First National PFAS Drinking Water Standards Finalized

Posted on 4/23/2024 by Lion Technology Inc.

Update 4/26/24

On Friday, April 26, US EPA published the Final Rule to the Federal Register. The rule will take effect on June 25, 2024.

See the Final Rule.

EPA recently finalized the first-ever national, legally enforceable drinking water standard to protect communities from exposure to per- and polyfluoroalkyl substances (PFAS).

The rule sets limits for five PFAS:

  • PFOA
  • PFOS 
  • PFNA 
  • PFHxS
  • HFPO-DA (also known as “GenX”)
The Final Rule has not yet been published to the Federal Register. Lion staff will update this post when an effective date for the rule is announced. 

Maximum Contaminant Levels (MCLs) for PFAS

For PFOA and PFOS, EPA is setting a Maximum Contaminant Level Goal (MCLG), a non-enforceable health-based goal, at zero. EPA is setting enforceable Maximum Contaminant Levels (MCLs) at 4.0 parts per trillion for PFOA and PFOS, individually.

For PFNA, PFHxS, and GenX, EPA is setting the MCLGs and MCLs at 10 parts per trillion.

EPA is also setting a limit for any mixture of two or more of the following PFAS: PFNA, PFHxS, PFBS, and GenX.

More On This Action

EPA says this final rule will reduce PFAS exposure for approximately 100 million people, prevent thousands of deaths, and reduce tens of thousands of serious illnesses.

The Agency also estimates that 6–10% of the 66,000 public drinking water systems subject to this rule may have to take action to reduce PFAS to meet new standards.

All public water systems:

  • Have three years to complete their initial monitoring for these chemicals.
  • Must inform the public of the level of PFAS measured in their drinking water.
  • Must implement solutions to reduce PFAS in their drinking water within five years if PFAS is found at levels that exceed these standards.

EPA will host a series of webinars to provide information to the public, communities, and water utilities about the final PFAS drinking water regulation.

EH&S professionals who finish the Complete Environmental Regulations Online Course can identify the regulations that apply to their facility and locate key requirements to achieve compliance with the Clean Air and Clean Water Acts to EPCRA, TSCA, Superfund, and more.

Find a Post

Compliance Archives

Lion - Quotes

The exercises in the DOT hazardous materials management course are especially helpful in evaluating your understanding of course information.

Morgan Bliss

Principal Industrial Hygienist

Lion was very responsive to my initial questions and the website was user friendly.

Michael Britt

Supply Chain Director

If I need thorough training or updating, I always use Lion. Lion is always the best in both instruction and materials.

Bryce Parker

EHS Manager

This was the 1st instructor that has made the topic actually enjoyable and easy to follow and understand. Far better than the "other" training providers our company has attended!

Lori Hardy

Process & Resource Administrator

Much better than my previous class with another company. The Lion instructor made sense, kept me awake and made me laugh!

Marti Severs

Enterprise Safety Manager

The instructor was great, explaining complex topics in terms that were easily understandable and answering questions clearly and thoroughly.

Brittany Holm

Lab Supervisor

As always, Lion never disappoints

Paul Resley

Environmental Coordinator

The training was impressive. I am not a fan of online training but this was put together very well. I would recommend Lion to others.

Donnie James

Quality Manager

The workshop covered a lot of information without being too overwhelming. Lion is much better, more comprehensive than other training providers.

George Alva

Manufacturing Manager

Lion is easily and consistently the best option for compliance training. I've learned new information from every instructor I've had.

Rachel Mathis

EHS Specialist

Download Our Latest Whitepaper

What to do before, during, and after a RCRA hazardous waste inspection to defend your site from rising State and Federal penalties.

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.