The East Cherry Creek Valley Water and Sanitation District (WSD) in Arapahoe County, Colorado, serves over 66,000 people across 19,300 connections using surface water sources. EPA’s unregulated contaminant monitoring rule (UCMR3) data from 2013 to 2015 shows that 1,4-dioxane, also known as the cyclic ether or solvent stabilizer, was detected once in 22 samples at 0.072 micrograms per liter (µg/L), equivalent to parts per billion (ppb). This detected level is below the EPA’s cancer risk reference concentration of 0.35 µg/L for this substance, and there are no health-based violations reported in this public water system.
1. Why Activated Carbon and Boiling Are Ineffective for 1,4-Dioxane, and Which Methods Are Validated
Activated carbon filters do not significantly reduce cyclic ether concentrations due to its chemical properties
Boiling water does not remove the solvent stabilizer and may concentrate it
Proven technology capable of addressing 1,4-dioxane includes specialized filtration units designed for this compound
The C-Series 1,4-Dioxane Filter employs targeted technology to mitigate this cyclic ether from household water
2. Essential Information to Record Before Seeking Further Treatment Advice
Note the water system name: East Cherry Creek Valley WSD, CO0103035
Record the date and results of any recent laboratory tests specific to your home water
Specify if previous equipment designed to address 1,4-dioxane has failed, including make or model
Identify your household water use patterns to assess treatment capacity needs
3. Differences Between Public Water System Records and Private Well Testing
Public system data reflects average conditions over many locations, not individual taps
Detection in EPA data is a measurement, not a regulatory violation or safety finding
Private well analysis is required to know specific household water composition accurately
The EPA record reports one detection out of 22, indicating low concentration but no guarantee for every home
4. Maintenance Rhythm of the C-Series 1,4-Dioxane Filter in Plain Terms
The filter ships ready to configure at the point of use, not requiring specialized tradespeople
Routine cartridge replacement is necessary to maintain effective reduction of the solvent stabilizer
Monitoring water quality periodically ensures the filter continues to address 1,4-dioxane levels effectively
User manuals provide guidance on service intervals based on household water consumption
5. Interpreting Median and Range from the East Cherry Creek Valley Water Record as a Homeowner
The median detected concentration of the cyclic ether in 2014 was 0.072 µg/L (ppb)
Only one sample registered a detection above the 0.07 µg/L reporting level, indicating rarity
Absence of detection in other samples suggests typical water is at or below the minimum reporting level
Home-specific testing is necessary to confirm your individual water status
6. Understanding Reverse Osmosis Rejection Rates and Their Limitations
Rejection rates express the percentage of a contaminant the unit can potentially block, not a guaranteed number
Performance varies with water chemistry, system condition, and operational factors
Reliance solely on rejection rates can overstate actual contaminant reduction experienced at tap
Combining technologies, such as the C-Series filter, with reverse osmosis can improve confidence in reducing the solvent stabilizer
In summary, the East Cherry Creek Valley Water System record for 1,4-dioxane in Arapahoe County shows a very low and infrequent presence of this cyclic ether solvent stabilizer in public water supplies, with no health-based violations reported. This data reflects conditions averaged across many households and does not substitute for private well or tap water testing for individual homes. If your current equipment designed to address 1,4-dioxane has failed, considering a specialized unit like the C-Series 1,4-Dioxane Filter that ships ready to configure can help manage this contaminant effectively. For further detail, the EPA’s public occurrence database offers comprehensive records on this system’s water quality.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-11-10. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for East Cherry Creek Valley WSD (CO0103035), CO: 22 results across 1 listed contaminants, 1 detections above the reporting level; no federal MCL; EPA cancer risk reference concentration 0.35 ug/L