Does Knoxville, IA tap water have any EPA-reported violations?

As of June 2026, EPA SDWIS records show 7 violation(s) across the community water systems serving Knoxville, of which 0 are classified by the EPA as health-based. Most older violations have returned to compliance; see the per-system list.

Where does Knoxville, IA tap water come from?

Knoxville is served by 7 active community water system(s). Their primary sources, per EPA records, are: groundwater, surface water.

IA / Knoxville

IA · Tap water records

Knoxville tap water, in plain English

Here is what the EPA's own data shows about tap water in Knoxville. According to EPA SDWIS data retrieved June 2026, Knoxville is served by 7 active community water systems, together reported to serve about 15,173 people.

As of June 2026, EPA records show 7 violations across the community water system(s) serving Knoxville, 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.

7

Community water systems
~15,173

People served (EPA-reported)
June 2026

EPA records reviewed through

What the EPA has on record, by system

Knoxville Water Works

8,400 served · groundwater · PWSID IA6342036

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 July 1992. All have since returned to compliance, per EPA records.

Marion Co. Rural Water District

5,687 served · groundwater · PWSID IA6342711

Monitoring Public Notice: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in January 2025. EPA records do not show all of these as returned to compliance.
Monitoring Nitrite: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times in October 2023. EPA records do not show all of these as returned to compliance.

Wheel Estates Mhc

315 served · groundwater · PWSID IA6342301

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.

Colonial Terrace Mhp Llc

250 served · groundwater · PWSID IA6342601

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.

Hillock Estates

228 served · surface water · PWSID IA7727608

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.

Hartford Mhc Llc

183 served · surface water · PWSID IA9128301

Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in October 2019. All have since returned to compliance, per EPA records.

Vista Village Mhc

110 served · groundwater · PWSID IA6377601

Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in October 2019. 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.