(A) Public water systems that do not add supplemental
fluoride.
(1) Monitoring and compliance determinations for
the secondary maximum contaminant level (SMCL) for fluoride specified in rule
3745-82-02 of the Administrative Code shall be as follows:
(a) Public water systems
may use the monitoring conducted for compliance with the maximum contaminant
level (MCL) in paragraph (B) of rule 3745-81-11 of the Administrative Code to
determine compliance with the SMCL for fluoride. The required monitoring to
determine compliance with the MCL is specified in rule 3745-81-23 of the
Administrative Code.
(b) If a public water
system collects more than one sample per year, it shall be in compliance when
the average of quarterly averages of all samples collected at each entry point
to the distribution system during a calendar year does not exceed the SMCL for
fluoride.
(c) Public water systems
that collect one sample annually or less frequently shall be in compliance when
the most recent sample does not exceed the SMCL for fluoride. When a public
water system is required to take a confirmation sample under paragraph (F) of
rule 3745-81-23 of the Administrative Code, the system shall be in compliance
if the average of the initial and confirmation sample results does not exceed
the SMCL for fluoride.
(B) Public water systems that add supplemental
fluoride.
(1) Monitoring and compliance determinations for
the SMCL for fluoride specified in rule 3745-82-02 of the Administrative Code
shall be as follows:
(a) Public water systems
shall use the monitoring conducted for compliance with rule 3745-83-01 of the
Administrative Code to determine compliance with the SMCL for
fluoride.
(b) A public water system
shall be in compliance when the running annual average of monthly averages of
all samples collected at each entry point to the distribution system as
determined monthly does not exceed the fluoride SMCL.
(2) Public water systems adding fluoride shall maintain a
fluoride range of 0.8 milligrams per liter to 1.3 milligrams per liter in their
finished water pursuant to section 6109.20 of the Revised Code. Compliance
shall be determined monthly at each entry point, based on the average of all
daily samples collected for compliance with rule 3745-83-01 of the
Administrative Code. The monthly average fluoride content must be between 0.8
and 1.3 milligrams per liter at each entry point. A public water system shall
notify Ohio EPA within forty-eight hours of any instance in which the daily
average fluoride concentration is greater than 1.3 milligrams per liter. If a
public water system has four or more days during a month in which the daily
average fluoride concentration is outside a range of 0.7 milligrams per liter
to 1.3 milligrams per liter, the public water system is in violation unless the
system has approval from the director to perform a tracer study and the
fluoride level in the distribution system does not exceed 2.0 milligrams per
liter.
(3) Public water systems that add supplemental fluoride shall
keep a daily record of the amount of fluoride compound added, the quantity of
water fluoridated, the calculated fluoride dosage, and the fluoride content of
the water as delivered to their customers.
(4) Public water systems that lose their capability to accurately
determine the fluoride content of their finished water due to laboratory
equipment failure or malfunction, shall cease feeding all fluoride compounds
and notify the Ohio EPA within forty-eight hours with a tentative schedule for
re-establishing laboratory capabilities.
(5) Public water systems that lose their capability to feed
fluoride shall notify Ohio EPA within forty-eight hours and provide a tentative
schedule for resumption of acceptable fluoridation.
(6) A public water system determined to exceed 10.0 milligrams
per liter due to over-feed events may be required to issue a no-use
advisory.
(C) A public water system determined to exceed the SMCL for
fluoride under paragraph (A) or (B) of this rule shall notify the persons
served by the public water system in accordance with paragraph (D) of rule
3745-81-32 of the Administrative Code.
