OH / Lancaster
OH · Tap water records
Lancaster tap water, in plain English
Here is what the EPA's own data shows about tap water in Lancaster. According to EPA SDWIS data retrieved June 2026, Lancaster is served by 6 active community water systems, together reported to serve about 59,325 people.
As of June 2026, EPA records show 9 violations across the community water system(s) serving Lancaster, going back to the earliest EPA record. None were health-based; the records are monitoring or reporting violations (a required test or report was late or missed). Each is listed by system below, with its status.
What the EPA has on record, by system
Lancaster City Pws
40,400 served · groundwater · PWSID OH2301012 - Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in November 2018. EPA records do not show all of these as returned to compliance.
Fairfield County Utilities Pws
15,486 served · groundwater · PWSID OH2301912 As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.
Odrc-Southeastern Correctional Institute
1,461 served · groundwater · PWSID OH2301412 - Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times between July 2008 and October 2022. EPA records do not show all of these as returned to compliance.
Little Walnut Water Treatment Facility
1,428 served · groundwater · PWSID OH2303212 - Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in July 2009. All have since returned to compliance, per EPA records.
Greenfield Twp Water District
490 served · groundwater · PWSID OH2301812 - Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in July 2009. All have since returned to compliance, per EPA records.
- Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in January 1995. All have since returned to compliance, per EPA records.
Brookdale Mobile Home Park
60 served · groundwater · PWSID OH2302012 As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.
What this means
A health-based violation means a contaminant was recorded above the limit the EPA tracks for it. A monitoring or reporting violation means a required test or report was late or missed — not that a contaminant was measured above a limit. “Returned to compliance” means the EPA recorded the issue as resolved.
This page summarizes the EPA's own records and does not assess whether your water is safe to drink. For the most current details, you can verify every record directly with the EPA, and contact your water system with questions.
Source: U.S. EPA Envirofacts SDWIS, retrieved June 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.