PlainWater
Counties → Washington

Lewis County, Washington

Water Systems
166
Population Served
88,839
Total Violations
15,450
482 health-based
PFAS Detected
1
of 2 tested

Violation Analysis

89.8%
Systems with Violations
93.1
Avg Violations per System
3.1%
Health-Based Violations

Water Source Types

GW
42 systems (25%)
SW
8 systems (5%)

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

Lewis Washington 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
Centralia Public Works - Water 28,164 10 Detected
Chehalis Water Department 11,426 42 Clean
Winlock City Of 3,502 237 -
Napavine City Of 3,095 57 -
Boistfort Valley 2,389 388 -
Morton City Of 2,147 52 -
White Pass Company Inc 2,066 128 -
Lewis Co Water Dist #2 1,983 2,344 -
Toledo Municipal 1,944 22 -
Hamilton AL 1,807 1,553 -
Ike Kinswa State Park 1,680 21 -
Mossyrock Public Utility City Of 1,553 52 -
High Valley Country Club 1,425 87 -
Western Forest Industries Museum 1,266 3 -
Lewis Co Water Dist #1 1,174 400 -
Vader-Enchanted Valley 985 57 -
Eagle Plaza Truck Stop 962 46 -
Miller 935 40 -
Pe Ell Town Of 859 434 -
Mossyrock Park Power House 832 16 -
Lewis Co Water Sewer Dist #6 740 33 -
Gee Cee S Truckstop 646 80 -
Lewis Co Water Dist #3 611 24 -
Lewis & Clark State Park 595 27 -
Newaukum Hill Water Assn 493 38 -
Chehalis Livestock Auction & Cafe 457 11 -
Bevin Lake Rest Area 443 9 -
Cispus Environmental Center 423 16 -
Paradise 414 20 -
Taidnapam Park 410 13 -
Marys Corner Market 409 29 -
Mustard Seed 405 28 -
Iron Creek 401 3 -
La Wis Wis Campground 401 7 -
Winlock High School 400 32 -
Timberline Village 628 378 10 -
Hillcrest Food Mart 360 18 -
Ritchie Brothers 328 0 -
Rainbow Falls State Park 321 31 -
Huff and Puff Drive IN 313 26 -
Cowlitz Food and Fuel 312 7 -
Paradise Estates Water Dept Inc 309 214 -
South Lewis County Regional Park 303 8 -
Schaefer County Park 301 21 -
Dashmesh Petroleum 284 49 -
Perry 277 56 -
Peking House 210 15 -
St Francis Xavier Mission 206 0 -
Blue Earth Farms 204 2 -
Transalta Centralia Generation 200 14 -

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 Lewis County? ▼
Lewis County has 15,450 total drinking water violations across 166 water systems, of which 482 are health-based violations. 89.8% of systems have at least one violation.
How many people get water from Lewis County systems? ▼
Water systems in Lewis County serve approximately 88,839 people through 166 public water systems.
Has PFAS been detected in Lewis County water? ▼
Of 2 water systems tested for PFAS in Lewis County, 1 had PFAS detected (50.0% detection rate).
What types of water sources supply Lewis County? ▼
Water systems in Lewis 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. 3.1% of Lewis 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.