Rules Governing Public Water Systems

This site contains links to the rules and regulations applicable to public water systems for the State of North Carolina.  The rules are found in Title 15A, Subchapter 18C of the North Carolina Administrative Codes.  Because the state "Rules Governing Public Water Systems" has adopted both state laws and federal regulations by reference, copies of these adoptions are incorporated into the rules on line.  Each adoption is preceded by "ADOPTED BY REFERENCE" and printed in bold print.  The rules and regulations are as current as possible as of July 2010.  The most recent version of federal regulations may be found at the following C.F.R. websites: 40 C.F.R. Part 141; 40 C.F.R. Part 142.

These documents are provided as a courtesy to the public.  Every effort has been made to ensure the accuracy and completeness of these documents. However, the Public Water Supply Section does not guarantee the accuracy of this information.  Compliance with requirements of the regulations and statutes is the responsibility of the individual water system owners.  If any discrepancies are found, please notify us by sending an e-mail message to with the subject line "PWSS Rules."

To view or print the rules you will need Adobe Acrobat Reader (download Adobe Acrobat Reader).

Revised Rules (Effective July 1, 2019)

North Carolina Adminstrative Code Title 15A Chapter 18 Rules (NC OAH)


Printed copies of the "Rules Governing Public Water Systems" are now available at a cost of $12.27 per copy (price is subject to change).  Checks or money orders should be made payable to DEQ-Public Water Supply Section and mailed to:  Public Water Supply Section, 1634 Mail Service Center, Raleigh, NC 27699-1634.  Copies may also be purchased on the 13th floor of the Archdale Building, 512 N. Salisbury Street, Raleigh 27604.  Cash is no longer accepted.