336 active public water systems serve 778,705 people in Fairfield County. 87 are compliant, 249 had at least one EPA violation in the past three years, 7 are designated serious violators, and 43 carry a health flag.
Active systems33661 community systems
People served779Kby public water systems
Systems with violations24974% of active systems, past 3 years
Serious violators743 systems carry a health flag
Needs attention
Stanwich ClubCT0570164 · Greenwich · Non-Transient non-community system · Serves 1300 rules violated in the past three years
Rockrimmon Country ClubCT1350042 · Stamford · Non-Transient non-community system · Serves 604 rules violated in the past three years. Unresolved: Revised Total Coliform Rule and Lead and Copper Rule Revisions.
27 Maple DriveCT0859071 · Monroe · Community water system · Serves 383 rules violated in the past three years. Unresolved: Public Notice Rule and Revised PN Rule and Consumer Confidence Rule.
Keeler Ridgefield BCT1180322 · Ridgefield · Non-Transient non-community system · Serves 308 rules violated in the past three years. Unresolved: Revised Total Coliform Rule, Lead and Copper Rule Revisions, and Public Notice Rule and Revised PN Rule.
Merwin Meadows Town ParkCT1610094 · Wilton · Transient non-community system · Serves 253 rules violated in the past three years. Unresolved: Revised Total Coliform Rule and Ground Water Rule.
Rebellion Kitchen and BarCT0341244 · Danbury · Transient non-community system · Serves 253 rules violated in the past three years. Unresolved: Ground Water Rule and Public Notice Rule and Revised PN Rule.
Round Hill Community ChurchCT0570142 · Greenwich · Non-Transient non-community system · Serves 254 rules violated in the past three years. Unresolved: Lead and Copper Rule and Lead and Copper Rule Revisions.
Fairfield HillsCT0970021 · Newtown · Community water system · Serves 2,6103 rules violated in the past three years. Unresolved: Lead and Copper Rule and Lead and Copper Rule Revisions.
Ridgefield High and Middle SchoolCT1180382 · Ridgefield · Non-Transient non-community system · Serves 2,5751 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
New Fairfield Elementary SchoolCT0915053 · New Fairfield · Non-Transient non-community system · Serves 1,4253 rules violated in the past three years. Unresolved: Lead and Copper Rule and Lead and Copper Rule Revisions.
36 more systems with a serious violator or health flag designation are in the lists below.
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Connecticut records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.
Compliant
Compliant
No violations reported to EPA in the past three years.
At least one violation on record with EPA in the past three years. Many are monitoring or reporting lapses rather than contamination; the system page lists which rules were involved and whether each is still open.
EPA's designation, also called an enforcement priority, for a system with unresolved serious, multiple, or continuing violations. EPA expects the system and its state to act quickly to resolve them.
At least one open health-based violation: an exceedance of a maximum contaminant level or residual disinfectant level, or a treatment technique violation. Monitoring and reporting lapses do not raise this flag.