What the EPA limit means
No federal limit
The EPA has not set an enforceable numeric limit for this contaminant.
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Health goal (MCLG) — the level with no known health effect. It is a goal, not a legal limit, and is often zero for carcinogens.
UCMR-5
Where these measurements come from. Hover the tag for the EPA programme and years.
Where 9Cl-PF3ONS was found
The water suppliers reporting the highest levels, worst first. For lead and copper that is the 90th-percentile result the action level is written against; for Six-Year Review data, the 95th percentile of each system's samples.
| Supplier | City | State | Level vs EPA limit |
|---|---|---|---|
| Ponca City Mun Water | Ponca City | OK | 0.0034 µg/L No EPA limit set |
Frequently asked questions about 9Cl-PF3ONS
What is 9Cl-PF3ONS in drinking water?
9Cl-PF3ONS is monitored in US public drinking water under EPA rules. Each supplier's result is reported to the EPA and published here with its source and period.
Does the EPA limit 9Cl-PF3ONS?
The EPA has not set a numeric Maximum Contaminant Level for 9Cl-PF3ONS. It is still measured and reported, so levels can be compared between suppliers.
How common is 9Cl-PF3ONS in US tap water?
Of the 9,676 water suppliers with results on file, 1 detected 9Cl-PF3ONS — 0% of those tested.