Decreasing and Increasing Chlorine Formulas

Proper water chemistry is crucial for safety and health in public water facilities.  The following information regarding decreasing and increasing chlorine should be helpful in maintaining the quality of the water in swimming pools, spas, hot tubs and wading pools in Clark County.  Visit the Indiana State Department of Health's website for this chlorine information packet.


How To Shock a Pool

The "smell of chlorine" in a pool is actually the smell of chloramines, the chemical compounds formed when chlorine combines with sweat, oils, urine and other contaminants in the water. Chloramines are not as effective for disinfecting the water and can cause eye and skin irritation.  Breakpoint Superchlorination or "Pool Shocking" is required to combat the loss of effective chlorine in the water.  The water facility shall be supercholrinated when a combined chlorine concentration of five-tenths (.5) ppm or greater is documented by pool testing.

If you are shocking a pool these guidelines from the Indiana State Department of Health may be of assistance.

Public Water Facility Chemical Log Sheets

Public water facilities are required by 410 IAC-6-2.1 to keep a record of the pool water chemistry.  Please use the attached log sheets for guidance for how often to test and which test should be completed. 



Pool Safety Homepage     Pool Accidents and Injuries     Pool Chemistry     Pool Chlorination     Pool Inspections     Pool De-chlorination
Pool Fecal Accidents     Pool Inspections     Pool Regulations     Pool Shocking Instructions     Pool 9600 Rule

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