Airborne Chloramine Potential

Airborne Chloramine Potential



Hours of Operation


Personal Hygiene Rules


(showering decreases potential)

Street shoes permitted on pool deck

(increased organic matter increases potential)

Chemicals used for washing pool deck

(interaction with oxidized water may increase potential)


(standing water increases potential)

Pool Design

Gutter design

(water surface below the deck level increases the potential)


Reaction Surface Area to air volume ratio



Gallons of Water

Surface Area

(larger surface area, the greater the oxygen exchange, increase potential)

Source/Quality of Fresh Water

Type of Disinfection

(inorganic chloramine treated water raises combined chlorine levels)


Date of last material change (increase potential for years greater than 3 years)

Use of zeolite (decrease the potential)


Backwash Frequency

once a week (< increase potential)

% water replacement (10%<increase potential)


Type of Primary Water Disinfection


(does not produce chloramines decreasing potential)

Cl in liquid state

(increase potential)

Cl in gaseous state

(more effective decreasing potential)


(worse effect effect Bromines increasing potential)



Type of Secondary Water Disinfection/Sterilization

(low pressure UV is “supposed” to reduce monochloramines decreasing potential)

(Medium pressure UV is “supposed” to reduce di+trichloramines decreasing potential)


Free Cl

(1.0-3.0 ppm = acceptable)

(Levels higher or lower effects combined chlorine increasing the potential)



(Levels higher or lower effects oxidation effectiveness with halons increasing the potential)

Combined Cl

(< .5 ppm)

(Levels higher increase the potential)


Ammonia Level

(>.25 ppm increase potential)


Nitrate Level

(>.1 increase potential)


Date of Water Fill

(<than 365 days = acceptable)

(older water increases the potential)


Bather Load

(ratio of total gallons/bathers 1 pt urea/bather)

(higher load =greater potential)


Date of Breakpoint

(< 7 days = acceptable)

(proper breakpoint intervals decreases potential)



Air Volume


air temperature

water temperature

(2 degree variation = acceptable)

(greater variation increases potential)


Relative Humidity

(50-60 percent = acceptable)

(higher RH increases potential)


# Air Exchanges/Hour (optimum is 8)

(greater number of exchanges decreases potential)


%Fresh Air

(80% = acceptable)

(lower percentage increases potential; higher percentage decreases potential)


Air Filtration

(use of activated carbon filters decreases the potential)


Types of aeration


Water park

(spray features increase the potential)


Swim Team Practice

(practices longer than 45 minutes increase the potential)

Swim Team Meets

(warm up periods increase the potential)


Water Polo

(practices longer than 45 minutes increase the potential)

(games increase the potential)


Synchronized swimming

(practices longer than 45 minutes increase the potential)

Introduction of organics

swim lessons

(lessons longer than ½ hour increases the potential)


(increases the potential)

wellness center

(increases the potential)

Swimmers with water bottles

(increases the potential)


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