PlainWater
Counties → Arkansas

Johnson County, Arkansas

Water Systems
12
Population Served
31,064
Total Violations
333
65 health-based
PFAS Detected
0
of 4 tested

Violation Analysis

100.0%
Systems with Violations
27.8
Avg Violations per System
19.5%
Health-Based Violations

Water Source Types

SW
11 systems (92%)
GW
1 system (8%)

PFAS Contamination

4
Systems Tested
0
PFAS Detected
0.0%
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

Johnson Arkansas water systems by violation status, EPA SDWIS records.

No violations on record (0) One or more violations (12)

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
Clarksville Connected Utilities 9,410 8 Clean
Horsehead Water Association 5,792 7 Clean
East Johnson Co Water Assn 4,828 18 Clean
Watalula Water Ass0ciation 2,278 68 -
Knoxville Waterworks 2,087 12 -
Lamar Waterworks 1,885 52 -
Ludwig Water Association 1,610 24 -
Coal Hill Waterworks 1,372 41 -
Hartman Waterworks 1,230 27 Clean
Spadra-Goose Camp Water Assoc 517 38 -
Primo Wmsc0066 Clarksvill 30 18 -
Usfs Horsehead Bathhouse 25 20 -

Other Counties in Arkansas

Pulaski County
31 systems · 461,701 served · 900 violations
Benton County
58 systems · 374,691 served · 2,082 violations
Washington County
29 systems · 189,281 served · 647 violations
Sebastian County
21 systems · 127,973 served · 1,403 violations
Faulkner County
14 systems · 120,979 served · 560 violations
Greene County
7 systems · 119,804 served · 164 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Johnson County? ▼
Johnson County has 333 total drinking water violations across 12 water systems, of which 65 are health-based violations. 100.0% of systems have at least one violation.
How many people get water from Johnson County systems? ▼
Water systems in Johnson County serve approximately 31,064 people through 12 public water systems.
Has PFAS been detected in Johnson County water? ▼
Of 4 water systems tested for PFAS in Johnson County, 0 had PFAS detected (0.0% detection rate).
What types of water sources supply Johnson County? ▼
Water systems in Johnson County use SW (11 systems), GW (1 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. 19.5% of Johnson 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.