PlainWater
Counties → Pennsylvania

Mercer County, Pennsylvania

Water Systems
146
Population Served
98,473
Total Violations
18,095
1,393 health-based
PFAS Detected
4
of 5 tested

Violation Analysis

95.2%
Systems with Violations
123.9
Avg Violations per System
7.7%
Health-Based Violations

Water Source Types

GW
45 systems (31%)
SW
5 systems (3%)

PFAS Contamination

5
Systems Tested
4
PFAS Detected
80.0%
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 Pennsylvania 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
Aqua PA Shenango Valley WTP 48,000 39 Detected
Greenville Muni Water Auth 8,600 438 Clean
Grove City Boro Water Dept 7,871 143 Clean
Sharpsville Boro Water Co 5,029 412 Detected
Pine Twp Water Distr System 3,082 60 -
Reynolds Water Company 2,370 382 -
Buhl Community Water Company 2,227 79 -
Aqua PA Lake Latonka WTP 1,600 38 Clean
Sandy Lake Boro 1,100 151 -
St Paul Homes 1,000 437 -
Plantation Park 1,000 97 -
Stoneboro Water Works 956 205 -
Shenango River Lake 950 57 -
Vacationland Campground 725 49 -
Jamestown Boro Water Auth 680 334 -
South Pymatuning 641 431 -
Commodore Perry School 550 146 -
PA DOT Rest Area 17 500 9 -
PA DOT Rest Area 18 500 10 -
Adventure Bound Shenango 500 77 -
Forrest Brooke MHP 491 248 -
Fredonia Boro 443 333 -
RV Village 400 92 -
Custaloga Town Scout Camp 300 100 -
Mercer Grove City KOA 300 96 -
Cozy Oaks RV Resort 300 97 -
Burger King #11027 300 34 -
Grove City Country Club 250 30 -
Pine Grove Mobile Home Park 244 202 -
Adesa Mercer 225 136 -
Keystone Charter School 225 103 -
Camp Nazareth 200 46 -
Last Minit Mart Jamestown 200 48 -
Dollar Gen 8289 Stoneboro 200 0 -
Ilsco Extrusions 175 23 -
Greenville MHP 150 1,386 -
County Line Cafe 150 49 -
Brass Lantern 150 52 -
Liberty Township 138 3 -
Leesburg Water Association 125 63 -
Cool Springs Fitness 125 30 -
Pine Hill Golf Course 110 5 -
Ull Scream 100 8 -
Temple Grove Campground 100 51 -
Jughandle (The) 100 33 -
Rudys Restaurant 100 25 -
Clark House 100 38 -
Mercer Cnty Livestock Auction 100 120 -
James Stoner VFW Post 6233 100 139 -
Delaware Twp Mun Bldg 100 22 -

Other Counties in Pennsylvania

Allegheny County
69 systems · 2,014,752 served · 5,241 violations
Philadelphia County
6 systems · 1,601,175 served · 447 violations
Montgomery County
172 systems · 1,274,688 served · 36,032 violations
Bucks County
299 systems · 599,107 served · 59,577 violations
Lancaster County
434 systems · 406,457 served · 39,193 violations
York County
208 systems · 389,602 served · 25,528 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Mercer County? ▼
Mercer County has 18,095 total drinking water violations across 146 water systems, of which 1,393 are health-based violations. 95.2% of systems have at least one violation.
How many people get water from Mercer County systems? ▼
Water systems in Mercer County serve approximately 98,473 people through 146 public water systems.
Has PFAS been detected in Mercer County water? ▼
Of 5 water systems tested for PFAS in Mercer County, 4 had PFAS detected (80.0% detection rate).
What types of water sources supply Mercer County? ▼
Water systems in Mercer County use GW (45 systems), SW (5 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. 7.7% 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.