PlainWater
Counties → Oregon

Columbia County, Oregon

Water Systems
56
Population Served
40,231
Total Violations
9,494
720 health-based
PFAS Detected
1
of 2 tested

Violation Analysis

100.0%
Systems with Violations
169.5
Avg Violations per System
7.6%
Health-Based Violations

Water Source Types

GW
40 systems (71%)
SW
10 systems (18%)

PFAS Contamination

2
Systems Tested
1
PFAS Detected
50.0%
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

Columbia 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
St Helens, City Of 13,410 69 Detected
Scappoose, City Of 8,710 92 Clean
McNulty Water PUD 2,500 155 -
Clatskanie, City Of 2,188 21 -
Vernonia, City Of 2,100 250 -
Warren Water Association 2,050 39 -
Columbia City Mun Waterworks 1,995 81 -
City of Rainier 1,932 301 -
Rainier SD #13 950 114 -
Western Hills Mh Estates 375 147 -
Fishhawk Lake Reserve and Community 350 112 -
Quincy Water Association 300 165 -
Columbia Co Pks-Camp Wilkerson 200 20 -
Columbia Co Pks-Hudson/Parcher 200 24 -
Midland Water Association 160 444 -
Rainier OR Lds Church 150 6 -
Columbia Co Pks-Big Eddy 125 21 -
Columbia Acres Water Assoc 110 118 -
Deer Island Village MHP 100 185 -
Lost Creek Heights Wtr Assoc 100 93 -
Alston Corners-Assembly of God 100 24 -
Shell Star Mart 100 50 -
Scappoose Brew & Thru 100 24 -
Country Villa Mobile Estates 90 145 -
Deer View Cooperative 90 314 -
Deer Island Waterworks 90 311 -
Paradise Moorage 90 179 -
Alston Country Store 90 53 -
Rainier Congregation of Jw 90 11 -
Goble Water Association 85 158 -
Columbia Hills HOA 84 344 -
Tamarack Mobile Home Park 80 200 -
Olympic Forest Products 80 461 -
Prescott, City Of 70 530 -
Maple Terrace Mobile Home Park 70 31 -
Laurel Ridge MHP 70 473 -
Marshland Water Association 70 829 -
McCuddys Landing 70 103 -
Columbia River Nitrogen, LLC 65 65 -
Deer Island Heights WS 60 763 -
Cedar Tree Mobile Home Park 50 227 -
Valley of the Moon 46 23 -
J & M Mobile Home Park 45 400 -
Dikeside Moorage 45 276 -
Berndt Creek Water Corp 45 106 -
Columbia River PUD 45 80 -
Island Community LLC 41 110 -
Hogg Heaven MHP 40 108 -
Swedetown Water Assoc 40 110 -
Pge Beaver Generating Station 30 176 -

Other Counties in Oregon

Multnomah County
57 systems · 854,646 served · 4,422 violations
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

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Columbia County? ▼
Columbia County has 9,494 total drinking water violations across 56 water systems, of which 720 are health-based violations. 100.0% of systems have at least one violation.
How many people get water from Columbia County systems? ▼
Water systems in Columbia County serve approximately 40,231 people through 56 public water systems.
Has PFAS been detected in Columbia County water? ▼
Of 2 water systems tested for PFAS in Columbia County, 1 had PFAS detected (50.0% detection rate).
What types of water sources supply Columbia County? ▼
Water systems in Columbia 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. 7.6% of Columbia 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.