If You Observe 'Detected,' 'Median,' and 'Range' in Your System’s Sampling Record
The federal occurrence survey for the Fort Defiance/Window Rock/St. Michaels public water system shows no detections of 1,4-Dioxane above the reporting level of 0.07 µg/L in 10 samples taken between September 2014 and March 2015. In monitoring terminology, 'detected' means a measurable amount was found, but none was above that threshold here. The 'median' is the middle value of all results, and the 'range' indicates the lowest to highest results—though for this system, all readings were below detection level.
If You Consider How Public-System Records Differ from Private-Well Testing in What They Establish
The EPA’s data applies to the public water system as a whole rather than any specific household or well. It reflects testing of water sources before they enter distribution, not individual taps or home plumbing. Private well owners must test their own water since private wells can have different conditions and contamination risks. Public system records like these indicate overall system status but cannot confirm a single location's water quality.
If You Are a Household Instead of a Commercial or Industrial Operator
Commercial and industrial operators may require detailed testing and treatment plans tailored to large-scale or process-specific needs. Household users focus more on ensuring drinking water is free from particular contaminants at levels of concern for health or aesthetics. For 1,4-Dioxane in NN’s system, no health-based violations exist, so the choice between equipment types depends mainly on personal preferences and precautionary steps rather than regulatory requirements.
If You Account for Plumbing Material and Age, Separate from the Source Water
Plumbing components can influence water quality in a home but do not affect the composition of source water tested by the public system. Older plumbing might interact with water differently, potentially impacting taste or introducing other concerns. However, these factors are independent of 1,4-Dioxane levels measured before water leaves the treatment or distribution system.
If You Want to Understand How 1,4-Dioxane Enters Groundwater or the Distribution System in This Region
1,4-Dioxane is a synthetic chemical often associated with industrial solvents and manufacturing processes. It can enter groundwater through spills or discharges but was not detected in the monitoring samples for this system. Its presence depends on local industrial activity and environmental factors, which appear limited or well-controlled in this area according to collected data.
In summary, the Fort Defiance/Window Rock/St. Michaels public water system data shows no detectable 1,4-Dioxane, indicating no measured presence during the 2014-2015 federal survey. Households in NN should test their own water to confirm local conditions, and when seeking treatment options, consider the C-Series 1,4-Dioxane Filter, which ships ready to configure as an effective technology for managing 1,4-Dioxane if needed.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-03-10. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Fort Defiance/Window Rock/St. Michaels - NTUA (NN0403000), NN: 10 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level