Does Hauppauge, NY tap water have any EPA-reported violations?

As of June 2026, EPA SDWIS records show 13 violation(s) across the community water systems serving Hauppauge, of which 3 are classified by the EPA as health-based. Most older violations have returned to compliance; see the per-system list.

Where does Hauppauge, NY tap water come from?

Hauppauge is served by 2 active community water system(s). Their primary sources, per EPA records, are: groundwater.

NY / Hauppauge

NY · Tap water records

Hauppauge tap water, in plain English

Here is what the EPA's own data shows about tap water in Hauppauge. According to EPA SDWIS data retrieved June 2026, Hauppauge is served by 2 active community water systems, together reported to serve about 1,102,050 people.

As of June 2026, EPA records show 13 violations across the community water system(s) serving Hauppauge, going back to the earliest EPA record. 3 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.

2

Community water systems
~1,102,050

People served (EPA-reported)
June 2026

EPA records reviewed through

What the EPA has on record, by system

Suffolk County Water Authority

1,100,000 served · groundwater · PWSID NY5110526

Health-based Asbestos: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 2 times between July 2020 and July 2020. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
Health-based Manganese: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded once in January 2018. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
Monitoring Iron: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times between November 2024 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring pH, CaCO3 Stability S.U.: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times in July 2022. 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 2 times between January 2017 and August 2018. EPA records do not show all of these as returned to compliance.
Monitoring Coliform (Pre-TCR): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times between January 2018 and July 2018. All have since returned to compliance, per EPA records.

Riverside Water District

2,050 served · groundwater · PWSID NY5105655

As of June 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 June 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.