IA / Ossian
IA · Tap water records
Ossian tap water, in plain English
Here is what the EPA's own data shows about tap water in Ossian. According to EPA SDWIS data retrieved June 2026, Ossian is served by 4 active community water systems, together reported to serve about 1,110 people.
As of June 2026, EPA records show 5 violations across the community water system(s) serving Ossian, 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
Ossian Water Supply
802 served · groundwater · PWSID IA9677007 - Monitoring Di(2-ethylhexyl) adipate: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in October 2018. EPA records do not show all of these as returned to compliance.
- Monitoring Di(2-ethylhexyl) phthalate: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in October 2018. EPA records do not show all of these as returned to compliance.
Castalia Water Works
145 served · groundwater · PWSID IA9620082 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.
Frankville Rwd
135 served · groundwater · PWSID IA9644001 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.
Deerfield Heights Association
28 served · groundwater · PWSID IA9630316 - 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 2006. All have since returned to compliance, per EPA records.
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.