PlainWater
Counties → Washington

Benton County, Washington

Water Systems
113
Population Served
281,453
Total Violations
10,713
861 health-based
PFAS Detected
5
of 6 tested

Violation Analysis

82.3%
Systems with Violations
94.8
Avg Violations per System
8.0%
Health-Based Violations

Water Source Types

GW
41 systems (36%)
SW
9 systems (8%)

PFAS Contamination

6
Systems Tested
5
PFAS Detected
83.3%
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

Benton 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
Kennewick City Of 114,468 7 Detected
Richland City Of 106,248 45 Detected
West Richland City Of 18,280 63 Clean
Energy Dept Of/200W 6,351 15 Clean
Prosser City Of 6,211 19 Clean
Benton City Water 5,626 74 Detected
Badger Mountain Irrigation District 2,331 99 -
Summit View Water System 1,869 72 -
Columbia Generating Station 1,632 91 -
Bc Water Co 1,262 29 -
Community Sewer and Water District 1,200 150 -
General Store 1,006 30 -
Vernita Rest Area 1 991 2 -
Finley School District #53 990 19 -
Energy Dept of/300 Area 600 10 -
Oasis Water Corporation 556 60 -
Great Basin Water Kiona 520 225 -
Benton County Two Rivers Park 474 17 -
Finley Elementary School (New) 450 33 -
Zirkle - Paterson Ranch 374 0 -
Canyon Village Water System Inc 310 263 -
Homestead Manufactured Housing 300 130 -
Tri-City Water District #45 300 357 -
Lineage Logistics 290 11 -
Plymouth Water District 288 633 -
Whitstran Elementary School 280 40 -
Lamb Weston - Paterson 250 821 -
Metz Community & RV LLC 245 77 -
Plymouth Day Use 242 3 -
Energy Dept Of/100K 235 16 -
Wilgus Housing Water System 220 51 -
Smwe - Columbia Crest Winery 218 153 -
Wsu Iarec - Prosser 218 6 -
Bookwalter Winery 207 17 -
Red Mountain Water Association 200 454 -
Welchs 180 6 -
Southgate Water Company 175 59 -
Hartley Brent 143 8 -
Paterson Elementary School 142 1,195 -
Crow Butte Park 141 10 -
Zirkle - Four Feathers Ranch 133 3 -
Wyckoff Farms 131 126 -
Finley Shopper The 125 17 -
Columbia Place LLC 125 235 -
Kiona Village Court 124 100 -
Rainbow Court 120 32 -
Hillview Mobile Community LLC 118 104 -
Zirkle Fruit - Paterson Ranch 112 6 -
Roza Heights Water Assn 110 140 -
ConAgra Foods Lamb Weston Inc-Farm 107 211 -

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 Benton County? ▼
Benton County has 10,713 total drinking water violations across 113 water systems, of which 861 are health-based violations. 82.3% of systems have at least one violation.
How many people get water from Benton County systems? ▼
Water systems in Benton County serve approximately 281,453 people through 113 public water systems.
Has PFAS been detected in Benton County water? ▼
Of 6 water systems tested for PFAS in Benton County, 5 had PFAS detected (83.3% detection rate).
What types of water sources supply Benton County? ▼
Water systems in Benton County use GW (41 systems), SW (9 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. 8.0% of Benton 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.