111 active public water systems serve 535,388 people in Lake County. 38 are compliant, 73 had at least one EPA violation in the past three years, 3 are designated serious violators, and 5 carry a health flag.
Active systems11130 community systems
People served535Kby public water systems
Systems with violations7366% of active systems, past 3 years
Serious violators35 systems carry a health flag
Needs attention
Cedar Lake United Methodist ChurchIN2450056 · Cedar Lake · Transient non-community system · Serves 613 rules violated in the past three years. Unresolved: E. coli (Escherichia coli) and Revised Total Coliform Rule (RTCR).
Museum at Lassens ResortIN2450033 · Cedar Lake · Transient non-community system · Serves 522 rules violated in the past three years. Unresolved: Revised Total Coliform Rule (RTCR).
Cedar Creek Family Golf CenterIN2450863 · Cedar Lake · Transient non-community system · Serves 323 rules violated in the past three years. Unresolved: Revised Total Coliform Rule (RTCR).
Bethel Church Cedar LakeIN2450329 · Cedar Lake · Transient non-community system · Serves 4731 rule violated in the past three years. Unresolved: Groundwater Rule (GWR).
Indian Ridge Golf CourseIN2450036 · Hobart · Transient non-community system · Serves 1062 rules violated in the past three years. Unresolved: Groundwater Rule (GWR).
Oak Knoll Golf CourseIN2450807 · Lowell · Transient non-community system · Serves 802 rules violated in the past three years. Unresolved: E. coli (Escherichia coli) and Revised Total Coliform Rule (RTCR).
Franks Backyard BbqIN2450078 · Cedar Lake · Transient non-community system · Serves 402 rules violated in the past three years. Unresolved: Groundwater Rule (GWR).
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 Indiana 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. Retrieved from ECHO on Oct 11, 2026.
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.