105 CMR 430.302
Cross Connections Prohibited
The operator shall not permit any physical connection to exist between any pipe carrying
drinking water and any waste pipe, soil pipe, service drain or any pipe carrying water from any
source or system not approved by the Massachusetts Department of Environmental Protection
(DEP), unless said connection is maintained in compliance with 310 CMR 22.22: Cross
Connections promulgated by DEP, and said connection has been approved in writing by DEP.