How did the District find out that 1,4-dioxane was in the District’s groundwater sources?

In 2011, the EPA identified 1,4-dioxane as an emerging substance of concern as part of a periodic Superfund review. In response to the review, the District began testing for the presence of 1,4-dioxane in groundwater supplies. This is an unregulated substance, meaning there is no drinking water standard for this substance. The District’s water quality chemists conducted sampling to determine if this compound was present. Samples were collected and sent to an independent, certified laboratory. Test reports confirmed that 1,4-dioxane was detected in some samples. The District shared results with the Colorado Department of Public Health and Environment and Tri-County Health Department. Since the presence of 1,4-dioxane was found, the District completed additional sampling using EPA-approved methods.

Show All Answers

1. Is my drinking water safe?
2. Is this substance in my water?
3. What is a part per billion?
4. How did the District find out that 1,4-dioxane was in the District’s groundwater sources?
5. What is 1,4-dioxane?
6. What level of 1,4-dioxane is considered safe in drinking water?
7. What is the District doing now that it knows this substance is present in the water?
8. Does the District know the source of 1,4-dioxane?
9. How are the State and EPA working to address the source of 1,4-Dioxane in the District's drinking water supply?
10. How will the District keep customers informed about the occurrences of 1,4-Dioxane?
11. How can I contact the District to get more information on this topic?