CO / Arvada
CO · Tap water records
Arvada tap water, in plain English
Here is what the EPA's own data shows about tap water in Arvada. According to EPA SDWIS data retrieved June 2026, Arvada is served by 3 active community water systems, together reported to serve about 173,420 people.
As of June 2026, EPA records show 18 violations across the community water system(s) serving Arvada, 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
Arvada City Of
171,610 served · surface water · PWSID CO0130001 - Monitoring Interim Enhanced Surface Water Treatment Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 6 times between May 2024 and June 2024. All have since returned to compliance, per EPA records.
- Monitoring Surface Water Treatment Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 10 times between February 2024 and March 2024. EPA records do not show all of these as returned to compliance.
Ralston Valley Wsd
1,610 served · surface water · PWSID CO0130667 - 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.
Aspen Terrace Mobile Park
200 served · surface water · PWSID CO0116122 - 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 October 2025. EPA records do not show all of these as returned to compliance.
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.