laboratory flasks with clear liquid

Current Water Quality Report

This browser does not support PDFs. Please download the pdf to view it. Download PDF

Reporte de Calidad de Agua

This browser does not support PDFs. Please download the pdf to view it. Download PDF

​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.

Taste and odor of the water: The city is seeing an increase in algae growth in our water storage reservoirs. These algae can produce aesthetic taste and odor issues in the drinking water; customers may notice a musty or dirty flavor in the water.  While we are not currently experiencing a taste and odor event, it can occur at any time during the summer months. The city continuously monitors the raw water and makes necessary adjustments to the treatment process to minimize any disruption for our customers. The water remains safe to drink during these events, but it is understandable if you have lingering concerns.  You are encouraged to contact Water Quality for more information (updated 9/13/19).