ShapeRectangle 2ShapeXXnote2clipboardclockcredit@2xGroupShapeShapeShapeGroup 2GroupHeart - FontAwesomeGroupinstagram@2x (1)magnifying47map-markerGroupphoneShapesocial-pinterest-outlineGroupribbon001-test-tubeShapeShapesocial-youtube-outline

Fact Sheet: Home Swimming Pools

Home  >  Resources  >  Fact Sheets  >  Fact Sheet: Home Swimming Pools
Fact Sheets
Fact Sheet: Animal Quarantine
Fact Sheet: Backflow & Backflow Devices
Fact Sheet: Bed Bugs
Fact Sheet: Bedbug Guidelines for Travelers and Public Accommodation Facility Guests
Fact Sheet: Blue-Green Algae/Cyanobacteria Harmful Algal Bloom (HABs) Physician Reference
Fact Sheet: Bureau for Children with Medical Handicaps
Fact Sheet: Church Festival Food Safety
Fact Sheet: Cleaning up After Flood & Sewer Backups
Fact Sheet: Cockroaches
Fact Sheet: Collector Line Tips
Fact Sheet: Commercial Waste Handling and Good House Keeping
Fact Sheet: Connecting to Sewers
Fact Sheet: Cottage Food Operation
Fact Sheet: Dangers of Extreme Cold
Fact Sheet: Daycare Control Measures for Prevention of Communicable Diseases
Fact Sheet: Emergency Pet Kit
Fact Sheet: Extreme Heat
Fact Sheet: Farm Markets
Fact Sheet: Farmers’ Markets
Fact Sheet: Fight the Bite – Facts About Zika Virus
Fact Sheet: Financial Aid for Sewer Connections and Septic System Replacement
Fact Sheet: Fish Fry Food Safety
Fact Sheet: Flood Safety
Fact Sheet: Flooding in a Food Service Operation
Fact Sheet: Food Safety During Power Outages
Fact Sheet: Food Safety When Eating Out
Fact Sheet: Frozen Pipes
Fact Sheet: Gastroenteritis and Norovirus
Fact Sheet: Gastroenteritis in a Retirement/Assisted Living Facility
Fact Sheet: Get Rid of Roaches
Fact Sheet: Guide to Mosquito Control & Mosquito-borne Illnesses
Fact Sheet: Guidelines For Environmental Cleaning and Disinfection of Norovirus
Fact Sheet: Guidelines for Handling Bed Bugs in a School
Fact Sheet: Guidelines for Social Workers, Home Health Care Nurses, and In Home Visitors
Fact Sheet: Guidelines for the Control of a Suspected or Confirmed Outbreak of Viral Gastroenteritis in a Nursing Home
Fact Sheet: Hamilton County Public Health Flood Fact Sheet
Fact Sheet: Hand Washing
Fact Sheet: Handling Water from Swimming Pools and Hot Tubs
Fact Sheet: Heat
Fact Sheet: Hepatitis A
Fact Sheet: Home Aeration Units – Cavitette
Fact Sheet: Home Aeration Units – Coate Aer
Fact Sheet: Home Aeration Units – JET
Fact Sheet: Home Aeration Units – Multi-Flo
Fact Sheet: Home Aeration Units – Oldham
Fact Sheet: Home Swimming Pools
Fact Sheet: Homeowner’s Plumbing Permit
Fact Sheet: Household Sewage Treatment System Tips
Fact Sheet: Household Sewage Treatment Systems & Power Outages
Fact Sheet: How Germs Spread
Fact Sheet: How to be Safe Around Animals
Fact Sheet: Itch Mites
Fact Sheet: Keeping Food Safe During an Emergency
Fact Sheet: Leachfields
Fact Sheet: Lead Poisoning
Fact Sheet: Lice
Fact Sheet: Methicillin-Resistant Staphylococcus Sureus (MRSA)
Fact Sheet: Mold and Mildew
Fact Sheet: MRSA in a Prison Setting
Fact Sheet: Norovirus in Schools
Fact Sheet: Ohio EPA Semi-Public Sewage Disposal System Inspection Program
Fact Sheet: Privacy Practices, Our Legal Duty
Fact Sheet: Private Water System Testing
Fact Sheet: Rabies & Bats
Fact Sheet: Rodent Control
Fact Sheet: Scrap Tires
Fact Sheet: Septic System Abandonment and Sanitary Sewer Connection
Fact Sheet: Septic Systems – AdvanTex AX20 Treatment System
Fact Sheet: Septic Systems – Septic Tanks
Fact Sheet: Septic Systems – Subsurface Sandfilters
Fact Sheet: Sewage Treatment System Owners
Fact Sheet: Sewer Back-ups
Fact Sheet: Storm Drain Overflow
Fact Sheet: Stormwater Pollution and Yard Waste
Fact Sheet: Sump Pumps
Fact Sheet: Tattoos and Piercings
Fact Sheet: Vacuum Sealing + Hazard Analysis Critical Control Point (HACCP)
Fact Sheet: Waste Disposal
Fact Sheet: Water Heater Permits and Inspections
Fact Sheet: Well Disinfection
Fact Sheet: When Do I Need a Plumbing Permit?
Fact Sheet: Whooping Cough
FOI Requests
Partner & Public Health Research


Home Swimming Pools

Swimming is one of the most popular summer activities in the United States. However, home swimming pools can be dangerous. The following guidelines can be used to keep your pool safe.


Home Pool Injuries

According to the Consumer Product Safety Commission, 49,500 injuries leading to emergency room care are reported annually, and 75% of patients were under the age of 20. There are 330 home pool drownings each year.


Common Waterborne Illness

Illnesses commonly contracted from contact with recreational water are; Cryptosporidium, Giardia, E. coli, Shigella, Norovirus, and Hepatitis A. Operating the pool properly and adequately responding to fecal incidents can help limit the risk of transmission.

Guidelines to prevent water borne illness:

  • Ensure chlorine is present in the swimming pool at all times and check levels often.
  • Ensure the filtration and circulation systems are running continuously.
  • People with diarrhea should be excluded from swimming pools to prevent transmitting gastrointestinal illness.
  • If a fecal accident occurs in the pool, ensure the pool is closed and CDC fecal incident guidelines are followed prior to reopening. Guidelines may be found here:
  • Don’t swallow pool water.
  • Take frequent bathroom breaks (outside of the pool).
  • Wash hands after using the bathroom.
  • Change diapers in the bathroom, not near the pool.
  • Don’t allow pets in the pool or pool area.


My pool smells like chlorine. That means it’s safe to swim, right?

Not necessarily, the smell is of chloramines, a byproduct of the reaction between chlorine and nitrogen or ammonia. Chloramines can irritate the skin, eyes, and mucous membranes. Chlorine in a pool at the proper levels should be near odorless. Free Chlorine levels in pools should be at a minimum of 1 ppm at all times when pools are in operation to allow for proper disinfection.


Disinfection and Water Quality

Maintaining proper chlorine levels allows for disinfection of pool water. There are other factors that limit the effectiveness of chlorine in water. pH should be kept between 7.2 and 7.8 to allow chlorine to be effective. Pools should only be used when the water is clear enough to see the bottom of the pool. Cyanuric acid, which is found in stabilized chlorine tablets, can stop chlorine’s ability to disinfect water when present in concentrations above 70 ppm. Test kits for cyanuric acid are available for purchase where other pool test kits are sold. The only way to lower cyanuric acid levels from a pool is to drain and refill the pool.


Pool Areas

To keep swimmers safe keep the pool area well maintained. Electrical hazards should not be present in pool areas. Pools with single main drains must have a secondary anti-entrapment device.

Pools should have:

  • VGB Compliant drain covers. Follow manufacturer’s guidelines for replacement.
  • 4 feet tall safety fence to prevent unauthorized access. (Fence should not have any gaps larger than 4 inches.)
  • Self-closing and latching gates.

*Check with your local zoning department for additional requirements for swimming pools and their surrounding areas.


Chemical Safety

The most commonly used chemical disinfectant in swimming pools is chlorine. Chlorine disinfects harmful pathogens, but can be dangerous in its concentrated form. A few safety guidelines can be followed to minimize risk when working with chlorine and other pool chemicals.

  • Don’t mix chlorine with other pool chemicals.
  • Keep pool chemicals locked and out of reach children.
  • Chlorine tablets should be used in a chlorinator, not in the skimmer baskets where children have access.
  • Wear proper protective equipment when working with chlorine (gloves, mask, goggles, etc.).
  • Follow all instructions on the label.


Injury Prevention

  • Don’t swim alone.
  • Make sure children are capable swimmers and are supervised at all times.
  • Take CPR and first aid classes.
  • Keep kids away from drain covers and outlets pipes.
  • Ensure sunscreen is applied to prevent sunburn.
  • Keep glass bottles away from pool areas.
  • Don’t dive into shallow water.
  • Have the following items available.
    1.  A flotation device and / or shepherd’s crook.
    2.  A Phone to call 911.
    3.  A first aid kit containing bandages, gloves, and scissors to cut hair or clothing.


What to do with water at the end of the season

To limit nuisance issues and impacts to local watersheds, rules must be followed for draining pools. Water must be tested for pH and chlorine prior to dumping and may not be dumped on other properties. For additional information about what to do with leftover pool water, contact the Water Quality Division at (513) 946-7966.


Ideal pool chemical readings

Free Chlorine 2.0 – 4.0 ppm
Combined Chlorine None
Total Alkalinity 80 – 120 ppm
pH 7.4-7.6
Cyanuric Acide 30 – 50 ppm



Balancing Pool Chemicals


To raise Chlorine (1ppm/10,000 gal of pool water): add 2 oz Calcium Hypochlorite (65%); add 10.7 fl oz Sodium Hypochlorite (12%)
To neutralize excess chlorine (1ppm/10,000 gal of pool water): add 1 oz Sodium Thiosulfate-carefully, or more chlorine will be required to offset the extra neutralizer

To RAISE pH (.2 units/10,000 gal of pool waterbased upon BASE demand test/ Alkalinity): add 6 oz of Sodium Carbonate (Soda Ash)
To LOWER pH (.2 units/10,000 gal of pool water, based upon ACID demand test/ Alkalinity): add 12 oz Muriatic acid or 1.0 lb. Sodium Bisulfate.

To RAISE Alkalinity (10 ppm/10,000 gal of pool water): add approx. 1.5 lbs. Sodium Bicarbonate (Baking Soda)
To LOWER Alkalinity (10 ppm/10,000 gal of pool water): add 26 oz Muriatic acid or 2.15 lbs. Sodium Bisulfate




Hamilton County Public Health does not license or regulate home pools but, we do offer guidance. If you are interested in more information please contact Hamilton County Public Health at (513) 946-7800.


Download a printable version of this fact sheet here.


250 William Howard Taft Road
2nd Floor, Cincinnati, OH 45219
Phone 513.946.7800 Fax 513.946.7890