PlainWater
Counties → Oregon

Clackamas County, Oregon

Water Systems
231
Population Served
385,530
Total Violations
18,114
1,923 health-based
PFAS Detected
5
of 15 tested

Violation Analysis

97.4%
Systems with Violations
78.4
Avg Violations per System
10.6%
Health-Based Violations

Water Source Types

GW
33 systems (14%)
SW
17 systems (7%)

PFAS Contamination

15
Systems Tested
5
PFAS Detected
33.3%
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

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

No violations on record (2) One or more violations (48)

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
Sunrise Water Authority 50,003 7 Detected
Lake Oswego Municipal Water 40,000 39 Clean
Oregon City 33,940 0 Clean
Oak Lodge Water Services 30,000 2 Clean
Clackamas River Water 29,918 85 Clean
West Linn, City Of 28,000 4 Clean
Wilsonville, City Of 25,915 44 Clean
Milwaukie, City Of 20,946 265 Detected
Clackamas River Water - Clairmont 19,928 23 Clean
Canby Utility 18,754 57 Clean
Sandy, City Of 12,991 347 Clean
Gladstone, City Of 12,121 63 Clean
Molalla, City Of 10,298 38 Detected
Estacada, City Of 5,750 291 Detected
Rivergrove Water District 4,000 64 Clean
Lake Grove Water District 3,100 42 -
Boring Water District No 24 2,500 237 -
Colton Water District 1,500 474 -
Salmon Valley Water Company 1,500 34 -
Usfs Timberline Lodge 1 1,500 353 -
Athey Creek Church 1,000 3 -
Rhododendron Wtr Assoc 980 361 -
Southwood Park Water District 900 22 -
Oprd Milo McIver State Park 850 34 -
Timberline Rim Water Co Inc 800 45 -
Mulino Water District 700 40 -
Riverbend Mobile Home Park 600 168 -
Stafford Elementary 600 83 -
Barton Food Mart 570 17 -
Big Valley Woods Water Corp 550 142 -
Usfs Trillium Lake Cg 500 18 -
Usfs Hoodview Pine Pt 500 6 -
Meadowbrook Grocery 500 46 -
Space Age Sandy 500 0 -
Ninety-One Elem SD 91 450 220 -
Oregon Trail SD - Kelso Elem 450 29 -
Carus Elementary 415 93 -
Pioneer Mobile Home Park 400 120 -
Riverview Mfgd Home Court 400 131 -
Clackamas Co Pks-Metzler Pk #1 400 44 -
Oregon Trail SD - Boring Mid Sch 400 177 -
Clackamas Co Pks-Metzler Pk #2 400 24 -
Country Christian School 400 42 -
Butte Creek Elementary SD 67J 326 23 -
Kelso Water Assn 300 60 -
Glenmorrie Cooperative Assn 300 20 -
Alder Creek Barlow Water Dist 300 83 -
Eagle Crest Mobile Home Park 300 41 -
Clackamas Co Pks-Barton Park 300 40 -
Oregon Trail SD - Cottrell Elem 300 51 -

Other Counties in Oregon

Multnomah County
57 systems · 854,646 served · 4,422 violations
Washington County
96 systems · 597,244 served · 7,314 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 Clackamas County? ▼
Clackamas County has 18,114 total drinking water violations across 231 water systems, of which 1,923 are health-based violations. 97.4% of systems have at least one violation.
How many people get water from Clackamas County systems? ▼
Water systems in Clackamas County serve approximately 385,530 people through 231 public water systems.
Has PFAS been detected in Clackamas County water? ▼
Of 15 water systems tested for PFAS in Clackamas County, 5 had PFAS detected (33.3% detection rate).
What types of water sources supply Clackamas County? ▼
Water systems in Clackamas County use GW (33 systems), SW (17 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. 10.6% of Clackamas 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.