Background on Moses Lake Groundwater and Water Delivery
The City of Moses Lake public water system in Grant County, serving over 32,000 people, relies on groundwater sources. Water is distributed through a network of connections to homes, unaffected by individual plumbing until reaching the tap.
Why a Granular Activated Carbon Bed Is Sized for Contact Time Rather Than Flow Alone
Contact time determines the effectiveness of VOC capture in carbon filtration
Granular activated carbon removes volatile organic compounds (VOCs) by adsorbing them onto its surface. The duration water remains in contact with the carbon, not just the flow rate, controls how well compounds like 1,1-dichloroethane or MTBE are reduced.
Flow rate alone does not ensure VOC reduction efficiency
Faster flow means shorter contact time, which may reduce the carbon bed's ability to capture trace levels of solvent compounds and other volatile organics.
The Role of Plumbing Material and Age, Separate from the Source Water
Plumbing components can influence VOC presence at the tap
Plastic and older piping materials sometimes interact with or release volatile compounds, independent of groundwater quality. Checking home plumbing is important when addressing VOC concerns.
Water system record shows no detected VOCs above reporting limits
The Moses Lake system’s EPA UCMR3 monitoring (2013–2015) reported no detections above levels such as 0.03 µg/L for 1,1-dichloroethane or 5.0 µg/L for MTBE, indicating VOC presence below federal reporting thresholds in the water supply.
What Questions a Commercial or Industrial Operator Adds That a Household Does Not
Industrial users consider chemical manufacturing or spill histories
Commercial operators may investigate solvent compound sources related to past local activities or accidental releases affecting VOC levels more than typical residential users.
Households focus more on point-of-use filtration and water quality tests
Residential concerns center around equipment function and water testing to confirm VOC concentrations specific to their property.
Why Volatility Matters: Showering, Dishwashing and Inhalation Routes Versus Drinking
VOCs can vaporize during household water use, leading to inhalation exposure
Volatile organics, including bromomethane and HCFC-22, may enter indoor air through shower steam or dishwashing, making inhalation a relevant exposure route apart from drinking.
Ingestion is only one pathway for VOC exposure in residential water use
Considering multiple exposure routes helps better assess the need for water treatment beyond taste or odor concerns.
The Order in Which to Rule Things Out, From Cheapest Check to Laboratory Test
Start with system water quality records for baseline information
Review official public water system data, such as EPA UCMR3 results, to understand typical VOC levels measured in your area.
Check home plumbing materials and condition for potential VOC sources
Inspect piping and fixtures that could impact water chemistry independently of groundwater quality.
Conduct a laboratory test on your own water supply to determine actual VOC concentrations
Individual testing is necessary to determine household-specific VOC levels, as regional data does not represent every home’s water.
Evaluate water treatment equipment performance if VOCs are detected
If current treatment has failed to address VOCs adequately, consider products that specifically target volatile organic compounds.
Closing
For households experiencing VOC concerns due to ineffective equipment, the C-Series VOCs & Industrial Chemicals Filter ships ready to configure and is designed to reduce volatile organic compounds by ensuring proper contact time within a granular activated carbon bed. It offers a documented approach to address solvent compounds potentially present in residential water supplies like those in Moses Lake’s groundwater system, pending individual water testing results.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-11-10. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for City of Moses Lake (WA5356300), WA: 168 results across 7 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level