Fort Collins Utilities details 2025 drinking water results

Fort Collins Utilities has released its 2025 annual Drinking Water Quality Report, the city announced June 10.

The report includes water quality test results, information on how the city protects its drinking water and details on where the water comes from, according to the release. Federal regulations require public water systems to send water quality reports to customers before July each year.

In additional report information provided by the city, Utilities said it performed 14,615 water quality analyses on 3,203 samples in 2025. The report says chlorine met treatment requirements in 100% of samples tested in December 2025, fluoride averaged 0.6 mg/L, nitrate averaged 0.0 ppm, and the 90th percentile results for lead and copper were below standards.

The report also says testing for 29 PFAS compounds under the federal UCMR5 program and lithium found results below detection limits. Giardia was detected in combined source-water samples, while Cryptosporidium was not detected. The city said a first-quarter 2026 chlorine dioxide/chlorite report was filed two days late, which resulted in a non-health-based reporting violation.

The full report is available on the city’s water quality page.