PlainWater
Counties → Washington

Clark County, Washington

Water Systems
72
Population Served
615,931
Total Violations
9,864
222 health-based
PFAS Detected
4
of 5 tested

Violation Analysis

93.1%
Systems with Violations
137.0
Avg Violations per System
2.3%
Health-Based Violations

Water Source Types

GW
50 systems (69%)

PFAS Contamination

5
Systems Tested
4
PFAS Detected
80.0%
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

Clark Washington 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
Vancouver City Of 373,047 49 Detected
Clark Public Utilities 116,876 69 Detected
Camas Municipal Water Sewer System 31,794 714 Detected
Battle Ground Water Dept City Of 29,974 911 -
Washougal City Of 21,441 335 Detected
Ridgefield Public Works 20,967 1,376 Clean
Yacolt 3,034 80 -
Battle Ground High and Lewisville E 2,835 15 -
Bi Zi Farms 1,328 4 -
Battle Ground State Park 1,290 22 -
Paradise Point State Park 1,114 23 -
Amboy Clark Public Utilities 991 30 -
Lewisville Park 875 12 -
Lake Merwin Campers Hideaway Sys 1 820 497 -
Larch Corrections Center 705 366 -
Washougal Motocross LLC 602 26 -
Club Green Meadows 545 5 -
Glenwood Little League 500 60 -
Vancouver Lake Park 500 6 -
Country Manor Mobile Home Park 450 23 -
Chelatchie Prairie General Store 407 12 -
Lake Merwin Campers Hideaway Sys 2 401 30 -
Vista del Rio Mobile Home Park 352 3,450 -
Harmony Sports 333 15 -
Port of Vancouver 317 32 -
Fargher Lake Grocery 275 31 -
Royal Ridges Retreat Lower Camp 257 12 -
Great Western Mobile Home Park 250 75 -
Oak Meadows Mobile Home Park 216 142 -
Woodland Mhc LLC 209 12 -
Green Mountain School 200 138 -
Currie Jd Youth Camp 200 3 -
Lake Merwin Campers Hideaway Sys 3 164 18 -
Alderbrook Park 150 16 -
Fern Prairie Market 135 9 -
Camp Hope 133 1 -
Bethany Vineyards 130 24 -
Fargher Lake Restaurant 121 3 -
Creekside Country Store 104 16 -
Clark County Saddle Club 103 21 -
Lucia Falls Park 102 2 -
Hillcrest Manor 100 32 -
Brookside 100 161 -
Mt St Helens National Volcanic Monu 95 32 -
Single Tree Acres 90 229 -
The Matson Building 81 24 -
Green Mountain Mobile Ranch 80 20 -
Cedar Creek SDA Church 80 24 -
Morning Meadows 75 7 -
Vanridge Mobile Home Park 71 257 -

Other Counties in Washington

King County
217 systems · 3,193,095 served · 20,636 violations
Pierce County
359 systems · 1,138,508 served · 14,826 violations
Snohomish County
170 systems · 947,238 served · 8,193 violations
Spokane County
164 systems · 621,798 served · 9,829 violations
Thurston County
322 systems · 395,780 served · 24,330 violations
Kitsap County
221 systems · 331,366 served · 12,667 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Clark County? ▼
Clark County has 9,864 total drinking water violations across 72 water systems, of which 222 are health-based violations. 93.1% of systems have at least one violation.
How many people get water from Clark County systems? ▼
Water systems in Clark County serve approximately 615,931 people through 72 public water systems.
Has PFAS been detected in Clark County water? ▼
Of 5 water systems tested for PFAS in Clark County, 4 had PFAS detected (80.0% detection rate).
What types of water sources supply Clark County? ▼
Water systems in Clark County use GW (50 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. 2.3% of Clark 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.