Skip to main content

Mandatory Health Effects Language (MHEL)


The following information is intended for public water supply operators.

Public Notifications

Part 5, Sub-part 5-1 of the New York State Sanitary Code establishes requirements for public drinking water supplies.  Section 5-1.78 of Sub-part 5-1 requires owners or operators of public water systems to provide public notification to consumers when certain conditions are identified in the public water supply.  These conditions include:

  • a public health hazard
  • maximum contaminant level (MCL), maximum residual disinfectant level (MRDL), treatment technique, and/or monitoring and testing procedure violations
  • any other situation posing a risk to public health

Language describing potential adverse health effects associated with an identified hazard or violation must be contained in a public notification to consumers.  If a MCL, MRDL, and/or treatment technique violation exists, then mandatory health effects language (MHEL) must also be part of the notification.

Public water system operators should refer to Section 5-1.78 of Part 5, Sub-part 5-1 of the New York State Sanitary Code for more information about content, presentation, and standard language requirements for public notifications.  A template for public notifications is also available from the Dutchess County Department of Behavioral & Community Health.


Mandatory Health Effects Language 

The following is a list of analytes that can be present in drinking water.  Clicking on one will bring up the mandatory health effects language for that analyte.  The following information was obtained from the New York State Department of Health, the Environmental Protecton Agency, the Centers for Disease Control and Prevention, and other sources as indicated.


Inorganics (16)
Antimony Asbestos Barium
Cadmium Chromium Chloride
Fluoride Manganese Mercury
Nitrate Nitrite Perchlorate
Selenium Strontium Sulfate
Disinfection and Disinfection Byproducts (6)
Bromate Chlorine Chloramines
Chlorine Dioxide Disinfection Byproducts and Treatment Techniques for DBPs Chlorite
Organic Contaminants (63)
Acrylamide Alachlor Aldicarb
Aldicarb sulfone Aldicarb sulfoxide Atrazine
Benzene Bromochloromethane Bromomethane
Butyl Alcohol Carbofuran Carbon tetrachloride
Chlordane Chloroethane Chloromethane
Cumene 2,4-D Dacthal and Tetrachloroterephthalic Acid
Dibromochloropropane Di isopropyl ether
(see Butyl Alcohol)
1,4-Dichlorobenzene Dichlorodifluoromethane (Freon 12) 1,1-Dichloroethane
1,2-Dichloroethane 1,1-Dichloroethene Cis-1,2-Dichloroethene
Trans-1,2-Dichloroethene Dichloromethane 1,2-Dichloropropane
Epichlorohydrin Ethylbenzene Ethylene Dibromide
Heptachlor Heptachlor Epoxide Hexachlorobenzene
Hexachlorobutadiene Hexachlorocyclopentadiene Lindane
Methoxychlor Monochlorobenzene MTBE
Pentachlorophenol Polychlorinated Biphenyls (PCBs) Styrene
Tertiary Butyl Alcohol (TBA)
(See Butyl Alcohol)
1,2,3,4-Tetrachlorobenzene 1,2,4,6-Tetrachlorobenzene
Tetrachloroethene Toluene Toxaphene
2,4,5-TP 1,2,3-Trichlorobenzene 1,2,4-Trichlorobenzene
1,3,5-Trichlorobenzene 1,1,1-Trichloroethane Trichloroethene
(Freon 11)
2,4,5-Trichlorophenol 1,1,2-Trichloro-1,2,2-
(Freon 113)
Trihalomethanes Vinyl Chloride Xylene
Turbidty (2)
Turbidity Surface Water Treatment Rule Treatment Technique Violation  
Microbiological (3)
Total Coliform E. Coli Cryptosporidium: Advisory for the Immunocompromised
Radionuclides (6)
Radon (Proposed) Radium 226 (Proposed) Radium 228 (Proposed)
Gross Alpha (Proposed) Uranium (Proposed) Beta and photon emitters (Proposed)
Miscellaneous (2)
Potassium Permanganate (Draft) Surface Water Treatment Rule