PlainWater
Counties → Ohio

Mercer County, Ohio

Water Systems
77
Population Served
30,475
Total Violations
3,474
647 health-based
PFAS Detected
2
of 2 tested

Violation Analysis

89.6%
Systems with Violations
45.1
Avg Violations per System
18.6%
Health-Based Violations

Water Source Types

GW
49 systems (64%)
SW
1 system (1%)

PFAS Contamination

2
Systems Tested
2
PFAS Detected
100.0%
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

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

No violations on record (7) One or more violations (43)

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
Celina City 11,682 451 Detected
Coldwater Village 4,774 309 Clean
St Henry Village 2,596 85 -
Ft Recovery Village 1,501 94 -
Rockford Village 1,120 157 -
Mendon Village 628 19 -
Motor Inn Auto Truck Stop PWS 486 8 -
Chickasaw Village 358 34 -
Christ Chapel Church - Fort Recovery 354 0 -
Pax Machine Works 255 183 -
Buoys Bar & Grill 230 75 -
Fort Recovery Industries 220 39 -
Knights of Saint John 220 7 -
Lake Shore Resort 208 18 -
Zuma Thru/Sunset Laundry/Car Wash 208 46 -
Starlight Drive in Theater 200 33 -
Mt Tabor Church of God-Celina PWS 200 1 -
Hechts Landing - Campground I 195 7 -
Tsc Store 240 184 43 -
Gilbert Station Bar and Grill 175 48 -
Mercer Co Elks Club 2170 175 29 -
Behms Landing Restaurant 175 22 -
St Anthony Catholic Church 175 0 -
St. Teresa Catholic Church 170 8 -
St. Henry's Stop and Go 165 18 -
Kozy Kamp Ground 156 0 -
Dollar General Store - Celina #16694 150 0 -
Marion Township Park PWS 150 0 -
Saint Charles Center 142 91 -
Hechts Landing - Campground III 131 11 -
Lakeside Hideout 130 3 -
Duckfoot-Arnold Landing PWS 128 29 -
American Legion Post 345 127 11 -
Park Grand Resort 126 15 -
Hechts Landing - MHP 122 9 -
Korner Kafe - Maria Stein 120 25 -
Northmoor Golf LLC 107 24 -
Grand Lake Estates 103 263 -
Bayview Sun and Snow 102 19 -
VFW Post 5135 100 49 -
Cooper Farms Central Egg Processing 95 64 -
Hechts Landing - Campground II 86 0 -
Moeller Brew Barn 85 22 -
Streter's Chatt Bar 76 56 -
Shingle Shack Restaurant 75 0 -
Wendelin 2.0 75 63 -
Its It Landing 71 15 -
Wagon Wheel Nite Club 70 62 -
IN-Oh's Stateline Bar & Grill 62 28 -
Cottonwood Park 60 8 -

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 Mercer County? ▼
Mercer County has 3,474 total drinking water violations across 77 water systems, of which 647 are health-based violations. 89.6% of systems have at least one violation.
How many people get water from Mercer County systems? ▼
Water systems in Mercer County serve approximately 30,475 people through 77 public water systems.
Has PFAS been detected in Mercer County water? ▼
Of 2 water systems tested for PFAS in Mercer County, 2 had PFAS detected (100.0% detection rate).
What types of water sources supply Mercer County? ▼
Water systems in Mercer County use GW (49 systems), SW (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. 18.6% of Mercer 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.