The Authority’s Environmental Laboratory staff are available to consult on the technical aspects for new customers such as sampling procedures, analytical methodology, quality control procedures, regulatory requirements, well disinfection procedures, and other needs of our clients.
If you are a new customer, or if it’s been at least a year since your last sample, please complete the New Customer Setup-Update Form below.
Public Water Systems
The Microbial Reporting Form (MRF) is a TCEQ controlled document that’s required when reporting sample results to TCEQ for compliance with the Revised Total Coliform Rule (RTCR) and Ground Water Rule (GWR) only. A Microbial Reporting Form for Public Water Systems can be found here:
For assistance on how to complete the MRF, see the PWS guidelines below.
For more information on how the laboratory is required to evaluate your samples, see the lab guidelines below.
The laboratory sample acceptance criterion indicates the minimum conditions a sample must meet when received at the laboratory. Sample collection personnel are to use water-resistant ink, use appropriate sample containers, and adhere to holding times, and sample volume requirements. Deviations from the sample acceptance criterion will be noted on the Chain-of-Custody (COC) Form and the final report.
A Chain-of-Custody Form is required for all laboratory analyses. A fillable COC Form can be found here:
The laboratory documents the temperature of samples upon receipt. All samples (except
samples for Presence/Absence or metals only, or samples received within an hour of
collection), must be stored and transported on ice. If samples are not received on ice or
were received more than an hour after collection, the temperature deviation will be noted on the final report.
The laboratory also verifies and records the pH of all pH-preserved samples upon receipt. If samples are received outside of the required pH range, the laboratory will add additional preservatives to the sample prior to analysis, until it is within the correct pH range.
Monday – Friday
8:00 a.m. – 5:00 p.m.
Please use the laboratory/shipping & receiving entrance to the right of the main entrance when dropping off samples.
For more information contact:
2901 N John Redditt Drive
Lufkin, TX 75904
Phone (Main): 936-632-7795