UCMR 5 | LCRA UCMR 5 | LCRA


LCRA Environmental Laboratory Services

A NELAP laboratory providing quality testing to safeguard public health and ensure regulatory compliance.

LCRA Environmental Laboratory Services (ELS) is seeking approval for Round 5 of the EPA Unregulated Contaminant Monitoring Rule (UCMR 5) to perform all sampling and analysis in-house for any public water system in Texas or throughout the U.S. Sampling is scheduled to begin in January 2023 and continue through December 2025. Once posted, you can obtain your system sampling schedule and registered site locations directly from the EPA.

For more information, request a quote from LCRA ELS. LCRA will provide quotes for budgetary purposes but cannot accept signed quotes or perform any services until we receive approval for Round 5.

EPA approved methods

  • EPA 200.7 – Lithium
  • EPA 533 & 537.1 – Per- and Polyfluorinated Alky Substances

U.S. EPA Fifth Unregulated Contaminant Monitoring Rule

The 1996 Safe Drinking Water Act amendments require that once every five years the EPA issue a new list of no more than 30 unregulated contaminants to be monitored by public water systems.

The proposed fifth Unregulated Contaminant Monitoring Rule (UCMR 5) was published March 11, 2021. UCMR 5 requires monitoring for no more than 30 chemical contaminants between 2023 and 2025 using analytical methods developed by the EPA and consensus organizations. This monitoring provides a basis for future regulatory actions to protect public health. For a full list of required parameters to be tested, please visit the U.S. EPA UCMR 5 website.

Assessment monitoring

All public water systems (surface water or groundwater under the direct influence of surface water) serving more than 3,300 people are required to monitor for the above list of methods during a consecutive quarterly period from January 2023 through December 2025. The EPA will pay for all costs associated with the monitoring for 800 randomly selected public water systems that serve between 3,300-10,000 people.