Model score 0/88 from violations, PFAS profile, and monitoring signals — not a laboratory test of your faucet.
21 violation record(s) in the latest EPA SDWA quarterly snapshotPFAS above EPA MCL (UCMR5 regulated compounds)
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CONTAMINANTS — EPA UCMR5 MONITORING
Compound
Level (ppt)
EPA limit
Health guideline
Status
PFBA
15.6
—
Within / n/a
Unregulated (monitored)
PFOSregulated
14.1
4 ppt
Exceeds
Above health advisory
PFPeA
9.2
—
Within / n/a
Unregulated (monitored)
PFHxA
9.2
—
Within / n/a
Unregulated (monitored)
PFOAregulated
7.6
4 ppt
Exceeds
Above health advisory
PFHxSregulated
5.3
10 ppt
Within / n/a
MCL exceedance
PFHpA
5.0
—
Within / n/a
Unregulated (monitored)
PFBS
4.5
—
Within / n/a
Unregulated (monitored)
Source: EPA UCMR5 · ppt = parts per trillion · MCL = enforceable limit for regulated PFAS
VIOLATIONS HISTORY (FEDERAL SNAPSHOT)
EPA’s national SDWA quarterly files associate 21 violation-related records with this system in the same reporting quarter as the utility snapshot used on WaterCheckup. This is not a complete historical docket — see ECHO and SDWIS for full compliance context.
WHY THIS FOR JOHNSTON CO-WEST · Chosen for JOHNSTON CO-WEST because PFAS was detected at 15.6 ppt in UCMR5 — above the 4 ppt limit for some regulated compounds — and this system shows 21 violation record(s) in the latest federal snapshot. RO removes 99%+ of PFAS at the tap.
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