Are Per- and Polyfluoroalkyl Substances (PFAS) in Drinking Water Linked to Autism? 

According to recent research, there may be a link between autism and PFAS in drinking water, with exposure to these harmful substances raising the risk of developing autism spectrum disorders (ASD). Since these chemicals, also referred to as forever chemicals, linger in the environment and gradually build up in the human body, there is growing concern about PFAS in drinking water and autism. 

PFAS in drinking water and autism are linked through the harmful effects of these chemicals, which can cause bioaccumulation in the body. Exposure to forever chemicals like perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) has been shown to disrupt neurodevelopment, potentially contributing to autism-related symptoms, especially in children exposed during critical developmental stages. 

How Do PFAS in Drinking Water Affect Autism Risk? 

Understanding the relationship between PFAS in drinking water and autism is essential for reducing exposure to these harmful chemicals. Here’s how bioaccumulation of forever chemicals can influence neurodevelopment: 

Prenatal and Early Childhood Exposure:  

Exposure to PFAS in drinking water during pregnancy or early childhood can lead to bioaccumulation of these chemicals in the body, disrupting brain development. PFAS can interfere with the normal functioning of hormones and neurotransmitters, leading to an increased risk of autism. 

Long-Term Effects:  

Children exposed to PFAS in drinking water may experience delays in speech, social interaction, and behaviour. The forever chemicals accumulate over time, exacerbating developmental challenges and increasing the severity of autism symptoms. 

Visit providers like Autism Detect for personal consultations to understand how PFAS in drinking water and autism may affect your child’s development and explore strategies to reduce exposure to these harmful chemicals. 

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Exposure to Toxins or Pollutants.

Hannah Smith, MSc

Author

Hannah Smith is a clinical psychologist with a Master’s in Clinical Psychology and over three years of experience in behaviour therapy, special education, and inclusive practices. She specialises in Applied Behavior Analysis (ABA), Cognitive Behavioural Therapy (CBT), and inclusive education strategies. Hannah has worked extensively with children and adults with Autism Spectrum Disorder (ASD), ADHD, Down syndrome, and intellectual disabilities, delivering evidence-based interventions to support development, mental health, and well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy. 

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.