Lead In Drinking Water In Oregon
What residents of Oregon need to know about lead in drinking water — including how it enters water, which utilities have documented violations, and what steps to take.
Source: EPA SDWIS, Oregon Health Authority — Drinking Water Services (OHA DWS), CDC · Last reviewed: 2025-01-01
Quick Answer
Is lead in drinking water a real concern in Oregon?
Yes — Portland has a documented history of lead in drinking water related to its naturally very soft, low-alkalinity Bull Run water supply, which is among the most corrosive large-city water sources in the western U.S.
Is this mostly a public-water issue, a private-well issue, or both?
Both public water service lines and household plumbing; Portland's soft water chemistry amplifies lead leaching from any lead-bearing material in the distribution and household plumbing systems.
What is the main reason residents should care?
Portland's Bull Run water supply is drawn from a protected watershed in the Mount Hood National Forest. The water is naturally very soft and low-mineral — highly corrosive to lead-bearing plumbing. Portland has required and implemented enhanced corrosion control since the 1990s, but older homes on lead service lines and with lead solder remain at risk.
Key Facts
| Federal Lead Action Level | 15 µg/L — no safe level per CDC |
| Bull Run water chemistry | Naturally very soft and low-mineral — among the most corrosive sources for a major western US city |
| Portland history | Documented lead elevation in 1990s led to enhanced corrosion control requirements |
| Corrosion control | Portland Water Bureau applies orthophosphate — reduces leaching but does not eliminate risk from household plumbing |
| State oversight | Oregon Health Authority — Drinking Water Services (OHA DWS) |
Why This Matters in Oregon
Portland's drinking water comes primarily from the Bull Run watershed — protected surface water that is naturally very pure but also very soft and low-mineral. This water chemistry, lacking the natural buffering that harder water provides, is inherently more corrosive toward lead plumbing materials. Portland Water Bureau has required orthophosphate corrosion control and has been conducting lead service line replacement, but Portland's significant inventory of older homes — in neighborhoods like Buckman, Woodstock, Sellwood, North Portland, and Albina — includes both lead service lines and lead solder at pipe joints. Oregon Health Authority enforces the Lead and Copper Rule statewide. Eugene and Salem have older housing in their city cores as well.
Historical Context
Portland's lead-in-water issue was brought into public view in the 1990s when testing revealed elevated lead levels linked to the city's corrosive water supply. This led to one of the earlier orthophosphate corrosion control programs among major western U.S. cities and ongoing lead service line replacement work.
Oregon Utilities With Lead Violation Records
The utilities listed below have at least one lead violation on record in EPA's SDWIS database. Violations may be open or resolved — see individual utility pages for current status and risk level.
Medford Water Commission
Oregon · 106,068 served
City of Beaverton
Oregon · 88,045 served
Rockwood Pud
Oregon · 65,443 served
City of Corvallis
Oregon · 61,468 served
Klamath Falls Water Dept
Oregon · 40,475 served
Lake Oswego Municipal Water
Oregon · 40,000 served
Clackamas River Water
Oregon · 29,918 served
City of Woodburn
Oregon · 29,455 served
City of Newberg
Oregon · 25,138 served
City of Milwaukie
Oregon · 20,946 served
How Lead Gets Into Drinking Water
Lead service lines
The pipe connecting a home to the water main may be made of lead, especially in pre-1986 construction. Water sitting in these lines can accumulate lead before it reaches the tap.
Lead solder
Lead solder at pipe joints was banned for potable water systems in 1986. Homes built before that date — including significant portions of older Oregon cities — may still have lead solder throughout their plumbing.
Older brass fixtures
Faucets, valves, and fixtures with high lead content were common before the 2014 revision of 'lead-free' standards. Replacing older fixtures at kitchen and drinking taps can meaningfully reduce exposure.
Corrosive water chemistry
Soft, acidic, or low-alkalinity water dissolves lead from plumbing more readily. Utilities use orthophosphate and other corrosion control treatments, but household plumbing after the meter is not within their control.
Who Should Pay Closest Attention
Portland families with young children in older pre-1951 homes — particularly those who have not had their water tested — should install a certified NSF/ANSI 53 or 58 filter. Portland Water Bureau has historically offered free lead testing kits to customers in older homes.
Families with children under six
Pregnant residents
Households in homes built before 1986
Renters who cannot inspect building plumbing
Residents on a confirmed lead service line
Households that had plumbing work done recently (disturbances dislodge protective scale)
How to Check Your Situation in Oregon
- 1
Identify your water utility. Use the ZIP lookup below or browse the Oregon utility directory on this site.
- 2
Read your utility's page on this site to see its current risk level and any open lead violations.
- 3
Contact your utility and ask for your address-level service line material status. Under the federal Lead and Copper Rule Revisions (LCRR), utilities must maintain and provide this information.
- 4
Review your utility's most recent Consumer Confidence Report (CCR) — mailed annually or available on the utility's website.
- 5
Consider testing your tap water at a Oregon Health Authority — Drinking Water Services (OHA DWS)-certified lab. Your state health department or Oregon Health Authority — Drinking Water Services (OHA DWS) maintains a list of certified labs.
- 6
If you have young children or are pregnant, install a certified NSF/ANSI 53 or 58 filter at the kitchen tap as a precautionary measure.
Treatment Options
Boiling does not remove lead. Use a certified filter for drinking and cooking water.
NSF/ANSI Standard 53 — Activated Carbon Block
Under-sink or pitcher filters certified to Standard 53 are independently verified to reduce lead. Replace filters on the manufacturer's schedule — an overdue filter may not perform as certified.
NSF/ANSI Standard 58 — Reverse Osmosis
RO systems certified to Standard 58 remove 95–99% of lead and a broad range of contaminants. Requires under-sink installation. More comprehensive than Standard 53 for households with multiple contaminant concerns.
Flushing — temporary mitigation only
EPA recommends flushing the cold tap for 30 seconds to 2 minutes if water has sat in pipes for 6+ hours. Not a substitute for certified filtration or service line replacement.
Frequently Asked Questions
Related Pages
Lead — National Overview
All U.S. utilities with lead records
Oregon State Overview
All utilities and water quality data
Nitrate in Drinking Water
A separate but common concern
Reverse Osmosis Guide
Removes 95–99% of lead
Activated Carbon Filter Guide
NSF/ANSI 53 certified options
All Contaminants
Complete reference library
Data Sources & Provenance
All data on this page is sourced from official U.S. government or public datasets.
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