Public water system · OH2301012
ActiveLancaster City Pws
At a glance
Lancaster City Pws (PWSID OH2301012) is an active community water system in Fairfield County, Ohio. It reports serving 40,400 people through 15,783 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in November 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
40,400
Service connections
15,783
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Lancaster City Pws compare with other water systems in Fairfield County?
By EPA's size categories, Lancaster City Pws is a large system (10,001 to 100,000 people). Fairfield County has 70 active public water systems, and Lancaster City Pws is the largest of them by population served. Its population served is about 29 times the county average of 1,415 people per system, and accounts for 41% of the 99,017 people reported by systems filed under the county. Across Ohio, the 3,854 active systems average 2,767 people each. Nationally, the average active community water system reports serving 6,703 people, so Lancaster City Pws is about 6 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Ohio has 1,028 active community water systems, 27% of the state's 3,854 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,446 Ohio systems (89%) list groundwater as their primary source.
Who owns and regulates Lancaster City Pws?
EPA lists Lancaster City Pws as owned by a local government. The OH state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 16 of the 70 active systems in Fairfield County (23%) are also owned by a local government.
Does Lancaster City Pws have drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in November 2018. The violations listed here began between October 1995 and November 2018. By type: 2 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 as resolved and 1 as unaddressed. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2018-11-14 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 1996-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1995-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 3 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Lancaster City Pws: frequently asked questions
Who runs Lancaster City Pws?
Lancaster City Pws (PWSID OH2301012) is a community water system owned by a local government. It is regulated by the OH state drinking water program.
How many people does Lancaster City Pws serve?
Lancaster City Pws reports serving 40,400 people through 15,783 service connections in Fairfield County, Ohio.
Where does Lancaster City Pws get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Lancaster City Pws have any drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in November 2018. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Lancaster City Pws' water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in November 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.
Where can I find Lancaster City Pws' water quality report?
As a community water system, Lancaster City Pws must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Fairfield County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pickerington City Pws | Fairfield | 19,141 | Community | Groundwater |
| Fairfield County Utilities Pws | Fairfield | 15,486 | Community | Groundwater |
| Millersport Village Pws | Fairfield | 3,200 | Community | Groundwater |
| Baltimore Village Pws | Fairfield | 2,995 | Community | Groundwater |
| Canal Pointe Industrial Park Pws | Fairfield | 1,721 | Community | Purchased groundwater |
| Lithopolis Village Pws | Fairfield | 1,573 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Lancaster City Pws, PWSID OH2301012, Ohio”, https://aquacensus.com/water-systems/ohio/lancaster-city-pws-oh2301012 (data as of October 1, 2026).