Autotrol PFAS Forever Chemicals Filter

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This week, you need to decide how to approach the presence of PFAS chemicals in your household water, based on regional data and what it might mean for your family.

1. How to compare this area's record with a neighbouring county's without overreading it

Waterloo Water Works, serving over 69,000 people in Black Hawk County, uses groundwater as its source. Federal monitoring under the EPA's Unregulated Contaminant Monitoring Rule (UCMR5) has measured PFAS compounds in water from this system between early 2023 and late 2024. When comparing these results with neighboring counties, remember these are system-wide data, not individual household tests. Detecting a PFAS compound at or just above the reporting level in the system does not necessarily reflect your home's water quality. Differences in source water, treatment methods, and the number of samples collected can influence results, so avoid drawing direct conclusions about your tap water solely from county-wide data.

2. Why aesthetic secondary standards differ from health-based limits, applied to this constituent

PFAS substances include several chemicals like PFOA, PFOS, PFHxS, PFNA, and others. The EPA establishes federal maximum contaminant levels (MCLs) based on health considerations to guide water quality management. These limits are distinct from secondary standards that address taste, staining, or odor issues. For example, the federal MCL for PFOA and PFOS is 4.0 ng/L (nanograms per liter), and for PFHxS is 10 ng/L. Water system data from Waterloo Water Works shows no PFOA or PFOS detected above reporting levels, and only one PFHxS detection slightly above the health-based limit. Such findings indicate monitoring presence without necessarily representing a health violation or an unsafe condition. Understanding this distinction helps avoid unnecessary concern about aesthetic variations that do not impact safety.

3. What happens when this problem is left untreated for years, stated without exaggeration

PFAS are persistent chemicals that do not easily break down in the environment or the human body. If present in household water over many years, accompanied by consistent exposure, some health agencies identify potential risks related to long-term ingestion. However, given Waterloo Water Works' water system record with mostly non-detected or very low PFAS detections, the potential for high exposure is limited. Still, without steps to reduce PFAS in tap water where detected, there is the possibility of gradual accumulation in the environment and within households. It is important to balance concern with verified data and consider personal water testing before drawing conclusions on long-term impact.

4. How sample depth, well depth or source type changes what a reader should expect

Waterloo Water Works relies on groundwater sources, which can vary in PFAS content based on geologic features, proximity to contamination sites, and source depth. The system’s multiple wells and sampling points provide a composite picture across the service area. Deeper wells may show different PFAS profiles compared to shallow ones, and seasonal variations can influence concentrations. Residential users should keep in mind that their specific well depth and location could mean actual PFAS levels differ from the public system average. Obtaining an individual water test is the only way to establish current PFAS levels at your tap.

5. How the constituent enters groundwater or the distribution system in this region

PFAS chemicals have been widely used in industrial applications, firefighting foams, and consumer products. In Black Hawk County, these substances can enter groundwater through historic or ongoing releases, leaching from contaminated sites, or migration through soil into aquifers. Once in groundwater, PFAS can enter municipal water systems like Waterloo Water Works’ supply wells. Distribution systems generally do not generate PFAS but transport treated water to customers. Understanding the source pathways helps residents realize why some PFAS may be present and the importance of monitoring to inform water management decisions.

To address PFAS presence in household water, the Autotrol PFAS Forever Chemicals Filter offers a documented solution. This system ships ready to configure and can reduce specific PFAS compounds after you have measured your household’s water demand to select the appropriate capacity. Testing your own water is essential to make informed choices and ensure your family’s drinking water meets your expectations for safety and quality.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2024-09-23. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR5 monitoring (2023-2025) for WATERLOO WATER WORKS (IA0790074), IA: 180 results across 10 listed contaminants, 9 detections above the reporting level; 1 results above a 2024 federal MCL