What PFAS Compounds in Cordova's Water Have Federal MCLs as of 2024?
In Cordova, Valdez-Cordova Census Area, the public water system record monitored several PFAS compounds under the latest federal guidelines. Among these substances, PFOA (perfluorooctanoic acid) and PFOS (perfluorooctane sulfonate) carry federal maximum contaminant levels (MCLs) set for 2024 at 4.0 nanograms per liter (or parts per trillion). Other compounds like PFHxS, PFNA, and HFPO-DA also have established federal MCLs ranging from 4.0 to 10 nanograms per liter. Some detected PFAS, such as PFBA, do not currently have a federal MCL but are measured for monitoring purposes.
How Does UCMR5 Sampling Differ from the Previous UCMR3 in Measuring PFAS?
The Unregulated Contaminant Monitoring Rule cycle 5 (UCMR5) expands upon UCMR3 by analyzing a broader range of PFAS compounds and using improved detection thresholds. UCMR5 includes compounds such as HFPO-DA and PFBS, which were not part of UCMR3's scope. The reporting levels in UCMR5 are typically lower, allowing detection of smaller concentrations, thus providing more detailed data on several fluorinated substances in the water supply.
What Do 'Detected,' 'Median,' and 'Range' Indicate in Cordova's PFAS Sampling Data?
'Detected' means that the sampling instruments measured the compound at or above a defined reporting level during testing. It does not signify a violation or confirm the water is unsafe. 'Median' refers to the middle value when all detected concentrations are arranged numerically and helps characterize typical levels among positives. 'Range' shows the lowest to highest detected values, illustrating variability in measurements across sampling events. For example, PFBA was detected once above the reporting level with a highest concentration of 0.0371 micrograms per liter, but this is below any federal MCL established.
How Can Cordova's PFAS Record be Compared to Neighboring Areas Without Overinterpretation?
When comparing PFAS data between regions, it is important to remember that sampling methods, timing, and water sources vary, affecting results. Cordova's public system uses surface water and has unique industrial and environmental contexts. Differences in which PFAS compounds are detected, their frequencies, or levels alone do not determine safety or risk for a particular residence. Such comparisons provide context but should not replace individual water testing for personal assurance.
What Information Does a Certified Laboratory Test Provide for PFAS in Household Water?
A certified laboratory test for household water reports specific concentrations of PFAS compounds present in the sample. This test identifies which fluorinated compounds exist in that individual water source, at exact levels measured in nanograms per liter (parts per trillion). It is the only way to know the precise PFAS profile in your household water because public system records represent the broader supply, not each individual connection.
How Does the Autotrol PFAS Forever Chemicals Filter Address These Compounds?
The Autotrol PFAS Forever Chemicals Filter uses specialized filtration technology designed to reduce a wide range of PFAS compounds, including those identified in Cordova's system. This type of filter captures and neutralizes 'forever chemicals' effectively, improving water quality where testing shows presence. It ships ready to configure, allowing homeowners to manage PFAS exposure by treating their water directly at the point of use or entry.
In summary, Cordova City's public water system records provide federal monitoring data on multiple PFAS compounds from 2024 testing, showing no measurements exceeding established federal MCLs. This record reflects system-wide surface water sampling for about 2,700 residents and does not report individual household water quality. For personal water concerns, certified laboratory testing is essential. The government source for these data is the EPA's Safe Drinking Water Information System and the UCMR5 monitoring program.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2024-12-30. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR5 monitoring (2023-2025) for CORDOVA CITY WATER (AK2293205), AK: 110 results across 10 listed contaminants, 1 detections above the reporting level; compared with the applicable federal MCL, none above