Government Sampling of VOCs in Murray City Water System
The EPA's monitoring of the Murray City Water System, which supplies about 38,700 residents in Salt Lake County via groundwater sources, reports on several volatile organic compounds (VOCs). This survey, conducted from 2014 to 2015, found no detections above reporting levels for most VOCs tested. The only exception was HCFC-22, which was detected in some samples but at levels without a federal maximum contaminant level (MCL) established. This record reflects the overall system and does not specify individual household water conditions.
Which Volatile Organic Compounds Appear in This Record and Which Do Not
The 2014-2015 federal occurrence survey under the Unregulated Contaminant Monitoring Rule (UCMR3) tested for several solvent compounds in the Murray City Water System. Among them, 1,1-dichloroethane, chloromethane, bromomethane, halon 1011, and 1,3-butadiene were not detected above the respective reporting levels. Only HCFC-22 showed measurable presence, with detections ranging up to approximately 2.97 micrograms per liter (µg/L) or parts per billion (ppb). It's important to recognize that detected molecules indicate measurement, not necessarily a problem or violation.
How a Gasoline Release Differs From a Dry-Cleaning Release in What It Leaves in Groundwater
Understanding the potential source helps interpret VOC presence. Gasoline releases typically introduce a complex mix of hydrocarbons with different volatility and persistence compared to solvents used in dry cleaning, which often include chlorinated compounds. The Murray City Water System's VOC profile, with absent dry-cleaning solvents and low-level HCFC-22 detections, suggests distinct contamination patterns influenced by local industrial and environmental histories. This distinction guides homeowners on what compounds might be expected or unusual in their water.
The Order in Which to Rule Things Out, From Cheapest Check to Laboratory Test
Before considering detailed laboratory testing, homeowners can start by reviewing their water source type and any local municipal water quality reports. Because government records provide system-level data, the next step is an individual water test from a certified laboratory focusing on VOCs of concern, such as HCFC-22. Collecting samples following lab instructions ensures accurate concentration measurement in micrograms per liter (µg/L), which informs any necessary treatment decisions.
How Sample Depth, Well Depth, or Source Type Changes What a Reader Should Expect
VOCs' presence and concentrations can vary depending on groundwater depth and the well's nature. Deeper wells often access more protected aquifers, potentially less affected by surface contamination. The Murray City Water System relies on groundwater sources, but variability exists across different wells and locations. Understanding these factors helps in anticipating possible VOC levels and informs targeted testing strategies.
Why a Granular Activated Carbon Bed Is Sized for Contact Time Rather Than Flow Alone
Granular activated carbon (GAC) filters are effective for reducing VOCs like HCFC-22. Effective removal depends on the contact time between water and carbon, not solely on flow rate. Sufficient contact time allows adsorption of solvent compounds onto the carbon surface. Properly designed carbon beds ensure that VOC concentrations are reduced to levels that meet water quality expectations.
What a Certified Laboratory Test for This Constituent Reports and How to Read It
A certified laboratory test for VOCs reports concentrations usually in micrograms per liter (µg/L), equivalent to parts per billion (ppb). For HCFC-22 detected in the Murray City system, values in the reported range provide a reference point. Since no federal MCL exists for this compound, interpreting the result focuses on comparing it with typical detection ranges and evaluating any health risk information available from regulatory or scientific sources.
Homeowners concerned about VOCs in their water should order a comprehensive VOC test from a certified laboratory. The result will confirm the presence and concentration of specific volatile organics, such as HCFC-22. If concentrations fall within or below typical detection ranges reported for the Murray City Water System, treatment may be optional based on health considerations. For households seeking reduction of VOCs, the Autotrol VOCs & Industrial Chemicals Filter ships ready to configure and is designed specifically to address these solvent compounds effectively.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-03-27. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Murray City Water System (UTAH18024), UT: 210 results across 6 listed contaminants, 6 detections above the reporting level; no federal MCL for these UCMR-listed VOCs
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