PlainWater
Counties → Oregon

Multnomah County, Oregon

Water Systems
57
Population Served
854,646
Total Violations
4,422
243 health-based
PFAS Detected
0
of 7 tested

Violation Analysis

100.0%
Systems with Violations
77.6
Avg Violations per System
5.5%
Health-Based Violations

Water Source Types

GW
40 systems (70%)
SW
10 systems (18%)

PFAS Contamination

7
Systems Tested
0
PFAS Detected
0.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Multnomah Oregon water systems by violation status, EPA SDWIS records.

No violations on record (0) One or more violations (50)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Portland Water Bureau 666,200 32 Clean
Gresham, City Of 73,932 24 Clean
Rockwood PUD 65,443 73 Clean
Troutdale, City Of 16,185 64 Clean
Fairview, City Of 9,963 106 Clean
Wood Village, City Of 4,388 126 Clean
Usfs Multnomah Falls/Wahkeena 3,200 30 -
Corbett Water District 2,954 146 Clean
Pleasant Home Water District 1,510 25 -
Palatine Hill Water District 1,500 21 -
Lusted Water District 1,200 34 -
Valley View Water District 1,034 19 -
Metro Parks - Oxbow 822 9 -
Pleasant Valley Elementary 650 117 -
Oprd Lewis & Clark State Park 400 34 -
Interlachen Water PUD 360 253 -
Sandy Boulevard Mobile Villa 350 72 -
Burlington Water District 340 21 -
Manna House Church 300 286 -
Usfs Eagle Creek Cg 255 22 -
Skyline Elementary SD 1J 250 76 -
Camp Collins YMCA 250 13 -
Townsend Farms Fairview 250 235 -
Lorna Water District 212 46 -
Clear Creek Church 200 10 -
Central Church of the Nazarene 200 55 -
Sauvie Island School 175 64 -
Sigler Cove Marina 150 246 -
Oprd Ainsworth State Park 150 51 -
Trout Creek Bible Camp 150 26 -
Rocky Pointe Marina 125 204 -
Coe Bonneville Dam 109 48 -
Mobile Village MHP LLC 100 133 -
Oprd Bridal Veil Falls St Park 100 18 -
Sauvie Island Moorage 96 413 -
Oprd Guy W Talbot Sp 90 27 -
Wild Wood Golf Course 82 5 -
Burnside Rocket 75 14 -
Plainview Grocery 75 11 -
The Pumpkin Patch 75 2 -
Topaz Farm 75 21 -
Wapato Moorage Association 74 14 -
Terrand Mobile Terrace 71 272 -
Columbia Airgas 55 13 -
Bailey Nursery Reeder RD Main 54 85 -
Reeder Beach Resort 50 29 -
Pleasant Valley Market 50 85 -
Club Paesano Cedarville Park 43 47 -
Bella Organic Farm 40 2 -
Latourell Falls Township 32 84 -

Other Counties in Oregon

Washington County
96 systems · 597,244 served · 7,314 violations
Clackamas County
231 systems · 385,530 served · 18,114 violations
Marion County
196 systems · 370,079 served · 19,281 violations
Lane County
237 systems · 327,688 served · 16,216 violations
Deschutes County
138 systems · 204,759 served · 5,986 violations
Jackson County
208 systems · 197,238 served · 12,362 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Multnomah County? ▼
Multnomah County has 4,422 total drinking water violations across 57 water systems, of which 243 are health-based violations. 100.0% of systems have at least one violation.
How many people get water from Multnomah County systems? ▼
Water systems in Multnomah County serve approximately 854,646 people through 57 public water systems.
Has PFAS been detected in Multnomah County water? ▼
Of 7 water systems tested for PFAS in Multnomah County, 0 had PFAS detected (0.0% detection rate).
What types of water sources supply Multnomah County? ▼
Water systems in Multnomah County use GW (40 systems), SW (10 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 5.5% of Multnomah County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.