laboratory flasks with clear liquid

​Water Quality Laboratory

The city of Thornton Water Quality laboratory is charged with ensuring that the city's drinking water meets all state and federal drinking water regulations. Thornton has a qualified staff of water utility professionals that understand the importance a water supply plays in the overall quality of life for its community. They are dedicated to providing customers with the best quality of water that is possible. The water quality laboratory provides water sampling, monitoring and testing using approved procedures and methods in accordance with all regulatory requirements.

Laboratory AnalystTreated water is collected and analyzed weekly at both Wes Brown and Thornton Treatment Plants and in the city of Thornton water distribution system. Raw water sources are also sampled and closely monitored to protect the quality of Thornton's drinking water. And, in addition to providing safe drinking water for Thornton's customers, the laboratory prepares and distributes an annual Water Quality Consumer Confidence Report and investigates water complaints.

If you have any questions or concerns about your tap water, please email WaterQuality@CityofThornton.net or call the Water Quality Line at 303-255-7770.

Update 2/27/19: The Wes Brown Water Treatment Plant is scheduled to come back online in March.  Customers may detect noticeable changes to aesthetic water quality parameters such as taste, odor and hardness as the water blends throughout the city. Both Wes Brown and Thornton Water Treatment Plants will operate simultaneously for approximately one month before the Thornton Water Treatment Plant is taken offline for a month of scheduled maintenance in April.  As the blend shifts to 100% Wes Brown Treatment Plant, another round of noticeable aesthetic water quality changes is anticipated.  Staff will make all efforts and adjustments necessary to minimize these water quality disruptions for our customers. Please be assured that during these transitions, your water will meet all state and federal safe drinking water standards.  Customers are encouraged to contact Water Quality if they have any questions or concerns.