UCMR4 Analysis

To protect public health and provide safe drinking water, the EPA published the fourth Unregulated Contaminant Monitoring Rule (UCMR4) in the Federal Register on December 20, 2016.

McCampbell Analytical, Inc. has begun the process of becoming an accredited laboratory for these new methods that are designed to identify a total of 30 contaminants/groups. These consist of ten cyanotoxins/groups, two metals, eight pesticides plus one pesticide manufacturing byproduct, three brominated haloacetic acid groups of disinfection byproducts, three alcohols, and three semivolatile organic chemicals.


UCMR4 sampling and analysis begins on January 2018 and all public water supplies (PWS) serving more than 10,000 people are required to provide monitoring for a 12 month period, between January 2018 and December 2020.

There will also be 800 randomly selected surface water (SW) or ground water under the direct influence of surface water (GWUDI) systems. The EPA will pay for all analytical costs associated with monitoring at small systems.

With over 25 years of experience providing our clients with superior drinking water analysis, including past UCMR requirements, MAI is an excellent choice for your UCMR4 questions and testing needs.

For more information regarding our services, please contact our Marketing Department

For more information concerning the Fourth Unregulated Contaminant Monitoring Rule, please visit the EPA Website

UCMR 4 Public Meeting and Webinar - April 12, 2017

This PDF presentation provides an overview of the UCMR 4 program and includes PWS guidelines for setting up an SDWARS account. Agency links are provided in the presentation for appropriate communication avenues.

PWS sample schedule deadline is December 17, 2017.

Additional training is slated for summer / fall 2017 for laboratories and water systems.