Here is what the EPA's own data shows about tap water in Greenwood. According to EPA SDWIS data retrieved July 2026, Greenwood is served by 3 active community water systems, together reported to serve about 25,768 people.
As of July 2026, EPA records show 172 violations across the community water system(s) serving Greenwood, going back to the earliest EPA record. 146 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.
Health-based TTHM: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 21 times between October 2015 and April 2020. The EPA record lists a level of 82 UG/L; the limit (MCL) is 80 UG/L. All have since returned to compliance, per EPA records.
Monitoring Chlorine dioxide: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in May 2025. EPA records do not show all of these as returned to compliance.
Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times in November 2019. All have since returned to compliance, per EPA records.
Greenwood Waterworks
9,905 served · surface water · PWSID AR0000504
Monitoring Chlorine dioxide: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 12 times between January 2023 and February 2023. 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 4 times in June 2022. 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 3 times in April 2021. All have since returned to compliance, per EPA records.
Milltown-Washburn Water Users
4,325 served · surface water · PWSID AR0000773
Health-based TTHM: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 125 times between April 2015 and April 2023. 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 3 times in December 2020. 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 July 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.