PlainWater
Counties → Washington

Whatcom County, Washington

Water Systems
185
Population Served
258,702
Total Violations
11,873
1,486 health-based
PFAS Detected
1
of 10 tested

Violation Analysis

95.1%
Systems with Violations
64.2
Avg Violations per System
12.5%
Health-Based Violations

Water Source Types

GW
40 systems (22%)
SW
10 systems (5%)

PFAS Contamination

10
Systems Tested
1
PFAS Detected
10.0%
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

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

No violations on record (1) One or more violations (49)

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
Bellingham-Water Division City Of 139,912 18 Clean
Ferndale 19,305 20 Clean
Lynden Water Department 17,969 33 Clean
Lwwsd - South Shore Water System 10,028 107 Clean
Birch Bay Water & Sewer District 9,019 64 Clean
Blaine City Of 6,319 141 Clean
Everson City Of 3,788 45 Clean
Columbia Valley Water District 2,648 39 Clean
Nooksack Water Dept 2,427 32 -
Glacier Water District 2,383 14 -
Sandy Point Improvement Co 2,098 399 -
Deer Creek Water Assoc. 2,000 15 -
Glenhaven Lakes Club 1,780 18 -
Sumas Water Dept 1,740 77 -
Pole Road Water Association 1,545 116 -
Mt Baker Ski Area - White Salmon 1,501 2 -
Point Roberts Water District No 4 1,440 26 -
Whatcom County Water Dist #7 1,410 3 -
Whatcom County Water Dist #2 1,353 3 -
Nooksack Valley Water Association 1,343 16 -
Birch Bay Square Water Operation 915 40 -
Meridian School Complex 900 24 -
Newhalem Campground & Visitor Ctr 800 1 -
Whatcom County Water Dist 13 795 259 Clean
Mount Baker School District-Deming 700 27 -
Glen Community Association 623 43 -
Sumas Rural Water Association 612 80 -
Meadowbrook Water Association 579 36 -
Acme Water District No 18 568 35 -
Silver Lake Park - Main Campground 553 20 -
Old Settlers Water Association 540 39 -
Deming Water Assoc. 501 21 -
Mount Baker Water Association 500 202 -
Louie Joe Water Association 471 23 -
Delta Water Association 450 492 -
Panorama Point Campground 450 10 -
Skookum Chuck Water Association 415 304 -
Berthusen Road Water Association 409 22 -
Deming Log Show & RV 407 27 -
Colonial Creek Campground 407 0 -
Mt Baker Ski Area Heather Meadows 405 9 -
Grandview-Northgate Industrial Park 400 7 -
Kendall Elementary School 400 22 -
Northwest Water Assoc. Inc. 400 221 Detected
Whatcom Meadows 370 15 -
Custer Water Association 365 77 -
Lisecc 357 40 -
Bell Bay Jackson Water Association 350 26 -
Harmony Grade School 325 44 -
Phillips 66 Company 288 8 -

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 Whatcom County? ▼
Whatcom County has 11,873 total drinking water violations across 185 water systems, of which 1,486 are health-based violations. 95.1% of systems have at least one violation.
How many people get water from Whatcom County systems? ▼
Water systems in Whatcom County serve approximately 258,702 people through 185 public water systems.
Has PFAS been detected in Whatcom County water? ▼
Of 10 water systems tested for PFAS in Whatcom County, 1 had PFAS detected (10.0% detection rate).
What types of water sources supply Whatcom County? ▼
Water systems in Whatcom 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. 12.5% of Whatcom 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.