Water report · not indexed
What is in the water at 97231
One public water system serves this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
PORTLAND WATER BUREAU
PWSID OR4100657 · OR · serves 666,200 people
PFAS and lithium
Sampled, nothing detected. Tested for 30 compounds under UCMR 5 with none found at or above its reporting limit. A reporting limit is the lowest concentration the method can measure, so this means “below that” rather than “zero”.
Health-based violations
1 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- TT · contaminant code 0800 · began 2017-12-18
Hardness
Median hardness 85 mg/L as CaCO₃, measured at 8 stations serving this system across 63 results, 2015-04-13 to 2024-11-13. Measured in the water source and distribution area, not at a tap, and not in your home.
What this report cannot tell you
Every figure describes water at a sampling point: a treatment plant, an entry point to the distribution system, or a monitoring station. None of it describes water arriving at your tap. Plumbing between the two can add lead and copper, and if your home was built before 1986 a test kit tells you something no federal dataset can.
Sources: EPA UCMR 5 occurrence (final release, frozen July 2026) · EPA SDWIS health-based violations · USGS and state monitoring via the Water Quality Portal · EPA Public Water System Service Area Boundaries v3. Compiled 2026-09-01.