Indiana Administrative Code › Title 327 - WATER POLLUTION CONTROL DIVISION › Article 8 - PUBLIC WATER SUPPLY › Rule 2 - Drinking Water Standards › Section 2-21 - Special monitoring for sodium

Current through July 10, 2024
Authority: IC 13-13-5; IC 13-14-8-7; IC 13-14-9; IC 13-18-3;
				  IC 13-18-16
Affected: IC 13-11-2; IC 13-14-8; IC 13-18-1; IC
				  13-18-2
Sec. 21.
(a)
				Suppliers of water for community public water systems shall collect and analyze
				one (1) sample per treatment plant at the entry point of the distribution
				system for the determination of sodium concentration levels. Samples must be
				collected and analyzed annually for systems utilizing surface water sources in
				whole or in part, and at least every three (3) years for systems utilizing
				solely ground water sources. The minimum number of samples required to be taken
				by the system shall be based on the number of treatment plants used by the
				system, except that multiple wells drawing raw water from a single aquifer may,
				with the commissioner's approval, be considered one (1) treatment plant for
				determining the minimum number of samples. The supplier of water may be
				required by the commissioner to collect and analyze water samples for sodium
				more frequently in locations where the sodium content is variable.
(b) The supplier of water shall report to the
				commissioner the results of the analyses for sodium within the first ten (10)
				days of the month following the month in which the sample results were received
				or within the first ten (10) days following the end of the required monitoring
				period as stipulated by the commissioner, whichever of these is first. If more
				than annual sampling is required, the supplier shall report the average sodium
				concentration within ten (10) days of the month following the month in which
				the analytical result of the last sample used for the annual average was
				received. Systems shall submit information to the commissioner using the
				methods specified in section 13(e) of this rule.
(c) The supplier of water shall notify the
				commissioner and appropriate local public health officials of the sodium levels
				by written notice by direct mail within three (3) months. A copy of each notice
				required to be provided by this subsection shall be sent to the commissioner
				within ten (10) days of its issuance. The supplier of water is not required to
				notify the commissioner and appropriate local public health officials of the
				sodium levels where the commissioner provides such notices in lieu of the
				supplier.
(d) Analyses for sodium
				shall be performed by the following methods:
(1) Inductively coupled plasma, Method
				200.7*.
(2) Atomic absorption;
				direct aspiration, Method 3111B*. *Methods referenced in this section may be
				obtained as follows:
(1) Method 200.7 may be
				found in "Methods for the Determination of Metals in Environmental
				Samples-Supplement 1", EPA-600/R-94-111, May 1994, available from NTIS,
				PB95-125472, U.S. Department of Commerce, 5285 Port Royal Road, Springfield,
				Virginia 22161.
(2) Method 3111B
				may be found in "Standard Methods for the Examination of Water and Wastewater",
				18th Edition, 1992, or "Standard Methods for the
				Examination of Water and Wastewater", 19th Edition,
				1995, American Public Health Association, available from the American Public
				Health Association, 1015 Fifteenth Street N.W., Washington, D.C. 20005. Either
				edition may be used.
These methods are available for copying at the Indiana
				  Department of Environmental Management, Office of Water Quality, 100 North
				  Senate Avenue, Room N1255, Indianapolis, Indiana 46204.