[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: 40CFR141.41]



[Page 431]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 141_NATIONAL PRIMARY DRINKING WATER REGULATIONS--Table of Contents

 

  Subpart E_Special Regulations, Including Monitoring Regulations and 

                         Prohibition on Lead Use

 

Sec. 141.41  Special monitoring for sodium.



    (a) Suppliers of water for community public water systems shall 

collect and analyze one sample per 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 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 

State approval, be considered one treatment plant for determining the 

minimum number of samples. The supplier of water may be required by the 

State 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 EPA and/or the State the 

results of the analyses for sodium within the first 10 days of the month 

following the month in which the sample results were received or within 

the first 10 days following the end of the required monitoring period as 

stipulated by the State, whichever of these is first. If more than 

annual sampling is required the supplier shall report the average sodium 

concentration within 10 days of the month following the month in which 

the analytical results of the last sample used for the annual average 

was received. The supplier of water shall not be required to report the 

results to EPA where the State has adopted this regulation and results 

are reported to the State. The supplier shall report the results to EPA 

where the State has not adopted this regulation.

    (c) The supplier of water shall notify appropriate local and State 

public health officials of the sodium levels by written notice by direct 

mail within three months. A copy of each notice required to be provided 

by this paragraph shall be sent to EPA and/or the State within 10 days 

of its issuance. The supplier of water is not required to notify 

appropriate local and State public health officials of the sodium levels 

where the State provides such notices in lieu of the supplier.

    (d) Analyses for sodium shall be conducted as directed in Sec. 

141.23(k)(1).



[45 FR 57345, Aug. 27, 1980, as amended at 59 FR 62470, Dec. 5, 1994]