Does Redmond, WA tap water have any EPA-reported violations?

As of July 2026, EPA SDWIS records show 5 violation(s) across the community water systems serving Redmond, 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 Redmond, WA tap water come from?

Redmond is served by 4 active community water system(s). Their primary sources, per EPA records, are: surface water, groundwater.

WA / Redmond

WA · Tap water records

Redmond tap water, in plain English

Here is what the EPA's own data shows about tap water in Redmond. According to EPA SDWIS data retrieved July 2026, Redmond is served by 4 active community water systems, together reported to serve about 175,361 people.

As of July 2026, EPA records show 5 violations across the community water system(s) serving Redmond, 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.

4

Community water systems
~175,361

People served (EPA-reported)
July 2026

EPA records reviewed through

Compare with another city →

What the EPA has on record, by system

Redmond Water System City Of

163,335 served · surface water · PWSID WA5371650

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 2015. All have since returned to compliance, per EPA records.

Union Hill Water Association Inc

8,720 served · groundwater · PWSID WA5390260

Monitoring Nitrate: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in January 2023. 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 2 times between July 2010 and July 2013. All have since returned to compliance, per EPA records.

Ames Lake Water Assoc Inc

3,224 served · groundwater · PWSID WA5302055

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 2024. All have since returned to compliance, per EPA records.

New Horizons Mobile/Rv Park

82 served · groundwater · PWSID CA1000259

As of July 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.

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.