| (a) Disinfectant agent. Pool and spa water must be
continuously disinfected by a chlorine or bromine disinfectant agent
that can be easily measured by simple and accurate field tests.
(b) Supplemental treatment systems. Supplemental treatment
systems may be installed and used on pools and spas.
(1) Supplemental treatment systems used only to treat
water in a pool or spa and not a public interactive water feature
or fountain (PIWF) are not required to meet the minimum 3-log or 2-log
inactivation of Cryptosporidium parvum.
(2) Supplemental treatment systems used to treat water
in a PIWF must comply with the requirements in §265.306(g) of
this chapter (relating to Water Quality at Public Interactive Water
Features and Fountains) referring to supplemental water treatment
systems for PIWFs.
(3) Supplemental treatment systems must meet NSF Standard
50 or NSF Standard 60, have an Environmental Protection Agency (EPA)
or FIFRA registration, and be used in accordance with the manufacturer's
instructions.
(c) Secondary disinfection systems. Secondary disinfection
systems may be installed and used on a pool or spa and must be certified,
listed, and labeled to NSF Standard 50.
(1) Secondary disinfection systems must achieve a minimum
2-log (99%) reduction in the number of infective Cryptosporidium parvum oocysts per pass
though the treatment system; and
(2) must be located in the treatment system so that
the 2-log reduction is obtained.
(3) Validation records, as applicable, and operation
records must be maintained for any secondary disinfection system or
treatment, and must be maintained on-site, or made available to the
inspector within five business days upon request if kept off-site.
(d) Water treatment chemicals. Treatment chemicals
must be certified, listed, and labeled to either NSF Standard 50 or
NSF Standard 60 or have an EPA FIFRA registration and be used only
in accordance with the manufacturer's instructions.
(e) Chlorine gas prohibited. Use of compressed chlorine
gas is prohibited in pools and spas constructed on or after January
1, 2021.
(f) Training and protection. Personnel responsible
for the operation of the disinfectant agent and other potentially
hazardous chemicals, whether it is the trained and certified operator,
or someone assigned to maintain a pool or spa when the trained and
certified operator is not on-site, must be properly trained and provided
with appropriate protective equipment and clothing, including rubber
gloves and goggles, safety information, and safety data sheets. Safety
data sheets covering all chemicals for which personnel are responsible
must be kept on-site and be readily available.
(g) Application of disinfectant in a pool or spa.
(1) Automatic distribution of chemicals. If using automatic
feeders, automated controllers that adjust chemical feed based on
demand or manually, or remotely managed controllers for pool and spa
disinfection and pH control, must be installed. Automatic feeders
must meet NSF Standard 50 for use in public pools and spas and must
operate in a manner that does not invalidate the NSF rating for the
system and equipment.
(A) Controllers that adjust chemical feed either manually
or automatically are required.
(B) Disinfection equipment must be selected and monitored
so that continuous and effective disinfection can be achieved under
all conditions.
(C) Disinfectant feed systems must have the capacity
to maintain up to 5 parts per million (ppm) chlorine (or equivalent
bromine level) in outdoor pools and spas and up to 3 ppm chlorine
(or equivalent bromine level) in indoor pools and spas under all conditions
of intended use.
(D) Skimmer baskets or floating dispensers may not
be used to dispense disinfectant, chemicals that adjust pH, or algaecides.
(2) Hand distribution of chemicals. Hand distribution
of disinfectant chemicals, chemicals used to adjust pH, or algaecides
is prohibited when users are in the pool or spa. Before users reenter
the pool or spa following hand distribution of disinfectant chemicals,
chemicals used to adjust pH, or algaecides, the following applies:
(A) tests of disinfectant levels and pH must be performed
30 minutes after hand distribution; and
(B) no one may reenter the pool or spa until the disinfectant
levels and pH are checked and are found to be within the required
range.
(h) Bulk chemical tanks. All chemical bulk and day
tanks must be clearly labeled to indicate the tank's contents.
(i) Chemical storage areas.
(1) Disinfectant agents, other chemicals, and feed
equipment must be stored so that pool and spa users and other unauthorized
persons do not have access.
(2) Dry chemicals must be stored off the floor or in
waterproof containers in a dry room and protected against flooding
or wetting from floors, walls and ceiling.
(3) Chlorine compounds must not be stored in the same
storage room or storage area as petroleum products.
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