Section 327IAC8-2-14. Reporting and record keeping requirements; systems that provide filtration

   (a) Effective June 29, 1993, 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 commissioner the information specified in this section. Systems shall submit information to the commissioner using the methods specified in section 13(e) of this rule.

  (b) Turbidity measurements as required by section 8.8(b) of this rule must be reported within ten (10) days after the end of each month the system serves water to the public. Information that must be reported includes the following:

(1) The total number of filtered water turbidity measurements taken during the month.

(2) 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 section 8.5(c) of this rule for the filtration technology being used.

(3) The date and value of any turbidity measurements taken during the month which exceed five (5) nephelometric turbidity units (NTU).

  (c) Disinfection information specified in section 8.8 of this rule must be reported to the commissioner within ten (10) days after the end of each month the system serves water to the public. Information that must be reported includes the following:

(1) For each day, the lowest measurement of residual disinfectant concentration in milligrams per liter in water entering the distribution system.

(2) The date and duration of each period when the residual disinfectant concentration in water entering the distribution system fell below two-tenths (0.2) milligram per liter and when the commissioner was notified of the occurrence.

(3) The following information on the samples taken in the distribution system in conjunction with total coliform monitoring under section 8.6 of this rule:

(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 greater than five hundred (500) per milliliter.

(E) Number of instances where the residual disinfectant concentration is not measured and HPC is greater than five hundred (500) per milliliter.

(F) For the current and previous month the system serves water to the public, the value of V in the following formula:

Where:	a	=	The value in clause (A).
	b	=	The value in clause (B).
	c	=	The value in clause (C).
	d	=	The value in clause (D).
	e	=	The value in clause (E).

(G) The commissioner may determine, 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 section 8.7(3) of this rule and that the system is providing adequate disinfection in the distribution system, the requirements of clauses (A) through (F) do not apply.

(4) A system need not report the data listed in subdivision (1) if all data listed in subdivisions (1) through (3) remain on file at the system and the commissioner determines that the system has submitted all the information required by subdivisions (1) through (3) for at least twelve (12) months.

  (d) Each system, upon discovering that a waterborne disease outbreak potentially attributable to that water system has occurred, must report that occurrence to the commissioner as soon as possible, but no later than by the end of the next business day. If at any time the turbidity exceeds five (5) NTU, the system must consult with the department of environmental management as soon as practical, but no later than twenty-four (24) hours after the exceedance is known in accordance with the public notification requirements under 327 IAC 8-2.1-9(b)(3). If at any time the residual falls below two-tenths (0.2) milligram per liter in the water entering the distribution system, the system must notify the commissioner as soon as possible, but no later than the end of the next business day. The system also must notify the commissioner by the end of the next business day whether or not the residual was restored to at least two-tenths (0.2) milligram per liter within four (4) hours. (Water Pollution Control Division; 327 IAC 8-2-14; filed Dec 28, 1990, 5:10 p.m.: 14 IR 1031; filed Apr 12, 1993, 11:00 a.m.: 16 IR 2163; filed Jul 23, 2001, 1:02 p.m.: 24 IR 3974; filed Nov 20, 2001, 10:20 a.m.: 25 IR 1096)