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Laboratory Services


Update, Monday, April 6: In an effort to help minimize the spread of COVID-19, the Lewisville Environmental Control Services Laboratory is currently not accepting private water samples. Samples are still being accepted from public water systems. Sample acceptance hours have temporarily changed to Monday - Wednesday, 8 a.m. - noon. To facilitate your safety and ours, please schedule your drop-off in advance by phone with the Laboratory Staff, 972.219.3548.

image of employee in lab working

The Environmental Control Services Division supports the performance of the Water and Wastewater Divisions. They protect and preserve the environment by performing laboratory and process analyses.

The ECS Laboratory has a water and wastewater laboratory to serve the environmental needs of the City of Lewisville and its citizens. The laboratories perform over 70,000 analyses annually to ensure a safe drinking water supply and a clean environment for our customers.

Our water laboratory is NELAC accredited to analyze Total Coliform and E. Coli.  Tap or well water may be tested for bacteria by the laboratory for $27.50 per sample. Visit the ECS Laboratory at 897 Treatment Plant Road to obtain the required sample bottle, instructions, and paperwork. After collecting the sample, return it to the laboratory Monday - Thursday from 8 a.m. - noon only to be processed.  We do not accept samples after noon or on Friday.

For information regarding water quality, please see our most recent Water Quality Report or contact the laboratory at 972.219.3548.

    For questions or directions to the ECS Laboratory please call 972.219.3548 or send us an e-mail.

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