Contaminant · PFAS
11Cl-PF3OUdS in drinking water
A chlorinated polyfluoroether sulfonate (component of F-53B).
What the rules say
11Cl-PF3OUdS has no federal limit or EPA health reference value.
Read the EPA source for 11Cl-PF3OUdS.
Across the country
EPA tested 10,307 water systems for 11Cl-PF3OUdS and found it in 0. Half of the systems that found it measured less than —, and one in ten measured more than —.
EPA's final UCMR 5 occurrence file contains 66,362 11Cl-PF3OUdS results from 10,307 systems. 0 results were at or above the minimum reporting level, across 0 systems. Among detections, the median was — and the 90th percentile was —.
Systems with the highest recorded 11Cl-PF3OUdS results
No system in this dataset has a reported detection or exceedance for this contaminant.
Filters and testing
NSF/ANSI 58 (reverse osmosis)
A standard number by itself is not a contaminant claim. Check the product's current certification listing and performance data sheet for 11Cl-PF3OUdS or the specific contaminant you want to reduce. A utility-level record is not a test of your own faucet.