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US EPA: Federal Register Notice-Preliminary Regulatory Determinations

Federal Register Notice-Preliminary Regulatory Determinations

Today, a notice appeared in the Federal Register announcing EPA’s preliminary regulatory determinations.



The Agency is making preliminary determinations to regulate two contaminants (i.e., PFOS and PFOA) and to not regulate six

contaminants (i.e., 1,1-dichloroethane, acetochlor, methyl bromide, metolachlor, nitrobenzene, and RDX).


A preliminary regulatory determination lays out and takes comment on EPA’s view about whether certain unregulated contaminants meet

three statutory criteria. After EPA considers public comment, EPA makes a final determination.


The EPA seeks comment on these preliminary determinations. The EPA is also presenting an update on three other

CCL 4 contaminants (strontium, 1,4-dioxane, and 1,2,3-trichloropropane).


Comments must be received on or before May 11, 2020.


EPA’s 50th Anniversary: Progress for a Stronger Future


Patti Kay Wisniewski

Drinking Water Preparedness and Resiliency Coordinator

US EPA Region 3

Drinking Water Section (3WD21)

1650 Arch Street

Phila, PA  19103



Cell: 215-514-7893


(note the hyphen appears in email only)

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