[Code of Federal Regulations]
[Title 40, Volume 22]
[Revised as of July 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR141.75]
[Page 453-456]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 141_NATIONAL PRIMARY DRINKING WATER REGULATIONS--Table of Contents
Subpart H_Filtration and Disinfection
Sec. 141.75 Reporting and recordkeeping requirements.
(a) A public water system that uses a surface water source and does
not provide filtration treatment must report monthly to the State the
information specified in this paragraph (a) beginning December 31, 1990,
unless the State has determined that filtration is required in writing
pursuant to section 1412(b)(7)(C)(iii), in which case the State may
specify alternative reporting requirements, as appropriate, until
filtration is in place. A public water system that uses a ground water
source under the direct influence of surface water and does not provide
filtration treatment must report monthly to the State the information
specified in this paragraph (a) beginning December 31, 1990, or 6 months
after the State determines that the ground water source is under the
direct influence of surface water, whichever is later, unless the State
has determined that filtration is required in writing pursuant to Sec.
1412(b)(7)(C)(iii), in which case the State may specify alternative
reporting requirements, as appropriate, until filtration is in place.
(1) Source water quality information must be reported to the State
within 10 days after the end of each month the system serves water to
the public. Information that must be reported includes:
(i) The cumulative number of months for which results are reported.
(ii) The number of fecal and/or total coliform samples, whichever
are analyzed during the month (if a system monitors for both, only fecal
coliforms must be reported), the dates of sample collection, and the
dates when the turbidity level exceeded 1 NTU.
(iii) The number of samples during the month that had equal to or
less than 20/100 ml fecal coliforms and/or equal to or less than 100/100
ml total coliforms, whichever are analyzed.
(iv) The cumulative number of fecal or total coliform samples,
whichever are analyzed, during the previous six months the system served
water to the public.
(v) The cumulative number of samples that had equal to or less than
20/100 ml fecal coliforms or equal to or less than 100/100 ml total
coliforms, whichever are analyzed, during the previous six months the
system served water to the public.
(vi) The percentage of samples that had equal to or less than 20/100
ml fecal coliforms or equal to or less than 100/100 ml total coliforms,
whichever are analyzed, during the previous six months the system served
water to the public.
(vii) The maximum turbidity level measured during the month, the
date(s) of occurrence for any measurement(s) which exceeded 5 NTU, and
the date(s) the occurrence(s) was reported to the State.
[[Page 454]]
(viii) For the first 12 months of recordkeeping, the dates and
cumulative number of events during which the turbidity exceeded 5 NTU,
and after one year of recordkeeping for turbidity measurements, the
dates and cumulative number of events during which the turbidity
exceeded 5 NTU in the previous 12 months the system served water to the
public.
(ix) For the first 120 months of recordkeeping, the dates and
cumulative number of events during which the turbidity exceeded 5 NTU,
and after 10 years of recordkeeping for turbidity measurements, the
dates and cumulative number of events during which the turbidity
exceeded 5 NTU in the previous 120 months the system served water to the
public.
(2) Disinfection information specified in Sec. 141.74(b) must be
reported to the State within 10 days after the end of each month the
system serves water to the public. Information that must be reported
includes:
(i) For each day, the lowest measurement of residual disinfectant
concentration in mg/l in water entering the distribution system.
(ii) The date and duration of each period when the residual
disinfectant concentration in water entering the distribution system
fell below 0.2 mg/l and when the State was notified of the occurrence.
(iii) The daily residual disinfectant concentration(s) (in mg/l) and
disinfectant contact time(s) (in minutes) used for calculating the CT
value(s).
(iv) If chlorine is used, the daily measurement(s) of pH of
disinfected water following each point of chlorine disinfection.
(v) The daily measurement(s) of water temperature in [deg]C
following each point of disinfection.
(vi) The daily CTcalc and CTcalc/CT99.9 values for each
disinfectant measurement or sequence and the sum of all CTcalc/
CT99.9 values ((CTcalc/CT99.9)) before or at the
first customer.
(vii) The daily determination of whether disinfection achieves
adequate Giardia cyst and virus inactivation, i.e., whether (CTcalc/
CT99.9) is at least 1.0 or, where disinfectants other than
chlorine are used, other indicator conditions that the State determines
are appropriate, are met.
(viii) The following information on the samples taken in the
distribution system in conjunction with total coliform monitoring
pursuant to Sec. 141.72:
(A) Number of instances where the residual disinfectant
concentration is measured;
(B) Number of instances where the residual disinfectant
concentration is not measured but heterotrophic bacteria plate count
(HPC) is measured;
(C) Number of instances where the residual disinfectant
concentration is measured but not detected and no HPC is measured;
(D) Number of instances where the residual disinfectant
concentration is detected and where HPC is 500/ml;
(E) Number of instances where the residual disinfectant
concentration is not measured and HPC is 500/ml;
(F) For the current and previous month the system served water to
the public, the value of ``V'' in the following formula:
[GRAPHIC] [TIFF OMITTED] TC15NO91.136
where:
a=the value in paragraph (a)(2)(viii)(A) of this section,
b=the value in paragraph (a)(2)(viii)(B) of this section,
c=the value in paragraph (a)(2)(viii)(C) of this section,
d=the value in paragraph (a)(2)(viii)(D) of this section, and
e=the value in paragraph (a)(2)(viii)(E) of this section.
(G) If the State determines, based on site-specific considerations,
that a system has no means for having a sample transported and analyzed
for HPC by a certified laboratory under the requisite time and
temperature conditions specified by Sec. 141.74(a)(1) and that the
system is providing adequate disinfection in the distribution system,
the requirements of paragraph (a)(2)(viii) (A)-(F) of this section do
not apply to that system.
(ix) A system need not report the data listed in paragraphs (a)(2)
(i), and (iii)-(vi) of this section if all data listed in paragraphs
(a)(2) (i)-(viii) of this section remain on file at the system, and the
State determines that:
[[Page 455]]
(A) The system has submitted to the State all the information
required by paragraphs (a)(2) (i)-(viii) of this section for at least 12
months; and
(B) The State has determined that the system is not required to
provide filtration treatment.
(3) No later than ten days after the end of each Federal fiscal year
(September 30), each system must provide to the State a report which
summarizes its compliance with all watershed control program
requirements specified in Sec. 141.71(b)(2).
(4) No later than ten days after the end of each Federal fiscal year
(September 30), each system must provide to the State a report on the
on-site inspection conducted during that year pursuant to Sec.
141.71(b)(3), unless the on-site inspection was conducted by the State.
If the inspection was conducted by the State, the State must provide a
copy of its report to the public water system.
(5)(i) Each system, upon discovering that a waterborne disease
outbreak potentially attributable to that water system has occurred,
must report that occurrence to the State as soon as possible, but no
later than by the end of the next business day.
(ii) If at any time the turbidity exceeds 5 NTU, the system must
consult with the primacy agency as soon as practical, but no later than
24 hours after the exceedance is known, in accordance with the public
notification requirements under Sec. 141.203(b)(3).
(iii) If at any time the residual falls below 0.2 mg/l in the water
entering the distribution system, the system must notify the State as
soon as possible, but no later than by the end of the next business day.
The system also must notify the State by the end of the next business
day whether or not the residual was restored to at least 0.2 mg/l within
4 hours.
(b) A public water system that uses a surface water source or a
ground water source under the direct influence of surface water and
provides filtration treatment must report monthly to the State the
information specified in this paragraph (b) beginning June 29, 1993, or
when filtration is installed, whichever is later.
(1) Turbidity measurements as required by Sec. 141.74(c)(1) must be
reported within 10 days after the end of each month the system serves
water to the public. Information that must be reported includes:
(i) The total number of filtered water turbidity measurements taken
during the month.
(ii) The number and percentage of filtered water turbidity
measurements taken during the month which are less than or equal to the
turbidity limits specified in Sec. 141.73 for the filtration technology
being used.
(iii) The date and value of any turbidity measurements taken during
the month which exceed 5 NTU.
(2) Disinfection information specified in Sec. 141.74(c) must be
reported to the State within 10 days after the end of each month the
system serves water to the public. Information that must be reported
includes:
(i) For each day, the lowest measurement of residual disinfectant
concentration in mg/l in water entering the distribution system.
(ii) The date and duration of each period when the residual
disinfectant concentration in water entering the distribution system
fell below 0.2 mg/l and when the State was notified of the occurrence.
(iii) The following information on the samples taken in the
distribution system in conjunction with total coliform monitoring
pursuant to Sec. 141.72:
(A) Number of instances where the residual disinfectant
concentration is measured;
(B) Number of instances where the residual disinfectant
concentration is not measured but heterotrophic bacteria plate count
(HPC) is measured;
(C) Number of instances where the residual disinfectant
concentration is measured but not detected and no HPC is measured;
(D) Number of instances where no residual disinfectant concentration
is detected and where HPC is 500/ml;
(E) Number of instances where the residual disinfectant
concentration is not measured and HPC is 500/ml;
(F) For the current and previous month the system serves water to
the public, the value of ``V'' in the following formula:
[[Page 456]]
[GRAPHIC] [TIFF OMITTED] TC15NO91.137
where:
a=the value in paragraph (b)(2)(iii)(A) of this section,
b=the value in paragraph (b)(2)(iii)(B) of this section,
c=the value in paragraph (b)(2)(iii)(C) of this section,
d=the value in paragraph (b)(2)(iii)(D) of this section, and
e=the value in paragraph (b)(2)(iii)(E) of this section.
(G) If the State determines, based on site-specific considerations,
that a system has no means for having a sample transported and analyzed
for HPC by a certified laboratory within the requisite time and
temperature conditions specified by Sec. 141.74(a)(1) and that the
system is providing adequate disinfection in the distribution system,
the requirements of paragraph (b)(2)(iii) (A)-(F) of this section do not
apply.
(iv) A system need not report the data listed in paragraph (b)(2)(i)
of this section if all data listed in paragraphs (b)(2) (i)-(iii) of
this section remain on file at the system and the State determines that
the system has submitted all the information required by paragraphs
(b)(2) (i)-(iii) of this section for at least 12 months.
(3)(i) Each system, upon discovering that a waterborne disease
outbreak potentially attributable to that water system has occurred,
must report that occurrence to the State as soon as possible, but no
later than by the end of the next business day.
(ii) If at any time the turbidity exceeds 5 NTU, the system must
consult with the primacy agency as soon as practical, but no later than
24 hours after the exceedance is known, in accordance with the public
notification requirements under Sec. 141.203(b)(3).
(iii) If at any time the residual falls below 0.2 mg/l in the water
entering the distribution system, the system must notify the State as
soon as possible, but no later than by the end of the next business day.
The system also must notify the State by the end of the next business
day whether or not the residual was restored to at least 0.2 mg/l within
4 hours.
[54 FR 27527, June 29, 1989, as amended at 65 FR 26022, May 4, 2000; 69
FR 38856, June 29, 2004]