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Community Water System · PWS WI2650143

Interlaken Resort and Village

Lake Geneva, Wisconsin 53147 - drinking water served from groundwater sources to 500 people, tracked in EPA SDWIS and UCMR5.

500
People served
63
EPA violations
31
Health-based
Untested
UCMR5 result

The verdict

EPA records 63 drinking-water violations at Interlaken Resort and Village, 49% of them health-based - above the Wisconsin per-system average.

63
Total EPA violations on record
49%
Health-based (MCL / treatment failure)
500
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Interlaken Resort and Village

Interlaken Resort and Village is a private-owned community water system that delivers drinking water to 500 residents in Lake Geneva, Wisconsin (Walworth County) through 38 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 63 total violations for this system , of which 31 (49%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 11 monitoring and reporting violations are on file. The most recent violation on record dates to 2015.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 15 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Wisconsin, EPA tracks 10,988 public water systems serving 5,131,439 people, with 285,161 cumulative violations and 58,688 health-based violations on record. About 72% of systems in the state carry at least one violation, and state-wide the average per system is 26 violations. Statewide, 78 of 202 UCMR5-tested systems have reported PFAS detections (38.6%).

Interlaken Resort and Village's 63 violations sit above the Wisconsin average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
500
Total Violations
63
Health-Based Violations
31
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
38
County
Walworth
School/Daycare
No
MCL Violations
29
Monitoring Violations
11
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 15 2007
Public Notice Other 11 2007
Gross Alpha, Excl. Radon and U MCL 7 2005
Combined Radium (-226 and -228) MCL 7 2005
Arsenic MR 4 2015
Coliform (TCR) MR 3 1994
Barium MR 2 2000
Lead and Copper Rule MR 2 2001
Lead and Copper Rule TT 2 2001

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Interlaken Resort and Village.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID WI2650143 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Wisconsin Drinking Water Authority

Wisconsin DNR, Drinking Water and Groundwater is the primacy agency that licenses and inspects Interlaken Resort and Village under EPA-delegated authority.

Open WI regulator portal

Source: Wisconsin DNR, Drinking Water and Groundwater

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2015 Arsenic MR 4 SDWIS / WI2650143 / 1005
2007 Coliform (TCR) MCL 15 SDWIS / WI2650143 / 3100
2007 Public Notice Other 11 SDWIS / WI2650143 / 7500
2005 Gross Alpha, Excl. Radon and U MCL 7 SDWIS / WI2650143 / 4000
2005 Combined Radium (-226 and -228) MCL 7 SDWIS / WI2650143 / 4010
2001 Lead and Copper Rule MR 2 SDWIS / WI2650143 / 5000
2001 Lead and Copper Rule TT 2 SDWIS / WI2650143 / 5000
2000 Barium MR 2 SDWIS / WI2650143 / 1010
1994 Coliform (TCR) MR 3 SDWIS / WI2650143 / 3100

How Interlaken Resort and Village Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Interlaken Resort and Village Wisconsin avg Federal benchmark
Total violations 63 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 31 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 38.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 500 467 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 10,988 regulated public water systems in Wisconsin.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Interlaken Resort and Village water safe to drink? ▼
Interlaken Resort and Village (PWS ID: WI2650143) has 63 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 500 people using Groundwater sources.
How many people does Interlaken Resort and Village serve? ▼
Interlaken Resort and Village serves 500 people in Lake Geneva, Wisconsin. It is a Private-owned system using Groundwater water sources with 38 service connections.
What type of violations does Interlaken Resort and Village have? ▼
Interlaken Resort and Village has 63 total violations: 31 health-based violations (MCL exceedances or treatment failures), 11 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Interlaken Resort and Village water? ▼
No PFAS testing data is available for Interlaken Resort and Village under the EPA's UCMR5 monitoring program.
What water source does Interlaken Resort and Village use? ▼
Interlaken Resort and Village uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.