Current through Register Vol. 48, No. 38, September 20, 2024
A supplier using a surface water source or a groundwater
source under the direct influence of surface water that provides filtration
treatment must monthly report specific information to the Agency.
a) The supplier must report turbidity
measurements that Section
611.533(a)
requires within ten days after the end of each month the supplier serves water
to the public. The report must include specific information:
1) The total number of filtered water
turbidity measurements the supplier took during the month.
2) The number and percentage of filtered
water turbidity measurements the supplier took during the month that are less
than or equal to the turbidity limits Section
611.250 specifies for the
filtration technology the supplier uses.
3) The date and value of any turbidity
measurements the supplier took during the month that exceed 5 NTU.
b) The supplier must report the
disinfection information Section
611.533 specifies to the Agency
within ten days after the end of each month the supplier serves water to the
public. The report must include specific information:
1) For each day, the lowest RDC measurement
(in mg/L) in water entering the distribution system.
2) The date and duration of each period
during which the RDC in water entering the distribution system fell below
0.2 mg/L and when the supplier
notified the Agency of the occurrence.
3) Specific information on the samples the
supplier took in the distribution system for total coliform monitoring under
Sections 611.240 through
611.242:
A) The number of times when the supplier
measured the RDC;
B) The number of
times when the supplier did not measure the RDC but did measure HPC;
C) The number of times when the supplier
measured but did not detect RDC but did not measure HPC;
D) The number of times when the supplier
measured but did not detect the RDC, and the HPC is greater than
500/ml;
E) The number of times when
the supplier did not measure the RDC, and HPC is greater than 500/ml;
F) For the current and previous month the
supplier serves water to the public, the value of "V" in the following formula:
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where:
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a
|
=
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The value in subsection (b)(3)(A);
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|
b
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=
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The value in subsection (b)(3)(B);
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|
c
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=
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The value in subsection (b)(3)(C);
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|
d
|
=
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The value in subsection (b)(3)(D); and
|
|
e
|
=
|
The value in subsection (b)(3)(E).
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G)
Subsections (b)(3)(A) through (b)(3)(F) do not apply if the Agency determines,
under Section 611.213, that a supplier has no
means for having a sample analyzed for HPC by a certified laboratory under the
requisite time and temperature conditions specified by Section
611.531(a) and
that the supplier adequately provides disinfection in the distribution
system.
c)
Reporting Health Threats
1) Upon discovering
that a waterborne disease outbreak occurred that is potentially attributable to
its water system, a supplier must report that occurrence to the Agency as soon
as possible but no later than by the end of the next business day.
2) If at any time the turbidity exceeds 5
NTU, the supplier must consult with the Agency as soon as practical, but no
later than 24 hours the supplier knows of the exceedance, under Section
611.903(b)(3).
3) If at any time the RDC falls below
0.2 mg/L in the water entering
the distribution system, the supplier must notify the Agency as soon as
possible, but no later than by the end of the next business day. The supplier
must also notify the Agency by the end of the next business day whether or not
the supplier restored the to at least
0.2 mg/L within four
hours.
BOARD NOTE: This Section derives from
40 CFR
141.75(b).
