MO / Doniphan
MO · Tap water records
Doniphan tap water, in plain English
Here is what the EPA's own data shows about tap water in Doniphan. According to EPA SDWIS data retrieved June 2026, Doniphan is served by 4 active community water systems, together reported to serve about 7,985 people.
As of June 2026, EPA records show 42 violations across the community water system(s) serving Doniphan, going back to the earliest EPA record. 26 of these are classified by the EPA as health-based (a contaminant recorded above the limit the EPA tracks); the rest are monitoring or reporting violations. Each is listed by system below, with its status.
What the EPA has on record, by system
Ripley County Pwsd 2
2,780 served · groundwater · PWSID MO4024523 - Health-based Groundwater Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 2 times between October 2021 and July 2024. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
- Monitoring Public Notice: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times between January 2022 and September 2024. All have since returned to compliance, per EPA records.
Ripley County Pwsd 1 East
2,265 served · groundwater · PWSID MO4024521 - Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in August 2025. All have since returned to compliance, per EPA records.
Doniphan Pws
2,000 served · groundwater · PWSID MO4010221 - Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times between July 2013 and July 2023. All have since returned to compliance, per EPA records.
- Monitoring TTHM: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in January 2021. EPA records do not show all of these as returned to compliance.
- Monitoring Total Haloacetic Acids (HAA5): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in January 2021. EPA records do not show all of these as returned to compliance.
Ripley County Pwsd 1 West
940 served · groundwater · PWSID MO4024522 - Health-based Combined Radium (-226 and -228): a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 12 times between April 2019 and July 2020. The EPA record lists a level of 6.83 PCI/L; the limit (MCL) is 5 PCI/L. All have since returned to compliance, per EPA records.
- Health-based Gross Alpha, Excl. Radon and U: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 12 times between April 2019 and July 2020. The EPA record lists a level of 15.51 PCI/L; the limit (MCL) is 15 PCI/L. All have since returned to compliance, per EPA records.
- Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in August 2025. 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.