PFAS ("forever chemicals") · 2025
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) in City of San Jose - Evg/edv/coy, CA tap water
City of San Jose - Evg/edv/coy, CA's 2025 report shows 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Source water | 2.0823529411764703 NG/L | None set |
Highest single sample Source water | 21 NG/L | None set |
Verbatim from City of San Jose - Evg/edv/coy, CA's 2025 Consumer Confidence Report — source document ↗
About 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)
9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound.
Monitored under EPA rules as part of broad PFAS surveillance.
How City of San Jose - Evg/edv/coy, CA compares
Nearby systems also reporting 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS):
People also ask
+Is there 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) in City of San Jose - Evg/edv/coy, CA tap water?
Yes — City of San Jose - Evg/edv/coy, CA's 2025 Consumer Confidence Report lists 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) at 2.0823529411764703 NG/L. City of San Jose - Evg/edv/coy, CA's 2025 report shows 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) in drinking water?
The EPA has not set an enforceable federal limit for 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS). Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)?
9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound. Monitored under EPA rules as part of broad PFAS surveillance.
+Where does this 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) measurement come from?
This page reproduces the 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) entry from the 2025 Consumer Confidence Report published by the City of San Jose - Evg/edv/coy, CA water utility — the annual drinking-water report every U.S. utility is required by federal law to publish. The original source document is archived at /water/ca/san-jose-evg-edv-coy/2025/source.