Local water dashboard
Official source aggregationRegional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Multnomah County.
Your tap water
Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.
Hardness not yet transcribed
The official report is available below. Check its hardness table and the source or treatment zone serving you, or ask the utility for your result.
Read 2026 Drinking Water Quality Report ↗Source checked Sep 29, 2026.
At a glance
EPA quarter 2026Q2
Utility-reported hardness
Unavailable
Ask your provider or test your tap
All possible systems
Review needed
1 active health-based record
Measurements by utility
Each result belongs to a specific system.
Utility match
1 system
Serves 666,200 people system-wide
Match the name on your water bill
These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.
EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.
OR4100657 · Surface water · 666,200 people served system-wide
A municipal system, in-state city, and served county all agree with this Census ZCTA.
1 reported active health-based record(s) for this system
Read 2026 Drinking Water Quality Report ↗An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
EPA SDWIS Lead and Copper Rule samples
33% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
EPA SDWIS Lead and Copper Rule samples
138% of the listed benchmark
Monitoring period: Jan 1, 1992 to Jun 30, 1992
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Jul 1, 2022 to Jul 31, 2022 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | Unaddressed | Dec 18, 2017 |
Hardness meter
35.3
PPM as CaCO₃
Soft
PPM
35.3
GPG
2.1
Regional environmental evidence
USGS hardness classification scale
35.3 PPM
Parts per million
35.3
mg/L as CaCO₃ equivalent
Grains per gallon
2.1
1 GPG ≈ 17.1 PPM
How to use regional evidence
These samples describe nearby environmental water. They cannot establish whether your tap water is soft or hard. Use a utility result or a tap test for appliance settings and treatment sizing.
USGS sites used
13
Nearest site
3.6 mi
Observation range
Jun 23, 2020–May 19, 2026
Regional evidence confidence
High
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: WILLAMETTE RIVER AT PORTLAND, OR (Tidal stream).USGS source documentation ↗Evidence tier: Regional environmental evidence. This value is not used as proof of the serving utility's treated-water hardness.
Regional context
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Portland median
35 PPM
About the same29 indexed ZIP readings · Range 32.5–37.8 PPM
Oregon median
35 PPM
About the same45 indexed ZIP readings · Range 13.1–153.5 PPM
Evidence-first next steps
This profile can help you ask the right question. It cannot select equipment for a property without a current result from the serving utility or the tap.
ZIP boundaries and utility service areas do not perfectly match. Verify the system on a water bill before relying on system-wide records.
An active health-based record is present. Follow the utility's current notice and public-health instructions.
Read Portland Water Bureau’s report ↗Use a tap hardness test before sizing a softener. For health concerns, use a certified laboratory and the correct sampling protocol.
Convert your hardness test result →Nearby indexed reports
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
EPA ECHO reports 1 active health-based violation among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
Utility-reported hardness is unavailable in this index. Regional samples do not establish tap-water hardness. Ask your provider or test your tap.
Confirm hardness at your tap and consider actual scale or spotting before choosing treatment. Regional environmental values cannot determine whether you need a softener. A softener addresses hardness, not every contaminant.