PWSID
WA5313333
State
Washington
City
VANCOUVER
Population served
153,526
Primary source
Groundwater
Score history
▼ 66 points — the score moved from 100 to 34 on Jun 18, 2026, as newly published EPA data was incorporated.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
Latest detections from EPA’s UCMR5 monitoring (through Mar 2023). Levels in parts per trillion (ppt).
PFOS
Perfluorooctanesulfonic acid
8.4 ppt
limit 4 ppt
PFOA
Perfluorooctanoic acid
8 ppt
limit 4 ppt
PFHxS
Perfluorohexanesulfonic acid
5.3 ppt
limit 10 ppt
PFBS
4.1 ppt
limit —
PFHxA
3.3 ppt
limit —
Violations & enforcement
10
Violations on record
0
Unaddressed
0
Health-based
21
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Mar 2023. Official EPA record →
Recent enforcement actions
- State action · SOX Mar 2023
- State action · SOX Oct 2010
- State action · SOX Jan 2009
- State action · SOX Jan 2009
- State action · SOX Jan 2009
- State action · SOX Jan 2009
- State action · SOX Jan 2009
- State action · SOX Jan 2009
Area water-quality monitoring
Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.
Nitrate
1 station · latest Jul 2023
Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.
This profile is built from EPA public records for system WA5313333 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.