 2016.
100. Home swimming pools became popular after World War II, when Hollywood movies from synchronized swimming star Esther Williams made them more desirable.
101. Synchronized swimming was popularized by actress Esther Williams in her “aqua musicals” of the 1940s and 1950s.
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