For the week of Dec. 23: LCRA ELS will be closed Dec. 24 and 25. Microbiological samples will only be accepted Dec. 26. All courier services will be conducted on Dec. 26 at routinely scheduled times. See the schedule for the week of Dec. 30.
LCRA Environmental Laboratory Services
A NELAP laboratory providing quality testing to safeguard public health and ensure regulatory compliance.
EPA UCMR 5
Sampling is scheduled to begin in January 2023 and continue through December 2025.
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
- Obtain your schedule from the EPA or contact LCRA ELS for help with your schedule.
- Request a quote and include schedule attachments, if applicable.
- Sign and return quote to LCRA ELS.
- 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.
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