PlainWater
Counties → Ohio

Warren County, Ohio

Water Systems
21
Population Served
242,137
Total Violations
4,221
264 health-based
PFAS Detected
6
of 10 tested

Violation Analysis

95.2%
Systems with Violations
201.0
Avg Violations per System
6.3%
Health-Based Violations

Water Source Types

GW
17 systems (81%)
SW
4 systems (19%)

PFAS Contamination

10
Systems Tested
6
PFAS Detected
60.0%
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

Warren Ohio water systems by violation status, EPA SDWIS records.

No violations on record (1) One or more violations (20)

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
Warren County 78,299 153 Clean
Western Water Company 39,508 67 Detected
Kings Island PWS 31,753 104 Detected
Lebanon City 20,700 51 Detected
Springboro PWS 19,263 41 Detected
Franklin Public Water System 17,175 171 Detected
Warren Co. Socialville PWS 13,216 4 Detected
South Lebanon City PWS 6,541 100 Clean
Waynesville Village PWS 4,100 41 Clean
Lebanon Correctional Institution 3,410 88 Clean
Morrow Village PWS 3,360 84 -
Otterbein-Lebanon Retreat Center 1,541 113 -
Carlisle City PWS 1,475 62 -
Warren Co. Pennyroyal Area PWS 950 6 -
South Lebanon PWS No 2 180 0 -
Wayne MHP LP 175 227 -
Warren Co. Sharts Road PWS 145 17 -
Frontier Campground 100 1,580 -
Cookies Market 100 46 -
Caesars Village MHP PWS 90 349 -
Cedar Oaks Wellness Center 56 917 -

Other Counties in Ohio

Franklin County
96 systems · 1,503,985 served · 5,342 violations
Cuyahoga County
11 systems · 1,410,751 served · 1,166 violations
Hamilton County
28 systems · 842,267 served · 1,480 violations
Montgomery County
74 systems · 529,379 served · 4,724 violations
Summit County
214 systems · 467,695 served · 17,163 violations
Lucas County
46 systems · 433,198 served · 3,569 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Warren County? ▼
Warren County has 4,221 total drinking water violations across 21 water systems, of which 264 are health-based violations. 95.2% of systems have at least one violation.
How many people get water from Warren County systems? ▼
Water systems in Warren County serve approximately 242,137 people through 21 public water systems.
Has PFAS been detected in Warren County water? ▼
Of 10 water systems tested for PFAS in Warren County, 6 had PFAS detected (60.0% detection rate).
What types of water sources supply Warren County? ▼
Water systems in Warren County use GW (17 systems), SW (4 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. 6.3% of Warren 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.