PFAS Analyte · UCMR 5
9Cl-PF3ONS
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid
CAS 756426-58-1· UCMR 5· No individual MCL set
6,157
Systems monitored
with official records
0
Systems with detections
0.0% detection rate
0
Detected samples
of 39,160 total samples
Jan 2023 – Dec 2025
Monitoring period
per UCMR 5 schedule
Detection Rate — 9Cl-PF3ONS
Systems with any detection0.0%
0 of 6,157 monitored systems
Sample-level detection rate0.0%
0 detections across 39,160 total samples
No detections above MRL in dataset
No official UCMR 5 records for 9Cl-PF3ONS show a result above the minimum reporting limit. This does not establish that 9Cl-PF3ONS is absent — it means no qualifying detection was reported.
All records are from official EPA UCMR 5 monitoring data. Detection counts reflect the number of samples where the analyte was reported above the minimum reporting limit (MRL). They are not compliance determinations and do not imply a health violation.
9Cl-PF3ONS at a Glance
Full Name9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid
CAS Number756426-58-1
UCMR RoundUCMR 5
EPA MCLSee mixture rule
Systems Monitored6,157
Systems Detected0
Detection Rate0.0%
Note
No MCL as of April 2024.