City water profile
Find official utility reports, understand hardness, and check the water system serving your home in Portland, Oregon.
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.
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 |
City summary
Portland has 29 published ZIP profiles across Multnomah County. The regional-evidence median is 35 PPM. Its comparison-eligible median is 35 PPM versus 35 PPM statewide.
Among the 1 Oregoncities meeting the comparison standard, Portland ranks #1from highest to lowest. Across all 56 state ZIP profiles, available estimates run from 18.4to 42.6 PPM.
The 32.5–37.8 PPM range shows how much the available ZIP estimates vary within the city label.
Hardness distribution
29 of 29 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.
Evidence quality
Confidence labels
Observation window: Jun 23, 2020 to May 19, 2026.
ZIP directory
Open a ZIP for site-level provenance and measurements.
ZIP code
35.3 PPM
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ZIP code
35.3 PPM
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ZIP code
35.3 PPM
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ZIP code
35.3 PPM
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ZIP code
35.3 PPM
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ZIP code
36.3 PPM
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ZIP code
35.3 PPM
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ZIP code
35.3 PPM
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ZIP code
35.3 PPM
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ZIP code
35.3 PPM
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ZIP code
35.3 PPM
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ZIP code
35.3 PPM
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ZIP code
32.5 PPM
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ZIP code
36.3 PPM
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ZIP code
37.2 PPM
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ZIP code
35.3 PPM
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ZIP code
35.3 PPM
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ZIP code
32.5 PPM
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ZIP code
37.2 PPM
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ZIP code
35.3 PPM
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ZIP code
35.3 PPM
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ZIP code
37.8 PPM
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ZIP code
36.3 PPM
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ZIP code
32.5 PPM
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ZIP code
37.8 PPM
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ZIP code
37.8 PPM
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ZIP code
32.5 PPM
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ZIP code
32.5 PPM
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ZIP code
37.2 PPM
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Practical next steps
Continue comparing
Banks
Washington County
35 PPM median
Lake Oswego
Clackamas County
37 PPM median
Mcminnville
Yamhill County
37 PPM median
North Plains
Washington County
37 PPM median
Glide
Douglas County
32 PPM median
Elgin
Union County
31 PPM median
Questions people ask
Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.
Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.
Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.