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Quality of Water

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...

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Related Experiment Video

Updated: Sep 12, 2025

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Published on: April 18, 2019

PFAS in Rural U.S. Well Water: Using Participatory Science to Identify and Communicate Results to Address Risks.

Erica Wood¹, Riley E Mulhern¹, Jacqueline MacDonald Gibson²

¹RTI International, Research Triangle Park, North Carolina 27709, United States.

Environmental Science & Technology

|August 7, 2025

Summary

This summary is machine-generated.

Per- and polyfluoroalkyl substances (PFAS) contaminate private wells, with higher levels near known sources. Many well users installed filters when advised, demonstrating a response to water quality information.

Keywords:

PFAS data report-back drinking water environmental health private well risk communication spatial regression

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Area of Science:

Environmental Science
Public Health
Water Quality Analysis

Background:

Drinking water is a significant source of exposure to per- and polyfluoroalkyl substances (PFAS).
Limited data exists on PFAS contamination in private wells, which serve a substantial portion of the U.S. population.
Understanding PFAS presence and sources in private wells is crucial for public health risk assessment.

Purpose of the Study:

To assess the prevalence and concentration of 25 PFAS in private wells across four U.S. states.
To investigate the relationship between proximity to potential PFAS sources and well water contamination.
To evaluate private well users' responses to receiving PFAS water quality information and recommendations.

Main Methods:

Collection and analysis of tap water samples from 271 private well users for 25 PFAS.
Utilized EPA's PFAS Analytic Tools and public databases to identify potential PFAS sources.
Employed spatial regression models to correlate household proximity to sources with water quality data.

Main Results:

PFAS were detected in 15% of wells even in areas without known sources, with some exceeding health guidelines.
Contamination levels were significantly higher (53-88%) in wells located near known PFAS sources.
Wells closer to production facilities, Superfund sites, spill sites, and federal facilities showed higher total PFAS concentrations.

Conclusions:

Geographic variations in private well PFAS contamination are influenced by proximity to industrial and federal facilities.
Private well users are likely to take action, such as installing water filters, when informed about contamination exceeding health guidelines.
This study highlights the importance of monitoring private wells and informing users about potential risks and mitigation strategies.