PlainWater
Counties → Pennsylvania

Lancaster County, Pennsylvania

Water Systems
434
Population Served
406,457
Total Violations
39,193
4,267 health-based
PFAS Detected
20
of 21 tested

Violation Analysis

97.9%
Systems with Violations
90.3
Avg Violations per System
10.9%
Health-Based Violations

Water Source Types

GW
33 systems (8%)
SW
17 systems (4%)

PFAS Contamination

21
Systems Tested
20
PFAS Detected
95.2%
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

Lancaster Pennsylvania water systems by violation status, EPA SDWIS records.

No violations on record (0) One or more violations (50)

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
City of Lancaster 120,000 168 Detected
Columbia Water Co 25,200 199 Clean
Ephrata Area Joint Authority 24,500 182 Detected
East Hempfield Water Auth 20,988 63 Detected
Elizabethtown Area Water 19,000 405 Detected
Mt Joy Boro Auth 15,261 248 Detected
Lititz Boro 9,397 73 Detected
Warwick Twp Lititz Sys 8,561 130 Detected
Millersville Univ 7,950 669 Detected
Upper Leacock Township 7,734 192 Detected
East Cocalico Township 6,735 750 Detected
Manheim Area Water & Sewer Aut 6,701 194 Detected
East Petersburg Borough 6,215 107 Detected
New Holland Borough 5,500 221 Detected
West Earl Water Authority 4,327 99 Detected
Akron Borough 4,200 59 Detected
East Donegal 4,048 438 Detected
Denver Boro 3,861 101 Detected
Masonic Homes 3,707 230 Detected
Quarryville Boro 3,150 137 -
Strasburg Muni Water Auth 3,100 980 -
Northwestern Lancaster Co Auth 2,968 166 -
Warwick Twp Rothsville System 2,846 137 -
Mt Hope Est & Winery 2,500 452 Detected
West Cocalico Twp Water Auth 2,430 172 -
Shady Maple 2,100 354 -
Wawa #8025 Gap 2,000 61 -
Weaverland Valley Blue Ball 1,946 59 -
Conestoga Valley Senior High 1,900 160 -
Adamstown Borough 1,800 192 -
Wawa Store 158 1,750 7 -
Leacock Twp Mun Auth 1,640 24 -
Conewago Ind Park 1,600 293 -
Solanco High Sch 1,460 68 -
Manheim Auto Auction 1,426 1,125 Detected
Terre Hill Borough 1,295 219 -
Lancaster County Bible Church 1,254 38 -
Bainbridge Water Authority 1,200 136 -
Swift Middle Sch 1,200 61 -
Tyson Foods 1,144 122 -
Christiana Muni Water Auth 1,100 305 -
Bowmansville Travel Plaza 1,100 60 -
Urban Outfitters 1,001 140 -
Goods Store 900 16 -
Spring Gulch Resort Cpgrd 900 133 -
Landis Homes 850 194 -
New Holland Shopping Center 825 142 -
Windmill Family Restaurant 800 102 -
Cocalico Creek Cpgrd 800 37 -
Junction Center 775 24 -

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
York County
208 systems · 389,602 served · 25,528 violations
Berks County
493 systems · 382,268 served · 54,767 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Lancaster County? ▼
Lancaster County has 39,193 total drinking water violations across 434 water systems, of which 4,267 are health-based violations. 97.9% of systems have at least one violation.
How many people get water from Lancaster County systems? ▼
Water systems in Lancaster County serve approximately 406,457 people through 434 public water systems.
Has PFAS been detected in Lancaster County water? ▼
Of 21 water systems tested for PFAS in Lancaster County, 20 had PFAS detected (95.2% detection rate).
What types of water sources supply Lancaster County? ▼
Water systems in Lancaster County use GW (33 systems), SW (17 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. 10.9% of Lancaster 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.