PlainWater
Counties → Ohio

Butler County, Ohio

Water Systems
22
Population Served
378,755
Total Violations
1,035
185 health-based
PFAS Detected
7
of 9 tested

Violation Analysis

81.8%
Systems with Violations
47.0
Avg Violations per System
17.9%
Health-Based Violations

Water Source Types

GW
19 systems (86%)
SW
3 systems (14%)

PFAS Contamination

9
Systems Tested
7
PFAS Detected
77.8%
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

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

No violations on record (4) One or more violations (18)

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
Butler Co. Water District 2 PWS 116,572 27 Detected
Hamilton Public Water System 62,447 63 Detected
Middletown City PWS 51,229 61 Detected
Fairfield City PWS 44,907 14 Detected
Southwest Regional Water District 42,856 0 Detected
Oxford City PWS 24,000 21 Detected
Monroe City PWS 15,600 114 Clean
Trenton City PWS 13,012 87 Detected
New Miami Village PWS 3,200 114 Clean
Catalina Mobile Home Park 1,280 35 -
Seven Mile Village PWS 1,000 11 -
Fort Hamilton Hospital PWS 950 8 -
Molson Coors USA LLC 550 8 -
Cincinnati Childrens Hospt Liberty PWS 313 0 -
Crouse Mobile Home Park & Sales, LLC 247 92 -
Advanced Drainage Systems- Butler 171 0 -
Linda Mobile Home Park PWS 166 230 -
AL Couch Super Market 100 16 -
Soul Winners Church 75 106 -
Naws Club LLC 30 0 -
Champion Camping Club PWS 25 27 -
Dollar General #16484 - Seven Mile PWS 25 1 -

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 Butler County? ▼
Butler County has 1,035 total drinking water violations across 22 water systems, of which 185 are health-based violations. 81.8% of systems have at least one violation.
How many people get water from Butler County systems? ▼
Water systems in Butler County serve approximately 378,755 people through 22 public water systems.
Has PFAS been detected in Butler County water? ▼
Of 9 water systems tested for PFAS in Butler County, 7 had PFAS detected (77.8% detection rate).
What types of water sources supply Butler County? ▼
Water systems in Butler County use GW (19 systems), SW (3 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. 17.9% of Butler 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.