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 ELS is approved 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.

Meet EPA requirements

  1. Obtain your schedule from the EPA or contact LCRA ELS for help with your schedule.
  2. Request a quote and include schedule attachments, if applicable.
  3. Sign and return quote to LCRA ELS.
  4. LCRA ELS will schedule your events, ship bottle kits or schedule sampling dates, analyze samples, deliver the final report to clients, and upload data to the EPA CDX database

For more information, contact LCRA ELS at [email protected] or 877-362-5272.

EPA-approved methods

  • EPA 200.7 – Lithium
  • EPA 533 & 537.1 – Per- and Polyfluorinated Alky Substances
See the list of contaminants, minimum reporting levels and methods.

Twenty-nine Per- and Polyfluoroalkyl Substances

Contaminant Chemical Abstract Service Registry Number (CASRN) Minimum Reporting Level Analytical Methods
11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) 763051-92-9 0.005 µg/L EPA Method 533
9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) 756426-58-1 0.002 µg/L EPA Method 533
4,8-dioxa-3H-perfluorononanoic acid (ADONA) 919005-14-4 0.003 µg/L EPA Method 533
hexafluoropropylene oxide dimer acid (HFPO DA) 13252-13-6 0.005 µg/L EPA Method 533
nonafluoro-3,6-dioxaheptanoic acid (NFDHA) 151772-58-6 0.02 µg/L EPA Method 533
perfluorobutanoic acid (PFBA) 375-22-4 0.005 µg/L EPA Method 533
perfluorobutanesulfonic acid (PFBS) 375-73-5 0.003 µg/L EPA Method 533
1H,1H, 2H, 2H-perfluorodecane sulfonic acid (8:2FTS) 39108-34-4 0.005 µg/L EPA Method 533
perfluorodecanoic acid (PFDA) 335-76-2 0.003 µg/L EPA Method 533
perfluorododecanoic acid (PFDoA) 307-55-1 0.003 µg/L EPA Method 533
perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) 113507-82-7 0.003 µg/L EPA Method 533
perfluoroheptanesulfonic acid (PFHpS) 375-92-8 0.003 µg/L EPA Method 533
perfluoroheptanoic acid (PFHpA) 375-85-9 0.003 µg/L EPA Method 533
1H,1H, 2H, 2H-perfluorohexane sulfonic acid (4:2FTS) 757124-72-4 0.003 µg/L EPA Method 533
perfluorohexanesulfonic acid (PFHxS) 355-46-4 0.003 µg/L EPA Method 533
perfluorohexanoic acid (PFHxA) 307-24-4 0.003 µg/L EPA Method 533
perfluoro-3-methoxypropanoic acid (PFMPA) 377-73-1 0.004 µg/L EPA Method 533
perfluoro-4-methoxybutanoic acid (PFMBA) 863090-89-5 0.003 µg/L EPA Method 533
perfluorononanoic acid (PFNA) 375-95-1 0.004 µg/L EPA Method 533
1H,1H, 2H, 2H-perfluorooctane sulfonic acid (6:2FTS) 27619-97-2 0.005 µg/L EPA Method 533
perfluorooctanesulfonic acid (PFOS) 1763-23-1 0.004 µg/L EPA Method 533
perfluorooctanoic acid (PFOA) 335-67-1 0.004 µg/L EPA Method 533
perfluoropentanoic acid (PFPeA) 2706-90-3 0.003 µg/L EPA Method 533
perfluoropentanesulfonic acid (PFPeS) 2706-91-4 0.004 µg/L EPA Method 533
perfluoroundecanoic acid (PFUnA) 2058-94-8 0.002 µg/L EPA Method 533
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) 2991-50-6 0.005 µg/L EPA Method 537.1
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) 2355-31-9 0.006 µg/L EPA Method 537.1
perfluorotetradecanoic acid (PFTA) 376-06-7 0.008 µg/L EPA Method 537.1
perfluorotridecanoic acid (PFTrDA) 72629-94-8 0.007 µg/L EPA Method 537.1

One Metal

Contaminant Chemical Abstract Service Registry Number (CASRN) Minimum Reporting Level Analytical Methods
lithium 7439-93-2 9 µg/L EPA Method 200.7; SM 3120 B (2017); SM 3120 B-99 (1999); ASTM D1976-20

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.

UCMR 5 was published Dec. 27, 2021, and requires monitoring for 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. Read more about U.S. EPA UCMR 5.

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. All sampling locations should be at entry points to the distribution system. The EPA will pay for all analytical costs associated with monitoring at systems that serve less than 10,000 people.