Pentair VOCs & Industrial Chemicals Filter

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Why is a granular activated carbon bed sized for contact time rather than flow rate alone?

When treating volatile organic compounds (VOCs) such as 1,1-dichloroethane or chloromethane, the efficiency of removal does not depend solely on how quickly water passes through the filter. Instead, the time VOC molecules spend in contact with the granular activated carbon (GAC) bed is crucial. A longer contact time allows the activated carbon to adsorb more of the solvent compounds, improving water quality at the tap. Rapid flow may reduce contact time, which can lead to inadequate VOC removal even if the equipment is rated for a certain flow rate. This is why sizing a GAC bed takes into account contact time to maintain consistent reduction of volatile organics in household water supply.

Why does volatility matter beyond just drinking Sheridan’s water?

Volatile organic compounds are not only a concern through ingestion but also through inhalation and skin absorption. Activities common in residential settings such as showering or dishwashing release VOCs from water into the air where they can be inhaled. Because these compounds easily evaporate, their presence in water contributes to indoor air exposure. Contact through skin when bathing or washing can also be a route for VOC absorption. Hence, addressing VOCs in water benefits overall household exposure, not just what is consumed by drinking.

What does a certified laboratory test report for VOCs and how should Sheridan residents understand it?

Certified lab analysis for VOCs in residential water typically reports concentrations in micrograms per liter (µg/L) or parts per billion (ppb). For the City of Sheridan's public water system, government-monitored results from 2013 to 2015 show no detected concentrations above reporting levels across compounds like MTBE and HCFC-22. Understanding these lab reports means recognizing that a nondetection does not imply absence but indicates concentrations below the method's detection limits. To determine precise levels in your own household water, a specific lab test on that water is required.

What distinguishes VOC contamination from the two problems most often confused with it?

VOCs refer to a group of organic solvents that volatilize easily, differing from other common water issues such as total dissolved solids or microbial contamination. While high dissolved solids affect taste and corrosion potential, VOCs primarily concern chemical volatility and potential health exposure through multiple routes. Unlike aesthetic water issues or bacterial contamination, VOCs do not always influence water appearance, odor, or taste noticeably, making them less obvious without testing.

How does a gasoline release in groundwater differ from a dry-cleaning release in what it leaves behind?

Gasoline-related VOCs typically include compounds like benzene and MTBE, which are components of gasoline formulations. Dry-cleaning-related releases often involve chlorinated solvents such as 1,1-dichloroethane found in other industrial solvent uses. These sources leave different chemical fingerprints in groundwater, helping identify the contamination origin. While the City of Sheridan’s public water system monitoring shows nondetection for listed VOCs, understanding these distinctions helps in recognizing the types of solvent compounds that might be present if private well water is affected.

In what order should a Sheridan household rule out potential VOC concerns?

• Start with a basic evaluation of water taste and odor to suspect any unusual solvent-related issues.
• Review local public water records and monitoring data to understand regional VOC occurrence patterns.
• Consider conducting certified laboratory testing specifically for VOCs in your household water source.
• If VOCs are present and existing equipment performance is insufficient, look for treatment options optimized in contact time with granular activated carbon to target these compounds.

In summary, the public water system record for Sheridan, serving over 22,700 people, shows no detections of VOCs above reporting levels between 2013 and 2015 in surface water. This data highlights the system status but does not reveal individual household water conditions. For personalized assessments, certified testing of your water is necessary. For households whose current equipment cannot maintain desired VOC reduction, solutions such as the Pentair VOCs & Industrial Chemicals Filter, which operates on granular activated carbon technology sized for optimal contact time, provide an approach to managing solvent compounds effectively. For more detailed information, refer to the EPA’s Safe Drinking Water Information System records for the City of Sheridan.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2015-04-15. 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 Sheridan (WY5600052), WY: 55 results across 7 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level