How Many Samples and Wells Stand Behind the Figures, and What a Small Sample Means
The federal Unregulated Contaminant Monitoring Rule (UCMR5) program measured PFAS levels in the Saint Regis Mohawk Tribe public water system serving the 02 area. This water system submitted four samples between January and November 2025. The findings cover multiple PFAS compounds but represent a limited number of samples from system sources, not individual homes. Because only a few samples were taken, these results provide a snapshot rather than a comprehensive profile of all water sources or household taps in the area.
The Role of Plumbing Material and Age, Separate from the Source Water
The government record focuses on water as it leaves the water system’s treatment or source points, not the effects of household plumbing. Materials such as older pipes or fixtures could influence PFAS presence differently from the raw or treated water reported here. Home plumbing components do not appear in these system-level results, so individual household water testing is necessary to determine the contribution of plumbing to PFAS measurements at the tap.
How Seasonal or Multi-Year Variation Shows in the Record (Dates and Ranges Given)
The sampling for the Saint Regis Mohawk Tribe water system took place over nearly one year, from early January to mid-November 2025. This timeframe allows observation across seasons but is still a short window within longer-term variations. Consistent nondetects in this period suggest stable PFAS levels below reporting limits, yet monitoring over multiple years would be needed to confirm long-term stability or detect changes related to environmental or operational factors.
A Worked Example: Reading the Record's Median and Range as a Homeowner Would
In this system's data, none of the four samples detected PFAS compounds above the reporting limits. For example, PFOA and PFOS were not detected above 0.004 micrograms per liter in any sample. Since federal health-based maximum contaminant levels (MCLs) for these substances will be 4.0 nanograms per liter (ng/L) in 2024, these nondetect results indicate the system’s PFAS concentrations remain below those thresholds. For a resident, this means the system water tested shows no PFAS presence at or above levels set for health considerations, though private testing is needed to confirm their home's actual water quality.
How Public-System Records Differ from Private-Well Testing in What They Establish
Public water system results represent average treatment and source water conditions across all customers served by the system. They do not provide individual household results, which can vary due to plumbing, localized contamination, or water usage patterns. Private well owners must rely on their own well-specific testing since federal public water system monitoring doesn’t apply to private supplies. For households connected to this public system, the results provide a baseline but not a definitive statement about their tap water.
How the Treated Water Differs at the Tap Once the Documented Technology Is in Place
When existing household water treatment equipment struggles to manage PFAS or maintain efficiency under changing demand, adding the Autotrol PFAS Forever Chemicals Filter can address these challenges. This filter system uses technology specifically documented to reduce PFAS compounds in residential settings. It ships ready to configure with household plumbing, providing an additional layer of treatment beyond municipal supply capabilities. Homeowners noticing their existing system cannot keep up may find this equipment enhances PFAS reduction and supports their household’s water quality goals.
The Saint Regis Mohawk Tribe system’s federal monitoring shows no detected PFAS above reporting limits, a positive indicator of source water quality in the 02 area. However, PFAS can still accumulate or vary inside household plumbing and equipment under daily use. Testing your own water and considering the Autotrol PFAS Forever Chemicals Filter offers a practical next step for households seeking consistent PFAS management tailored to their water demand and conditions.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2025-11-19. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR5 monitoring (2023-2025) for SAINT REGIS MOHAWK TRIBE (020000005), 02: 40 results across 10 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level