Minnesota Administrative Rules

4715.2250 DISINFECTION OF POTABLE WATER SYSTEM.

New or repaired potable water systems shall be disinfected prior to use whenever required by the authority having jurisdiction. The method to be followed shall be that prescribed by the health authority or, in case no method is prescribed, the following:

A.

the pipe system shall be flushed with clean, potable water until no dirty water appears at the points of outlet;

B.

the system or part thereof shall be filled with a water chlorine solution containing at least 50 parts per million of chlorine and the system or part thereof shall be valved off and allowed to stand for 24 hours; or

C.

the system or part thereof shall be filled with a water-chlorine solution containing at least 200 parts per million of chlorine and allowed to stand for three hours; and

D.

following the allowed standing time the system shall be flushed with clean potable water until no chlorine remains in the water coming from the system.

Statutory Authority:

MS s 326.37 to 326.45; 326B.43 to 326B.49

History:

17 SR 1279; L 2007 c 140 art 6 s 15; art 13 s 4

Published Electronically:

May 14, 2012