PlainWater
Counties → Washington

Cowlitz County, Washington

Water Systems
76
Population Served
115,789
Total Violations
13,735
148 health-based
PFAS Detected
1
of 6 tested

Violation Analysis

90.8%
Systems with Violations
180.7
Avg Violations per System
1.1%
Health-Based Violations

Water Source Types

GW
42 systems (55%)
SW
8 systems (11%)

PFAS Contamination

6
Systems Tested
1
PFAS Detected
16.7%
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

Cowlitz Washington water systems by violation status, EPA SDWIS records.

No violations on record (5) One or more violations (45)

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
Longview Water Department 49,111 18 Clean
Kelso City Of 15,097 13 Clean
Beacon Hill Water & Sewer District 11,969 2 Clean
Woodland City Of 10,640 518 Detected
Kalama City Of 8,020 9 Clean
Castle Rock Municipal Water 4,367 126 Clean
Toutle River Rest Area Nb/Sb 3,590 27 -
Toutle Community Regional Water 2,904 17 -
Forest Learning Center 951 16 -
Cresap Bay Park and Campground 456 5 -
Carrolls Water Assn 449 238 -
Ryderwood Improvement & Service As 434 95 -
Speelyai Bay Park 395 3 -
Beaver Bay Campground 387 2 -
Lewis River RV Park 347 1,217 -
Lewis River Golf Course 300 3,259 -
Peterson Farms 290 547 -
Cougar Crest 290 36 -
Yale Village / Saddle Dam Park 281 0 -
Woodland Winter Race Track 260 7 -
Lone Fir Bar and Grill LLC 252 8 -
Walts Meats 251 326 -
Cougar Park and Campground 248 1 -
Columbia Riverfront RV Park 233 5 -
Kelso LDS Church 225 14 -
Davis Terrace Water Assn 222 16 -
Coldwater Science & Learning Center 221 12 -
Rose Valley Friends Church 212 1,004 -
Rose Valley School 211 22 -
Yale Park 204 3 -
Laestadian Lutheran Church 200 11 -
Beacon Hill East 190 0 -
Green Mountain Mill Weyerhaeuser 145 2 -
Camelot Subdivision 142 13 -
Sandwood Heights Subdivision 126 189 -
Castle Rock Travel Center 120 0 -
Havilah Retreat Center 106 5 -
Owl Creek 102 476 -
Woodland Kingdom Hall 94 20 -
Mulkey Meadows 1 93 12 -
Merwin Village/Park Ppl Co 92 218 -
Castle Rock Seventh Day Adv 80 12 -
High Ridge 73 15 -
Kid Valley Campground 71 0 -
Edgewater Mobile Estates 70 14 -
Kid Valley Store 70 6 -
Nineteen Mile House 67 3 -
Lewis River Salmon Hatchery 64 0 -
Cowlitz Family Health Center 61 22 -
Paradise Cove Resort & RV Park 59 5 -

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
Clark County
72 systems · 615,931 served · 9,864 violations
Thurston County
322 systems · 395,780 served · 24,330 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Cowlitz County? ▼
Cowlitz County has 13,735 total drinking water violations across 76 water systems, of which 148 are health-based violations. 90.8% of systems have at least one violation.
How many people get water from Cowlitz County systems? ▼
Water systems in Cowlitz County serve approximately 115,789 people through 76 public water systems.
Has PFAS been detected in Cowlitz County water? ▼
Of 6 water systems tested for PFAS in Cowlitz County, 1 had PFAS detected (16.7% detection rate).
What types of water sources supply Cowlitz County? ▼
Water systems in Cowlitz County use GW (42 systems), SW (8 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. 1.1% of Cowlitz 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.