AR / Danville
AR · Tap water records
Danville tap water, in plain English
Here is what the EPA's own data shows about tap water in Danville. According to EPA SDWIS data retrieved June 2026, Danville is served by 1 active community water system, together reported to serve about 2,810 people.
As of June 2026, EPA records show 101 violations across the community water system(s) serving Danville, going back to the earliest EPA record. 85 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
Danville Waterworks
2,810 served · surface water · PWSID AR0000603 - Health-based TTHM: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 19 times between April 2017 and July 2025. The EPA record lists a level of 82 UG/L; the limit (MCL) is 80 UG/L. EPA records do not show all of these as returned to compliance.
- Health-based Interim Enhanced Surface Water Treatment Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 6 times between January 2024 and February 2025. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
- Health-based Surface Water Treatment Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 39 times between December 2020 and January 2025. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
- Health-based Long Term 2 Enhanced Surface Water Treatment Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 3 times in November 2022. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
- Health-based Stage 1 Disinfectants and Disinfection Byproducts Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 18 times between May 2012 and October 2013. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
- Monitoring Public Notice: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times between June 2021 and November 2022. EPA records do not show all of these as returned to compliance.
- Monitoring contaminant code null: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 6 times between March 2020 and March 2021. 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 once in August 2020. EPA records do not show all of these as returned to compliance.
- Monitoring Surface Water Treatment Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in April 2020. EPA records do not show all of these as returned to compliance.
- Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between October 2006 and July 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.