Available Now: 2023 Schedule of Hazmat & RCRA Training

First National Limits for PFAS in Drinking Water Proposed

Posted on 3/15/2023 by Nick Waldron and Roger Marks

US EPA is proposing drinking water limits for six per- and polyfluoroalkyl substances (PFAS). The regulation would create the nation’s first-ever national limits for a widely used class of substances nicknamed “forever chemicals” because they do not break down over time.

The proposed rule would establish Maximum Contaminant Levels (MCLs) for these PFAS:

  • PFOA (perfluorooctanoic acid), 
  • PFOS (perfluorooctane sulfonic acid), 
  • PFNA (perflouorononanoic acid), 
  • HFPO-DA or “GenX” (hexafluoroproplyene oxide dimer acid), 
  • PFHxS (perfluorohexane sulfonic acid), and
  • PFBS (perfluorobutane sulfonic acid). 

The proposed MCLs for these six PFAS as follows:  

First National Limits for PFAS in Drinking Water Proposed

  • For PFOA, 4.0 parts-per-trillion 
  • For PFOS, 4.0 parts-per-trillion
  • For the other four PFAS, an MCL of 1.0*  

*The MCL of 1.0 is cumulative, based on a Hazard Index (HI) combining various risk factors.

The proposed rule also creates unenforceable health-based level of zero for PFOA and PFOS. 

A pre-publication version of the proposed rule is available now.

The official proposed rule should be published to the Federal Register in short order. Lion will update this post on the same day it's published.

About National Primary Drinking Water Regulation (NPDWR) 

The Safe Drinking Water Act authorizes US EPA to create National Primary Drinking Water Regulations (NPDWR). These regulations generally include limits on the concentration in drinking water of certain kinds of substances—microorganisms, organic and inorganic chemicals, disinfectants, and radionuclides. 

Public water systems or PWS (defined in 40 CFR 141.3) must notify customers via specified means whenever they detect a violation of a NPDWR. 

testing water for PFAS

WebinarComplete Environmental Regulations Training

Join a Lion instructor for the next Complete Environmental Regulations Webinar on May 18–19. Get an overview of US EPA’s major air, water, and chemical programs—from the Clean Air and Clean Water Acts to EPCRA, TSCA, Superfund, and more.

Prefer to train right now, at your own pace? Try the interactive online course.

Tags: drinking water, PFAS

Find a Post

Compliance Archives

Lion - Quotes

The course was very well structured and covered the material in a clear, concise manner.

Ian Martinez

Hazmat Shipping Professional

Course instructor was better prepared and presented better than other trainers. Course manual and references were easier to use as well.

Marty Brownfield

Hazardous Waste Professional

The instructor was excellent. They knew all of the material without having to read from a notepad or computer.

Gary Hartzell

Warehouse Supervisor

The instructor was very patient and engaging - willing to answer and help explain subject matter.

Misty Filipp

Material Control Superintendent

I really enjoyed this training. Even after years on both sides of the comprehension coin, I find myself still learning! The quality of the delivery exceeded much of the training I have received in the past.

Neil Ozonur

Safety Officer

Excellent. I learned more in two days with Lion than at a 5-day program I took with another provider.

Francisco Gallardo

HES Technician

I chose Lion's online webinar because it is simple, effective, and easily accessible.

Jeremy Bost

Environmental Health & Safety Technician

The course was very informative and presented in a way that was easily understood and remembered. I would recommend this course.

Jeffrey Tierno

Hazmat Shipping Professional

I like the consistency of Lion workshops. The materials are well put together and instructors are top notch!

Kevin Pylka

Permitting, Compliance & Environmental Manager

The instructor does a great job at presenting material in an approachable way. I have been able to save my company about $30,000 in the last year with what I have learned from Lion!

Curtis Ahonen

EHS&S Manager

Download Our Latest Whitepaper

Some limited quantity reliefs are reserved for specific modes of transport. Use this guide to identify which reliefs you can capitalize on, and which do not apply to your operations.

Latest Whitepaper

By submitting your phone number, you agree to receive recurring marketing and training text messages. Consent to receive text messages is not required for any purchases. Text STOP at any time to cancel. Message and data rates may apply. View our Terms & Conditions and Privacy Policy.